Can the shielding range of portable jammers be accurate to 1 meter?

 Many manufacturers of portable cell phone jammers will mark the shielding distance in their product descriptions, and this distance value is generally not marked as an exact value, but usually an approximate number or a range of values. Why is there such a marking method? Some buyers will even ask questions: Can the shielding distance of portable mobile phone jammers be accurate to 1 meter?

To find out the answers to these questions, we must first understand some basic characteristics of wireless signal transmission and coverage range (distance).

10 high-power antenna portable GSM 3G 4G GPS Wi-Fi 315 433 868MHz mobile phone signal jammer

The shielding signal emitted by the portable mobile phone jammer is a radio frequency signal that overlaps with multiple working frequency bands of the mobile phone. This radio frequency signal is disordered and has no specific content or fixed format, which is commonly known as the "white noise" signal. However, its signal transmission method and characteristics are consistent with the characteristics of general wireless signal transmission, that is, as the signal transmission distance increases, its signal strength will gradually decay. If obstacles are encountered in the transmission path, they will be affected by the material properties and appearance size of the obstacles, resulting in penetration, attenuation or refraction, reflection and other phenomena.

However, if there are no obstacles in the transmission path, the signal attenuation process is relatively continuous and smooth, and the signal will not suddenly attenuate a lot or disappear to zero at a certain distance.

Let's go back to the original question: Can the shielding distance of a portable mobile phone jammer be accurate to 1 meter? From the previous description, it can be known that in an unobstructed line-of-sight environment, it is definitely impossible to accurately control the shielding signal of a portable mobile phone jammer within a range or distance of 1 meter. The only feasible method is to use or utilize obstacles in the environment, and such obstacles must have a sufficiently large attenuation capacity, such as a completely solid reinforced concrete wall.

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