Misunderstandings about the use of signal jammers: Misunderstanding 1: The greater the power of the mobile phone signal shielding device, the farther the shielding effect will be; Misunderstanding 2: Use a directional antenna to avoid external influences; Misunderstanding 3: The signal shielding distance is a hard indicator.
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The first point: the greater the power of the mobile phone signal shielding device, the farther the shielding effect will be
Is the greater the power of the mobile phone signal jammer, the better the effect? ​​In fact, this is not the case. For example, if a space is about 400-500 square meters, it is necessary to choose a mobile phone signal jammer with a shielding area of ​​about 600 square meters. It's not that more power is better. After all, the power of the professional cell phone jammer has a safe power range.
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In fact, this is not entirely correct. Many manufacturers use the fact that ordinary users cannot detect the actual power, and deliberately exaggerate the openness of the signal jammer shielded power, causing the nominal power index of the equipment to lose its reference value. For large shielding systems, shielding technology is the decisive factor affecting the shielding effect. The advantages brought by advanced shielding technology are far greater than the output power factor of shielded equipment.
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The second point is that directional antennas are used to avoid external interference. This is also incorrect because directional antennas cover 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. When the Wifi signal jammer uses a directional antenna, the transmission path and coverage of the interference signal emitted are really not the same as the form of light transmitted by a flashlight. If the signal transmission of the directional antenna is detected and modeled in 3D through a microwave anechoic chamber, we can intuitively see that there are still interference signals continuously emitted from the sides and back of the directional antenna. It's just that the signal strength and transmission distance in this area will be significantly lower than those in the front direction.
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The third point: the signal shielding distance is a hard indicator. Actually, distance is not an absolute value. It has to do with the strength and quality of the signal in space. Simply put, distance is meaningless. The same shielding power, if the distance is 100 meters - 70 decibels in the weaker place, then only 12.5 meters in the strong - 52 decibels. The actual GPS scrambler shielding distance is related to the actual use environment, not directly related to the distance. If the spatial signal strength is strong, the shielding distance is relatively short, otherwise the shielding distance is long. The shielding distance is related to the gain of the antenna. When the frequency of the shielding host is the same, the shielding distance will be different if the antenna with different gain is used.

Then there are some other misunderstandings:
1. The test panel signal monitor will have different effective shielding ranges in different places of use. This is closely related to the signal field strength at the site. Different types of mobile phones may not have the same shielding range on the same site, so choose according to the actual situation.
2. After the shield runs for a long time, it is normal that the surface temperature will rise above 40 degrees.

Finally, the distance from the place where the interference jammer is installed to the base station, the closer the distance to the base station, the stronger the mobile phone signal at this place, and on the contrary, the interference area of ​​the interference jammer will attenuate. Not only that, in different places, there are still many factors that affect the interference intensity of the interference jammer. When installing the interference jammer, we must also pay attention to the influence of the environment on site.

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