With the widespread use of mobile communication terminals, namely mobile phones, low-power signal shielding equipment has also been widely used. There are many types of mobile phone signal jammers, which are divided into different categories according to power, signal type, shielding direction, etc. The frequency band formats covered by their interference signals are gradually transitioning from 2G and 3G to today's 4G, 5G, etc.

The shielding effect of mobile phone signal jammer is different in different environments. The radio frequency signal specifically targeted at mobile phone signals will weaken when encountering obstacles in the transmission path, and the degree of attenuation of different obstacles is different, such as when facing steel and concrete. of the entire surface. A wall or brick and concrete wall, a reinforced concrete wall, two brick and concrete walls in a row can completely attenuate the strength of a shielded signal. After all, the signal does not have the ability to penetrate directly, and there will be corresponding refraction and reflection when encountering walls.

Different wall materials have different attenuation of shielded signals. If the wall material is light steel keel gypsum board, its attenuation will be very small. Similarly, glass, wooden doors, etc. have small attenuation, and the shielding signal will also be directly irradiated through the open space of doors and windows or have an impact on the back of the wall through reflection and refraction of the wall. If you want the signal to pass through the wall, you still need to look at the material of the wall.

If there is a base station near the shielding site, the effect will be affected. Of course, if the base station is 500 meters away from the examination room, the impact on signal blocker will be very small. As for the reason for the impact, this is because when the base station itself transmits signals to the surroundings, it carries strong electromagnetic signals. As the distance of the electromagnetic signal emitted by the base station increases, the field strength of the electromagnetic signal will decrease accordingly, and the field strength of this electromagnetic signal is one of the important factors affecting the anti-interference effect of the shield.

The above are the effects of shielding range in different environments. The location environment, building materials, base station distance, etc. have corresponding effects on the shielding effect. Before purchasing a mobile phone signal jammer, you may wish to conduct an actual test to determine the shielding range, and then make a decision based on the actual test. How many devices are needed to avoid some places being unshielded.