An associate professor at Southeast University’s School of Cyberspace Security explained that using a mobile phone to start a fire at a gas station requires two conditions. One is that the concentration of the oil and gas mixture on site must reach a certain proportion, and the other is that the power of the electromagnetic wave of the mobile phone is large enough to generate sparks on the circuit. Therefore, in theory, it is possible to make a phone call at a gas station or use other functions of a mobile phone to cause a gas explosion, but in real life, this probability is very low. As long as we keep the payment site away from air guns, the risk factor is reduced. : “But in real life, our phones have a limited transmit power. So now their maximum power is nowhere near producing sparks. Our phones are basically touch-enabled smartphones these days. Compared to the old– Older cell phone, which is safer to use because it doesn’t have some mechanical operation, so there’s less chance of sparks.” The look of the cell phone signal jammer is the perfect solution to this century’s problem.
The best working principle of mobile phone signal jammer; the working principle of mobile communication is to connect wireless devices (mobile phones, etc.) and signal towers through radio waves within a certain frequency range, and complete data with a certain baud rate and modulation method and sound. spread. When the mobile phone communicates, it communicates with the signal tower through the uplink frequency, and then transmits the signal to the mobile service switching center to realize the call. In standby mode, the phone communicates with the tower via the broadcast control channel. Once there is a need for a call, first, according to the specific conditions of the channel near the terminal, it is allocated to the mobile phone service channel by request, so that the mobile phone can jump to the service channel to realize the communication and data transmission.
At the same time, wireless communication must ensure a sufficient signal-to-noise ratio to effectively receive and complete the communication. According to the above working principle, the mobile phone signal jammer is generally composed of a power supply, an electronic scanning control unit, a segmented radio frequency module unit, an amplifier unit, and a transmitting antenna unit. The scanning signal generated by the signal generator passes through the inverter, enters the oscillator to be modulated 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. Since the frequency sweep signal affects the message signal received by the mobile phone (increasing the proportion of noise signals to the device threshold), the mobile phone cannot receive the normal data sent by the signal tower, and the mobile phone cannot establish a normal connection with the signal tower. The communication network between cell phones and cell towers is separate. The mobile phone has no signal and no service system in the search network, so as to achieve the shielding effect.