I`ve uncovered this image from a 1946 soviet report on german radar. It relates to the "Rettin-M" AA radar, installed in a Flakvierling. It was one of the few ( the only? ) on-carriage AA radar tried by Germany in WW2. There are evidence of a "Rettin-L", which I assume to mean "Land". Therefore, this radar was to be used in ground stations.