The blocking radius range of cell phone jammer

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.