Electromagentic signal sent by jammer are totally used in the band that regulated by government and just have interception effect to cell phone communication

The intensity of electromagnetic signal sent by jammer is in compliance with the national standard of environmental electromagnetic wave health,the signal sent by jammer is relatively small and no damage will appeared on human body according to the testing files.

the effective distance of interception is related to the surrounding environment as the distance between different base statins,positions of installstion,ect.

RF jammer is used for RF signal jamming. The types of RF signal jammer techniques, mobile jammer block diagram and RF jammer manufacturers are mentioned.

RF jamming is the concept used to disrupt the transmission of a particular radio or satellite station. As a result of RF signal jamming, the desired wireless signal can not be received or decoded properly at the wireless receiver station.

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Pj= RF Jammer Power
Pt= Transmitter power
Gjr= Antenna Gain from Jammer to the receiver
Grj= Antenna Gain from Receiver to the Jammer
Gtr=Antenna Gain from Transmitter to the receiver
Grt= Antenna Gain from Receiver to Transmitter
Br= Communications receiver Bandwidth
Bj= Jamming Transmitter Bandwidth
Rtr= Range between communication transmitter and receiver
Rjr= Range between Jammer and communication Receiver
Lj= Jammer Signal Loss, this includes polarization loss
Lr= Communication signal Loss