In class, some students secretly use their mobile phones to read novels, make phone calls, send messages, and so on, and the school always wants to find ways to stop it. At the same time, the phone jammer has gradually become the favorite of schools. At present, more and more schools choose to install this product, which seems to play a very important role.

Mobile phone, as a very simple electronic device for cheating, can easily obtain the desired answers from the Internet of Things. This small and easy to hide electronic device gives invigilators a headache. It is easy for the phone jammer to disturb the mobile phone signal. Once the device is turned on, the mobile phone cannot receive any signal, and students cannot cheat on the Internet through their mobile phones. Some schools use these shielding devices to prevent students from cheating in exams, reducing the waste of human resources to a certain extent.

According to the distance between the on-site base stations, the strength of the on-site environmental signals shall be measured, and the size of the shielded site space shall be added for proper installation and use. This kind of phone jammer transmits signals similar to the base station, covers the signals transmitted by the mobile phone, thus damaging the connection between the mobile phone and the base station. Its power probability will exceed the normal signal strength, thus achieving the desired shielding effect. Nowadays, the signal shielding equipment is good in reverse direction in schools, and has been used in many schools, becoming an indispensable equipment for examinations.