It's a bigger drone, probably fixed-wing, that catches drones that fly where they shouldn't. First, it carries a passive radar receiver, to receive the reflections of a ground-based radar's beam from the offending drone (which should be easier the closer the receiver is to the target). It has a grabber to grab onto it, and motorized spinny notched things that sync up with its rotors/propellers (by stroboscopy), grab them in their notches, and bring them to a stop. Then the drone-grabbing drone can bring the rogue drone down for a safe landing. If designed with sufficient adaptability, it should be effective against fixed-wing and rotary-wing drones of all kinds, up to a certain size.

N/A [2018-12-30]
-- notexactly, Dec 30 2018

Sighs...
-- not_morrison_rm, Dec 30 2018


But what if the drone has a drone catching drone catcher?
-- sninctown, Dec 31 2018


Obviously, you then deploy the drone catching drone catching drone catching drone.
-- MaxwellBuchanan, Dec 31 2018



random, halfbakery