Given the current concern around drones, it seems worth surveying possible countermeasures in a reasonably systematic way, looking at each category of possible solution and listing the pros and cons of each. Now, this is a big and rapidly-evolving area, and I'm not a specialist in it. But I have done some looking around, and it seems worthwhile to bring this up as a counter to a lot of the triumphalism around drones these days.

First, I'm going to limit the scope here to direct measures aimed at a non-cooperative drone. There are a lot of ways of reducing the drone threat that fall outside this purview, from blowing them up before they launch to compromising their software to simply not being within range, but that gets even more complicated and messy. Second, it's worth pointing out that there are many different scenarios where drones may need to be dealt with, and that some systems may work well in certain situations but not in others. For instance, broad-spectrum RF jamming is absolutely standard on the battlefield, but is not a particularly good first-line solution if you're trying to defend the White House. Read more...
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