Welcome Mark,
All the rubber 'Blowup Tanks and Aircraft were setup along the British coast to make the 'Jerry' believe we had more weapons than we did.
Make them think twice about invasion plans.
They were there so that the German pilots could visually see them and report back that info.
I dont think any aircraft had onboard Radar during the 2nd W War? I could be wrong.
Britih ground RADAR was big heavy and trucklike
The 3Mark 6 had a rotating scrubbing board antennae, and the 4Mk 7 was a 10 cm radar with a dish antennae, a longer range, more modern.
Had 'Jerry' had aircraft Radar, it would not have reflected off the rubber tanks, and our clever 'game' would have been sussed.
In modern warfare today complete metallized rubber aerodromes with planes have been deployed to fool the enemy.
Interestingly that would not be used in Israel today.?
It is known that they only have one civil airport and one military airport...they keep their military planes on the edges of fields, and use the highways for takeoff and landings in a national emergency.
