Drone jammer, many people have heard the name. But how does the device work and how does it work? Perhaps few people know. Therefore, today we specially invite experts to answer for us.
In order to interfere, the jammer transmits radio frequency power (CW + modulation) at the same frequency used by the enemy link or network. The enemy's receiver ("listening" side) receives both the jammer's transmission and its "partner" transmission. The strongest will prevail; if the power of the jammer is greater than the power of the "partner", the "listener" will not be able to "understand" the message/data correctly. Or, if the capabilities of the "partner" are greater than the capabilities of the jammer, the "listener" may be able to correctly "understand" the message/data, and the communication link between the "partners" will remain uninterrupted. This explanation is a bit superficial and aims to simplify things. However, if we try to "deep" this problem, we can compare the signal levels of the two "links" to get more parameters. An example is the SNR (signal-to-noise ratio) that the receiver "sees" on its input. Sometimes, the interference signal arriving at the receiver input may be lower than the communication signal ("partner") and still dominate. This happens because the receiver usually requires a certain amount of "headroom" between the two input signals to explain one of them (usually louder). However, in advanced communication systems, this "headroom" is sometimes even negative (meaning that the communication signal may be much weaker than the interference signal), and the receiver is still able to.