cell phone jammer is not similar to the signal booster

cell phone jammer is not similar to the signal booster.
The top of the diagram in Figure 2-19 shield stainless steel sheet, isolate the power supply circuit and other circuits, the graph in the lower part of the shielding box with stainless steel sheet across the baseband circuits and RF circuits, in order to prevent each other interference between the role of anti-static shield and shielding box must be good with the PCB and chassis ground. Shield made by low cost of tinplate, the shielding performance to meet the requirements, just outside the tourist brightness effect to be satisfactory. Tin refers to both sides of the tin-plated cold-rolled low-carbon steel sheet, the English abbreviation for the SPTE. The substrate is a crystalline martensite iron-carbon alloy. cell phone jammer is good for hidden ability of the cell phone signal jammer.So that the problem of cell phone jammer can be found out timely
Figure 2-19 phone EMC shrapnel Figure 2.7.4 ESD protection design cell phone static (Electro-Static) source of manpower conduction and mobile phones on the friction in the pocket. Northern than the southern region is easy to produce static electricity; the weather gets dry, the more easy to produce static. The pathway of the mobile phone of ESD is a gap of chassis and interface such as the SIM card socket, keyboard, headphone, microphone, power connector, USB interface and color LCD and so on. When the use of mobile phones, hand-static, it is possible through the conduction of these interfaces into the static-sensitive components, such as the chip of the CMOS process, resulting in shortened life expectancy of these components or functional failure. The valid jamming distance of cell phone jammer is 0.5-10m.
Phone ESD (Electro-Static Discharge, ESD) protection design is taken to isolate and release of the 39 two methods. The first part of the protection design standards can be found in YD/T1032-2000 900/1800MHz TDMA digital cellular mobile communication systems - Electromagnetic compatibility - Limits and methods of measurement: the mobile station and its auxiliary equipment ". ESD isolation design is the ESD conduction path and the static-sensitive components are separated from the housing point of view on the button, the interface gap around inside the shell ribs isolate each key, as shown in Figure 2-14 upper shells diagram. Such as the whole array of silicone keys to increase the distance of the static electricity to the circuit, has played a role in isolation. cell phone jammer is determined by the signal strength of the mobile communication operator.