The room has a great influence on the effect of the jammer

Due to the precedent of interrupting communication equipment during the college entrance examination in recent years, in order to completely eliminate these phenomena, signal jammers have been widely used. So what is the obstacle principle used during the college entrance examination? In fact, this is equal to the time it takes for the phone to send and receive information. The phone handheld jammer is like a big horn, the “noise signal” output is too large, the phone can not hear the “mouth” sound. , Also known as wifi jammer. In short, the job of the shielding layer is far from blocking the phone signal, but blocking it. It is equivalent to using useful electromagnetic signals in a large number of harmful signals.

Although a telephone is used whenever a wireless communication device is used, there are some invisible wires that are used as base stations for mobile phones. The first step for a mobile phone to make or receive a call is to first establish a connection with a nearby mobile phone base station. If your left and right hands are mobile phones, and the left-hand phone calls the right-hand phone, the electromagnetic waves from the phone will not be transmitted directly from the left hand to the right hand, but very simple, but will be one hundred yards from the phone to the left roundabout.

This is why the signal in the examination room is disturbed. This seriously disturbed the mobile phone users in the examination room, and the quality of the call deteriorated. For the motherland flower, please support a few days. But is this mask really effective? The entire frequency range of electromagnetic waves is from the smallest Hz to the largest hundreds of GHz, which is very wide. Each part can be used as a communication signal, but some special general protective equipment “skills not enough”, “five” “incomplete sound” shielding can only block a few safety tools. The communication frequency band of the unshielded frequency band communication frequency can be used. Therefore, it is necessary to increase the number of jammers and try to continue to cover all areas to get it away…