# Is it possible to make the shielding distance of the mobile phone signal jammer reach more than 1000 meters?

From the known product information of various cell phone signal jammer manufacturers, we can hardly see any product that can claim that its effective shielding distance can reach more than 1000 meters, and in the project consultation we usually receive In the problem, customers often ask us to purchase or customize a special mobile phone signal jammer. There are no other restrictions, but there is only one requirement: that is, it must be able to effectively shield the distance of 1000 meters. The question arises: Is it possible to make the shielding distance of the mobile phone signal jammer reach more than 1000 meters?

Customers who ask us for such a request sometimes give an analogy: the coverage radius of some mobile phone base stations can reach 2-3 kilometers, and the high-power cell phone signal jammer also emits radio frequency signals, and its effective shielding distance Is it difficult to reach more than 1000 meters?

The reality is: under the condition of acceptable and reasonable production cost, it is almost impossible for conventional high-power mobile phone signal jammers to achieve an effective shielding radius of 1000 meters or longer. A difficult problem to realize.

First of all, let me explain that the base station of a mobile phone can cover a radius of 2-3 kilometers, or even farther, because the frequency bandwidth of the base station is limited. Usually, the transmission power of the base station is 20W or greater, but the base station’s The bandwidth of the frequency band is not large. The traditional 2G bandwidth is less than 1MHz bandwidth, and the frequency bandwidth of 3G and 4G is only 4MHz to 20MHz. Under the effect of high power and narrow bandwidth, the mobile phone signal covers a range of several kilometers No surprise. But in the 5G era, the bandwidth of 5G will reach dozens of MHz or even 100MHz. Friends who understand the technical performance of 5G will also know that the mobile phone signal coverage of 5G base stations generally cannot reach more than 1,000 meters. This is why the construction of 5G base stations is becoming more and more intensive and the number is increasing.

The high-power mobile phone signal jammer also encounters this problem. If it wants to ensure sufficient mobile phone shielding effect, the shielding signal emitted by it must be 3-5dB or more higher than the signal of the mobile phone base station. However, the mobile phone Each signal shielding module in the signal jammer is output by a broadband signal, and the frequency bandwidth of almost every shielding module will exceed 50MHz or even 100MHz. Even if the total power of the modules is 50W or even 100W, the average output power value of each module will be reduced due to the large bandwidth.

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