cell phone jammer Used in Occasions And openings

Shielding is the use of the shield (with specific properties of the material) to prevent or attenuate electromagnetic interference energy transfer channels, thereby suppressing electromagnetic interference. Shield has two purposes: limit leakage of internal radiation of electromagnetic energy; to prevent interference from external radiation to enter. Covering the vent of    cell phone  jammer   is strictly prohibited. Due to shield the electromagnetic interference from external electromagnetic waves are spread within the play to absorb energy (eddy current loss), the reflected energy (electromagnetic waves in the interface reflection on the shield) and offset energy (electromagnetic induction in a reverse electric field shielding layer, can offset part of the electromagnetic interference) effect, so it has less interference function. According to shield shield works can be divided into the following three categories: field shielding, magnetic shielding and electromagnetic shielding.
1.1 electric field shielding
When the interference source is the voltage generated by the form of interference, the interference with electronic equipment, the electric field between the capacitive coupling exists, can be regarded as distributed capacitance between the coupling. Keep the    cell phone  jammer   dry and any liquid is prohibited to penetrate into it. To eliminate or suppress such interference, to conduct field shielding. The design should comply with the following principles:
1) as close as possible to shield the protected material, and ground the shield must be good;
2) The shielding effect is good or bad and the shape of the shield has the most direct relationship. If the shield can be made of closed metal box is best, but also in engineering practice according to the actual circumstances of the case;
when the power cord into the chassis, all should be through the filter box. Input filter is best to wear clothing to shield case outside; case if the filter structure should not wear clothing, it should be in the power cord into the chassis out of a compartment for the filter set.If you use the   cell phone  jammer outdoors, pay attention to add protective equipment in the environment where there would be mice or ants around.
c, signal lines, control lines into / out chassis, through the appropriate filter. With multi-core filter pin connectors used for such occasions.