Cell phone jammer has put an end to disasters in some certain occasions

The main shielding mechanism is absorbed and not reflected. c, in the strong electromagnetic environment, the requirement that materials can shield two components of electric and magnetic fields, so the need for structural integrity of the ferromagnetic material.   cell phone jammer helps to safeguard the national interest. Shielding effectiveness directly affected by the thickness of the material and methods of bonding and grounding is good or bad effects. d, the plastic shell, the inner wall coating in its shield, or when mixed with the gas metal plastic fiber. The need to minimize the electrical structure of the discontinuity, in order to control access by floor and chassis leakage radiation. Improve the shielding effectiveness of the gap structure measures include increasing the depth of the gap, reducing the gap length, joined in with the surface of conductive pads, coated with conductive paint in seams, shorten the distance between the screws. [Lap] a, in the case of each floor and seam discontinuities and to the best possible lap.
Inner and outer shield is installed, pay attention to the insulation between each other. When there is no grounding requirements, insulating materials made available to support pieces. For grounding, the choice of non-ferromagnetic materials (such as copper, aluminum) do support pieces. 3 is the use of electromagnetic shielding electromagnetic shielding electromagnetic shield to prevent the spread of a measure in the space.
cell phone jammer has put an end to disasters in some certain occasions. The mechanism of electromagnetic shielding: a, when the wave reaches the surface of the shield, due to the air with the metal surface of the junction impedance discontinuity, the reflection of the incident generated. This reflex does not require shielding material must have a certain thickness, the junction surface does not only require continuous; b, is not reflected from the surface of the shield and into the energy spread in the body forward in the process of attenuation by shielding materials . So-called absorption; c, attenuation in shielding the body has not been out of the remaining energy, reached the surface of another material, encountered the metal - air interface of the impedance discontinuity will form again reflected, and return to shield the body. This reflection at the interface between two metals may have multiple reflections.   phone jammer can stop leaking national important message. In short, the electromagnetic shield the electromagnetic wave attenuation is mainly based on the reflection and absorption of electromagnetic waves. [Loss] absorption of different materials, different material thickness for the absorption of electromagnetic waves is not the same. Can be absorbed by the material loss nomogram derived. [Return Loss] is divided into three categories: low-impedance magnetic field, high-impedance electric field, plane wave field. The low impedance and high impedance electric field reflection loss calculated in the same column chart, and metal materials, frequency and distance from the radiation source to the shield.   cell phone jammer      has restricted the use of cell phones or wireless communication equipment. For a plane wave, wave impedance is a constant, with the distance from the radiation source to the shield has nothing to do, only in the column chart to connect metallic materials and in the frequency of interest can be obtained at this time of the return loss values. 4 The actual structure of the electromagnetic shielding materials a, floor and chassis for the majority of the material is a good conductor such as copper, aluminum, etc., can shield the electric field, the main shielding mechanism is reflection rather than absorption signal. b, the magnetic field shielding needs ferromagnetic materials, such as high permeability alloy and iron.