The Miniature Air Launched Decoy (MALD)

[dexter]

The Miniature Air Launched Decoy (MALD) is a nine-foot, 300 pound drone designated for electronic warfare and designed to copy the flight profiles of US aircraft, which confuses the enemy's integrated air defense systems.

The MALD is launched from an aircraft in-flight and travels a pre-programmed course of up to 100 checkpoints over a 500 nm range. As it's flying around, its state-of-the-art Signature Augmentation Subsystem (SAS), comprised of various active radar enhancers covering a range of frequencies, is pumping out signals that mimic the radar signature and flight profiles of a larger, more dangerous, allied aircraft—anything from the B-52 Stratofortress to the F-117 Nighthawk. By launching a small armada of these drones into enemy airspace, they force anti-aircraft batteries to either remain inactive potentially letting what looks like a fleet of bombers pass overhead or open fire and reveal their positions, thus allowing the real bombers to strike.

 

[The SC]

It is a good Idea, used by UAV's already, but new Radar systems might be able to discern between real and fake or mimicking signals.
The best Idea (In my opinion) to counter them is a passive radar with discriminating software.

 

[Oldman1]

Thats pretty clever, and mix it with stealth cruise missiles with the decoys, it forces the enemy to activate their radars or if they don't then its allowing cruise missiles to strike their targets unhindered.

 

[Penguin]

MALD-J is the jammer variant of the basic decoy, and the first ever stand-in jammer to enter production. The unmanned MALD-J navigates and operates much closer than conventional EW to the victim radar when jamming the electronics, allowing aviators and aircraft to stay out of harm’s way. And, it is able to loiter in the target area for an extended time period – plenty of time to complete the mission.