The shielding range marked in the technical indicators of conventional mobile phone jammers usually refers to a transparent environment. For example, in an indoor room, under normal circumstances, a jammer can cover the entire room, but some customers will also propose some other application scenarios: when the user of the mobile phone jammer starts working in a room, it can The area that really needs mobile phone signal shielding is the room next door or the room further away. Then the question arises: Is it possible to shield mobile phone signals across several rooms in reality?

To understand and solve the above problem, we need to analyze it from two angles: the first angle: the radio frequency signal emitted by the mobile phone jammer, the ability to pass through the wall during the transmission process of the partition. The so-called wall-penetrating ability of radio frequency signals is actually the attenuation ability of wireless signals for different wall materials. To realize mobile phone signal shielding, it is necessary to require the shielding signal of the mobile phone jammer to be strong enough to minimize its attenuation during transmission. But if it is unavoidable to encounter the obstruction of the wall, a part of the wireless signal will be directly reflected or refracted, and only a small part will directly penetrate the wall. And the size of the penetrating ability depends on the material of the wall. The well-known reinforced concrete walls are much more attenuated by radio frequency signals than conventional brick walls. The attenuation capacity of brick walls is much greater than that of wooden walls or glass walls. If there is a room in the middle, it means that the radio frequency signal needs to penetrate at least two walls. Unfortunately, after passing through two reinforced concrete walls, the shielding signal of the mobile phone jammer can basically be attenuated to a very low level. To a certain extent, it is basically impossible to achieve mobile phone signal shielding.

The second angle is the strength of the mobile phone signal environment on site itself. Because the effect of mobile phone signal shielding is related to the signal strength of the mobile phone base station received at the scene, that is, when the mobile phone base station is farther away, the mobile phone signal at the scene will be quite weak. At this time, when using a mobile phone jammer , the effect of mobile phone signal shielding will be very good. But looking at the situation the other way around, if the mobile phone base station happens to be very close to the scene, it is already relatively difficult to use a mobile phone jammer to shield the mobile phone signal in the room where you are. In this scenario, you still hope that the radio frequency signal can pass through. The wall, and also achieve the effect of mobile phone signal shielding for adjacent rooms, which is obviously unrealistic.