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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They overload an area with signal, but modern communication systems are really good at selecting signal from noise. Think about a crowded city and how many people are using cell phones, each phone knows how to “listen” for a specific set of signals and ignore all the others. In order to effectively jam signals, these systems have to “listen” to what frequencies are in use, and rapidly create noise before the system switches to another frequency. If the noise is similar to digital signal, it is most effective.
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