Been in the news a lot lately. I’ve always assumed it just overloads an area with some sort of signal, but I know nothing about this kind of stuff so it’s a wild speculation.
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In it’s simplest form, to jam a signal (be it radar or communications) all you have to do is have a more powerful signal than the one they’re using. A receiver is only going to hear the most powerful signal on whatever frequency or frequencies they are using. It’s not hard *at all* to jam a particular frequency. The challenge comes from systems that use a range of frequencies. Depending on the type of radar, the frequencies can scale up and down at random to prevent speccific jamming. Some communicaiton systems have a frequency list that allows them to change to a different channel/frequency in the event of interference, while others “hop” from one frequency to the next, seemingingly at random (it isn’t random, but good luck figuring out the hop sequence without a supercomputer) and spending less than a second on each frequency. For that, you need a broad-spectrum jammer the wipes out a several megahertz worth of the frequency range.
But in the end it’s just one signal transmitting at a higher power than the one you’re trying to jam.
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