Why are the 5G mobile phone signal shielding devices used in the examination room basically low-power?

It has become a common practice to install wireless signal shielding equipment in the examination room, but the examination room generally chooses low-power shielding equipment, so why not use high-power mobile phone 5G signal jammers?

The examination room does not use high-power jammers based on factors such as product performance, application scenarios, and the structure of the examination room itself. The instruction manual of the high-power wireless signal jammer states that it is designed for outdoor open environments, while the examination room is an indoor environment with densely distributed rooms and partitions in the middle. The partitions will introduce signal shielding errors, resulting in limited signal coverage in specific areas or floors. Therefore, high-power wireless signal jammers are not suitable for installation in buildings, but should be installed at an appropriate distance around the building. In addition, to cover a building, multiple sets of high-power shielding equipment are required, usually 2 to 4 sets.

High-power wireless WIFI signal jammers are large in size and heavy in weight, have high requirements for heat dissipation and ventilation, and have high procurement costs. These factors make it difficult to choose high-power jammers for examination rooms. Low-power 5G mobile phone jammers are more affordable, while high-power ones are more expensive. The greater the RF transmission power of the jammer, the higher the cost.

The higher the RF transmission power value of the jammer, the greater the shielding range or distance. To achieve a higher transmission power, it is necessary to use a power amplifier with a larger output power, which is more expensive. Some shielding modules even use a multi-level power drive method, using multiple power amplifiers to increase the power output, which further increases the equipment and production costs.

The price of 5G mobile phone jammers is proportional to the shielding range. As the required range expands, the price of high-power jammers will naturally rise. Low-power shielding equipment commonly used in examination rooms or conference rooms on the market has a relatively low purchase price due to its large output, a small number of parts, a simple manufacturing process, and easy assembly. The increase in the cost of electronic components is not the only factor. The structure, appearance, heat dissipation, antenna and other supporting components of the product are also factors that cause the overall cost.

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