Mobile phone signal blockers, also known as cell phone jammers, are devices designed to block or interfere with mobile phone signals. These devices are categorized into three power levels: low-power, medium-power, and high-power. The power level determines the range and effectiveness of the signal blocker. In this article, we will focus on the effectiveness of low-power signal blockers when installed outdoors.
Power Levels of Mobile Phone Signal Blockers:
Mobile phone signal blockers are divided into three power levels. The first level is the low-power type, which refers to signal blockers with an emission power of 2-3W or below. The second level is the medium-power type, with an emission power ranging from 10-20W. The third level is the high-power type, with an emission power of 50W or even 100W.
Choosing the Right Power Level:
The choice of power level depends on the application environment. In open and spacious outdoor areas, it is recommended to use high-power signal blockers. On the other hand, low-power signal blockers are suitable for indoor environments. Installing a low-power signal blocker outdoors is uncommon and only done in exceptional circumstances. In most cases, the effective blocking range of a low-power signal blocker outdoors is only 2-5 meters. This limited range is due to the lower emission power of the device, which fails to meet the expectations of customers.
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Signal Strength and Effective Blocking Range:
The actual blocking range of a mobile phone signal blocker is closely related to the signal strength at the location. The stronger the signal, the shorter the effective blocking distance. In general, outdoor environments have higher signal strength compared to indoor environments, typically at least 10dB higher. This is why some low-power signal blockers can effectively block distances of over 10 meters indoors but experience a significant reduction in blocking range when tested outdoors. When installed outdoors, the blocking range of a low-power signal blocker is only 2-3 meters. To achieve extensive coverage, a cellular network-based installation approach, such as a dense network of signal blockers, is required. However, this method is not suitable due to the need for a large number of signal blockers and the challenges associated with power supply and installation.
In conclusion, low-power mobile phone signal blockers are not as effective when installed outdoors compared to their performance indoors. The limited emission power of low-power signal blockers results in a shorter blocking range, which may not meet the requirements of customers. It is recommended to use high-power signal blockers for open and spacious outdoor areas, while low-power signal blockers are suitable for indoor environments. The choice of power level should be based on the specific application environment and the desired blocking range.