Interesting! Makes sense. But once we've detected a drone, what do we do about it?
Flight operations would still have to be shut down, and tracking the drone itself via radar wouldn't necessarily make it any easier to locate the drone operator. And the FAA recommends against countermeasures that could cause the drone or projectiles fired at it to fall to the ground. So a single drone hovering over a runway could still potentially shut down a major airport for hours.
I guess maybe we could deploy a hunter-seeker drone to capture the invader drone in a net and carry it to a safe place? 🤔