Where is the wireless jammer? Today, let's trace the origin of this artifact.
At first, the wireless jammer was not set up for the test scene. The initial application was actually prison.
In order to ensure the information security and privacy of the high wall courtyard of the prison, it is necessary for the prison to isolate the communication signals between the prison and the prison, which is the original intention of the wireless jammer.
When the wireless jammer was first invented, the whole world only developed to the 2G era. At that time, although there were three domestic operators, in fact, mobile phones used the second-generation network communication technology. The communication frequency of mobile phones used by manufacturers of different systems is quite different.
The ability of mobile phones to make and receive calls mainly depends on the support of communication base stations. After the mobile phone is turned on, it will actively connect to the nearest communication base station, which will be commanded by the communication base station when making and receiving calls. In fact, they are all exchanges with communication base stations. So what should the prison do if it wants to interrupt the communication between prisoners inside the prison and the outside world?
The answer is actually very simple. You only need a machine with the same frequency as the mobile phone to make noise, so that when the base station tries to connect to the mobile phone. You will find that the signals coming from the mobile phone are complex and illegible, so you will refuse to communicate with the mobile phone.
Based on this principle, everyone is happy after the wireless jammer was developed. The prison only needs to be equipped with several wireless jammers that can emit such noise to interfere with the mobile phone communication within the whole prison. As more and more scenes need interference signals. The wireless jammer originally designed only for use in prison has gradually entered the normal commercial scene, such as important meetings and exams.
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