A standard frequency jammer requires simultaneous and effective interference across all 2G, 3G, 4G, and 5G frequency bands. Therefore, no less than 10 frequency jammer modules are generally installed inside, with each shielding module corresponding to a mobile phone frequency band. In a conventional frequency jammer, which frequency band modules can be interchanged and adjusted universally?

We should first have a rough understanding of how current mobile frequency bands are distinguished and what frequency values are occupied by each mobile frequency band.

Let's analyze in detail the characteristics of frequency band division between 700MHz and 3600MHz. In this large bandwidth range close to 3000MHz, the mobile frequency band is not fully occupied, but is mainly distributed in several intervals. These sections are: 700MHz, 800MHz, 900MHz, 1800MHz, 1900MHz, 2000MHz, 2100MHz, 2300MHz, 2500MHz, 3400MHz, and so on. As a manufacturer of frequency interference meters, when designing and developing shielding modules for various mobile phone frequency bands mentioned above, based on the matching parameters of electronic components such as power amplifiers and signal sources, some of these frequency bands will be merged or shared with the same set of devices. Among these frequency bands, the most common frequency bands that share a set of devices are 800MHz/900MHz, 1800MHz/1900MHz, 2000MHz/2100MHz, 2300MHz/2400MHz, 2500MHz/2600MHz 3400MHz/3500MHz, etc.

According to the internationally recognized mobile communication frequency band classification standards and our actual domestic implementation standards, as of the end of 2022, the frequency range occupied by our known mobile communication frequencies is between 700MHz and 4960MHz. Among them, 4800MHz-4960MHz is the 5G band classified as China Mobile and China Radio and Television, but this band belongs to the Super high frequency mobile phone band. At present, there is no plan for large-scale promotion and deployment in China, but it is only deployed as a special communication network in some specific places. So conventional frequency jammers generally do not need to consider configuring the 4800MHz mobile phone interference module for the time being. After excluding the 4800MHz frequency band, the communication frequency band of mobile phones is actually mainly distributed between 700MHz and 3600MHz.



From the frequency band parameters listed above, it can be concluded that although a frequency jammer may have more than 10 different interference modules, there may actually be at least 4 to 6 module groups of the same style among them. The 2 modules in each group can be interchangeably adjusted and covered. However, during factory debugging, they will correspond to their respective mobile phone frequency bands by adjusting frequency offset and bandwidth.