Understanding Full Band Signal Jammers: A Guide to Choosing the Right Device

Ensuring Fairness and Security in Controlled Environments

Full band signal jammers are products used for communication regulation, specifically designed to maintain a serious and quiet atmosphere in places such as examination halls, prisons, and detention centers. These devices play a crucial role in safeguarding the fairness of exams and ensuring security. When purchasing a full band signal jammer, it is important to consider the location of its usage and the size of the area that needs to be shielded. This article provides a comprehensive guide to help you choose the appropriate device based on your specific requirements.

Choosing the Right Power Level:

Full band signal jammers come in different power levels, including high power, medium power, and low power models. The power level is categorized based on the output of a single channel, such as 100W, 50W, 15W, or 3W. Selecting the appropriate power level depends on the area that needs to be shielded.

Indoor Usage:

For indoor environments like examination halls, conference rooms, and offices, low power models are suitable. These devices are capable of effectively blocking signals within a limited range. However, for outdoor open areas, high power signal jammers are required to cover larger distances.

Consideration of Area Size:

If the conference room exceeds an area of 1000 square meters, a medium power device with a single channel output of 15W is recommended. This ensures an effective shielding distance. When selecting a full band signal jammer based on the area size, it is also important to consider the type of antenna required, whether it is an external or internal antenna.

Differentiating External and Internal Antennas:

External antennas are typically used for high power devices, while internal antennas are more commonly found in low power models. External antennas occupy more space due to their outward extension, but they provide a more stable shielding effect. In terms of shielding range, small power signal jammers are commonly used in examination halls, with one device installed per classroom, covering an area of approximately 200 square meters. On the other hand, high power full band signal jammers can achieve a shielding distance of 300-400 meters, depending on the local signal strength.

Consideration of Device Size:

In terms of size, high power full band signal jammers are usually designed in a portable box or fixed box format, making them significantly larger. Conversely, low power desktop models are smaller and more portable.


Full band signal jammers are essential tools for maintaining fairness and security in controlled environments. By understanding the specific requirements of the location and the size of the area that needs to be shielded, one can make an informed decision when purchasing a full band signal jammer. Whether it is for indoor or outdoor use, selecting the appropriate power level and antenna type ensures effective signal blocking and contributes to a secure and regulated environment.