system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do radar and communications jammers work?

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.
gpt
Radar signal is a radio wave, which acts very much like waves on water. 

Imagine a perfectly still pool (e.g. indoor one, and you are the first person there). If you drop a ball on one side, you will see waves spread out in pretty circles, and then you will see them bounce off the sides, and some of them will return to the point where you dropped the ball. 

Radar picks up those returns and uses them to figure out what's out there. Unlike the pool, radar can only "see" waves it its actual spot. Think of it as looking at a rubber ducky bobbing up and down in the waves. 

Now imagine that your pool had a bunch of kids jump in and start splashing around. Even if they are on the opposite side of the pool, they will make a lot of waves in entire pool, and small waves from your dropped ball will be impossible to see. This is how "signal overloading" works. 

"interference" means dropping a second ball into a different part of the pool, to create more waves that aim to confuse whoever is trying to observe the waves from the first ball.