Now, the function of mobile phone is becoming more and more powerful, and it has gradually become an irreplaceable important communication tool in people's life. Of course, there are both advantages and disadvantages. Recently, the negative impact brought by mobile phones is not small. Mobile phones have become a new channel for leak secrets and a means of crime. Therefore, it is necessary to strengthen the control of mobile phones when necessary. It can be used in some places where mobile phone communication is not needed, such as the office space of the examination department and the confidential department, the gas station, etc. Because of its advantages of convenient installation and simple use, more and more units use wireless jammers, and the equipment signal is always in a relatively static state, which will not interfere with other electrical equipment, and it also plays a certain role in some special places.

When the wireless jammer is working, it transmits a strong signal with the same frequency as the downlink frequency band of the mobile phone, which is tuned to the signal sent from the base station to the mobile phone, so that the downlink signal sent from the base station to the mobile phone is deformed, and the mobile phone cannot recognize it, thus interrupting the connection between the mobile phone and the base station. In short, the main function of the wireless jammer is to make the mobile phone unable to use normally. Essentially, it is to interfere with the network used by the mobile phone, so that the mobile phone cannot access the network, and thus cannot receive information from the mobile network, and cannot send information through the network to interfere with the mobile phone signal.