What is the working principle of wireless wifi signal jammer from dojammer's blog

Communication technology is developing faster and faster, and 5G technology has been basically popularized in recent years, but do you know what is the working principle of wireless wifi signal jammer?

The working principle of mobile communication technology is that within a certain frequency range, the transmitting wireless network equipment and the base station communicate through electromagnetic waves, and transmit data and sound at a certain serial port baud rate and modulation method. The normal operation of the mobile phone is to send the working frequency to the base station, but there is a voice call requirement. First, according to the request report, according to the specific situation of the peripheral channel of the terminal, it is allocated to the mobile phone service channel, so that the mobile phone jumps to the service channel to realize voice calls and transmit data. At the same time, wireless communication must ensure sufficient frequency stability in order to better receive and communicate.

According to the above principle, the several major modules of the wireless wifi signal jammer are composed of switching power supply, scanning control module, segmented RF module, amplifier module, transmitting antenna unit and other parts. After the signal jammer's transmitted scanning signal passes through the inverter, it enters the oscillator and is adjusted to the mobile communication working frequency band, and then amplified by the power amplifier and controlled by the voltage regulator. After amplification, the frequency deviation signal is emitted into the air in the form of electromagnetic waves. Because the frequency deviation signal generates error code interference in the mobile phone's received message signal (increasing the noise signal ratio to the device threshold), the mobile phone cannot receive the normal data transmitted by the base station, so that the mobile phone cannot establish a normal connection with the base station, thereby causing the mobile phone to leave the base station communication network. The mobile phone manifests as the phenomenon of no network signal and no service system, achieving the blocking effect.

The working principle of the wireless wifi signal jammer is to scan the low-frequency working frequency of the channel to the high-frequency scanning at a certain speed during operation. The scanning speed can also generate error code interference in the mobile phone's received message signal, and the mobile phone cannot detect the normal data transmitted from the base station, so that the mobile phone cannot establish a connection with the base station, achieving the effect of shielding the mobile phone signal, and the mobile phone manifests as the phenomenon of network search, no signal, and no service system.

The interference output power of the wireless wifi signal jammer is certain, and the shielding radius of the unobstructed space is determined by the path loss and the receiving base station signal pulse signal. In order to achieve the interference of the mobile phone signal jammer on the mobile network, it is necessary to ensure that the signal field strength emitted by the jammer exceeds the field strength of the mobile signal in the interference area. The closer the interference address is to the base station, the higher the field strength and the lower the effective interference area. On the contrary, the farther the interference address is from the base station, the weaker the field strength and the more effective interference areas.

It is not difficult to see that within a certain signal strength, the interference range depends on the field strength in the interference area. No matter how powerful the wireless wifi signal jammer is, as long as the signal strength is constant, as the distance increases, the interference signal strength will gradually decrease, thereby losing the interference level. The following is a comparison table of distance and path loss. Then the wireless wifi signal jammer derives the channel output power, base station signal pulse signal, and coverage line gain value to determine the theoretical coverage radius with practical value.