How wireless signal jammers work
The working principle of mobile communication is that within a certain frequency range, wireless devices (mobile phones, etc.) and base stations communicate through radio waves to complete the transmission of data and sound with a certain baud rate and modulation method. When the mobile phone communicates, it contacts the base station through the uplink frequency, and then transmits the signal to the mobile service switching center to realize the call. In the standby state, the mobile phone communicates with the base station through the broadcast control channel. Once there is a call demand, first, according to the specific conditions of the channel near the terminal, the mobile phone is allocated to the mobile phone service channel by 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 sufficient signal-to-noise ratio in order to receive and complete communication effectively.
According to the above working principle, mobile phone signal GPS jammers are generally composed of power supply, electronic scanning control unit, segmented radio frequency module unit, power amplifier unit, transmitting antenna unit and other parts. After the signal generator generates the scanning signal, it goes through the inverter and enters the oscillator to be modulated to the mobile communication working frequency band, and then 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 forms garbled interference in the message signal received by the mobile phone, the mobile phone cannot receive the normal data sent by the base station, so that the mobile phone cannot establish a normal connection with the base station, and the mobile phone is disconnected from the communication network of the base station. The mobile phone shows that the search network has no signal, no service system, etc., to achieve the shielding effect.