There are many things we don't understand in our lives, such as the basic concepts of cell phone jammers. Let's learn about them below.

Mobile phone signal jammers have received unanimous praise from consumers. The earliest jammers were not actually developed for examination scenarios. In fact, the earliest use scenario was applied to prisons. Prisons require physical and information security shielding. In order to ensure the information security and privacy of prisons, it is necessary for prisons to isolate the communication signals between prisons. This is the original intention of signal jammers. When the signal jammer was first invented, the whole world had only developed to the 2G era. At that time, although there were three operators in China, mobile phones actually used the second-generation network communication technology. The communication frequencies of mobile phones used by manufacturers of different standards are quite different.

1. Current situation:

1. The location of the shield is very demanding, which is time-consuming, labor-intensive, and ineffective;

2. The shielding area is seriously wrong and has been reported by nearby residents, so it cannot be used normally;

3. Over-trust in detection and pseudo base station technology, there is a difference between ideal and reality. At present, there is no truly successful example in China;

2. Misconceptions:

① Using directional antennas can prevent interference

1. There is also a certain signal strength outside the fixed angle of the directional antenna, which is just much lower than the main lobe, and it is not completely fixed;

2. The reflective surface of the building will still cause external interference;

3. The frequency fluctuation of the server seriously affects the communication base station, causing external interference;

4. TD full-time shielding interference must exist.

②The higher the power, the better

1. The server frequency output is inaccurate, the frequency fluctuates, the network bandwidth is too wide, the power is wasted, and the communication base station interferes;

2. The shielding efficiency of the simple frequency deviation power suppression method is not high, and the radiation source is relatively large;

3. The power is falsely high, the publicity is exaggerated, and the standard power loses its practical value;

4. Power is the basis, and technology is the key. It is better to find good methods and methods than to fight for power;

③ High-power equipment has large radiation, and low-power radiation is small

1. High-power uses antenna function, which has a long working distance, a large shielding coverage, and a uniform shielding signal, but the radiation source is particularly small;

2. If the low-power equipment does not use multiple antennas to extend the distance shielding, but is centralized or 5 antennas work together, its radiation power will exceed 10 microwatts/cubic centimeter, and the close-range radiation source will inevitably be seriously exceeded; mobile phone signal jammer