F22 and F35 themselves have passive radars as well, and can detect stuff without emitting anything. Passive radar is not much more than a phased antenna array w

F22 and F35 themselves have passive radars as well, and can detect stuff without emitting anything. Passive radar is not much more than a phased antenna array without an emitter, you just don't have anything to light up the target with. Once you start emitting you're not stealth anymore, and you can be shot down pretty easily. Same with carrying external ordnance. Same with worn out radar absorbing coating. Same with any physical defects on the plane's surface. That's why these planes are designed to only be stealth in the first few days of a real, actual war, and then once they get scuffed a little by e.g. bullets or debris you're supposed to treat them like regular fighters and not rely on their no longer existent stealth.