The mobile phone cannot break through the shielding of the jams cellphones
There are two key points in this issue, one is the mobile phone and the other is the frequency band used by the mobile phone. Normally, mobile phones are normal devices on the market, which are health meters, and their power is within a certain range. Second, the mobile phone uses the operator's network, which means that the frequency band that the mobile phone can support is the frequency band used by the operator. Therefore, under normal circumstances, ordinary mobile phones cannot break through the shielding of mobile cell phone jammer. Because the mobile jams cellphones mainly suppresses the operator's frequency band, the mobile phone cannot communicate with the base station in this frequency band. If you want to break through, there are two ways: 1. Use frequency bands that are not within the shielding range of mobile phone jammers; 2. Use super high-power communication between base station and "mobile phone"
Whether it is a large jams cellphones or a small signal jammer, its principle is to interfere with the mobile phone to receive the normal frequency sent by the base station through its own frequency, so that the mobile phone cannot contact the base station, thereby achieving the purpose of shielding. The only way to use the mobile phone is to install a mobile phone signal amplifier in the place where the mobile phone signal jammer is used to counter it. When the mobile phone signal becomes stronger, the mobile jams cellphones will be more difficult to shield.
The principle of signal interference is that the corresponding frequency band transmits high-power garbage signals to cover the past. The mobile phone power is less than 0.5 watts. The corresponding frequency bands are also public. A 5W device covering the mobile phone communication frequency band can send a full-power meaningless signal. The signal that the mobile phone communicates with the base station. In this case, the mobile phone is no way, but you can use radio UHF and VHF to communicate. However, for the common civilian radio frequency bands of 136-174 400-470, monitoring and interference are not difficult.