Analysis of Frequency Bands in a Standard Full-Band Jammer

A standard full-band jammer is equipped with multiple signal interference modules to effectively block all 2G, 3G, 4G, and 5G frequency bands. Each interference module corresponds to a specific mobile frequency band. This article aims to explore the interchangeable frequency band modules in a conventional full-band jammer and provide an overview of the current mobile frequency band division.

Frequency Band Division:

As of the end of 2022, the known communication frequency range for mobile phones in China is between 700MHz and 4960MHz. The 4800MHz-4960MHz range is designated for China Mobile and China Broadcasting’s 5G frequency band, which falls under the ultra-high frequency category. However, this frequency band is not widely deployed in China and is only used in specific locations for communication network deployment. Therefore, a conventional full-band jammer can temporarily exclude the 4800MHz frequency band module from its configuration.

Analysis of Frequency Band Division:

The main distribution of mobile communication frequency bands lies between 700MHz and 3600MHz within the approximately 3000MHz bandwidth. Several key frequency intervals are occupied by mobile phone bands, including 700MHz, 800MHz, 900MHz, 1800MHz, 1900MHz, 2000MHz, 2100MHz, 2300MHz, 2500MHz, and 3400MHz. When designing and developing shielding modules for these frequency bands, manufacturers of full-band jammers combine or share components based on the matching parameters of power amplifiers and signal sources. The most common shared frequency band modules include 800MHz/900MHz, 1800MHz/1900MHz, 2000MHz/2100MHz, 2300MHz/2400MHz, 2500MHz/2600MHz, and 3400MHz/3500MHz.


In a full-band jammer, although there may be more than 10 different shielding modules, there are typically 4 to 6 groups of interchangeable modules. Each group consists of two modules that can be adjusted and cover multiple frequency bands. During factory calibration, these modules are fine-tuned by adjusting frequency offset and bandwidth to correspond to their respective mobile frequency bands. Understanding the frequency band division and the interchangeable nature of modules in full-band jammers is crucial for effective interference and signal blocking in various communication scenarios.