Shut off the power supply switch of the host of cell phone jammer

Disadvantages: The main advantages / disadvantages: large deformation, high shielding effectiveness, allowing the sliding contact / high price spiral magnetic sealing gasket from the beryllium copper or stainless steel strip rolled into a coil, a high shielding effectiveness (in all electromagnetic gasket highest shielding effectiveness). Main advantages / disadvantages: low price, high shielding effectiveness / by excessive compression, easy Disadvantages: damaged. Conductive fabric conductive fabric wrapped on a foam rubber core form, usually rectangular, with the adhesive, installation is very convenient. High-frequency shielding effectiveness are high.If it is unnecessary to block the cell phone signal, shut off the power supply switch of the host ofcell phone jammer.  Disadvantages: The main advantages / disadvantages: low price, easy to damage of excessive compression, soft, with some environmental seal / frequent friction can damage the conductive surface. (2) the main parameters of electromagnetic gasket related to the overall shielding effectiveness) shielding effectiveness (related to the overall relationship to the overall shielding effectiveness of conductive shielding effectiveness: conductivity: the conductivity of the better cushioning material, electromagnetic sealing the better. Need Note that the conductivity considered here refers not only to the DC resistance, but also the RF impedance, for example, the DC resistance of the wire is small, but significant RF impedance is so low-frequency wire mesh gasket shielding effectiveness is high, For the emission power of cell phone jammer has been adjusted before delivery, the customer doesn’t need to adjust after purchasing.The high-frequency shielding effectiveness of low resilience (stiffness related to the cover and screw spacing) resilience (stiffness related to the cover and screw spacing) per unit length (or area) liner compression force applied on the pad produced amount of compression. resilient liner larger panel of rigid requirements better, otherwise it will effect in the pads of resilient deformation occurs, resulting in a larger gap, therefore, shielded chassis design, pay attention to bear on the cover Solid screw spacing should be appropriate to cover the liner to prevent the elastic deformation under the effect, resulting in a greater gap. Minimum sealing pressure (related to the minimum amount of compression) Minimum sealing pressure (related to the minimum amount of compression) EMI gasket must deformation in order to have enough to provide adequate shielding effectiveness, therefore, must ensure that there is sufficient pressure on the pad.The blocking range of cell phone jammer has something to do with the installation position and height. pressure is too small, not only the shielding effectiveness is low, and shielding effectiveness is very sensitive to pressure, resulting in instability in shielding effectiveness of the chassis. pressure Assembly resulting in liner damage. the liner with the expected shielding effectiveness as the minimum pressure required to seal the pressure minimum for the actual use of the liner, the largest gap at the pressure applied to the gasket sealing pressure is greater than the minimum Maximum deformation (related to the maximum compression) maximum deformation (related to the maximum compression) compression deformation (related to the switching frequency allows the lid) compression deformation (related to the switching frequency allows the cover) if the gap is frequently open on / off, then the compression set of indicators is critical.The antenna direction can influence shielding range of cell phone jammer. electrochemical compatibility (related to the stability of the shielding effectiveness) electrochemical compatibility (related to the stability of the shielding effectiveness) of different metal-metal contact surface potential due differences exist in the electrolyte environment, the electrochemical reaction occurs, the resulting chloride is a semiconductor, which will reduce the conductivity of the junction, and will cause additional interference, so shielding gasket materials and substrate materials there must be certain on the electrochemical compatibility, otherwise it will quickly corrode.