I spam this everytime WW2 engineering is mentioned and I'll do it again:
The secret war is a documentary about exactly that (amongst other things e.g. the magnetic mine): WW2 RADAR and radio navigation, and the intellectual battle between the Brits and Germans as they tried to locate beams and steal (genuinely!) entire German ground radar stations
It's very long, very detailed but well presented - in a style that assumes you aren't stupid.