Due to the precedent of communication equipment fraud in the college entrance examination in recent years, in order to completely eliminate such phenomena, military jammers have been widely used. So what is the principle of military interference equipment used in the college entrance examination? In fact, this is equal to the time it takes for your phone to send and receive information, and the signal jammer is like an oversized horn, the "noise signal" output is too large, and the phone cannot hear the signal. In short, the function of the shield is far from blocking the mobile phone signal, but jammer signal. Equivalent to the use of electromagnetic signals useful in a large number of harmful signals.
Although the telephone is used whenever a wireless communication device is used, it also drags invisible lines as a mobile phone base station. Mobile Phone The first step in making or receiving a call is to first establish a connection to a nearby mobile phone base station. If your left and right hands are a mobile phone and a left-handed phone calls a right-handed phone, the electromagnetic waves of the mobile phone will not be transmitted directly from the left hand to the right hand, but so simple, but it will be hundreds of meters from the phone to the left Roundabout. This is why the signal in the examination room was disturbed. The military signal jammer interfered with the calls of mobile phone users around the examination room, and the call quality became poor. For the flowers of the motherland, please support everyone for a few days.
But is this jammer really effective? The entire frequency range of electromagnetic waves is from a few Hz to a maximum of several hundred GHz, and the range is very large. Each segment can be used as a communication signal. This kind of incomplete sound shielding can only block a small number of band communication tools that can use band unshielded frequencies for communication. Therefore, it is imperative to increase the number of military jammer and try to maintain coverage of all areas, or to use high-quality military WiFi jammers with a wide interference range.