Cell phone jammers and base stations are mutually suppressing

Contemporary communication technology adopts excellent anti-jamming technology, such as frequency hopping, immediate code sequence spread spectrum communication (DSSS) and other technologies. However, the key to suppressing the effects of frequency hopping and spread spectrum communication is high frequency filtering, but it is because of high frequencies. Amplifiers and mixers are discrete system components that, when strongly influenced, can cause intermodulation effects and noise vicious changes that block the RF front end. In addition, there are many technical aspects of communication impact, such as broadband network noise impact, partial frequency band noise impact, multi-tone impact, frequency offset impact, tracking impact, intelligence impact, etc. Mobile cell phone signal jammer only need to ensure that the shielding of communication data signals is completed within a certain small range, so it is generally easy to affect the frequency range that can only be covered.

Many customers called me and said that I needed a mobile phone signal jammer, which can block mobile phones, with a radius of 50 meters, an interval of 500 meters, and a radius of 1 km, and it must be blocked by China Mobile, China Unicom and China Telecom. Is there a problem with the client’s request? No problem, the specific interval requirements are also given, but can it be completed? The answer is more difficult to achieve. Why is it harder to achieve? Isn’t the shielding interval marked in the parameters of the mobile phone jammer, can it be done by placing a few more sets according to this interval? In fact, this is not the case. The customer is not wrong, but they do not know that the shielding plan of the signal jammer is not a fixed value. How to understand it. The signal jammer scans from the low end of the channel to the high end at a certain speed during operation. This scanning speed will cause garbled interference in the SMS signal received by the mobile phone, resulting in the mobile phone being unable to detect the normal microwave signal sent by the cell tower.

Data, within a certain plan, prevents the mobile phone from establishing a connection with the signal tower, so as to achieve the purpose of shielding the mobile phone signal. Simply put, the frequency announced by the cell phone jammer interferes with the frequency of the cell phone reception tower. Cell phone jammers and cell towers are destined to be competing connections. If the transmit power of the mobile phone jammer is lower than the signal tower in the environment at that time, the channel power of the mobile phone, then the mobile phone signal jammer cannot be shielded, only the power of the mobile phone signal jammer is greater than the power transmitted by the signal tower to the mobile phone, can it be effectively shielded.