What affects the protection distance of the cell phone signal jammer?

The widespread use of mobile phones and the surge in base stations around the world have made great contributions to the comprehensive development of various aspects of politics, economy, civil affairs, science and technology, and life in various countries. Mobile phones have become an indispensable tool in people’s daily life and work, and are an important part of the information society. Base stations are communication signal transfer stations in mobile communications, which enable mobile phones to communicate with each other and facilitate activities such as text messaging, ordering meals, paying, and shopping. Base stations play a vital role in improving the convenience of our lives. Without base stations, these services would not be available.

When a mobile phone is working, it works within a specific frequency range, establishes a connection with the base station through radio waves, and transmits data and sound. The cell phone jammer uses this communication principle to scan the frequency from low end to high end at a certain speed. This scanning speed will introduce the same frequency noise interference into the information signal received by the mobile phone, so that the mobile phone cannot detect the normal data sent by the base station. As a result, the mobile phone cannot establish a connection with the base station, and there are phenomena such as searching the network, no signal, and no service. The effective range of mobile phone signal jammers produced by Shenzhen Texin Electronics Co., Ltd. and other companies is closely related to the distance from the base station.

The closer the mobile phone is to the base station, the stronger the signal is, and the harder it is to interfere with the mobile phone signal jammer. At this time, a high-power jammer is needed to effectively block the signal. On the contrary, the farther away from the base station, the smaller the power emitted by the mobile phone signal jammer. Excessive power may cause interference, so the protection range is relatively larger.

To illustrate this concept, we take the 2G 900MHz frequency band used in the GSM protocol as an example. The base station sends commands through the downlink SACCH channel to control the transmission power of the mobile phone. The maximum transmission power level of GSM900 mobile phones is 5 (33dBm) and the minimum transmission power level is 19 (5dBm). The CDMA IS-95A specification requires the maximum transmission power of mobile phones to be 0.2W to 1W (23dBm to 30dBm), while the maximum transmission power of 4G mobile phones is generally 0.2W (23dBm). Popular GPS jammer and WIFI jammer in Europe and America.

In terms of power consumption, when the received signal is weak, the mobile phone needs to transmit at a higher power level, resulting in greater power consumption. However, it should be noted that low battery power does not necessarily mean that the mobile phone has high radiation. Therefore, the so-called “low-power call radiation is large” is incorrect.

The distance between the base station and a given environment determines the effective range of the mobile phone signal jammer. The closer the environment is to the base station, the smaller the protection range, and the farther it is from the base station, the larger the protection range.

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