Although the time of some examinations this year has been affected by the epidemic, in order to ensure the information security of the examination room, the corresponding measures have not been reduced at all. Some schools will be equipped with wireless jammers during the exam, which will affect the communication quality of mobile phone users around the school. Communication will not return to normal until the end of the exam. How did the wireless jammer shield the mobile phone signal during the exam and how did it do it? Today I will make a detailed introduction to you.

To know how wireless jammers shield signals, let's first understand the working principle of mobile communication. As a mobile communication device, mobile phones need to be connected to nearby base stations before communication. In this process, all information is transmitted continuously through electromagnetic waves.

Only one wireless jammer needs to be configured to shield all mobile phone signals in the examination room area. The wireless jammer shields the mobile phone from receiving the signals transmitted by the base station through its own frequency, so that the mobile phone loses its function and achieves the purpose of shielding the mobile phone. At present, the wireless jammers used in the examination room can shield all 2g/3g/4g/5g frequency bands of the three operators, and WiFi signals and Bluetooth signals can also be shielded.

Therefore, both mobile phones and special wireless devices will lose their function in the examination room. In the fair environment built by wireless interference institutions, all candidates can only focus on the examination work in front of them, preventing cheating in the examination room.