With the gradual development and progress of society, the innovation of science and technology is becoming more and more intelligent, and the popularization of mobile Internet has brought a lot of convenience to people’s daily life. Of course, while bringing convenience, there are also many negative effects. In some special occasions, the use of mobile phones has occurred frequently, which has become a new channel for secrets and criminal methods. pose a serious threat to information security. Therefore, we need to strengthen the strict supervision of information security work, so we have installed mobile phone signal shielding devices in special areas for management.
To complete the interference of the mobile cell phone jammer to the mobile data network, it is necessary to ensure that the signal magnetic field strength from the mobile phone jammer is much higher than the magnetic field strength of the mobile signal BCH in the interference area. The closer the interference address is to the communication base station, the stronger the BCH magnetic field strength is The stronger it is, the smaller the reasonable interference area will be. On the contrary, the farther and farther the interference address is from the communication base station, the weaker the BCH magnetic field strength will be, and the larger the reasonable interference area will be. It is not difficult to see that within a certain signal strength, the interference range lies in the BCH magnetic field strength in the interference area. No matter how powerful the jammer is, as long as the signal strength is a time constant, as the distance increases, the compressive strength of the interference signal will gradually increase. Loss, and then the lack of interference work ability, in other words, mobile phone jammers always have a reasonable interference range. But in the cases of jammer interference solved in recent years, it is usually a large-scale interference caused by the application of mobile phone jammers. What is the reason?