dojammer's blog
Cell phone jammers can not only interfere with mobile phone signals, but also interfere with radio signals in other frequency bands by adding interference modules of different bands. Everyone knows that radio signals can achieve different functions according to the different frequencies used, including GPS, WiFi, etc. Because of the differences in radio technology and standards, as well as the differences in signal strength emitted by the signal transmitter of the radio signal, the interference range of cell phone jammers will be different when interfering with these radio signals.
At present, the signal frequency that can be used by domestic mobile phones ranges from 700M to about 6000M, including signals from mobile phone operators, WiFi signals, GPS signals, etc. According to the different types of signals, they are divided into various uses, and the functions achieved are also different.
The interference range of mobile phone jammers for mobile phone signals of different frequency bands is also different. In the same test environment, the mobile phone signal strength of each frequency band cannot be the same. However, mobile phones can receive mobile phone signals of multiple frequency bands at the same time according to different operators to ensure that the mobile phone can be used normally. At this time, it is necessary to test the frequency band of the strongest mobile phone signal on the scene, and then adjust the cell phone jammer or adjust the signal source, and then cover the mobile phone frequency band with the strongest signal on the scene. Then, it can be basically determined that the mobile phone jammer can interfere with the ability of all mobile phone signals on the scene.
In certain cases, the above solutions are relatively expensive. In order to save costs and pursue higher cost-effectiveness, the following solutions can be considered
Test the relatively strong frequency bands on the scene, and then equip high-power interference modules to carry out targeted interference on these strong signal frequency bands, thereby reducing costs and achieving the purpose of interference effect.
Customers often ask in what kind of environment can the effect of the cell phone signal jammer be maximized? Why do mobile phone signal jammers not work well in some places, or the shielding effect is relatively poor? In fact, this is closely related to the electromagnetic environment around the place where the jammer is used. So in what environment will the shielding effect be relatively poor?
1. The environment where the mobile phone signal jammer is used is not transparent, there are many compartments, or walls are blocked. This is because the penetration of wireless signals is relatively poor, which depends on the frequency of the transmitted signal. The higher the frequency, the worse the penetration, or diffraction performance.
2. The place where the jammer is used is close to the base station. The mobile phone signal will be relatively strong in places close to the base station. If the jammer wants to shield the mobile phone signal, the signal strength of the emitted signal must be stronger than the mobile phone signal on site, so that the mobile phone signal can be shielded.
3. There is an indoor signal distribution system in the building where the mobile phone signal jammer is used, commonly known as a mobile phone signal amplifier. The place with a mobile phone signal amplifier is similar to the place close to the base station. If you want to shield the mobile phone signal, the jammer needs to have a larger transmission power.
When using a mobile phone signal jammer, you need to pay attention to the distribution of base stations around the site of use and confirm whether there is an indoor signal distribution system in the building. If there are too many compartments, multiple jammers are needed to cooperate with the shielding. If the base station is close, you can coordinate with the operator to adjust the direction of the base station antenna plate, so that the mobile phone signal strength at the site can be reduced, thereby improving the shielding effect of the jammer. In an environment with an indoor signal distribution system, when using the jammer, let the user turn off the power of the indoor signal distribution system to reduce the signal strength, which can improve the effect of the jammer to a certain extent.
