How is the performance of cell phone signal jammers in penetrating walls? from dojammer's blog

Can cell phone signal jammers shield through walls? To answer this question, we need to look at several situations.

First, let's look at the cell phone signal jammer itself. The mobile phone jammer transmits a wireless radio frequency signal specifically for mobile phone signals. When it encounters a wall in the transmission path, part of the signal will be reflected back, and part of the signal can directly penetrate the wall, but the signal strength will be attenuated to a certain extent. And facing different walls, the attenuation degree of mobile phone jammers is also different. For example, the wall is a reinforced concrete wall or a brick-concrete wall. If there is a reinforced concrete wall and two consecutive brick-concrete walls, the interference signal emitted by the mobile phone signal jammer is basically attenuated, that is, it cannot be used through the wall. Therefore, the signal emitted by the mobile phone signal jammer usually cannot penetrate the wall. After all, the shielding signal (wireless signal) is not an X-ray, and it does not have the ability to penetrate directly. There will be a certain refraction and reflection when encountering the wall.

Different wall materials have different attenuation levels for cell phone jammers. For example, if the wall is made of light steel keel gypsum board, its attenuation is small. Similarly, glass, wooden doors, etc., have small attenuation. In addition, if the signal of the mobile phone jammer is refracted through the open space of doors and windows or through the reflection and refraction of the wall, it will have some impact on the mobile phone signal behind the wall, which makes people feel that the mobile phone signal jammer has the illusion of penetrating ability.
Of course, the size of the wall penetration ability is also related to the transmission power of each frequency band of the mobile phone jammer. Generally speaking, the greater the transmission power, the stronger the penetration ability, just like listening to the sound next door through a wall. If the sound next door is loud, then you can hear it more clearly, and if the sound next door is small, you basically can't hear it.
The wall penetration ability is also related to the frequency of the wireless signal transmitted by the mobile phone jammer. As we all know, the lower the frequency of the wireless signal, the stronger the diffraction performance, just like the radio station we usually listen to. The frequency transmitted by the radio station is basically tens of megahertz to more than 100 megahertz, and the frequency is very low. A transmission tower can cover more than 100KM. The lower the frequency of the wireless signal, the stronger its penetration ability will be.

Therefore, when using a cell phone signal jammer, if you can determine that the wall is made of gypsum board or wood board, you can choose whether to install it on the wall. If the wall is brick-concrete or steel-concrete, it is not recommended to install the cell phone jammer on the wall.