Scientific advancements have greatly benefited people’s lives, and the upcoming 5G era is expected to bring faster and better internet experiences. However, along with these advancements, there are also concerns. For instance, as signal quality improves, how should special areas that require signal blocking, such as examination halls, be managed? Does this mean that signal blockers have no future?
1. The Essence of Signal Blocking:
From a technical perspective, mobile signal blocking is just a small branch of wireless information blocking systems. Its essence lies in electronic countermeasures, also known as same-frequency interference. This involves using devices to emit high-frequency signals through antennas, causing mobile phones to experience errors and rendering them unable to recognize or connect to the network. As a result, the phones display a “no network” status, fulfilling the requirements of signal blocking.
2. Challenges of Full-Band Signal Blockers:
We are aware that full-band signal blockers interfere with the downlink, but 4G and 5G mobile networks do not differentiate between uplink and downlink. Due to various factors such as cost, price, and production limitations, it is difficult to achieve precise downlink interference. Consequently, some unscrupulous individuals, in order to enhance the blocking effect, do not accurately adjust the frequency range, resulting in partial interference with the uplink. While this significantly increases the interference range, it compromises the interests of the general public.
3. Complexity of Mobile Signal Blocking:
Mobile signal strength can vary significantly within the same indoor space, at different locations and times, with differences of up to approximately 10dBm. In terms of conversion success rate, this translates to a tenfold difference. Therefore, mobile signal blocking is a highly skilled engineering task that cannot be simply resolved by purchasing a full-band signal blocker and installing it oneself.
4. Specialized Approaches for Specific Locations:
In cases where signal blocking is required in large, cluttered environments, a combination of high-gain antennas for extensive blocking and small-scale indoor antennas for compensatory optimization should be employed. The installation and calibration of both the antenna viewpoints and the full-band signal blockers require the expertise of professionals. For short-term signal blocking within schools, high-quality low-power full-band signal blockers or temporary antenna placements can be used.
As we enter the 5G era, the demand for signal blocking in certain areas remains. While full-band signal blockers face challenges in terms of precise interference, there are specialized approaches that can be employed to ensure effective signal blocking. It is crucial to rely on the expertise of professionals to install and calibrate the necessary equipment. By doing so, we can strike a balance between the benefits of scientific progress and the need for signal control in specific environments.