Considerations for Selecting and Installing Full-Band Signal Blockers in Examination Halls

Important Factors to Keep in Mind for Optimal Performance

As the exam season approaches, many schools have begun preparing for the purchase and installation of full-band signal blockers. The selection and installation of these products, as well as their positioning within examination halls, are crucial considerations. Different product models may vary in terms of functionality, usage, and installation methods. Therefore, it is essential for customers to pay close attention to these factors. This article aims to provide guidance on the selection and installation of full-band signal blockers, ensuring optimal performance during exams.

Selecting the Style of Full-Band Signal Blockers:

Currently, the mainstream products in the market adopt an internal antenna structure. This design offers several advantages, including a sleek and attractive appearance. Installation and usage are simplified, eliminating the need for complex assembly and connections. Simply connecting the power supply and switching on the main unit is sufficient. However, there are still some traditional external antenna-style blockers available, which have maintained their appearance for over a decade. It is recommended to choose the internal antenna style for its simplicity and aesthetic appeal.

Considerations for Installation:

A full-band signal blocker that supports 2G, 3G, 4G, 5G, and other frequency bands typically requires at least 10-12 omnidirectional antennas. However, individually attaching these antennas to the main unit can result in an unattractive appearance, resembling a “hedgehog.” Moreover, the exposed antennas are susceptible to damage and vandalism. If not installed using a fixed or wall-mounted method, each use would require the removal or tightening of individual antennas, increasing the workload and the risk of loose connections or malfunctions.

When installing full-band signal blockers in examination halls, the positioning is of utmost importance. If wall-mounted, it is recommended to install them at the upper ends of the blackboards on either side of the classroom, approximately 2-3 meters above the ground. This placement helps deter students from intentionally tampering with or damaging the blockers. Alternatively, they can be installed on the central walls of the classroom. In both cases, optimal coverage can be achieved.

For temporary and non-fixed installations, it is advisable to place the blockers above the teacher’s podium or in a corner of the classroom. A supporting surface such as a desk, chair, or bookshelf should be used to elevate the full-band signal blocker, ensuring a significant height difference from the ground. Placing the device on such a surface prevents signal transmission distance and coverage range from being significantly reduced.


Selecting and installing full-band signal blockers in examination halls require careful consideration. Opting for internal antenna-style blockers offers simplicity and an appealing appearance. Proper installation, whether wall-mounted or temporary, is crucial for optimal performance. By following these guidelines, schools can effectively prevent unauthorized use of mobile devices during exams, ensuring a fair and controlled testing environment.