Mobile jammers can also interrupt WiFi and Bluetooth signals
At present, the mobile phone jammers used in the examination room are all full frequency bands, which can interfere with all frequency bands of the three operators 2G/3G/4G/5G, and WIFI signals and Bluetooth signals can also be shielded. The above is the principle of mobile cell phone jammer. However, the frequency range of electromagnetic waves ranges from several Hz to several hundreds of GHz, and each segment may be used as a communication signal. Will there be some special frequency bands that are used in the examination room? This is true for other radio communication tools, and radio communication tools with dedicated frequency bands "came into being" in this context. The working frequency band of these devices is selected outside the frequency range covered by the mobile phone jammer, and the mobile phone signal jammer will not work on them.
For this special radio communication tool, the examination room is specially equipped with a mobile phone jammer for real-time monitoring of radio wave signals of unknown origin. So how exactly does a radio jammer work? Since electromagnetic waves have the characteristics of "near big and far small", by constantly moving the detection vehicle, the monitoring equipment can locate the signal transmitter according to the distance and the strength of the signal, and capture the offenders using these radio communication tools on the spot. Nowadays, drones have also appeared in the college entrance examination examination room, which can carry out signal positioning faster. Therefore, neither mobile phones nor these special radio equipment can play a role in the college entrance examination room.