The best operating principle of mobile phone signal jammer; The working principle of mobile communication is that within a certain frequency range, wireless devices (mobile phones, etc.) and signal towers are connected by radio waves, and data and sound are completed at a certain baud rate and modulation method. transmission. When the mobile phone communicates, it communicates with the signal tower through the uplink frequency, and then transfers the signal to the mobile service switching center to realize the call. In the standby state, the mobile phone communicates with the signal tower through the broadcast control channel. Once there is a call demand, firstly, it is allocated to the mobile phone service channel according to the specific conditions of the channel near the terminal through the request, so that the mobile phone can jump to the service channel to realize the call and data transmission. At the same time, wireless communication must ensure a sufficient signal-to-noise ratio to receive effectively and complete the communication. According to the above working principle, Miniature Cell Phone Jammer generally consists of power supply, electronic scanning control unit, segmented radio frequency module unit, amplifier unit, transmitting antenna unit and other parts. The scanning signal generated by the signal generator passes through the inverter, enters the oscillator and modulates it to the mobile communication working frequency band, and then is amplified by the power amplifier and the voltage regulator tube controls the power. The amplified frequency sweep signal is transmitted into the air in the form of radio waves. Because the frequency sweep signal affects the message signal received by the mobile phone (increasing the proportion of the noise signal to the device threshold), the mobile phone cannot receive the normal data sent by the signal tower, so that the mobile phone cannot establish a normal connection with the signal tower. The mobile phone is separated from the communication network of the signal tower. The mobile phone shows the phenomenon of no signal and no service system in the search network, which achieves the blocking effect. cell phone jammer
The influence power of the mobile phone jammer is a certain unblocked space. The shielding radius is determined by the path attenuation and the signal level of the receiving tower. To realize the influence of the mobile phone signal influencer on the mobile network, it is necessary to ensure that the signal field emitted by the influencer is stronger than the field strength of the mobile signal in the affected area. The closer the influence location is to the signal tower, the stronger the field strength and the smaller the effective influence area. Conversely, the farther the impact point is from the signal tower, the weaker the field strength and the larger the effective impact area. It can be seen that within a certain transmission power, the influence range depends on the field strength in the influence area, no matter how high the power is Miniature Cell Phone Jammer , as long as the transmission power is a fixed value, as the distance increases, the influence signal strength will gradually attenuate, thereby losing the influence ability. The following table shows the comparison table of distance and path attenuation. Then the output channel power of the mobile phone jammer, the signal level of the signal tower, and the coverage line gain can determine the theoretical coverage radius with reference value.
