All the examinations in the past dynasties have been fraudulently conducted. With the development of science and technology, more and more people cheat using mobile phones. It has become an increasingly important issue in the education sector. In order to ensure the information security of the examination room, some ordinary colleges and universities generally use signal jammers to interfere with external signals within a certain range. Today, I will talk about the working principle of the interference equipment and how it interferes with mobile phone signals.

Let's first understand what is a signal jammer. Mobile phone signal jammer is also called mobile phone signal blocker, and Signal Jammer refers to a jamming device specially designed for the signals near the examination room. Its working principle is to implement the same frequency signal interference on the wireless network used by the communication equipment, so that it cannot be connected to the network normally, so as to achieve the purpose of interference. The jammer only interferes with the signal of the mobile phone and has no impact on other electronic devices. It should be noted that in order to realize the jamming of the jammer on the mobile network, it must be ensured that the signal field strength sent by the jammer is far greater than the field strength of the mobile signal BCH in the jamming area. The closer the jamming site is to the base station, the stronger the BCH field strength and the smaller the effective jamming area.

How does the Signal Jammer interfere with the mobile phone signal? In fact, when using a mobile phone to talk, the communication signal is used to contact the base station to realize the call. The signal jammer is equivalent to releasing a piece of interference magnetic field, making the mobile phone in this area disconnected from the base station and unable to talk.