What are the three ways to block WIFI signal?
When using WIFI, we may be shielded by WIFI signal. Do you know what are the ways to cause this kind of shielding? Let’s find out with the editor of WIFI blocker manufacturer:
1) Brute-force attack: generate interference in the full frequency band of the target frequency band (such as the 5G frequency band you mentioned). The greater the interference, the lower the signal-to-noise ratio. When the signal-to-noise ratio is lower than the minimum signal-to-noise ratio required for demodulation of the physical layer, demodulation cannot be obtained.
2) First monitor the wifi channel. Every time the router sends a signal, an interference signal is superimposed, and the terminal cannot search for the router, which is equivalent to shielding the router. Or wait for the terminal to send data, interfere, and it is impossible to communicate successfully.
3) Attack through protocol vulnerabilities.
The shield 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. After the signal generator generates the scanning signal, it goes 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 scanning 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 (increase the ratio of the noise signal to the device threshold), 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, so that the mobile phone is disconnected. Base station communication network. The mobile phone shows the phenomenon that the search network has no signal, no service system, etc., to achieve the blocking effect.
