What are the misunderstandings about mobile phone signal jammers?
In today's society, everyone is familiar with all kinds of jammers, so everyone also knows about mobile phone signal jammers. In the past few years, various shielding devices have appeared on the market one after another. Everyone claims that their shields are particularly good, and the information is flooded with moisture, which confuses you. In this kind of moisture, it is inevitable that everyone will have some misunderstandings about the shielding device, so today I will tell you where the misunderstandings exist.
Everyone thinks that the greater the power of the cell phone jammer, the longer the range of use. In fact, this is not entirely correct. Many manufacturers use ordinary users so that the exact power cannot be detected, deliberately exaggerating the openness of the shielded power. Make the device's nominal power indicator lose its reference value. For large-scale mobile phone signal shielding systems, shielding technology is a decisive factor affecting the shielding effect. The advantages of advanced shielding technology are often greater than the output power of the shielding device.
Use directional antennas to avoid external interference with mobile phone signal jammers. This is also incorrect because the directional antenna covers the main lobe, side lobes and back lobes. The main lobe coverage angle is defined as the shielding angle of the mobile phone signal when the external power of the main lobe drops by 3dB. In other words, the radiation intensity of the side and back of the directional antenna is only much lower than the main lobe. Therefore, if the space close to the antenna is still relatively shielded, the reflection of the shielded building will still cause external interference. In addition, if it is used improperly, it will cause upstream interference and the interference range will be larger. Therefore, whether the equipment technology can meet the conditions, the application of the antenna and the debugging of the system are more meaningful than whether to use a directional antenna.
The distance of the mobile phone signal jammer is related to the strength and quality of the space signal. In short, distance is meaningless. For the same shielding power, if the distance at the weak point is 100 meters-70 decibels, then the distance at the strong 52 decibels is only 12.5 meters. The shielding distance is related to the antenna gain. The same power shielding host uses different gain antennas, and the distance will be very different. For example, the distance of an antenna with a gain of 16db is 100 meters, and the distance of an antenna with a gain of 4db is only 25 meters.
All in all, when choosing a mobile phone signal jammer, it must be combined with the actual situation of the on-site environment, and it must be tested by itself.
