How The Jammer Works?

Wireless communication must ensure sufficient carrier-to-interference ratio (signal-to-noise ratio) in order to receive effectively then complete the communication. The mobile communication signal jammer destroys the reception conditions of the mobile phone and cuts off the communication connection between the mobile phone and the base station by generating interference signals with the same frequency as the mobile phone receiving, to achieve the effect of shielding communication.

The interference power of the jammer is fixed, and the shielding radius of the unobstructed space is determined by the path attenuation and the signal level of the receiving base station. The following table shows the comparison table of distance and path attenuation. Then, the coverage radius can be determined by the output channel power of the jammer, the base station signal level, and the coverage line gain. As follows:

Pch+Gat-L+FAFPrx

Pch: Minimum channel power output by the jammer

Gat: Coverage antenna gain

L: Path attenuation

FAF: Path loss additional value, take 6dB

Prx: Base station signal strength

 

Distance and attenuation comparison table

L900=32.5+20logd +FAF     L1800=L900+6    d:distance (meter)

 

Distance(m)900MHz

Attenuation(dB)

1800MHz

Attenuation(dB)

3G-4G

Attenuation(dB)

Distance(m)900MHz

Attenuation(dB)

1800MHz

Attenuation(dB)

1384451257076
2445057307278
3505663357480
4546069407581
5566275457682
6586481507783
7606687607884
8616757708086
9626863808187
10636969908288
156470741008289
206874802008490

 

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