How to Determine the Quality of Full-Band Signal Blockers


When purchasing a full-band signal blocker, relying solely on appearance is often insufficient to determine the quality of the device. Many people worry about buying signal blockers of poor quality. This article will introduce how to distinguish the quality of signal blockers.

Factors to Consider When Evaluating the Quality of Full-Band Signal Blockers

Subtitle 1: Internal Structure and Components

The most direct way to determine the quality of a full-band signal blocker is to disassemble the device and examine its internal structure and components. It is important to assess whether the design is reasonable, scientific, and takes into account the product’s usability, durability, and practicality. By inspecting the internal structure, one can also determine whether the manufacturer is reputable and whether the components on the PCB board are second-hand. If a manufacturer uses such components, they should be added to the blacklist.

Subtitle 2: Brand Reputation

Currently, there are numerous brands of signal blockers on the market, but only a few have both strength and reputation. Consulting multiple brands and accumulating professional knowledge can play a crucial role in evaluating the quality of signal blockers. For example, different full-band signal blockers may have varying interference methods, interference ranges, and the ability to cater to specific frequency bands or customize signal blockers for different application scenarios.

Subtitle 3: Compatibility with Surrounding Products

Different signal blocker products may have varying functionalities depending on the application scenario. There are many imperfect mobile signal interference devices on the market that have eliminated certain optimized signal circuits, such as automatic gain control. Some substandard interference devices have significant functional differences, which can lead to the inability to meet requirements in specific usage scenarios. Therefore, it is important to ensure that the surrounding products of a full-band signal blocker can fulfill the necessary functions.

Subtitle 4: Professional Knowledge and Testing Instruments

If one has accumulated a certain level of professional knowledge and possesses testing instruments such as a spectrum analyzer, it is possible to use the analyzer to examine the output waveform and signal strength of the interference signals emitted by the full-band signal blocker. Additionally, direct testing of the interference range of the signal blocker can be conducted. By meeting the necessary requirements, one can avoid falling into pitfalls during the purchasing process.


When selecting a full-band signal blocker, it is crucial to consider factors such as the internal structure and components, brand reputation, compatibility with surrounding products, and the ability to conduct professional testing. By taking these factors into account, individuals can make informed decisions and ensure the purchase of high-quality signal blockers.