Pretty much, although you're on the nail with your second statement.Originally Posted by FlyingDutchMan
Going back to what I referred to in my earlier posting, a dopplar shift is where the frequency is changed over a given distance & speed (amongst other things). With this in mind, the reason early stealth planes worked so well was because their structures consisted of a highly complex arrangement of angled body panels. When these various angles were hit by an RF (radio frequency) signal, be they microwave (including radar) or otherwise, each of these panels would reflect the RF signal back in various directions, some even towards the transmitting source at fractionally different times. Therefore the dopplar effect would be different for each of the signals received by the radar, therefore making the plane appear very small (like a bird or a flock of small birds) or not appear at all.
More modern radars overcame this by introducing a very careful set of algorithms into the radars software capable of "rebuilding" these different reflections in order to reconstitute the target. Then came RF absorption material.............
How to jam - three guys in a room, one is shouting (the radar transmitter, Tx) at the other, one is shouting back at him at least as loud if not louder (the target jammer transmitting, Tx), the third (the radar receiver, Rx) is trying to work out what the hell is being said.
Bookmarks