"A radar that can't handle noise is poorly designed..." I agree with the general tenet of your post but do we know what the status of the radar's RX's front en

"A radar that can't handle noise is poorly designed..." I agree with the general tenet of your post but do we know what the status of the radar's RX's front end is like in practice? From my experience, many of the front ends of older radar receivers are primitive by comparison with today's state of the art in that they have very bad crossmoduation figures (basic diode mixers etc.).