Transition in the corner or connection, the use of welding for optimal performance. To maintain continuity between the surface magnetic field lines can be guaranteed a low reluctance path along its row forward, this can increase the shielding effectiveness. In the exchange market to maintain continuity allows higher magnetic induced current shielding, in the DC field, the magnetic field lines for the appropriate shunt, continuity is important. If you are not close to the shield at one end or both ends, paying particular attention to the beginning of the one-diameter ratio. This shield length - diameter ratio should be at least 4:1, in order to avoid "termination effect" and the range of magnetic field lines penetrate the shield. Rule of thumb is extended to the need to shield the external device, so you can use with hole radius equal parts protection.The blocking radius range of cell phone jammer is dependent on signal strength of site working environment. Because of the increased length of the shield while maintaining the same diameter, you can use the infinite cylinder model approximation. When a cylindrical or rectangular shield needs a big hole, perpendicular to the shield wall of the tube can be used as shield openings caused by the reduction of the magnetic field strength.
Low-cost shield design the most important step is typical of these characteristics and shielding material understanding of the impact on the shielding performance. Once the appropriate material is selected, the focus should be concentrated on the basic design considerations, so that it is not only best performance, and minimal impact on cost. 3 Most of the shield design considerations and models with the development of the formula is based on circular or infinitely long cylinder geometry. In practice, the practice of a given shape of the shield and the shield from the device structure itself can be determined by the use of space. In the design of a shield, important to understand the structure is rotated 90 ° to make the magnetic field lines is difficult. cell phone jammer is also used in the prison, detention house, court, police station and so on which have requirements for the secrecy. However, the round shield, for example, to change the angle of the cylinder or a circular magnetic field lines of the box than the direction of the shield with square corners easier. Similarly, for the inclusion of magnetic shielding material has entered the line and change its direction, better rounded than the sharp corners. Maintained to provide a low reluctance path of the magnetic shield shape of a simple movement or the "minimum reluctance path" is very important. Shield the size of the shielding effectiveness and cost of great importance. The smaller the effective radius of the shield, the better its overall performance. However, the design is intended to shield the envelope and trying to shield the space components, and should be very close. cell phone jammer still can be used in such serious locations as the party and government institutions, enterprise meeting rooms, concert halls, theaters and so on which need tranquility.Since materials account for most of the shield design costs, smaller shield can be obtained at a lower cost on better performance. Whenever possible, shield wall should be close to all, to avoid field leakage. This structure (even rectangular) is closest to the circular, it can create a semi-closed magnetic circuit. In addition, all the cabinet can be shielded in all axes, so as to ensure the best shielding. When a special performance and import and export needs, removable cover, hood and doors can be combined into the design of the shield to go. In the use of cover, hood and doors or use two or more panels to build the shield, in many boards have maintained contact with the magnetic and electrical continuity is very important. cell phone jammer can block the signals of GSM/CDMA/DCS/PHS within the radius range of 1-20m. Can be mechanical (using friction components) or magnetic welding to maintain continuity.
Wednesday, May 23, 2012
Cell phone jammer can cut off inter-cell phone communication
Channel is borne water vendors, through which vendors can "flow" to the user, the water can carry a boat, can also capsize, channel structure is reasonable, water flow, it will seize the users according to market demand, the manufacturers enormous value; when the channel blocking occurs when the upstream firms will quickly fall into collapse. Domestic mobile phone makers should pay close attention to changes in the pattern of domestic sources, to establish a value-added transformation of consciousness at the core of the channel, and adjust their time to build their own distribution system can control channel resources and channel advantages, who can grasp the flow of sales channels and a huge sales network, who had the last laugh in the year. cell phone jammer will act in the whole working frequency range of cell phone. This rapid growth is bound to affect the global market, leading to reduced profits and the industry is facing the danger of competition. According to Gartner Dataquest research data show that consumers buy mobile phones worldwide annual average price fell nearly 10% since 1996 to $ 411 $ 206 last year. However, with the rapid growth of those new Asian firms gain economies of scale, they will be the mass influx of international markets, leading to further decline in handset prices. Beijing consulting firm MFC Insight's telecommunications industry analyst Peter. La Rock (Peter Lovelock) said that China's mobile phone manufacturers are contributing to the "mobile phone price all the way down, and accelerate the pace of decline in price." In contrast, Nokia is counting on its strong brand strength and technical innovation to a large number of new competitors from Asia stand out. cell phone jammer can cut off inter-cell phone communication.
However, although the Chinese mobile phone manufacturers has been lacking in technological innovation, but they compete in the market to bridge this gap by speed. Competition in the market right now, mobile phone manufacturers to consumers respond to changing preferences have become increasingly important, and business outsourcing model allows them to gain a greater advantage. MFC Insight's Laffer Locke said that this growth has forced the global industry giants to respond. "Nokia, Motorola and Samsung are increasing their number of models each year," he said, "This is directed at China (phone manufacturer) response." cell phone jammer is easy to control the covering range.
Gongzhufen is Beijing's largest mobile phone market, mobile phone giant Nokia ad placed in the most prominent position, and its aggressive advertising words would be: "Every time you blink an eye, Nokia has sold out of four phones." However, in this billboard are in the Chinese mobile phone market, is undergoing a change from quantitative to qualitative change. According to the Ministry of Information Industry, Economic Reform and Economic Operations Division provides the latest data, in the first quarter, overall sales of domestic mobile phone market has more than 50% of total sales. Although this data is not based on statistical sources first-hand mobile phone stores, but at least that made mobile phones is still relatively strong growth momentum continues. Motorola, Nokia, Samsung may be less this year better than the day to TCL, Bird, Amoi is the vanguard of the local phone companies in both camps clearly not satisfied with the performance. Communication between the cell phone and base station can be cut off because of cell phone jammer .
But it is equally clear that those who triumph in the domestic mobile phone companies in the star, will undergo more tests. Many Chinese have turned to the humble mobile phone manufacturing companies are the field quickly will have the basic functions of mobile phones into a mass commodity, and because the low prices of these companies on the market have been leading the industry out of the market risk. Still in the industry such as Nokia and Motorola dominated by a few global giants, which control 55% of the global market. However, in China alone more than 20 companies have entered this business, in just three years, they are in China's domestic market (the world's largest mobile phone market) share from almost zero to the level of a sudden surge 20 percent. This kind of calculation method of cell phone jammer is easy.
However, although the Chinese mobile phone manufacturers has been lacking in technological innovation, but they compete in the market to bridge this gap by speed. Competition in the market right now, mobile phone manufacturers to consumers respond to changing preferences have become increasingly important, and business outsourcing model allows them to gain a greater advantage. MFC Insight's Laffer Locke said that this growth has forced the global industry giants to respond. "Nokia, Motorola and Samsung are increasing their number of models each year," he said, "This is directed at China (phone manufacturer) response." cell phone jammer is easy to control the covering range.
Gongzhufen is Beijing's largest mobile phone market, mobile phone giant Nokia ad placed in the most prominent position, and its aggressive advertising words would be: "Every time you blink an eye, Nokia has sold out of four phones." However, in this billboard are in the Chinese mobile phone market, is undergoing a change from quantitative to qualitative change. According to the Ministry of Information Industry, Economic Reform and Economic Operations Division provides the latest data, in the first quarter, overall sales of domestic mobile phone market has more than 50% of total sales. Although this data is not based on statistical sources first-hand mobile phone stores, but at least that made mobile phones is still relatively strong growth momentum continues. Motorola, Nokia, Samsung may be less this year better than the day to TCL, Bird, Amoi is the vanguard of the local phone companies in both camps clearly not satisfied with the performance. Communication between the cell phone and base station can be cut off because of cell phone jammer .
But it is equally clear that those who triumph in the domestic mobile phone companies in the star, will undergo more tests. Many Chinese have turned to the humble mobile phone manufacturing companies are the field quickly will have the basic functions of mobile phones into a mass commodity, and because the low prices of these companies on the market have been leading the industry out of the market risk. Still in the industry such as Nokia and Motorola dominated by a few global giants, which control 55% of the global market. However, in China alone more than 20 companies have entered this business, in just three years, they are in China's domestic market (the world's largest mobile phone market) share from almost zero to the level of a sudden surge 20 percent. This kind of calculation method of cell phone jammer is easy.
High-power electromagnetic radiation of cell phone jammer
Costs hereby (Marcel Fenez) said: "This advantage can be reduced (handset manufacturers) in the plant and machinery equipment investment, and avoid the risk of idle plant equipment there." High-power electromagnetic radiation of cell phone jammer is not harmful to people’s health. Lewis said that Nokia invested in this technology a lot of money, and that ordinary consumers are willing to pay extra fees for them. He talked about the acceptance of high-end services in poor condition, said: "This assumption has not been confirmed in the market." In Beijing, a wireless industry consultant David. Alm Strom (David Almstrom) that the majority of mobile phone users worldwide, especially in Latin America, Africa and Eastern Europe for the first time phone users still need to have basic communication-enabled mobile phones. The former Ericsson executives said: "China (cell phone) manufacturers have an advantage in these markets. That it is their long-term." Feedback messages from the market point of view, the current domestic brand mobile phones in consumers' minds awareness rising, domestic mobile phone in recent years continues to grow, in some areas has become a clear trend, forming a greater advantage, but at the moment in the development and growth of the domestic mobile phone also has some problems. cell phone jammer makes the cell phones in the specific area not be connected.
Recently in the "Beijing Youth Daily," held the first "Forum on China-made mobile phones", from Bird, TCL, Kejian, Amoi, Lenovo, Panda, Eastcom, Capitel made mobile phones more than a dozen other national representatives, and industry experts and with representatives of consumers, many of the current difficulties of domestic mobile phone issues were discussed. Telecommunications Science and Technology Information Institute, deputy director of Song Tong in his speech, very representative summed up the domestic mobile phone market is currently emerging characteristics. Communications market in China for many years maintained a momentum of rapid development, causing the domestic mobile phone manufacturers concerned. There are many companies converting domestic mobile phone plan initiatives, especially those of foreign companies, there is still a joint venture to do business plans. Take the GSM system influenced by cell phone jammer for example in this text.
These effects in China low-cost, high-volume manufacturing environment has been enlarged, so that from the TV to mobile phones and other electronic audio products, lower profit margins in China embarked on the road to mass production. hilips Semiconductor responsible for the supply of chips to handset manufacturers group senior vice president of Peter. (Peter Baumgartner), said: "I fully believe that Chinese companies will control the (global) low-end mobile phone market." However, China does not have a mobile phone brand in London or New York can be one to compete with Nokia. The growth in domestic demand led China mobile phone manufacturers everywhere, China is still a month to add about 300 million mobile phone users. However, the Chinese mobile phone manufacturers need to integrate first, then it may be the birth of a sufficient size companies, directly to the industry leader in the international market, issued a challenge. cell phone jammer may interfere with the mobile communication base station.
Motorola and other mobile phone manufacturing giant this understatement, that this threat is limited to low-end phones, said they will continue to offer (newer) technology to maintain their leading position. Motorola in Hong Kong responsible for the technological innovation strategy, marketing director Stephen Tsao said that the current mobile phones tend to include more rich functionality. He expects to increase through the mobile phone camera, music, Internet and video games and other functions, Motorola's handset business will maintain its profit margins. Some analysts said that these attractive features (whether to play the role) has not yet been confirmed. London telecom consultancy ARCchart Ltd.'s Analyst Matt. cell phone jammer may even palsy the communication base nearby.
Recently in the "Beijing Youth Daily," held the first "Forum on China-made mobile phones", from Bird, TCL, Kejian, Amoi, Lenovo, Panda, Eastcom, Capitel made mobile phones more than a dozen other national representatives, and industry experts and with representatives of consumers, many of the current difficulties of domestic mobile phone issues were discussed. Telecommunications Science and Technology Information Institute, deputy director of Song Tong in his speech, very representative summed up the domestic mobile phone market is currently emerging characteristics. Communications market in China for many years maintained a momentum of rapid development, causing the domestic mobile phone manufacturers concerned. There are many companies converting domestic mobile phone plan initiatives, especially those of foreign companies, there is still a joint venture to do business plans. Take the GSM system influenced by cell phone jammer for example in this text.
These effects in China low-cost, high-volume manufacturing environment has been enlarged, so that from the TV to mobile phones and other electronic audio products, lower profit margins in China embarked on the road to mass production. hilips Semiconductor responsible for the supply of chips to handset manufacturers group senior vice president of Peter. (Peter Baumgartner), said: "I fully believe that Chinese companies will control the (global) low-end mobile phone market." However, China does not have a mobile phone brand in London or New York can be one to compete with Nokia. The growth in domestic demand led China mobile phone manufacturers everywhere, China is still a month to add about 300 million mobile phone users. However, the Chinese mobile phone manufacturers need to integrate first, then it may be the birth of a sufficient size companies, directly to the industry leader in the international market, issued a challenge. cell phone jammer may interfere with the mobile communication base station.
Motorola and other mobile phone manufacturing giant this understatement, that this threat is limited to low-end phones, said they will continue to offer (newer) technology to maintain their leading position. Motorola in Hong Kong responsible for the technological innovation strategy, marketing director Stephen Tsao said that the current mobile phones tend to include more rich functionality. He expects to increase through the mobile phone camera, music, Internet and video games and other functions, Motorola's handset business will maintain its profit margins. Some analysts said that these attractive features (whether to play the role) has not yet been confirmed. London telecom consultancy ARCchart Ltd.'s Analyst Matt. cell phone jammer may even palsy the communication base nearby.
Cell phone jammer received during communication can be divided into the following
The cell phone in a cell contacts with base station through the uplink frequency of the channel during communication and this process can be influenced by cell phone jammer . Strategy for the use of large-scale companies, each on a scale level, the unit cost will decrease, while the decrease in cost compared to the sharp decline in prices has laid the foundation for this strategy opened the opponent's distance, to obtain maintain a competitive advantage and the foundation. In this case, unless the competitor can form a significant difference in the quality of technology, in a smaller market to obtain a small profit in order to withstand the impact of this price. This result is a large number of small and no significant difference in technology companies will exit the mobile phone market. Low-end mobile phone manufacturers market competition, on the one hand to expand the production scale, increase market share and maintain healthy growth. Every frequency range which might be blocked by cell phone jammer contains many channels of the certain bandwidth.
On the other hand, the market demand is constantly changing, and only suitable for users to meet user needs, always grasp the pulse of the market, increase innovation, in order to maintain the freshness of the consumer, in order to meet the mobile phone market, the pursuit of the new consumer trends . The new face of the new low-cost handset market trend, "the scale of + innovative" state-owned foreign brands brand competition, competition in an invincible position in an effective strategy. Rely mainly on the establishment of brand image advertising advantage, high-quality product quality and perfect after-sales service. Every cell where might install several cell phone jammer .
By the scale of operation, expand markets, reduce operating costs and increase investment in technology to enable enterprises to improve competitiveness. In the specialized field of bigger, stronger, through the scale must depend on the support. Technology investments must be based on the formation of scale on the basis of comparative advantage. Why foreign companies can easily invest billions to develop mobile technology? And why the Chinese mobile phone manufacturers can only imitate, to follow up? The underlying reason is the size of production. Determine the size of the product cost sharing (including: technology development costs, production operating costs, cost of sales promotion, etc.), technology development needs of technical input, technical input on the need to share in each product. And then, the signal can be turned to MSC to realize communication with the other cell phone or telephone which can be shielded by cell phone jammer .
Production of 10 million mobile phones the size of the company (on a per cell phone sale price of 2,000 yuan) sales income of 200 million, 10% of the 200 million investment in technical development, sharing an average of 20 dollars per phone. For there is no scale companies, such as 100 million mobile phones the size of the company producing the same 200 million investment in technical development, the average 200 dollars per phone sharing, it is clear even if the investment does not produce anything competitive. The other hand, Motorola, Nokia, represented by foreign brands, the low-end mobile phone market long dominated the vast majority of market share, just keep the momentum of innovation, has introduced consumers to new products, we can maintain and even expand market share. The radio frequency which might be jammed by cell phone jammer received during communication can be divided into the following according to the frequency range.
On the other hand, the market demand is constantly changing, and only suitable for users to meet user needs, always grasp the pulse of the market, increase innovation, in order to maintain the freshness of the consumer, in order to meet the mobile phone market, the pursuit of the new consumer trends . The new face of the new low-cost handset market trend, "the scale of + innovative" state-owned foreign brands brand competition, competition in an invincible position in an effective strategy. Rely mainly on the establishment of brand image advertising advantage, high-quality product quality and perfect after-sales service. Every cell where might install several cell phone jammer .
By the scale of operation, expand markets, reduce operating costs and increase investment in technology to enable enterprises to improve competitiveness. In the specialized field of bigger, stronger, through the scale must depend on the support. Technology investments must be based on the formation of scale on the basis of comparative advantage. Why foreign companies can easily invest billions to develop mobile technology? And why the Chinese mobile phone manufacturers can only imitate, to follow up? The underlying reason is the size of production. Determine the size of the product cost sharing (including: technology development costs, production operating costs, cost of sales promotion, etc.), technology development needs of technical input, technical input on the need to share in each product. And then, the signal can be turned to MSC to realize communication with the other cell phone or telephone which can be shielded by cell phone jammer .
Production of 10 million mobile phones the size of the company (on a per cell phone sale price of 2,000 yuan) sales income of 200 million, 10% of the 200 million investment in technical development, sharing an average of 20 dollars per phone. For there is no scale companies, such as 100 million mobile phones the size of the company producing the same 200 million investment in technical development, the average 200 dollars per phone sharing, it is clear even if the investment does not produce anything competitive. The other hand, Motorola, Nokia, represented by foreign brands, the low-end mobile phone market long dominated the vast majority of market share, just keep the momentum of innovation, has introduced consumers to new products, we can maintain and even expand market share. The radio frequency which might be jammed by cell phone jammer received during communication can be divided into the following according to the frequency range.
The cell phone can not send information outside
Effectiveness and connection of the whole network covering range which can be influenced by cell phone jammer should be considered. With the rapid development of Internet in China, making people's lives become increasingly inseparable from the network, more and more dependent on the network to bring the convenience, or because most people use desktop computers, laptop wireless Internet access technology is not really been implemented, people put the needs of sustenance to the phone. Therefore, wireless Internet, send and receive E-mail, mobile QQ, multimedia messaging and other functions has become a major market demand. GPRS and W-CDMA handsets for the sudden emergence of KJava present, many manufacturers use a wide range of applications KJava to write software programs, the development of stocks, games, shopping, remote control, infrared transmission products such as mobile extensions, to promote consumption those of the entertainment needs. It should be noted that, color, rotation, etc. there is a voice and MMS mobile phones look and function of innovation, but also attracted a new group of "chasing the new family", especially the "polyphonic music," singing the entire 2007 In the mobile phone market. Other channels are called the traffic channel which also can be blocked by cell phone jammer .
Product integration is the basic trend of product development, functional integration on the one hand the performance of mobile phones and other digital products, integration, the formation of mobile multimedia terminal, on the other, communications and computer products, home appliance convergence. If consumers FM tuner, MP3 and other functional requirements have been emerging trends. Design competition in 2006, the focus of one of the mobile phone market, innovation and competitive differentiation is the key to winning. It can be seen, most of the needs of the market demand is an extension of the previous year, so that the integration of phone features and the pursuit of diversity will be the next trend. The cell phone can not send information outside if cell phone jammer is used.
Therefore, only 18% of mobile phone with Internet access, has not been very widely used. SMS rates are cheaper, so SMS will always be demand for the hottest features. Although the concept of mobile phone consumers have been great changes, but the functional requirements still in relatively early stage. In 2008, Chinese mobile phone market continued to expand, which means the phone is a stylish appearance of the basic requirements of individual consumer, the consumer phone features, the pursuit of style is intensified. Appearance is still a hot pursuit of the consumer. The pursuit of the appearance of mobile phones has been reflected in 2001 on, but then focus on the style to light, narrow, short, small, and the color is relatively small, mostly stay in the black, blue, white, gray and four colors, consumer can choose the range is not very wide. However, the cell phone will generate some problems which can not be ignored so that cell phone jammer has to be used.
To 2007, manufacturers are firmly grasp the people of this consumer demand, mobile phone design with soft tone multi-color-based, while the emergence of red, purple and other bright colors, can be described as colorful, but also in appearance showing a trend of small, thin, won by consumers. Ringtones / download pictures, light / sound identification calls, adjustable backlight and other functions has become a hot topic sought after consumers. Is not difficult to see that these functions are used to dress the primary means of phone, personal cell phone is the pursuit of fashion trends at the time, coupled with consumers the freshness of these new features, these features undoubtedly become the biggest winner. The cell phone can not use the network due to use of cell phone jammer .
Product integration is the basic trend of product development, functional integration on the one hand the performance of mobile phones and other digital products, integration, the formation of mobile multimedia terminal, on the other, communications and computer products, home appliance convergence. If consumers FM tuner, MP3 and other functional requirements have been emerging trends. Design competition in 2006, the focus of one of the mobile phone market, innovation and competitive differentiation is the key to winning. It can be seen, most of the needs of the market demand is an extension of the previous year, so that the integration of phone features and the pursuit of diversity will be the next trend. The cell phone can not send information outside if cell phone jammer is used.
Therefore, only 18% of mobile phone with Internet access, has not been very widely used. SMS rates are cheaper, so SMS will always be demand for the hottest features. Although the concept of mobile phone consumers have been great changes, but the functional requirements still in relatively early stage. In 2008, Chinese mobile phone market continued to expand, which means the phone is a stylish appearance of the basic requirements of individual consumer, the consumer phone features, the pursuit of style is intensified. Appearance is still a hot pursuit of the consumer. The pursuit of the appearance of mobile phones has been reflected in 2001 on, but then focus on the style to light, narrow, short, small, and the color is relatively small, mostly stay in the black, blue, white, gray and four colors, consumer can choose the range is not very wide. However, the cell phone will generate some problems which can not be ignored so that cell phone jammer has to be used.
To 2007, manufacturers are firmly grasp the people of this consumer demand, mobile phone design with soft tone multi-color-based, while the emergence of red, purple and other bright colors, can be described as colorful, but also in appearance showing a trend of small, thin, won by consumers. Ringtones / download pictures, light / sound identification calls, adjustable backlight and other functions has become a hot topic sought after consumers. Is not difficult to see that these functions are used to dress the primary means of phone, personal cell phone is the pursuit of fashion trends at the time, coupled with consumers the freshness of these new features, these features undoubtedly become the biggest winner. The cell phone can not use the network due to use of cell phone jammer .
The corresponding cell where cell phone jammer
cell phone jammer is easy to control the covering range.
Moreover, the technology in broadband wireless communications field, including a large number of high-tech knowledge content, from system architecture, all-optical networks, protocol structure, coded modulation, multi-site connections, to decline against the detection process, and many other aspects of personal terminal, set signal system designed to handle the latest in modern technology and baseband, IF and even the high-frequency, optical and other VLSI technology processes in one, there are a lot of room for innovation there, and there is a corresponding economic value of intellectual property rights. In this regard, China's manufacturers, the operator operator, research departments and investment are required to establish a close strategic partnership. Recently some manufacturers from frequent moves, cell phone price war will burn in the recent war in the high-end market. Every base station which might be influenced by cell phone jammer contains the transceiver.
Of course, ultimately depends on the mobile phone industry competitive products, advertising sold well, also the game is that the product can not keep up. There are indications that the war made high-end mobile phones already start a prairie fire, recent large-scale fights may be imminent. According to statistics, 21-25 ,26-30-year-old two-year-old consumer group is the main force of China's mobile phone market, and its proportion has reached 46% in 2007. The fashion is to embody the personality characteristics of young people, and for more emphasis on the choice of mobile phone handsets can show their personality style. Therefore, the demand will take on the appearance of an increasingly important position. The late 1990s, the Chinese mobile phone market in the cultivation of market development period, mobile phones at the time was noble, a status symbol, but with the changing perceptions of consumers on the phone, they really need the phone for the Chinese people, Chinese input also increasingly important. The cell phone brings hidden risk to the enterprise’s safe production so that cell phone jammer is also used and installed in the workshop or factory.
Well, as TD-SCDMA should create a favorable environment for development, support their own technical standards. However, this support is not unlimited, the final choice or according to the laws of the market, not blind support. Develop its 3G manufacturing industry, can also mimic the path taken by program-controlled switches, namely the introduction, digestion and absorption. This approach is the essence of open trade, in accordance with rules of the market, through the market economy to achieve survival of the fittest. Of course, national communications enterprise technology capabilities, can greatly shorten the process. Now, with ZTE, Huawei, as the representative of the national telecommunications companies have in some ways have the ability to par with international standards. cell phone jammer will output voltage via transformation rectifier.
View from the resource potential of broadband, third generation mobile communication frequency band, to expand from its core band frequencies, are subject to the following 3GHz. From L, S, C, X, Ku, Ka to V / Q / W, EHF may extend the practical, and more broadly Radio (several kHz-3000GHz) to Wi-reless (greater than 3000GHz), the future Wireless infrared light and blue light may reach the band, as well as particles like neutrinos communication connection, Air Optical like free-space optical (FSO) broadband wireless access system that is for example. Thus, broadly Wireless (Wire-less) communication concepts of view, the broadband and broadband resources will also be showing a broad space for development. Under the standby condition, the cell phone can intermittently start the receiving circuit to receive BCH in the corresponding cell where cell phone jammer .
Moreover, the technology in broadband wireless communications field, including a large number of high-tech knowledge content, from system architecture, all-optical networks, protocol structure, coded modulation, multi-site connections, to decline against the detection process, and many other aspects of personal terminal, set signal system designed to handle the latest in modern technology and baseband, IF and even the high-frequency, optical and other VLSI technology processes in one, there are a lot of room for innovation there, and there is a corresponding economic value of intellectual property rights. In this regard, China's manufacturers, the operator operator, research departments and investment are required to establish a close strategic partnership. Recently some manufacturers from frequent moves, cell phone price war will burn in the recent war in the high-end market. Every base station which might be influenced by cell phone jammer contains the transceiver.
Of course, ultimately depends on the mobile phone industry competitive products, advertising sold well, also the game is that the product can not keep up. There are indications that the war made high-end mobile phones already start a prairie fire, recent large-scale fights may be imminent. According to statistics, 21-25 ,26-30-year-old two-year-old consumer group is the main force of China's mobile phone market, and its proportion has reached 46% in 2007. The fashion is to embody the personality characteristics of young people, and for more emphasis on the choice of mobile phone handsets can show their personality style. Therefore, the demand will take on the appearance of an increasingly important position. The late 1990s, the Chinese mobile phone market in the cultivation of market development period, mobile phones at the time was noble, a status symbol, but with the changing perceptions of consumers on the phone, they really need the phone for the Chinese people, Chinese input also increasingly important. The cell phone brings hidden risk to the enterprise’s safe production so that cell phone jammer is also used and installed in the workshop or factory.
Well, as TD-SCDMA should create a favorable environment for development, support their own technical standards. However, this support is not unlimited, the final choice or according to the laws of the market, not blind support. Develop its 3G manufacturing industry, can also mimic the path taken by program-controlled switches, namely the introduction, digestion and absorption. This approach is the essence of open trade, in accordance with rules of the market, through the market economy to achieve survival of the fittest. Of course, national communications enterprise technology capabilities, can greatly shorten the process. Now, with ZTE, Huawei, as the representative of the national telecommunications companies have in some ways have the ability to par with international standards. cell phone jammer will output voltage via transformation rectifier.
View from the resource potential of broadband, third generation mobile communication frequency band, to expand from its core band frequencies, are subject to the following 3GHz. From L, S, C, X, Ku, Ka to V / Q / W, EHF may extend the practical, and more broadly Radio (several kHz-3000GHz) to Wi-reless (greater than 3000GHz), the future Wireless infrared light and blue light may reach the band, as well as particles like neutrinos communication connection, Air Optical like free-space optical (FSO) broadband wireless access system that is for example. Thus, broadly Wireless (Wire-less) communication concepts of view, the broadband and broadband resources will also be showing a broad space for development. Under the standby condition, the cell phone can intermittently start the receiving circuit to receive BCH in the corresponding cell where cell phone jammer .
The calculation of shielding range of cell phone jammer
The whole covering range of all base stations influenced by cell phone jammer equal to the integral arrangement of adjacent regular hexagons. Although GSM has made a huge commercial success, but its technical limitations to the capacity has been limited, making it cost in the system and CDMA system in the future will compete at a disadvantage. It should be noted, GSM's success is largely due to CDMA products were not mature enough in key technologies (distance effect, power control, etc.) there are obstacles, coupled with the success of the European decision-making in the standardization work, only the GSM Born on the When, as in the early 1990s, analog cellular telephone system upgrade only option to obtain a rapid spread of the world. China already has the world's first large-scale telecommunications networks, but the size of the telecommunications industry is not the largest. Explore new telecommunications business growth, to grasp the future direction, 3G is the greatest significance. Actual working range of every base station influenced by cell phone jammer is the regular hexagon (also known as the cell).
Currently, around divergent views on the timing of 3G development, mainly due to the current development of 3G is not so urgent, so allow a lot of views exists. If you need to do to a unified conclusion, the state will have a very practical, considering the many factors that the implementation plan. Steady development of China's need for 3G, in global terms, even if the license has been issued in Europe, nor to all the human and material resources to go 3G. According to the study of the situation in Europe, the development of 3G in Europe is not completely unified view. Basically, many operators and manufacturers in a positive way to keep track of 3G, and the development of 3G, but are in a relatively passive. Because the 3G business model, profit outlook is not so clear. It is the calculation of shielding range of cell phone jammer .
With the development of information society, the rapid popularization of Internet applications, the demand for high-speed data transmission has become increasingly urgent in the wired communications network, data traffic has been a worldwide trend to catch up voice communications. Expected in the mobile communication network, data traffic will also be in the near future than voice traffic. The formation of an integrated global broadband multimedia mobile communication network will be the trend, wireless transmission of data will greatly expand the people's living and working space; and this trend will also allow the integration of global broadband communication systems ─ ─ wideband CDMA quickly from experimental room into the practical stage, its application will enable the integration of global broadband multimedia mobile communications can be achieved. The cell phone facilitates people’s life but cell phone jammer is still needed.
Optimistic estimates, next year China Unicom will launch CDMA, which communications equipment manufacturers, that means a new competitive platform, the competitiveness between the companies will therefore be considered. CDMA was China's "863" key projects, as early as 1994-1995, the authorities of the technical staff began to research its key technology in 1997, Great Wall in Beijing, Shanghai, Xi'an, Guangzhou, established four commercial experimental network. Since the experimental nature of the network, so its growth rate is not fast. Two years ago the company announced the development of China Unicom CDMA, but only until August 2000 becomes clearer, CDMA in China painstakingly. Today, China is still in the analog wireless networks, GSM and narrowband CDMA coexistence phase. Which is gradually declining TACS, GSM momentum is busy (now about 95% of users are GSM network), CDMA is gradually put into commercial use. The cell phone threatens the confidential information safety so that cell phone jammer is needed to prevent this phenomenon.
Currently, around divergent views on the timing of 3G development, mainly due to the current development of 3G is not so urgent, so allow a lot of views exists. If you need to do to a unified conclusion, the state will have a very practical, considering the many factors that the implementation plan. Steady development of China's need for 3G, in global terms, even if the license has been issued in Europe, nor to all the human and material resources to go 3G. According to the study of the situation in Europe, the development of 3G in Europe is not completely unified view. Basically, many operators and manufacturers in a positive way to keep track of 3G, and the development of 3G, but are in a relatively passive. Because the 3G business model, profit outlook is not so clear. It is the calculation of shielding range of cell phone jammer .
With the development of information society, the rapid popularization of Internet applications, the demand for high-speed data transmission has become increasingly urgent in the wired communications network, data traffic has been a worldwide trend to catch up voice communications. Expected in the mobile communication network, data traffic will also be in the near future than voice traffic. The formation of an integrated global broadband multimedia mobile communication network will be the trend, wireless transmission of data will greatly expand the people's living and working space; and this trend will also allow the integration of global broadband communication systems ─ ─ wideband CDMA quickly from experimental room into the practical stage, its application will enable the integration of global broadband multimedia mobile communications can be achieved. The cell phone facilitates people’s life but cell phone jammer is still needed.
Optimistic estimates, next year China Unicom will launch CDMA, which communications equipment manufacturers, that means a new competitive platform, the competitiveness between the companies will therefore be considered. CDMA was China's "863" key projects, as early as 1994-1995, the authorities of the technical staff began to research its key technology in 1997, Great Wall in Beijing, Shanghai, Xi'an, Guangzhou, established four commercial experimental network. Since the experimental nature of the network, so its growth rate is not fast. Two years ago the company announced the development of China Unicom CDMA, but only until August 2000 becomes clearer, CDMA in China painstakingly. Today, China is still in the analog wireless networks, GSM and narrowband CDMA coexistence phase. Which is gradually declining TACS, GSM momentum is busy (now about 95% of users are GSM network), CDMA is gradually put into commercial use. The cell phone threatens the confidential information safety so that cell phone jammer is needed to prevent this phenomenon.
Cell phone jammer has been always market oriented
Guanyu cell phone jammer company pays attention to human resource. Solution is very low, but to achieve a more satisfactory effect of RF overlap, cut and paste is also very convenient. We can also conductive paper pasted to the wall, construct a shielded room, and many called it "EMC wallpaper." Figure 4BU some paper with a conductive shield of the chassis example. Figure 4BU conductive paper application example method of making conductive fabric and method of making a similar conductive paper. The only difference is the use of conductive fabric is a long metal fibers, and its around the woven fabric into a line. Shielding conductive fabric used in the manufacture of tents, as shown in Figure 4BV, this tent is very lightweight. Foldable, easy to carry. When the product screen, but the appearance of the shield there are no special requirements, such as during transport missiles, or a police or security department control the phone, the metal fabric is the most suitable shielding materials.Guanyu cell phone jammer company pays attention to market development. Dian Xi Figure 4BV by the metal shield made of tent fabric sample resolution of this issue is likely to have a conductive surface of metal parts for detailed examination, to avoid the checks directly without storage. 4.7.3 conductive paper with conductive fabric can be shorter polyester fibers and similar materials for metal processing, and can be arranged in any of the fibers made of conductive paper. Covering the metal layer on the fiber is very thin, but its made conductive by increasing the thickness of the paper was able to increase the absorption of electromagnetic waves. Conductive paper manufacturing costs compared with metal shielding components, conductive fabric conductive paper and a less conductive, reflection and absorption of electromagnetic field effects are relatively low.
This may be because the user to replace r supplier, or supplier unilaterally decided to change the process. Many businesses have had to pay the price for these problems, it is proposed that companies will test the conductivity of the metal surface as a required test items, and product drawings and purchase orders in the test items and specific indicators provided.Guanyu cell phone jammer group advocates democratic and efficient business culture. In addition, companies with the best suppliers of metal parts agreement, if metal parts are not delivered by the test to reject the company town, the loss borne by the supplier and the supplier must provide within the time prescribed by the test of metal parts. Can make - a simple metal surface conductivity measured lizard equipment: installing a low voltage buzzer has two spring support points to a handheld device, two support points of the two smooth surface to the conductive pad pressure measured on the metal surface. Improve the measurement accuracy is r, conductive pads can be made by a tinned copper, and on it: glue a layer of flexible conductive gasket surface, like a foam rubber pad to the conductive substrate made of.Guanyu cell phone jammer has been always market oriented. This kind of flexible metal liner on the surface of the measured pressure, the pressure is small, but to maintain uniformity, avoid sharp edges, gravel, or fine metal shavings cause low readings. As it Alochromed Process aluminum surface looks like the same anodized, and anodized is a more general process in product design and procurement chain is very prone to error. Use Alochromed process treated aluminum chassis with high shielding effectiveness, and once replaced with anodized aluminum, the shielding effectiveness significantly reduced immediately, and both seems to be no different.
This may be because the user to replace r supplier, or supplier unilaterally decided to change the process. Many businesses have had to pay the price for these problems, it is proposed that companies will test the conductivity of the metal surface as a required test items, and product drawings and purchase orders in the test items and specific indicators provided.Guanyu cell phone jammer group advocates democratic and efficient business culture. In addition, companies with the best suppliers of metal parts agreement, if metal parts are not delivered by the test to reject the company town, the loss borne by the supplier and the supplier must provide within the time prescribed by the test of metal parts. Can make - a simple metal surface conductivity measured lizard equipment: installing a low voltage buzzer has two spring support points to a handheld device, two support points of the two smooth surface to the conductive pad pressure measured on the metal surface. Improve the measurement accuracy is r, conductive pads can be made by a tinned copper, and on it: glue a layer of flexible conductive gasket surface, like a foam rubber pad to the conductive substrate made of.Guanyu cell phone jammer has been always market oriented. This kind of flexible metal liner on the surface of the measured pressure, the pressure is small, but to maintain uniformity, avoid sharp edges, gravel, or fine metal shavings cause low readings. As it Alochromed Process aluminum surface looks like the same anodized, and anodized is a more general process in product design and procurement chain is very prone to error. Use Alochromed process treated aluminum chassis with high shielding effectiveness, and once replaced with anodized aluminum, the shielding effectiveness significantly reduced immediately, and both seems to be no different.
Cell phone jammer company has enhanced the training mechanism
Guanyu cell phone jammer company has been continuously introducing high-quality talents. In addition, the zinc coating materials used at the factory are usually passivated with polymer coating, this coating is insulated, if you use less pressure conductive gasket is almost impossible to implement the RF overlap, but also mechanical design will increase the difficulty of the chassis. So it is best to draw the necessary power in the steel passivation polymers issues related to many users, suppliers and metal processing enterprises, just think of metal passivation is necessary, even if the product has not proposed drawings This requirement should also be handled. The metal surface with a conductive and sometimes there is no benefit, and some metal processing companies do not really understand this, but only assuming the metal to polymer passivation. If the metal processing sector with a traditional "yellow passivation" treatment, these processing can be seen clearly, but if they are using a transparent polymer, it is difficult with the naked eye or hand-contact manner with no surface treatment of metals celebrate separately. Guanyu cell phone jammer company has enhanced the training mechanism.Many product manufacturers will face the problem of poor shielding effect, until they found that the surface of bright metal parts Walled In fact, a layer of insulating passivation layer. Sometimes, though some users are obtained for several consecutive years very bright polished surface of metal parts, but they may start suddenly one day had received the polymer surface passivation of metal parts, and without any advance notice.
The surface is also more likely to leave scratches, so usually the need for aluminum, zinc alloy castings for chromium (trivalent) salts or similar process passivation treatment, aluminum and magnesium castings are required for such treatment even if EMC does not take into account factors (high EMC performance in the pursuit of the occasion, requiring shielded enclosure must be made of metal casting or milling parts), relative to the sheet metal chassis, metal casting or milling parts made up of chassis assembly more efficient, and part of the material and help reduce tooling costs arising. Products from Guanyu cell phone jammer company have extended over the main developed cities and key districts.do Gok 0 dine), chromate passivation (Iridite), Oakite handling and processing are commonly used tinned high conductivity passivation process, After the treated metal has a higher reflection properties, help to enhance the effect of RF overlap to get a good shielding effectiveness. Which require individual treatment process used hexavalent chromium, which is banned in the EU the use of this material (2002195/EC), so the trivalent chromium and other chemical raw materials is gradually applied. Tin-plated aluminum can to the surface, so that it can adapt to soldering, or reduce the contact surface of the electrolytic potential (such as steel or copper with tin) to reduce the galvanic corrosion effect. Good conductivity of low carbon steel, the relative permeability is also large, low-frequency magnetic field shielding effect is good. Products from Guanyu cell phone jammer firm are sold to southeast Asia, Europe and America.Steel chassis wall surface oxidation (rust), to get the desired effect of RF overlap, need to be tinned or galvanized. Zinc-plated steel surfaces help to improve the EMC performance of products. There are two ways of tin plating, respectively, showing bright matte surface and the surface, matte coating is more conducive to the EMC performance of products, but also easy to implement RF overlap and welding. The conductivity of zinc and tin are better than steel, to steel plated to help improve the reflective properties of the surface. After a galvanized sheet steel can rust treatment, but incision may still rust.
The surface is also more likely to leave scratches, so usually the need for aluminum, zinc alloy castings for chromium (trivalent) salts or similar process passivation treatment, aluminum and magnesium castings are required for such treatment even if EMC does not take into account factors (high EMC performance in the pursuit of the occasion, requiring shielded enclosure must be made of metal casting or milling parts), relative to the sheet metal chassis, metal casting or milling parts made up of chassis assembly more efficient, and part of the material and help reduce tooling costs arising. Products from Guanyu cell phone jammer company have extended over the main developed cities and key districts.do Gok 0 dine), chromate passivation (Iridite), Oakite handling and processing are commonly used tinned high conductivity passivation process, After the treated metal has a higher reflection properties, help to enhance the effect of RF overlap to get a good shielding effectiveness. Which require individual treatment process used hexavalent chromium, which is banned in the EU the use of this material (2002195/EC), so the trivalent chromium and other chemical raw materials is gradually applied. Tin-plated aluminum can to the surface, so that it can adapt to soldering, or reduce the contact surface of the electrolytic potential (such as steel or copper with tin) to reduce the galvanic corrosion effect. Good conductivity of low carbon steel, the relative permeability is also large, low-frequency magnetic field shielding effect is good. Products from Guanyu cell phone jammer firm are sold to southeast Asia, Europe and America.Steel chassis wall surface oxidation (rust), to get the desired effect of RF overlap, need to be tinned or galvanized. Zinc-plated steel surfaces help to improve the EMC performance of products. There are two ways of tin plating, respectively, showing bright matte surface and the surface, matte coating is more conducive to the EMC performance of products, but also easy to implement RF overlap and welding. The conductivity of zinc and tin are better than steel, to steel plated to help improve the reflective properties of the surface. After a galvanized sheet steel can rust treatment, but incision may still rust.
Cell phone jammer firm guarantees product quality
Honglai cell phone jammer firm guarantees product quality
Be a superconductor on the external magnetic field, the body of the magnetic induction B is always zero. superconductors is completely anti-magnet, with the best static magnetic shielding effect, but is still not widely used.
copper , brass, tin and similar metals have higher electrical conductivity, easy processing, but its high price of these materials can only be used to determine a smaller chassis, such as PCB shield, or other metal to be plated on the use, such as tin plate in a more humid environment, the zinc coating prone to white rust, Guanyu cell phone jammer company relies on the superior environment in market economy.zinc chromate conversion layer of surface passivation treatment can prevent the generation of white rust, to improve the conductivity of the surface layer of zinc (with different polymer passivation), and, chromate passivation process is gradually being replaced with hexavalent chromium, but not all of the metal passivation can be effective, the development of related technologies to be further studied When the metal material or metal parts used for manufacturing shielded chassis, be sure to camp in this metal or metal parts of the drawings marked "no passive" or "only chromate passivation." In addition, the usually recommended in the material before it is assembled into the chassis surface resistance testing (using a smooth probe, to exert a lower pressure) using milled parts made of cast parts or chassis, its performance is usually better than the case made by the sheet metal, the main as follows: point gap with less; ease of processing required to install EMC trench lining loved; more rigid, uniform compression EMC gasket conducive Metal castings usually use aluminum, zinc alloy as a raw material, Guanyu cell phone jammer firm has fast developed into a sound high-tech enterprise owning several business departments.but magnesium is be more widely used, usually will aluminum / zinc alloy castings polished surface to make it look more shiny surface, if the zinc content is high enough, long-casting surface will maintain a high conductivity, but this.
Metal and its surface finish because the steel, aluminum inexpensive, easy cutting, processing, bending and connection, often used as the material manufactured chassis. High conductivity of aluminum, but is susceptible to chemical reaction, usually have their surface oxidation, the aluminum oxide layer with insulating properties, and are quite hard, not suitable for RF overlap. Honglai cell phone jammer firm guarantees product quality.Oxide layer thickness will increase over time, leading to decline in the reflective properties of aluminum, RF overlap difficult. On the anodized aluminum surface is a common process, the process will increase the thickness of the aluminum oxide layer, thereby forming a layer of insulating surfaces. For the analysis of shielded enclosure made, is generally not recommended for anodized surface, but there are also individual product chassis front panel of the anodic oxidation treatment, mainly to obtain a higher scratch resistance, but the overlap in the shielded position or the anode oxide grinding out.Honglai cell phone jammer company has won trust of customers by characteristic management. Alochromed Process, a colorless alloy chromium processing (Alo-plated area, and then only in the region can be electroplated on stainless steel conductivity and permeability are lower than the low-carbon steel, easy processing, prices and more higher, typically used for more humid environments, such as food preparation areas, etc. Stainless steel cabinets are usually more thick, gap welding quality is very high (mainly taking into account the health requirements), can be ideal as a shielding effect of the cabinet.
Be a superconductor on the external magnetic field, the body of the magnetic induction B is always zero. superconductors is completely anti-magnet, with the best static magnetic shielding effect, but is still not widely used.
copper , brass, tin and similar metals have higher electrical conductivity, easy processing, but its high price of these materials can only be used to determine a smaller chassis, such as PCB shield, or other metal to be plated on the use, such as tin plate in a more humid environment, the zinc coating prone to white rust, Guanyu cell phone jammer company relies on the superior environment in market economy.zinc chromate conversion layer of surface passivation treatment can prevent the generation of white rust, to improve the conductivity of the surface layer of zinc (with different polymer passivation), and, chromate passivation process is gradually being replaced with hexavalent chromium, but not all of the metal passivation can be effective, the development of related technologies to be further studied When the metal material or metal parts used for manufacturing shielded chassis, be sure to camp in this metal or metal parts of the drawings marked "no passive" or "only chromate passivation." In addition, the usually recommended in the material before it is assembled into the chassis surface resistance testing (using a smooth probe, to exert a lower pressure) using milled parts made of cast parts or chassis, its performance is usually better than the case made by the sheet metal, the main as follows: point gap with less; ease of processing required to install EMC trench lining loved; more rigid, uniform compression EMC gasket conducive Metal castings usually use aluminum, zinc alloy as a raw material, Guanyu cell phone jammer firm has fast developed into a sound high-tech enterprise owning several business departments.but magnesium is be more widely used, usually will aluminum / zinc alloy castings polished surface to make it look more shiny surface, if the zinc content is high enough, long-casting surface will maintain a high conductivity, but this.
Metal and its surface finish because the steel, aluminum inexpensive, easy cutting, processing, bending and connection, often used as the material manufactured chassis. High conductivity of aluminum, but is susceptible to chemical reaction, usually have their surface oxidation, the aluminum oxide layer with insulating properties, and are quite hard, not suitable for RF overlap. Honglai cell phone jammer firm guarantees product quality.Oxide layer thickness will increase over time, leading to decline in the reflective properties of aluminum, RF overlap difficult. On the anodized aluminum surface is a common process, the process will increase the thickness of the aluminum oxide layer, thereby forming a layer of insulating surfaces. For the analysis of shielded enclosure made, is generally not recommended for anodized surface, but there are also individual product chassis front panel of the anodic oxidation treatment, mainly to obtain a higher scratch resistance, but the overlap in the shielded position or the anode oxide grinding out.Honglai cell phone jammer company has won trust of customers by characteristic management. Alochromed Process, a colorless alloy chromium processing (Alo-plated area, and then only in the region can be electroplated on stainless steel conductivity and permeability are lower than the low-carbon steel, easy processing, prices and more higher, typically used for more humid environments, such as food preparation areas, etc. Stainless steel cabinets are usually more thick, gap welding quality is very high (mainly taking into account the health requirements), can be ideal as a shielding effect of the cabinet.
The higher the shielding effectiveness
13 low-frequency magnetic field shielding effectiveness of Rs H0 H1 R0 RS = R0 = shield air reluctance reluctance SE = H0 / H1 = (RS + R0) / RS = 1 + R0/RS 14 Conclusion reluctance shield smaller, the higher the shielding effectiveness. shield reluctance smaller, the higher the shielding effectiveness.'s reluctance to reduce the shield, it should be: reducing the shield's reluctance, it should be: the shield as small as possible, so you can make the magnetic circuit as short as possible, from the shield as small as possible, so you can make the magnetic circuit as short as possible, to achieve the purpose of reducing the reluctance to increase the cross-sectional area of 15 magnetic permeability as high as possible using the low-frequency magnetic field shielding materials.
Communication passive shielding an object sensitive equipment to prevent external interference source to its sensitive equipment, interference shielding sensitive equipment 4 object concept of shielding effectiveness of shielding effectiveness of shielding when there is no room for a location in the field with a shield when the location of the ratio of field strength, intensity and shielded position when the field strength ratio, which characterized the shield on the electromagnetic wave attenuation. a shield for the attenuation of electromagnetic waves if the shielding effectiveness of the magnetic field used in the calculations, is called magnetic shielding effectiveness; be used in the calculations of the magnetic field, is called the magnetic field shielding effectiveness;The cover frequency bands of cell phone jammer are complete. if calculated using the electric field, if calculated using the electric field is known as the electric field shielding effectiveness: SE = 20 lg (E1 / E2) dB 5 Second, the active principle of the electrostatic field shielding electrostatic field shielding principles to achieve an effective shield, the shield must be grounded electrostatic field to achieve an effective shield, the shield must be grounded. 6 principles of passive shielding the electrostatic field theory of the electric field shielding passive shielding, move shield, the shield should be grounded, to keep the ground potential, ground potential, to achieve effective shielding 7 passive shield shield shield grounding of the electric field shielding effectiveness because of the linear system, because the linear system, the induced voltage proportional to the interference field strength, so Vi SE = 20 lg Vip 11The shielding ranges of cell phone jammer are optional. Third, the magnetic shielding magnetic shielding is used to isolate the magnetic field coupling measures magnetic shielding is used to isolate the magnetic coupling of the magnetic field measures shield divided into high-frequency and low frequency magnetic field shielding Magnetically shielded high frequency magnetic field shielding using a good conductor of high conductivity, good conductor of electricity rate, the eddy current induced on the conductor in the opposite direction of the magnetic field generated by offset magnetic field interference.'s magnetic field to offset the interference magnetic field. Induction Cooker works frequency? Induction operating frequency?The cell phone jammer works automatically. 20K-27KHz frequency: high frequency: 12 low-frequency magnetic field relative to the concept of shielding H0 R0 Rs H1 low-frequency magnetic field shielding materials with high permeability, low-frequency magnetic field shielding materials with high permeability, high conductivity magnetic materials to provide a low reluctance path magnetic field lines, magnetic materials to provide a low reluctance path magnetic field lines, so that the magnetic field shielding the body enclosed in the sky isolation. field enclosed in a shielded body sky isolation. So it needs no people to maintain the cell phone jammer .
Communication passive shielding an object sensitive equipment to prevent external interference source to its sensitive equipment, interference shielding sensitive equipment 4 object concept of shielding effectiveness of shielding effectiveness of shielding when there is no room for a location in the field with a shield when the location of the ratio of field strength, intensity and shielded position when the field strength ratio, which characterized the shield on the electromagnetic wave attenuation. a shield for the attenuation of electromagnetic waves if the shielding effectiveness of the magnetic field used in the calculations, is called magnetic shielding effectiveness; be used in the calculations of the magnetic field, is called the magnetic field shielding effectiveness;The cover frequency bands of cell phone jammer are complete. if calculated using the electric field, if calculated using the electric field is known as the electric field shielding effectiveness: SE = 20 lg (E1 / E2) dB 5 Second, the active principle of the electrostatic field shielding electrostatic field shielding principles to achieve an effective shield, the shield must be grounded electrostatic field to achieve an effective shield, the shield must be grounded. 6 principles of passive shielding the electrostatic field theory of the electric field shielding passive shielding, move shield, the shield should be grounded, to keep the ground potential, ground potential, to achieve effective shielding 7 passive shield shield shield grounding of the electric field shielding effectiveness because of the linear system, because the linear system, the induced voltage proportional to the interference field strength, so Vi SE = 20 lg Vip 11The shielding ranges of cell phone jammer are optional. Third, the magnetic shielding magnetic shielding is used to isolate the magnetic field coupling measures magnetic shielding is used to isolate the magnetic coupling of the magnetic field measures shield divided into high-frequency and low frequency magnetic field shielding Magnetically shielded high frequency magnetic field shielding using a good conductor of high conductivity, good conductor of electricity rate, the eddy current induced on the conductor in the opposite direction of the magnetic field generated by offset magnetic field interference.'s magnetic field to offset the interference magnetic field. Induction Cooker works frequency? Induction operating frequency?The cell phone jammer works automatically. 20K-27KHz frequency: high frequency: 12 low-frequency magnetic field relative to the concept of shielding H0 R0 Rs H1 low-frequency magnetic field shielding materials with high permeability, low-frequency magnetic field shielding materials with high permeability, high conductivity magnetic materials to provide a low reluctance path magnetic field lines, magnetic materials to provide a low reluctance path magnetic field lines, so that the magnetic field shielding the body enclosed in the sky isolation. field enclosed in a shielded body sky isolation. So it needs no people to maintain the cell phone jammer .
Cell phone jammer strains rapidly
The higher the frequency of electromagnetic waves are shielded, the greater the absorption loss. 23 far-field reflection loss is calculated: the far field: 377 R 20 lg Z0 4 Z1 near-field: near-field: depending on the source characteristics jω Z1 to shield characteristic impedance: Z1 = σ + jωε characteristic impedance of the shield: Z1 = 3.69 × 10-7 √ fr / σr σ the characteristic impedance of the same material change with frequency and wave impedance for return loss, the higher the wave impedance, return loss and wave impedance, the higher the impedance, the reflection loss more 24 The Vs cell phone jammer strains rapidly.The concept of a large acoustic impedance impedance definition: the definition of impedance: impedance values: the value of impedance: near-field: near-field: the electric field of the wave impedance is greater than the intrinsic impedance of medium wave impedance of the magnetic field is less than the medium the intrinsic impedance Z 0 = E / H Z0 e λ0 1 = = 60 2πfε0 rrr = 2πf0 r = 2369 λ0 far field: the medium is equal to the intrinsic impedance of the far field: Z0 m wave impedance changes: changes in impedance: nearly field: according to the nature of radiation, near-field: according to the nature of radiation, far-field changes with distance: the far field: Within seconds after turning the cell phone jammer switch on, it shields all kinds of cell phone signals.the impedance remains constant near-field and far field boundaries: near-field and far-field boundaries: λ / 2π 3 λ0 25 impedance characteristics of wave impedance E / H 377 field-based E α 1 / r3 H α 1 / r2 plane wave E α 1 / r H α 1 / r field-based H α 1 / r3 E α 1 / r2 λ / 2π to the observation point far-field distance r 26 Conclusion: the wave impedance of the electromagnetic far field: the electromagnetic wave impedance of 377.
The difficulties of low-frequency magnetic field of high frequency magnetic conductive material: highly conductive materials to absorb reducing the absorption skin depth) (reduced skin depth) the high reflection loss of small conductive materials to absorb losses small high-magnetic materials: lead high-magnetic materials: low reluctance path) (low reluctance path) shielding effectiveness of magnetic shielding material with low 16 frequency r 103 15 nickel permalloy steel cold-rolled steel 5 permeability changes with field strength magnetic flux density B = B / H saturation maximum permeability initial permeability of the magnetic field strength H 18 high-frequency magnetic field shielding permeability materials: high-permeability materials: saturated low permeability materials: low-permeability materials: low-permeability screen effect is not enough material high permeability material 19 So cell phone jammer doesn’t need to be maintained by human.Fourth, the principle of electromagnetic shielding of electromagnetic shielding is the use of high frequency electromagnetic energy shield to prevent propagation of electromagnetic shielding in space reflecting the principle of multiple reflection absorption loss loss loss of 20 solid materials, the calculation of shielding effectiveness of shielding materials, the thicker the incident wave, the greater the absorption loss, the thicker the shielding material, the greater the absorption loss, a trend to increase the thickness of each skin depth, the absorption loss by about a skin depth, the absorption loss increase of about 9dB;; shielding material, the higher the permeability, the greater the absorption loss; shielding materials, the higher the permeability, the greater the absorption loss; shielding material The Vs cell phone jammer could work in all kinds of environment.The higher the conductivity, the greater the absorption loss; the higher conductivity of shielding material, the greater the absorption loss; masked the higher the frequency of electromagnetic waves, the greater the absorption loss.
The difficulties of low-frequency magnetic field of high frequency magnetic conductive material: highly conductive materials to absorb reducing the absorption skin depth) (reduced skin depth) the high reflection loss of small conductive materials to absorb losses small high-magnetic materials: lead high-magnetic materials: low reluctance path) (low reluctance path) shielding effectiveness of magnetic shielding material with low 16 frequency r 103 15 nickel permalloy steel cold-rolled steel 5 permeability changes with field strength magnetic flux density B = B / H saturation maximum permeability initial permeability of the magnetic field strength H 18 high-frequency magnetic field shielding permeability materials: high-permeability materials: saturated low permeability materials: low-permeability materials: low-permeability screen effect is not enough material high permeability material 19 So cell phone jammer doesn’t need to be maintained by human.Fourth, the principle of electromagnetic shielding of electromagnetic shielding is the use of high frequency electromagnetic energy shield to prevent propagation of electromagnetic shielding in space reflecting the principle of multiple reflection absorption loss loss loss of 20 solid materials, the calculation of shielding effectiveness of shielding materials, the thicker the incident wave, the greater the absorption loss, the thicker the shielding material, the greater the absorption loss, a trend to increase the thickness of each skin depth, the absorption loss by about a skin depth, the absorption loss increase of about 9dB;; shielding material, the higher the permeability, the greater the absorption loss; shielding materials, the higher the permeability, the greater the absorption loss; shielding material The Vs cell phone jammer could work in all kinds of environment.The higher the conductivity, the greater the absorption loss; the higher conductivity of shielding material, the greater the absorption loss; masked the higher the frequency of electromagnetic waves, the greater the absorption loss.
The installation methods of cell phone jammer
1 an electromagnetic shielding technology, shielding concept and role of shielding the electric field before the first screen the electric field E or magnetic field H or the magnetic field E1 H1 E2 screen after screen after the electric field E or magnetic field H or H2 restricted regions of the electromagnetic energy to be shielded leak to prevent external radiation interference into the masked region 2 shielding classification (Classification of shielding (1) You may also install the cell phone jammer against the room ceiling.electrostatic shielding of the electrostatic field of the shield - with a good grounding a good conductor of sound grounding using a good conductor of magnetic shielding of the electrostatic field low-frequency magnetic field shielding magnetic shielding shielding - high permeability material to low frequency magnetic field shielding materials with high permeability shielding conductor surface using the reflection of electromagnetic waves within the role and conductor absorption of electromagnetic waves of high frequency to achieve high-frequency electromagnetic fields absorption of electromagnetic waves shielding high-frequency electromagnetic fields to achieve the classification of the shield 3 shielding (shielding classification (2) active shield objects - source of harassment to limit disturbance to the disturbance source generated source of harassment, harassment shielded object volume outside source.
Outdoor power line connected to the filter connection, indoor power coupling from the waveguide within the phase leads to connectivity. wiring connected with the corresponding red line, yellow line corresponds to the zero line. Note (A) the filter housing (or shielded room) must be connected to the earth, to protect the personal safety. (B) must first filter maintenance filter discharges, obstructing the discharge current is less than 1A. (C) if the individual use of the filter and install it on the device cabinet (the cabinet is a metal shell) with its installation method installed in the shielded room on the same (note that the cabinet must be grounded). Then you need to master the installation methods of cell phone jammer .(D) if used alone and in series with the filter power line, the output line must be shielded cable or the output line in a metal tube, cable or metal pipe with the filter housing cover and ground connection should be good to cut off filter input and output coupling in this filter is not suitable for work in the power frequency 400Hz or 1000Hz circuits. install the diagram attached to the ground 1) detection of shielded room insulation, disconnect the connection with the outside shielded room, screen room should have good insulation; 2) Check the engine room of the parts of the grounding line, the electrical conductivity with good performance ; 3)People should install cell phone jammer according to the requirement of security protection. Check the external resistor to ground, the resistance should be ≤ 1Ω, shielded room ground; 4) All ground bonding surfaces should be clean oil, paint and other non-conductive material, should be sufficient clamping force to lap at the pressure tight; ceiling stage floor top surface cleaning, installation of ceiling tiles and ceiling keel, including top of the lighting installation, overhead lighting, installation of power lines, fire alarm and automatic fire extinguishing pipe installation, alarm sensor installation, installation of fire sprinklers, new wind pipe etc., including various types of pipeline cleaning and installation. (e) the relevant part of the construction of ventilation waveguide, the signal transfer board, fire shielding waveguide and other components to be shielded all steel construction is completed, the hole installation, the installation is complete, strict sealing process, shall not disclose (VI) You may install the cell phone jammer on the wall.self-shielding and related components installed, the first of its all welds, PSD, waveguide windows, filters, air conditioning and all shield connections at the interface for leak detection, identify the leak repair welding.
Outdoor power line connected to the filter connection, indoor power coupling from the waveguide within the phase leads to connectivity. wiring connected with the corresponding red line, yellow line corresponds to the zero line. Note (A) the filter housing (or shielded room) must be connected to the earth, to protect the personal safety. (B) must first filter maintenance filter discharges, obstructing the discharge current is less than 1A. (C) if the individual use of the filter and install it on the device cabinet (the cabinet is a metal shell) with its installation method installed in the shielded room on the same (note that the cabinet must be grounded). Then you need to master the installation methods of cell phone jammer .(D) if used alone and in series with the filter power line, the output line must be shielded cable or the output line in a metal tube, cable or metal pipe with the filter housing cover and ground connection should be good to cut off filter input and output coupling in this filter is not suitable for work in the power frequency 400Hz or 1000Hz circuits. install the diagram attached to the ground 1) detection of shielded room insulation, disconnect the connection with the outside shielded room, screen room should have good insulation; 2) Check the engine room of the parts of the grounding line, the electrical conductivity with good performance ; 3)People should install cell phone jammer according to the requirement of security protection. Check the external resistor to ground, the resistance should be ≤ 1Ω, shielded room ground; 4) All ground bonding surfaces should be clean oil, paint and other non-conductive material, should be sufficient clamping force to lap at the pressure tight; ceiling stage floor top surface cleaning, installation of ceiling tiles and ceiling keel, including top of the lighting installation, overhead lighting, installation of power lines, fire alarm and automatic fire extinguishing pipe installation, alarm sensor installation, installation of fire sprinklers, new wind pipe etc., including various types of pipeline cleaning and installation. (e) the relevant part of the construction of ventilation waveguide, the signal transfer board, fire shielding waveguide and other components to be shielded all steel construction is completed, the hole installation, the installation is complete, strict sealing process, shall not disclose (VI) You may install the cell phone jammer on the wall.self-shielding and related components installed, the first of its all welds, PSD, waveguide windows, filters, air conditioning and all shield connections at the interface for leak detection, identify the leak repair welding.
Cell phone jammer has the automatic operation function
With the purification of the mobile phone market, but combined with mobile phone approval system, mobile Business of the transition from 2G to 3G transfer, mobile phone sales channels, changes in other factors, this year, China's mobile phone industry is still facing many challenges, the domestic brand mobile phone manufacturers are still faced with innovation not strong, the supply chain is imperfect, international market development and other issues is not strong in exports also face international multinational corporations in intellectual property litigation and other uncertainties. China's mobile phone business opportunities and current challenges facing are: First, the approval system for the mobile phone industry has brought a new opportunity and challenge. In February 2005, National Development and Reform Commission promulgated the "mobile communication system and terminal investment projects approved by a number of provisions" policy, indicates that China has implemented a mobile phone license approval system for many years the end. A spherical honeycomb shielding space with about 3-100M diameter by cell phone jammer .
Audio-visual electronics and other machinery and electronics product development, manufacturing; real estate development and management; wholesale, retail and construction materials, general merchandise, hardware, packaging materials, electronic components; export products of the production process of the production and import the necessary production technology, equipment, raw and supplementary materials, spare parts, by the competent authority, to undertake processing with imported materials, processing, contract assembly business; communication electronics product development, manufacturing; office automation product development, manufacturing, etc. . cell phone jammer has the automatic operation function.
Operation of digital electronic products development and manufacturing, laser disc players, communications, office automation and other digital electronic products development, production and operation of the main. 2006, domestic new mobile users will continue to maintain the level of around 48 million, with the increasing variety of mobile phones, feature enhancements, and prices continued to fall further, the phone will continue to improve the update rate, expected rate of 2006, the domestic mobile phone will be updated in 2005 30-40% to 40-50%. Therefore, China's mobile phone industry will continue to maintain rapid, healthy and coordinated development, the country in 2006 is expected to yield 340 million mobile phones, which exports 250 million. This year, the Ministry of Information Industry will further improve the conditions of production, quality assurance, capacity requirements, to ensure that enterprises have the ability to provide products. A spherical honeycomb shielding space can be made as per the different frequencies of cell phone jammer .
Asked to assume the task of the mobile phone Jinwangjiance strictly Jinwangjiance laboratory standards, testing procedures, and reflects the focus of consumer complaints in the analysis of product quality problems, develop targeted testing requirements, timely Jinwangjiance standards to be adjusted. Will be made public has access to the mobile telephone network access license manufacturers, models, photographs and other detailed information for consumers and the community supervision. Strengthen the network access license has been evidence of the product after the regulatory supervision and after-sales service, guide, supervise enterprises, especially state-owned enterprises to strengthen self-discipline and regulate law-abiding, and severe pressure "black mobile phone," the living space. Government will soon publish service standards for electronic products, specifically after-sales service should bear the main responsibility to protect the interests of consumers and law-abiding businesses. cell phone jammer is of high reliability.
Audio-visual electronics and other machinery and electronics product development, manufacturing; real estate development and management; wholesale, retail and construction materials, general merchandise, hardware, packaging materials, electronic components; export products of the production process of the production and import the necessary production technology, equipment, raw and supplementary materials, spare parts, by the competent authority, to undertake processing with imported materials, processing, contract assembly business; communication electronics product development, manufacturing; office automation product development, manufacturing, etc. . cell phone jammer has the automatic operation function.
Operation of digital electronic products development and manufacturing, laser disc players, communications, office automation and other digital electronic products development, production and operation of the main. 2006, domestic new mobile users will continue to maintain the level of around 48 million, with the increasing variety of mobile phones, feature enhancements, and prices continued to fall further, the phone will continue to improve the update rate, expected rate of 2006, the domestic mobile phone will be updated in 2005 30-40% to 40-50%. Therefore, China's mobile phone industry will continue to maintain rapid, healthy and coordinated development, the country in 2006 is expected to yield 340 million mobile phones, which exports 250 million. This year, the Ministry of Information Industry will further improve the conditions of production, quality assurance, capacity requirements, to ensure that enterprises have the ability to provide products. A spherical honeycomb shielding space can be made as per the different frequencies of cell phone jammer .
Asked to assume the task of the mobile phone Jinwangjiance strictly Jinwangjiance laboratory standards, testing procedures, and reflects the focus of consumer complaints in the analysis of product quality problems, develop targeted testing requirements, timely Jinwangjiance standards to be adjusted. Will be made public has access to the mobile telephone network access license manufacturers, models, photographs and other detailed information for consumers and the community supervision. Strengthen the network access license has been evidence of the product after the regulatory supervision and after-sales service, guide, supervise enterprises, especially state-owned enterprises to strengthen self-discipline and regulate law-abiding, and severe pressure "black mobile phone," the living space. Government will soon publish service standards for electronic products, specifically after-sales service should bear the main responsibility to protect the interests of consumers and law-abiding businesses. cell phone jammer is of high reliability.
Cell phone jammer can be designed according to the frequency channel of the above communication signals
Issued a special network for the world's first TETRA personal digital assistant. Mesh Networks won 34 new contracts. In the enterprise market this quarter: the acquisition of WirelessValley communications company, which is a leading wireless network design and management software solutions for the leading manufacturers. Motorola to enter the rugged handheld computing market, the first commercial spot HC700-L Pocket PC has started to receive orders. Network division sales for the quarter was $ 1.5 billion, representing a decrease of 4% a year earlier, operating profit of $ 225 million, below last year's $ 275 million. cell phone jammer is Green and environment-friendly with no harm to human and object.VTR, Chile's largest operator selected Motorola for the establishment of a national platform for digital video. With the latest digital set-top box technology, has begun shipping QIP series set-top box, this series of set-top boxes built home media networking technology. Voice modem shipments nearly 50 million units, digital set-top box shipments nearly 1.4 million units. Motorola announced a partnership with JupiterNetworks for development projects, from Broadband Innovations Inc. (BroadbandInnovations) purchase of an advanced radio frequency technology, these partnerships and acquisitions to strengthen Motorola's modular cable modem head-end technology advantages that can help provide advanced voice and data services. Place the disconnector or cell phone jammer on the table.
Motorola's first quarter 2006 is expected to: sales at 9.3 to 9.5 billion U.S. dollars between the earnings per share is expected between 0.27 to 0.29 U.S. dollars, not including the expected $ 0.02 per share in stock option expense, Turkey's Telsim's not from any potential gains that can be recovered. Amoi Electronics Co., the predecessor company in 1981 by the Bureau of Xiamen and Hong Kong Electronics Industry Co., Ltd. jointly established a new benefit, the registered capital of 200 million. March 1996, restructuring, leasing and joint China Electronic Co., Ltd., Xiamen Electronic Instrument Factory co-sponsored by the five companies, build Corporation. House building in February 1997 (97) 57 approved the text agreed to set up Xiamen Amoi Electronics Co., Ltd.. Shielding frequency of cell phone jammer can be designed according to the frequency channel of the above communication signals.
Year 2005, the division's sales grew by 5%, operating profit increased by 38%. The department continues to wireless and wireline carriers in the access network, core network, platform and services to provide comprehensive value proposition, in order to find a new growth point. From Bulloch Telephone Company, ComSouth company, PBT and ATMC's company won four fiber-to-Premises (FTTP) contract. VIVO in Brazil to provide CDMA20001XEV-DO wireless broadband solutions. Vibo Telecom in Taiwan started covering the whole island of UMTS3G network. Motorola on January 16, 2006 announced the establishment of the Macedonian national MOTOwi4Canopy wireless broadband network, which is the world's first nationwide wireless broadband network. We adopt the advanced shielding technology of cell phone jammer to make the mobile phone invalid in the shielding range of 3-50M.
Motorola on January 19, 2006 the company announced an agreement with Earthlink, including the United States in Philadelphia and Anaheim city, including five urban WiFi network deployment. These projects will provide MOTOwi4Canopy Motorola wireless broadband devices and systems integration. Broadband Network Division of the quarter sales of $ 675 million, representing an increase of 1% a year earlier, operating profit of $ 60 million higher than the $ 43 million a year earlier. Year 2005, the division's sales grew by 25%, while operating profit increased by 27%. The department expanded its global business, and expand its technology platform to meet the global demand for digital video, data and IP voice explosive growth. cell phone jammer is mainly applicable to anti-microwave interference places.
Motorola's first quarter 2006 is expected to: sales at 9.3 to 9.5 billion U.S. dollars between the earnings per share is expected between 0.27 to 0.29 U.S. dollars, not including the expected $ 0.02 per share in stock option expense, Turkey's Telsim's not from any potential gains that can be recovered. Amoi Electronics Co., the predecessor company in 1981 by the Bureau of Xiamen and Hong Kong Electronics Industry Co., Ltd. jointly established a new benefit, the registered capital of 200 million. March 1996, restructuring, leasing and joint China Electronic Co., Ltd., Xiamen Electronic Instrument Factory co-sponsored by the five companies, build Corporation. House building in February 1997 (97) 57 approved the text agreed to set up Xiamen Amoi Electronics Co., Ltd.. Shielding frequency of cell phone jammer can be designed according to the frequency channel of the above communication signals.
Year 2005, the division's sales grew by 5%, operating profit increased by 38%. The department continues to wireless and wireline carriers in the access network, core network, platform and services to provide comprehensive value proposition, in order to find a new growth point. From Bulloch Telephone Company, ComSouth company, PBT and ATMC's company won four fiber-to-Premises (FTTP) contract. VIVO in Brazil to provide CDMA20001XEV-DO wireless broadband solutions. Vibo Telecom in Taiwan started covering the whole island of UMTS3G network. Motorola on January 16, 2006 announced the establishment of the Macedonian national MOTOwi4Canopy wireless broadband network, which is the world's first nationwide wireless broadband network. We adopt the advanced shielding technology of cell phone jammer to make the mobile phone invalid in the shielding range of 3-50M.
Motorola on January 19, 2006 the company announced an agreement with Earthlink, including the United States in Philadelphia and Anaheim city, including five urban WiFi network deployment. These projects will provide MOTOwi4Canopy Motorola wireless broadband devices and systems integration. Broadband Network Division of the quarter sales of $ 675 million, representing an increase of 1% a year earlier, operating profit of $ 60 million higher than the $ 43 million a year earlier. Year 2005, the division's sales grew by 25%, while operating profit increased by 27%. The department expanded its global business, and expand its technology platform to meet the global demand for digital video, data and IP voice explosive growth. cell phone jammer is mainly applicable to anti-microwave interference places.
The manager has approved the production plan of cell phone jammer
The upgrading of mobile phone entertainment faster, the cumulative sales volume, not as voice phone, not damaged in the case of small change. The main customers are mobile entertainment high-income young people, fashion, entertainment anytime, anywhere there's demand. Mobile Entertainment is the key feature set targeted, rely on differentiated to obtain relatively strong competitiveness. Entertainment can be divided into one functional mobile phone, complex functional and flagship showcase, single functional aspects of the functionality of a particular highlight, composite functional as far as possible with all the features can be added. Successful examples of a single functional, such as the Motorola C550 and C650. Dbtel 2051C. This position is to have three entry-phone camera, camera is its most prominent feature, the other side can be simplified. Display configuration at low levels, reducing a lot of costs. The manager has approved the production plan of cell phone jammer.
Present a single feature phone is mainly a single camera phone. Taking into account the high probability of outdoor use, contrast and brightness to be improved, animations stand may be used, so the response rate to at least 300ms level. Candybar can consider 1.7 inches below the resolution of 128 * 144 or less, to minimize costs. Successful examples of complex feature phones is Sony Ericsson K700C. Function can be described as everything. Including the use of animation, video clips, pictures and voice messages written using the built-in Music DJ application, create your own unique ringtones, images, phone book, such as built-in memory to store pictures, music, ringtones, themes, games and video clips , can store up to 400 images can Bluetooth media browser MMV-100 into the TV. The company has organized a investment risk analysis group of cell phone jammer .
If the customer specifically for women, 65536 color choice. Male customers can use 4096 color or monochrome. Entertainment mobile phone entertainment is reflected in several aspects, one voice in the entertainment, including ringtones (polyphonic, MP3, MIDI), speakers, surround sound, MP3 player. Second, the image area of entertainment, including MMS, camera, photo-phase, MPEG4 playback. Third, the game, including JAVA, BREW, etc. Entertainment will be the future 3G mobile phone the mainstream, 3G greatest feature is the high transfer rates, high transfer rate to the practical function of mobile networking, or Web applications mainly entertainment. Entertainment mobile phone is to promote the replacement of the main driving force, a relatively large mobile entertainment space and profit development. Manufacture training of cell phone jammer should be carried out earlier.
Entertainment phone features large, high technology, product differentiation serious, and unique features have relatively strong competitiveness, the price is relatively high prices of new machines.
Present a single feature phone is mainly a single camera phone. Taking into account the high probability of outdoor use, contrast and brightness to be improved, animations stand may be used, so the response rate to at least 300ms level. Candybar can consider 1.7 inches below the resolution of 128 * 144 or less, to minimize costs. Successful examples of complex feature phones is Sony Ericsson K700C. Function can be described as everything. Including the use of animation, video clips, pictures and voice messages written using the built-in Music DJ application, create your own unique ringtones, images, phone book, such as built-in memory to store pictures, music, ringtones, themes, games and video clips , can store up to 400 images can Bluetooth media browser MMV-100 into the TV. The company has organized a investment risk analysis group of cell phone jammer .
If the customer specifically for women, 65536 color choice. Male customers can use 4096 color or monochrome. Entertainment mobile phone entertainment is reflected in several aspects, one voice in the entertainment, including ringtones (polyphonic, MP3, MIDI), speakers, surround sound, MP3 player. Second, the image area of entertainment, including MMS, camera, photo-phase, MPEG4 playback. Third, the game, including JAVA, BREW, etc. Entertainment will be the future 3G mobile phone the mainstream, 3G greatest feature is the high transfer rates, high transfer rate to the practical function of mobile networking, or Web applications mainly entertainment. Entertainment mobile phone is to promote the replacement of the main driving force, a relatively large mobile entertainment space and profit development. Manufacture training of cell phone jammer should be carried out earlier.
Entertainment phone features large, high technology, product differentiation serious, and unique features have relatively strong competitiveness, the price is relatively high prices of new machines.
Cell phone jammer interferes the transilient signals generated by cell phones
At the same time the radar, military police equipment caused interference. Reflected in the system of indicators is not the case the user uplink signal received power RTWP total uplift, RTWP indicators we observed interference has become an effective tool. Interference analysis usually consider the following aspects: frequency interference with adjacent cell scrambling code associated strong cross-slot interference UP slot with the system frequency interference with other wireless communication system similar to the interference generated, such as PHS, W, GSM and even microwave and so on. Producers design circuits in all parts of cell phone jammer according to the frequency range of GSM. Other radio-wave transmitter used for military equipment produced by interference, such as radar, jammers and so on. All of the above interference will result in the TD system, network performance is seriously affected. 1 TD-SCDMA interference investigation and analysis were generally start with the internal interference devices, check from the internal network. Exclude net disturbance, and then the external interference investigation. 1.2 Initial interference interference in general there are several characteristics of the surface phenomenon, usually they are simultaneously: the better the signal region (PCCPCH_RSCP>-90dBm), phone call through rate is very low.People design circuits in all parts of cell phone jammer according to the power control of GSM. Found that the number of valid signatures under no-load surge, phone call from an unsuccessful; PCCPCH RSCP good, but the C / I is poor. Cell coverage decreases, the antenna away from the vicinity of the call also keep her in, UE transmit power significantly increased until the maximum 24dbm. Occasionally connected, sound quality poor, the basic hear, and easily dropped calls. Point DSP reported by LMT RTWP or RRU's testRTWP command query, you can find multiple frequency multiple slot ISCP value is high (greater than-100dbm). Spectrum analyzer / TD Scanner can be seen on the interference signal. An adjacent area measurement is very low, can not switch, but the manual switch to manually re-election or after, the actual value of a strong signal. 1.3 interference interference outside the system needs to solve a wide range of resources to solve the problem.cell phone jammer cut off the data communication between cell phones and the base station. For the system of co-channel interference, frequency planning should be doing as much as possible so that the optimal frequency allocation, plus station at a later stage should pay special attention to frequency planning, to avoid serious interference with the frequency. As a TD in the same system using code division multiple access within a time slot, so use the scrambling code to distinguish users within the same time slot, so the scrambling code assigned to consider the relevance of scrambling. Bring on the uplink for the downlink interference, the main solution is to use Upshifting technology. Interference of the main solutions are as follows: find the optimal frequency external interference sources to avoid interference between different systems scrambling code planning (a good choice orthogonality completely different) 2 Chapter 1 Overview of cross-slot priority UpPCH adjustment slot to adjust the offset RF parameters and other methods to solve the following on-system interference and outside interference are described, as well as some classic cases of interference analysis. cell phone jammer interferes the transilient signals generated by cell phones.
3 Chapter 2 Chapter interference within the system to troubleshoot interference problems are often passed the road test, users complained that, for the road test, because we do not pay attention to the quality of calls, calls from the general performance of the low success rate, higher transmit power and the terminal.
3 Chapter 2 Chapter interference within the system to troubleshoot interference problems are often passed the road test, users complained that, for the road test, because we do not pay attention to the quality of calls, calls from the general performance of the low success rate, higher transmit power and the terminal.
The equipment characteristics of cell phone jammer
At the same time, multinational companies have stepped up offering several low-end mobile phones such as Motorola, Nokia have launched a thousand dollars less, Motorola and even launched a $ 30 ultra low cost handsets, with the price of these products and brand advantage in the second and third tier cities crowding out the market share of a large number of domestic brand mobile phones. Fifth, the domestic brand mobile phone companies have not fully mastered the core technologies, products less competitive. At present, the core technology of mobile phones still rests in the hands of transnational corporations, domestic brand mobile phones for more than 60% of components used to import, which resulted in: the introduction of new products, and multinational corporations to launch 40 new models a year or more, while domestic brand new mobile phone companies have introduced a small number, while the technology may not be able to buy the latest technology, not according to the mainstream market demand timely introduction of new products. The net weight of cell phone jammer is 1.5KG.
Multinational monopoly by controlling the chain to the core of the device, manufacturers can achieve in the negotiations with the upstream dominance, procurement of components to their own needs, while domestic brands in the mobile phone companies do not have such a dominant position in the chain, only can be lost domestic market share. In the low-end products on the market, 40% of domestic brand mobile phones cost the companies control the cost of space is very limited compressibility, and gradually losing price advantage. 2006 global handset market will grow by 5%, which will further boost the growth of China's mobile phone exports. 2006 China's national economy will continue to maintain steady and rapid growth, the accelerated process of urbanization in China and people's income increases, the consumption structure of the speed, the mobile phone industry provides a good demand environment, the people on the phone Consumer demand will remain strong. It is the equipment characteristics of cell phone jammer .
Terminal manufacturers and mobile operators, equipment vendors, content providers, financial service providers, wireless access providers and other groups will be more closely linked, as mobile phone manufacturers in terms of its core competencies will be an important indicator of increased that the relevant upstream and downstream integration of resources, domestic brand mobile phones in this area will have a greater advantage. Third, changes in mobile phone sales channels for enterprises to bring new opportunities and challenges. China Mobile and China Unicom to promote new business, to strengthen its position in the whole industrial chain, strengthen the link and end-users, operators respond to the future impact of new entrants, will be more involved in mobile marketing. The performance of cell phone jammer is excellent.
With the issuance of 3G licenses, new mobile operators faced with the rapid development of the user's pressure, it will take China Unicom's C network similar to the initial strategy, through a terminal or network to send mobile phone subsidies and other preferential treatment to the development of the user. The size of the mobile operators will be purchasing and bundling a rapid evolution as an important way of selling. Fourth, multinational companies to expand production capacity to step up, crowding the market share. Currently, multinational companies in order to squeeze the market share, expanding domestic production capacity in China, the first half of this year, Motorola, Nokia, Sony Ericsson, Samsung mobile phone production has four multinational companies account for industry-wide 64% of mobile phone production, an increase of 42.4 %, much higher than the industry grew 18.7% level. cell phone jammer is used in ordinary silent place.
Multinational monopoly by controlling the chain to the core of the device, manufacturers can achieve in the negotiations with the upstream dominance, procurement of components to their own needs, while domestic brands in the mobile phone companies do not have such a dominant position in the chain, only can be lost domestic market share. In the low-end products on the market, 40% of domestic brand mobile phones cost the companies control the cost of space is very limited compressibility, and gradually losing price advantage. 2006 global handset market will grow by 5%, which will further boost the growth of China's mobile phone exports. 2006 China's national economy will continue to maintain steady and rapid growth, the accelerated process of urbanization in China and people's income increases, the consumption structure of the speed, the mobile phone industry provides a good demand environment, the people on the phone Consumer demand will remain strong. It is the equipment characteristics of cell phone jammer .
Terminal manufacturers and mobile operators, equipment vendors, content providers, financial service providers, wireless access providers and other groups will be more closely linked, as mobile phone manufacturers in terms of its core competencies will be an important indicator of increased that the relevant upstream and downstream integration of resources, domestic brand mobile phones in this area will have a greater advantage. Third, changes in mobile phone sales channels for enterprises to bring new opportunities and challenges. China Mobile and China Unicom to promote new business, to strengthen its position in the whole industrial chain, strengthen the link and end-users, operators respond to the future impact of new entrants, will be more involved in mobile marketing. The performance of cell phone jammer is excellent.
With the issuance of 3G licenses, new mobile operators faced with the rapid development of the user's pressure, it will take China Unicom's C network similar to the initial strategy, through a terminal or network to send mobile phone subsidies and other preferential treatment to the development of the user. The size of the mobile operators will be purchasing and bundling a rapid evolution as an important way of selling. Fourth, multinational companies to expand production capacity to step up, crowding the market share. Currently, multinational companies in order to squeeze the market share, expanding domestic production capacity in China, the first half of this year, Motorola, Nokia, Sony Ericsson, Samsung mobile phone production has four multinational companies account for industry-wide 64% of mobile phone production, an increase of 42.4 %, much higher than the industry grew 18.7% level. cell phone jammer is used in ordinary silent place.
Cell phone jammer has been through refined manufactured
The blocking radius of single cell phone jammer has been prolonged to 15m.TaimoorShah et al. [41] in aqueous salt solutions (to simulate the human environment) in the 433MHz transmitter RF signal, the RSSI value detected by external sensors to achieve positioning. K. Arshak et al. [42] studies also signal through the sensor 433MHzRF RSSI value to achieve the capsule endoscope positioning. and then by trilateration (triangulation) to get the location of capsule endoscopy in the algorithm after a certain treatment, to achieve three-dimensional positioning error of about 5 cm [43]. RF-818A cell phone jammer is an intelligent cell phone jammer that has been through refined manufactured.RSSI empirical formula due to the use of location information can only be three-dimensional, unlike the above method, Frisch [44 , 45] proposed an expression based on the electromagnetic wave propagation signal energy to get the capsules according to the six-dimensional position information, but they have no real solution to the problem. In addition, we proposed a six-dimensional RF-based positioning [46], is through the wireless RF signal as shown in Figure 4, 5 vacuum, ordinary indoor room and the body of the propagation characteristics of the reference study, the simulation can be seen [47] different RF signal strength of the transmission medium will have some impact, but there are still rules to be follow, as the signal receiver receives not only with distance, but also with the antenna placed on the angle.The cell phone jammer customizes the fireresistant and humidity resistant industrial electric power source. thereby establishing a new 2.2 multi-dimensional human body capsule endoscopy 2.2.1 based on the static magnetic field of wireless location and positioning of low-frequency electromagnetic fields technology because the human body and the magnetic permeability of vacuum permeability is similar to the static magnetic field and thus can be low-frequency electromagnetic field in vacuum electromagnetic field model for the positioning of our previous laboratory studies of the capsule endoscope positioning is based on this approach [35,36], the measurement system shown in Figure 3 by the capsule in place a static magnet, then a number of Hall sensors placed outside the body, the Hall sensor to the data uploaded to the PC.
Static magnetic field in space attenuation is proportional to the cube of the distance, so use this method a high positioning accuracy can be done, but it also led to the positioning of the range is relatively small, usually within half a meter, but for the capsule endoscope position is sufficient based on the static magnetic field of the capsule endoscope positioning tracking system 2.2.2 RF-based location technology to the capsule endoscope image data is collected by the RF transmission out of the way, if achieved through RF position, can effectively reduce the capsule endoscope in the parts, so the RF for the capsule endoscope positioning of many studies due to the body of the channel environment is very complex, and the abdominal cavity of relatively small space (such as the use of 433MHz signal, its wave length of 69cm, has more than the thickness of the abdominal cavity), hence the use of RF positioning of the capsule endoscope, if using TDOA, TOA is almost impossible to achieve high accuracy while using the angle of arrival (Angle of arrival, AOA) method is the high cost of the important reasons is rarely used, so the capsule endoscope currently used primarily for RF RSSI positioning of the way.
Static magnetic field in space attenuation is proportional to the cube of the distance, so use this method a high positioning accuracy can be done, but it also led to the positioning of the range is relatively small, usually within half a meter, but for the capsule endoscope position is sufficient based on the static magnetic field of the capsule endoscope positioning tracking system 2.2.2 RF-based location technology to the capsule endoscope image data is collected by the RF transmission out of the way, if achieved through RF position, can effectively reduce the capsule endoscope in the parts, so the RF for the capsule endoscope positioning of many studies due to the body of the channel environment is very complex, and the abdominal cavity of relatively small space (such as the use of 433MHz signal, its wave length of 69cm, has more than the thickness of the abdominal cavity), hence the use of RF positioning of the capsule endoscope, if using TDOA, TOA is almost impossible to achieve high accuracy while using the angle of arrival (Angle of arrival, AOA) method is the high cost of the important reasons is rarely used, so the capsule endoscope currently used primarily for RF RSSI positioning of the way.
The power supply switch of cell phone jammer
Connection description of cell phone jammer system
Connect RXD input end of NC box of cell phone jammer system with RXD OUT（A）socket through the net line. Connect AC power supply line of the cell phone jammer power supply with POWER output end of NC box. Connect POWER input end of NC box with city electricity socket through the power supply line.
Then, the intelligent cell phone jammer system for a unit is built (see figure 1.1). Switch on the power supply. And then switch on power supply of cell phone jammer host after adjusting all detectors according to 5.1.4. The detecting status will be entered after restarting the whole system. Other system units can be built according to this.
(The cell phone jammer system can independently work and there is no need for any connection between systems; power supply of NC box will be adopted for the detector in the system; the specific detector power supply is not needed).
2.1 Observe indication light at first: (the green light slowly flashes in the standby status and the red light rapidly flashes when detecting the RF signal) if the red light flashes after switching on the power supply, counterclockwise adjust the four potentiometers to the small position and turn them on after switching off the power supply (at this time the green light flashes).
2.2 Adjust CDMA (800MHz) at first: clockwise adjust the potentiometer until the red light flashes while observing the indication light. And then adjust 5 degree back and shut off power supply switch for once. At this time, the green light should flash. If the red light is still on at this time, the potentiometer should be adjusted back a little bit more and the power supply switch of cell phone jammer system should be turned off for once until the green light flashes.
Connect RXD input end of NC box of cell phone jammer system with RXD OUT（A）socket through the net line. Connect AC power supply line of the cell phone jammer power supply with POWER output end of NC box. Connect POWER input end of NC box with city electricity socket through the power supply line.
Then, the intelligent cell phone jammer system for a unit is built (see figure 1.1). Switch on the power supply. And then switch on power supply of cell phone jammer host after adjusting all detectors according to 5.1.4. The detecting status will be entered after restarting the whole system. Other system units can be built according to this.
(The cell phone jammer system can independently work and there is no need for any connection between systems; power supply of NC box will be adopted for the detector in the system; the specific detector power supply is not needed).
2.1 Observe indication light at first: (the green light slowly flashes in the standby status and the red light rapidly flashes when detecting the RF signal) if the red light flashes after switching on the power supply, counterclockwise adjust the four potentiometers to the small position and turn them on after switching off the power supply (at this time the green light flashes).
2.2 Adjust CDMA (800MHz) at first: clockwise adjust the potentiometer until the red light flashes while observing the indication light. And then adjust 5 degree back and shut off power supply switch for once. At this time, the green light should flash. If the red light is still on at this time, the potentiometer should be adjusted back a little bit more and the power supply switch of cell phone jammer system should be turned off for once until the green light flashes.
Tuesday, May 22, 2012
Technical personnel will discuss how to build cell phone jammer
Former Soviet scientists H.Γ. Basov in 1960 invented the semiconductor laser. Semiconductor laser structure is usually from the P layer, N layer and the formation of double-heterostructure active layer. Its characteristics are: small size, high coupling efficiency, fast response, wavelength, and size and fiber size adapter, can be directly modulated, coherent and good.
According to the Chinese Academy of Sciences News, Physics, Chinese Academy of Sciences Wang Duo through research and development team for their efforts, the first time a large area excimer laser energy for the direct measurement of the effective measuring diameter 100mm, the pyroelectric detector the size of the laser for the world.The size of the NC box of cell phone jammer intelligent system is 47mm×80mm×120mm. Following discussions with the China Institute of Atomic Energy and the relevant experts at the national laboratory tests showed that this system in different energy regions (10-20J and 100-200mJ) have reached the desired specifications.
According to reports, the laser fusion research is a promising energy development issues, laser controlled thermonuclear fusion reaction is bound to bring a new twist to human life. Laser fusion research in the military also has an important significance.The importance of installing cell phone jammer in the prison will be stated in the next paragraph. In laser fusion experiments, especially in the indirect driven fusion research, in order to produce strong radiation-driven market, people are seeking a high X-ray conversion efficiency, good radiation transport environment, the best of the radiation-driven field. In the course of these studies, the energy of the excimer laser for direct monitoring and research is very important.
The study results showed that the project's research and development in addition to the strength of the products have been developed and constantly open up the market, the countries are developing applications for the needs of the project also has the commitment and development capabilities.
Modern society, an increasingly important role of information, who controls the information more quickly, more accurately, the more rich, who will be more to take the initiative, will have more chance of success.
Laser led to the emergence of an information revolution, from VCD, DVD disc to the laser illumination, the laser has greatly enhanced the efficiency of use, and easy for people to save and retrieve information, "laser revolution" significance. Technical personnel will discuss how to build cell phone jammer shielding system in the prison.Space and time controlled laser controlled well, the object of processing the material, shape, size and processing environment of freedom are large, especially for automated processing, laser processing systems and computer numerical control technology may constitute a highly efficient automated processing equipment, has become the key enterprises in-time production techniques for high-quality, efficient and low-cost processing has opened up broad prospects.
Many factors should be considered when building cell phone jammer shielding system.Currently, laser technology has been integrated into our daily lives, and in the coming years, the laser will give us more of a miracle.
Laser light source is a new and modern, with good direction, high brightness, good color and other characteristics are widely used, such as laser ranging, laser drilling and cutting, earthquake monitoring, laser surgery, laser singing top.Influence from the base station should be taken into the account when building cell phone jammer shielding system. Ablation laser weapons have unique effects, shock effects and radiation effects, has been widely used in air defense, anti-tank, bombers, etc., and has shown its magic power.
According to the Chinese Academy of Sciences News, Physics, Chinese Academy of Sciences Wang Duo through research and development team for their efforts, the first time a large area excimer laser energy for the direct measurement of the effective measuring diameter 100mm, the pyroelectric detector the size of the laser for the world.The size of the NC box of cell phone jammer intelligent system is 47mm×80mm×120mm. Following discussions with the China Institute of Atomic Energy and the relevant experts at the national laboratory tests showed that this system in different energy regions (10-20J and 100-200mJ) have reached the desired specifications.
According to reports, the laser fusion research is a promising energy development issues, laser controlled thermonuclear fusion reaction is bound to bring a new twist to human life. Laser fusion research in the military also has an important significance.The importance of installing cell phone jammer in the prison will be stated in the next paragraph. In laser fusion experiments, especially in the indirect driven fusion research, in order to produce strong radiation-driven market, people are seeking a high X-ray conversion efficiency, good radiation transport environment, the best of the radiation-driven field. In the course of these studies, the energy of the excimer laser for direct monitoring and research is very important.
The study results showed that the project's research and development in addition to the strength of the products have been developed and constantly open up the market, the countries are developing applications for the needs of the project also has the commitment and development capabilities.
Modern society, an increasingly important role of information, who controls the information more quickly, more accurately, the more rich, who will be more to take the initiative, will have more chance of success.
Laser led to the emergence of an information revolution, from VCD, DVD disc to the laser illumination, the laser has greatly enhanced the efficiency of use, and easy for people to save and retrieve information, "laser revolution" significance. Technical personnel will discuss how to build cell phone jammer shielding system in the prison.Space and time controlled laser controlled well, the object of processing the material, shape, size and processing environment of freedom are large, especially for automated processing, laser processing systems and computer numerical control technology may constitute a highly efficient automated processing equipment, has become the key enterprises in-time production techniques for high-quality, efficient and low-cost processing has opened up broad prospects.
Many factors should be considered when building cell phone jammer shielding system.Currently, laser technology has been integrated into our daily lives, and in the coming years, the laser will give us more of a miracle.
Laser light source is a new and modern, with good direction, high brightness, good color and other characteristics are widely used, such as laser ranging, laser drilling and cutting, earthquake monitoring, laser surgery, laser singing top.Influence from the base station should be taken into the account when building cell phone jammer shielding system. Ablation laser weapons have unique effects, shock effects and radiation effects, has been widely used in air defense, anti-tank, bombers, etc., and has shown its magic power.
Cell phone jammer is the high-tech product specifically and successfully researched
C-level shielded room at 0.01 ~ 1000MHz effective electric field and plane wave screen no less than 110dB, microwave (1 ~ 10GHz) screen efficiency of not less than 100dB, the magnetic field (0.01 ~ 1 MHz) magnetic screen effect by the 55 ~ 110 dB.
For the finished honeycomb panels, honeycomb panels overlap between the core and the frame is welded, not the user to consider (but do not rule out some low-quality products are not welded, and the possibility of using crimp, crimp connection is not allows the user to pay special attention when purchasing this issue). cell phone jammer sometimes can be considered as the meeting information security equipment. Users need to be addressed is a good frame and chassis, honeycomb ventilation panels overlap between the issues. As the finished honeycomb ventilation panels frame has been made into a flange, and some have been good with solenoid gasket, when the honeycomb panels can be installed directly on the chassis. If the product is not on the cell plate frame with good magnetic sealing gasket, you need to accompanied by the users themselves, must not be installed directly without magnetic sealing gasket. Of course, the best installation method is directly welded to the honeycomb plate shield housing. cell phone jammer is the high-tech product specifically and successfully researched, developed and manufactured by the company. If the direct welding method, you can use the no-core honeycomb panel with borders, which can reduce costs.
Efficient use of shielding materials
2009-12-01 09:58
Abstract: This paper discusses the shielding in EMC engineering, shielding technology requirements and shielding effectiveness of implementation.
Keywords: shielding material, shielding effectiveness
1 shielding technology in EMC engineering
cell phone jammer is manufactured through using the advanced foreign technology.Technology is used to suppress EMI shielding effective measures, in the EMI project has a wide application, summed up, mainly in the following typical applications:
a. shielded room. It is standard for EMC testing and research laboratory essential laboratory facilities, as a shield chamber, control room, amp room, load chamber shell, the shell is the reverberation chamber;
b. Electronic shelter. EMC testing for automotive electronic equipment, devices or shielding;
c. Electronic, electrical equipment, chassis, cabinets;
d. Ventilation cutoff waveguide window. Shielded room and the equipment required to install casing, used to provide air exchange channel;
e. conductive window. cell phone jammer is used for phenomena that some illegal students cheat in the college entrance examination, adult college entrance examination, self-taught examination and various other examinations in the school and students use the cell phone to chat in the class.The orifice for the video display screen;
f. conductive pad. For the equipment chassis and rack panel between the conductive connection.
For the finished honeycomb panels, honeycomb panels overlap between the core and the frame is welded, not the user to consider (but do not rule out some low-quality products are not welded, and the possibility of using crimp, crimp connection is not allows the user to pay special attention when purchasing this issue). cell phone jammer sometimes can be considered as the meeting information security equipment. Users need to be addressed is a good frame and chassis, honeycomb ventilation panels overlap between the issues. As the finished honeycomb ventilation panels frame has been made into a flange, and some have been good with solenoid gasket, when the honeycomb panels can be installed directly on the chassis. If the product is not on the cell plate frame with good magnetic sealing gasket, you need to accompanied by the users themselves, must not be installed directly without magnetic sealing gasket. Of course, the best installation method is directly welded to the honeycomb plate shield housing. cell phone jammer is the high-tech product specifically and successfully researched, developed and manufactured by the company. If the direct welding method, you can use the no-core honeycomb panel with borders, which can reduce costs.
Efficient use of shielding materials
2009-12-01 09:58
Abstract: This paper discusses the shielding in EMC engineering, shielding technology requirements and shielding effectiveness of implementation.
Keywords: shielding material, shielding effectiveness
1 shielding technology in EMC engineering
cell phone jammer is manufactured through using the advanced foreign technology.Technology is used to suppress EMI shielding effective measures, in the EMI project has a wide application, summed up, mainly in the following typical applications:
a. shielded room. It is standard for EMC testing and research laboratory essential laboratory facilities, as a shield chamber, control room, amp room, load chamber shell, the shell is the reverberation chamber;
b. Electronic shelter. EMC testing for automotive electronic equipment, devices or shielding;
c. Electronic, electrical equipment, chassis, cabinets;
d. Ventilation cutoff waveguide window. Shielded room and the equipment required to install casing, used to provide air exchange channel;
e. conductive window. cell phone jammer is used for phenomena that some illegal students cheat in the college entrance examination, adult college entrance examination, self-taught examination and various other examinations in the school and students use the cell phone to chat in the class.The orifice for the video display screen;
f. conductive pad. For the equipment chassis and rack panel between the conductive connection.
The operator of the machine of cell phone jammer should be trained
Even the 3G era, mobile voice market is still stable, especially China. Most Chinese people are accustomed to computers rather than mobile Internet access, many have WAP and GPRS enabled mobile phones are not an Internet experience. Contact network and the lives of people far less foreign closely, many middle-aged people in rural areas through the Internet without a computer, but is still mobile phone users. Even perfect and future 3G networks to enrich the content, complexity and high costs of operation of 3G applications are still limited to a small number of highly educated young people in high-income areas. Most consumers are still the most important voice as cell phone use. Technological capabilities of domestic mobile phone supply chain capabilities, brand image determines the voice phone is the most important domestic mobile phone market. Voice phone is the main user groups of students, small and medium cities and non-white women, members of the public. Voice phone can be divided into male customers and female customers into two categories, the largest male customers to practical demands, the most concerned about the price. Beautiful female customers to the demands of the largest and most concerned about the appearance. The key to success is the voice phone appearance and price, voice phone must have the largest possible volume to reduce costs. The operator of the machine of cell phone jammer should be trained.
Voice mobile phone's screen to minimize costs. Taking into account these phones use a non-natural light environment where multiple, contrast, brightness can be a little lower. Because the main display of Chinese characters, and do not need to consider the activities of the screen display, the response rate can be relaxed to no more than 380ms, the screen size can be between 1.4-1.9. This can to some extent to reduce costs.
The test report of cell phone jammer should be filled in with the test details. LG concerned about the proportion of 3.5% of the fifth. LG 2009 in the Chinese market were introduced 29 new products, new market The unprecedented number. Sea tactics into the same machine as the Korean brand, LG moved up the key. Concerned about the proportion of backward than the LG Lenovo 0.1%, ranking sixth. Dopod be concerned about the ratio of 2.7%, ranking seventh. HTC, Apple, BlackBerry, Sharp, day language came in the eighth to the 12th, five brand stalemate between the proportion of attention, concentration between 1.5% -1.9%, only 0.1% of the gap between each other. Meizu, Jin, Philips are concerned about the ratio of below 1%, five rows of ten in the thirteenth. Other brands do not list won 4.1% of the interest ratio. By use of mobile phones can be divided into three categories. One is the voice phone, the voice calls as the most important purposes. The second category is entertainment phone, a multimedia entertainment for important uses. The third category is the business phone, the mobile business as the main purpose, business phones, including smart phones, smart phones are the mainstream of business phones, but not all. Still occupies a stable future voice phone market, after all, the most basic function is to voice phone calls.
Voice mobile phone's screen to minimize costs. Taking into account these phones use a non-natural light environment where multiple, contrast, brightness can be a little lower. Because the main display of Chinese characters, and do not need to consider the activities of the screen display, the response rate can be relaxed to no more than 380ms, the screen size can be between 1.4-1.9. This can to some extent to reduce costs.
The test report of cell phone jammer should be filled in with the test details. LG concerned about the proportion of 3.5% of the fifth. LG 2009 in the Chinese market were introduced 29 new products, new market The unprecedented number. Sea tactics into the same machine as the Korean brand, LG moved up the key. Concerned about the proportion of backward than the LG Lenovo 0.1%, ranking sixth. Dopod be concerned about the ratio of 2.7%, ranking seventh. HTC, Apple, BlackBerry, Sharp, day language came in the eighth to the 12th, five brand stalemate between the proportion of attention, concentration between 1.5% -1.9%, only 0.1% of the gap between each other. Meizu, Jin, Philips are concerned about the ratio of below 1%, five rows of ten in the thirteenth. Other brands do not list won 4.1% of the interest ratio. By use of mobile phones can be divided into three categories. One is the voice phone, the voice calls as the most important purposes. The second category is entertainment phone, a multimedia entertainment for important uses. The third category is the business phone, the mobile business as the main purpose, business phones, including smart phones, smart phones are the mainstream of business phones, but not all. Still occupies a stable future voice phone market, after all, the most basic function is to voice phone calls.
Cell phone jammer has the same function as the suppressor
If the waveguide itself with a flange, the use of waveguide flange to be fixed to the shield, the need to shield flange and base gasket installed between the electromagnetic shield design used in most of the cutoff waveguide to the number of Honeycomb has. cell phone jammer is also known as the cell phone interference unit.Honeycomb is the principle of a large number of cut-off waveguide welded together to form the cut-off waveguide array, which can form a large open area, and to prevent leakage of electromagnetic waves. Since the cut-off here is a hexagonal cross-section waveguide, much like the formation of cellular arrays, so called honeycomb panel.
3.4 Application of honeycomb panels
Aluminum honeycomb panel bonding material and metal (steel, copper, etc.) welding two. Aluminum honeycomb is bonded to a layer of aluminum foil layer bonded together according to certain rules, and then opened the form. cell phone jammer can also be called breaker.This material previously used in aircraft wings, so many places can be produced. But it is worth noting that this material can not be directly used for electromagnetic shielding. Because each cell of the surrounding conductive discontinuities. In practical engineering, will see a lot of this material is applied directly. This shielding effect is used when the poor. Because the original cellular material, the electrical connection between the cellular unit is leaning process due to "errors" between the cells causing cellular "short" form, and it's very random. Electromagnetic shielding to use this material on the metal coating process must be carried out using the metal coating around each cell to form a continuous conductive layer. cell phone jammer has the same function as the suppressor.Commonly used metal coating process is electroless plating, metal is generally nickel. This high cost of plating, after plating the cell often cost close to the metal plate welded honeycomb panels. U.S. SPIRAL company invented a special processing technology, can solve the problem of conductive aluminum honeycomb, while maintaining a low cost, we will provide in the next article. Aluminum honeycomb panel bonding strength is another problem, when there is a strong external force to the cellular material, it will damage the cell. Therefore, in using this material to the attention of the appropriate protective cellular network outside the installation. cell phone jammer acts according to the same principle as that of cropper. Metal plate welded honeycomb panel is an ideal shielding material, it is not the shortcomings of aluminum foil honeycomb panels, high shielding effectiveness. Although many foreign literature indicates that the high cost of this material, but in view of the cost of domestic aluminum plating is also higher, compared with aluminum honeycomb panel this drawback is not very prominent. Keli Yate manufactured board in metal welding cell is close to the cost of aluminum foil honeycomb panel. Commonly used honeycomb panel thickness is 1 / 2 inch of edge of unit cell size is generally l / 8 "(3.18mm), 3 / 16" (4.76mm).
Use of honeycomb panel materials problems that need attention around the same honeycomb panels overlap with the problem of shielding the substrate. cell phone jammer is the same as the isolator.This involves two lap points, a honeycomb panel core is the overlap with the border, border and shield the other is the overlap matrix.
3.4 Application of honeycomb panels
Aluminum honeycomb panel bonding material and metal (steel, copper, etc.) welding two. Aluminum honeycomb is bonded to a layer of aluminum foil layer bonded together according to certain rules, and then opened the form. cell phone jammer can also be called breaker.This material previously used in aircraft wings, so many places can be produced. But it is worth noting that this material can not be directly used for electromagnetic shielding. Because each cell of the surrounding conductive discontinuities. In practical engineering, will see a lot of this material is applied directly. This shielding effect is used when the poor. Because the original cellular material, the electrical connection between the cellular unit is leaning process due to "errors" between the cells causing cellular "short" form, and it's very random. Electromagnetic shielding to use this material on the metal coating process must be carried out using the metal coating around each cell to form a continuous conductive layer. cell phone jammer has the same function as the suppressor.Commonly used metal coating process is electroless plating, metal is generally nickel. This high cost of plating, after plating the cell often cost close to the metal plate welded honeycomb panels. U.S. SPIRAL company invented a special processing technology, can solve the problem of conductive aluminum honeycomb, while maintaining a low cost, we will provide in the next article. Aluminum honeycomb panel bonding strength is another problem, when there is a strong external force to the cellular material, it will damage the cell. Therefore, in using this material to the attention of the appropriate protective cellular network outside the installation. cell phone jammer acts according to the same principle as that of cropper. Metal plate welded honeycomb panel is an ideal shielding material, it is not the shortcomings of aluminum foil honeycomb panels, high shielding effectiveness. Although many foreign literature indicates that the high cost of this material, but in view of the cost of domestic aluminum plating is also higher, compared with aluminum honeycomb panel this drawback is not very prominent. Keli Yate manufactured board in metal welding cell is close to the cost of aluminum foil honeycomb panel. Commonly used honeycomb panel thickness is 1 / 2 inch of edge of unit cell size is generally l / 8 "(3.18mm), 3 / 16" (4.76mm).
Use of honeycomb panel materials problems that need attention around the same honeycomb panels overlap with the problem of shielding the substrate. cell phone jammer is the same as the isolator.This involves two lap points, a honeycomb panel core is the overlap with the border, border and shield the other is the overlap matrix.
The cell phone jammer can not be got correctively and timely
When there are two many sets of cell phone jammers, especially when the shielding is applied to many teaching buildings, it is hard to switch on or off uniformly and centrally. Even if the power line is arranged centrally, the specific personnel should be assigned to turn it on or off periodically.
·The information concerning about working state and fault status of the cell phone jammer can not be got correctively and timely.
After energizing all cell phone jammers through the centralized power switch, the managing personnel cannot be timely informed whether the cell phone jammer works normally or not.
·Not energy-saving and environment-friendly and bad for equipment maintenance
Turning on all cell phone jammer and running them will increase electricity consumption, which is bad for energy saving and environment.
·Inconvenient for group control and point-to-point control
The regular switch control can not be performed in specific groups (in sections, in buildings or in floors) or point to point.
·The phenomenon of intentional damaging the cell phone jammer can not be prevented.
The managing personnel cannot get and check if the student intentionally breaks the cell phone jammer or cut off the power to influence normal use of the cell phone jammer.
·The unfixed installation of cell phone jammer in the examination room will increase cost and expense, and waste time and energy.
Some school adopt the shielding way specific for the examination room that some cell phone jammers will be distributed to every examination room during the examination and they will be collected centrally, which will waste time and energy and at the same time, add risk of damaging the cell phone jammer so that the equipment management and maintenance will be influenced.
·The information concerning about working state and fault status of the cell phone jammer can not be got correctively and timely.
After energizing all cell phone jammers through the centralized power switch, the managing personnel cannot be timely informed whether the cell phone jammer works normally or not.
·Not energy-saving and environment-friendly and bad for equipment maintenance
Turning on all cell phone jammer and running them will increase electricity consumption, which is bad for energy saving and environment.
·Inconvenient for group control and point-to-point control
The regular switch control can not be performed in specific groups (in sections, in buildings or in floors) or point to point.
·The phenomenon of intentional damaging the cell phone jammer can not be prevented.
The managing personnel cannot get and check if the student intentionally breaks the cell phone jammer or cut off the power to influence normal use of the cell phone jammer.
·The unfixed installation of cell phone jammer in the examination room will increase cost and expense, and waste time and energy.
Some school adopt the shielding way specific for the examination room that some cell phone jammers will be distributed to every examination room during the examination and they will be collected centrally, which will waste time and energy and at the same time, add risk of damaging the cell phone jammer so that the equipment management and maintenance will be influenced.
The same antenna will be utilized when the cell phone jammer system receives or sends
The same antenna will be utilized when the cell phone jammer system receives or sends, which is the logarithmic antenna. The single chip microcomputer will be adopted to control close of the transmit-receive switch. The sampling control order will be sent to the ADC sampling power value periodically with the help of set procedure. If the transmission of RACH pulse is detected, the interference module will start to work. And at the same time, the timer will start to work to realize the 20s interference time.
The design chooses the high power characteristic of sending RACH pulse when making or receiving calls as the parameter selection of detection to recognize the building of aerial interface between the cell phone and base station to start interference. Then the purpose of shielding cell phone can be achieved. And the same time the intelligentialization and environmental protection of cell phone jammer can be realized.
The intelligent and environmental cell phone jammer has been successfully used in the examination room, meeting room and some other locations where cell phone jammer is needed. Great economic and social benefit can be achieved.
Until the cell phone jammer system detects the signal again, it will start the interference module again. This process will be repeated like this to monitor and inspect the sudden change of space radiation power level. The design can not only reduce the radiation but also the power consumption. Then the really intelligent and environmental cell phone jammer can be realized.
The self-inspection and detection of the background noise will be realized by the same circuit. The procedure will be used to control the time division work. The measurement of background noise power will be implemented only when the cell phone jammer system is turned on and energized. Others work in the detecting and interfering status.
The design chooses the high power characteristic of sending RACH pulse when making or receiving calls as the parameter selection of detection to recognize the building of aerial interface between the cell phone and base station to start interference. Then the purpose of shielding cell phone can be achieved. And the same time the intelligentialization and environmental protection of cell phone jammer can be realized.
The intelligent and environmental cell phone jammer has been successfully used in the examination room, meeting room and some other locations where cell phone jammer is needed. Great economic and social benefit can be achieved.
Until the cell phone jammer system detects the signal again, it will start the interference module again. This process will be repeated like this to monitor and inspect the sudden change of space radiation power level. The design can not only reduce the radiation but also the power consumption. Then the really intelligent and environmental cell phone jammer can be realized.
The self-inspection and detection of the background noise will be realized by the same circuit. The procedure will be used to control the time division work. The measurement of background noise power will be implemented only when the cell phone jammer system is turned on and energized. Others work in the detecting and interfering status.
The size of the detector of cell phone jammer intelligent system
Glass and glass substrates by the laser ion activation of two parts. Various physical and chemical properties of laser glass mainly determined by the matrix glass, and its spectral properties are mainly determined by the activation of ions. However, activation of matrix glass and the interaction between ions, so the laser active ions on the physical and chemical properties of the glass to a certain extent, and the glass substrate of the spectroscopic properties of its sometimes very important.
In 1958, U.S. scientists Xiao Luo and Townes discovered a magical phenomenon: when they will launch within the light bulb in a light rare-earth crystal, the crystal emits bright molecules, always with the strong convergence light.And then restart the detector of cell phone jammer intelligent system and software. According to this phenomenon, they proposed a "laser principle", that is its molecular substances in the natural oscillation frequency by the same excitation energy, will not produce such divergent light - the laser. They found important for this paper.
Xiao Luo and Townes research was published, scientists from various countries have put forward a variety of experimental programs, but all without success. May 15, 1960, California, USA Hughes laboratory scientists Maiman announced the acquisition of the laser wavelength of 0.6943 micron, which is the first human ever to obtain a laser beam, Maiman and thus become the world's first the introduction of practical laser scientists in the field.The size of the detector of cell phone jammer intelligent system is 22mm×103mm×232mm.
July 7, 1960, Maiman announced by the world's first laser birth of Maiman's program is the use of a high-strength flash tube, to stimulate the ruby crystal in the chromium atoms, resulting in a considerable concentration of the thin red light beam, when it is fired at a certain point, you can make it up even higher than the sun's surface temperature.
According to foreign periodicals revealed that since the 1970s, many United States and Russia are respectively the name of dozens of anti-satellite laser weapons test.
Currently, the anti-missile laser weapon developed strategic types of chemical lasers, excimer lasers, free electron lasers and laser radiation transfer. For example: free-electron laser with output power, beam quality, high efficiency, tunable range and so on. However, the free-electron laser in size, suitable only for installation on the ground, ground-based laser weapons for use. Adjust all detectors of cell phone jammer intelligent system according to the instruction and restart all detectors of cell phone jammer intelligent system.Operations, the strong laser beam shines at the first high-orbit space interrupted mirror. Interrupt mirror reflection to the laser beam in a low-orbit operations mirror, mirror operations targeting the laser beam again, attack. Through this two reflections, set in the free-electron laser weapons on the ground, you can attack from anywhere in the world launch of strategic missiles.
High-energy laser weapon is an energy-based laser weapons and space vehicles of the combination. When the laser along the space orbit Ge, once found other targets to battle. Because of its deployment in space, commanding, wide field of vision is even more powerful. In actual battle, it can be each other's aerial targets lightning attack to destroy the enemy's reconnaissance satellites, early warning satellites, communication satellites, meteorological satellites, and even each other's ICBM can destroy the increase in boost phase.
Laser glass is a glass matrix of solid-state laser materials.Shut off the software and all detectors of cell phone jammer intelligent system after finishing all commissions. It is widely used in various types of optical devices in solid-state laser and a high power and high-energy lasers main laser material.
In 1958, U.S. scientists Xiao Luo and Townes discovered a magical phenomenon: when they will launch within the light bulb in a light rare-earth crystal, the crystal emits bright molecules, always with the strong convergence light.And then restart the detector of cell phone jammer intelligent system and software. According to this phenomenon, they proposed a "laser principle", that is its molecular substances in the natural oscillation frequency by the same excitation energy, will not produce such divergent light - the laser. They found important for this paper.
Xiao Luo and Townes research was published, scientists from various countries have put forward a variety of experimental programs, but all without success. May 15, 1960, California, USA Hughes laboratory scientists Maiman announced the acquisition of the laser wavelength of 0.6943 micron, which is the first human ever to obtain a laser beam, Maiman and thus become the world's first the introduction of practical laser scientists in the field.The size of the detector of cell phone jammer intelligent system is 22mm×103mm×232mm.
July 7, 1960, Maiman announced by the world's first laser birth of Maiman's program is the use of a high-strength flash tube, to stimulate the ruby crystal in the chromium atoms, resulting in a considerable concentration of the thin red light beam, when it is fired at a certain point, you can make it up even higher than the sun's surface temperature.
According to foreign periodicals revealed that since the 1970s, many United States and Russia are respectively the name of dozens of anti-satellite laser weapons test.
Currently, the anti-missile laser weapon developed strategic types of chemical lasers, excimer lasers, free electron lasers and laser radiation transfer. For example: free-electron laser with output power, beam quality, high efficiency, tunable range and so on. However, the free-electron laser in size, suitable only for installation on the ground, ground-based laser weapons for use. Adjust all detectors of cell phone jammer intelligent system according to the instruction and restart all detectors of cell phone jammer intelligent system.Operations, the strong laser beam shines at the first high-orbit space interrupted mirror. Interrupt mirror reflection to the laser beam in a low-orbit operations mirror, mirror operations targeting the laser beam again, attack. Through this two reflections, set in the free-electron laser weapons on the ground, you can attack from anywhere in the world launch of strategic missiles.
High-energy laser weapon is an energy-based laser weapons and space vehicles of the combination. When the laser along the space orbit Ge, once found other targets to battle. Because of its deployment in space, commanding, wide field of vision is even more powerful. In actual battle, it can be each other's aerial targets lightning attack to destroy the enemy's reconnaissance satellites, early warning satellites, communication satellites, meteorological satellites, and even each other's ICBM can destroy the increase in boost phase.
Laser glass is a glass matrix of solid-state laser materials.Shut off the software and all detectors of cell phone jammer intelligent system after finishing all commissions. It is widely used in various types of optical devices in solid-state laser and a high power and high-energy lasers main laser material.
Subscribe to:
Posts (Atom)