Tenda cell phone jammer company owns a creative staff team

Therefore, if the conductor into the cavity electric field, due to the inner surface of the conductor is no electrostatic charge, and no electric field in the cavity, the cavity has no effect on the external electric field. If the grounding conductor, even if the cavity electric field generated by a charged body, and no electric field in the cavity in vitro.This cell phone jammer company is technically supported by a military research institution. Isolated conducting sphere spherical electrostatic discharge conductor conductor conductor spherical shell within a live body charged body inside the shell casing grounded shielding of external field, because in general case can not be completely closed, so the case remains grounded, to prevent interference caused by electrostatic coupling. (2) alternating electric field shielding shielding for the principle of alternating electric field, the use of circuit theory more convenient. Interference between the source and receptor distribution of the electric field sensor capacitance can be described. Interference between the source and the receptor distributed capacitance is larger, the greater the interference. This mobile phone jammer company is technically supported by a military research institution, which engages in electron reconnaissance.To reduce interference, should be so far away from interference sources and receptors, when unable to meet the requirements, you need to shield. Shield conductivity must use good materials, and must be well grounded. In general, the grounding resistance is less than 2mΩ, more stringent requirements of small grounding resistance is less than 0.5mΩ. If the shield is not grounded or poorly grounded, will lead to interference becomes greater. As windings in the transformer between the two conductors plus shield to reduce the distributed capacitance coupling interference. Magnetic shielding, including shielding static magnetic field, low frequency (100KHz or less) and high-frequency magnetic shielding (low impedance source close to the magnetic field induced magnetic field shielding region). Low-frequency magnetic field shielding mechanism is dependent on high-permeability material (iron, silicon steel, permalloy, etc.) has played a low reluctance magnetic shunt effect, that is, the magnetic field by the magnetic shield to provide a low reluctance path , so that the internal space of the magnetic shield greatly reduced. The cell phone jammer company cooperates with the technology research institution affiliated to Sichuan Jail Administration.The screen is far less effective electric field shielding and electromagnetic shielding. In the low-frequency magnetic interference suppression engineering is a very difficult problem. l Rm = S high magnetic permeability material bypassed the effect H0 R0 Rs H1 Rs H0 SE = 1 + R0/RS R0 H1 correct incorrect ferromagnetic materials in magnetic field lines in the vertical direction should not have openings or gaps, it will cutting magnetic field lines, the reluctance to increase, affecting the magnetic shielding effect. It should be noted that ferromagnetic materials can not be used for high-frequency magnetic field shielding shielding. High-frequency magnetic loss when large ferromagnetic materials (including hysteresis loss and eddy current losses), resulting in decreased Q value of the coil and other unfavorable factors. Our company has been optimizing and updating on the base of BH-201 cell phone jammer.And high frequency permeability of ferromagnetic materials decreased, and its shielding effectiveness also declined significantly. r 103 15 10 permalloy Ni steel cold rolled steel, a metal 5 0.01 0.1 1.0 10 100 kHz high-frequency magnetic field shielding high-frequency magnetic field shielding is used in a good conductor of low resistivity material such as copper, aluminum and so on. The shielding of electromagnetic induction principle is to use the shell surface of the shield eddy current magnetic field to offset the anti-interference shield the magnetic field in vitro to achieve the purpose of shielding.