Basic introduction of wifi signal jammer
The common wifi jammer on the market, the role of frequency: 869 ~ 894MHz; 825 ~ 960MHz; 1805 ~ 1880MHz and 1900 ~ 1990MHz, etc.The action band is CDMA800, GSM900, DCS1800, PCS1900. can control the diameter of about 40 meters range, using DC-DC converter input voltage, 5V output voltage. After opening the signal blocker, the cell phone receives messy code interference in the telegram signal, cannot detect the normal data sent from the base station, and cannot establish connection with the base station. The performance of the search network, no signal, no service system and other phenomena. Specified range of cell phones to send and receive signals function failure, can not dial out and dial in, so as to achieve the purpose of mandatory disable.
Mobile communication principle
The working principle of cell phone is as follows: within a certain frequency range, cell phone and base station are linked up by radio waves to complete the transmission of data and sound at a certain baud rate and modulation.
The principle of wifi signal jammer
Wifi jammer device transmit at the same frequency as the signal to be jammed. However, if the wifi frequency jammer sends a significantly stronger signal, it renders the original signal unusable - making communication more difficult or impossible.
In a WLAN, this means that the exchange of packets works only to a limited extent or not at all, and that the actual data streams can no longer be put together properly. For devices performing security-related tasks, this can be a critical issue.
First we need to know the frequency used by the wifi signal transmission device, which is usually between 2400-2500MHz. The phone or computer receives the signal and completes the communication. According to the above working principle, wifi jammer kit usually consists of power supply, electronic scanning control unit, segmented RF module unit, amplifier unit and transmitting antenna unit. The signal generator generates a scanning signal through an inverter, switches from the modulation of the oscillator to the working frequency band of the mobile communication, and then controls the power through the amplification of the amplifier and voltage regulator. The amplified frequency scan signal is then transmitted into the air in the form of radio waves. Scrambled signals form scrambled interference in the message signal received from the cell phone. The cell phone cannot receive the normal data sent by the wifi device, resulting in the inability to establish a normal connection with the wifi jammer device. As a result, the cell phone is unable to search for signals from networks, service systems, etc., thus obtaining a shielding effect.
Bluetooth wifi jammer basic functions
1, slow start function wifi blocker after power on, the working power rose from zero to stable within 4 seconds.
2, shielding function after the completion of the start, within 35 seconds so that the role of the range of cell phones are shielded.
Wifi frequency jammer application range
All kinds of examination rooms, conference rooms, gas stations, oil depots, churches, hospitals, courts, military sites, libraries, theaters and other places.