Whoa, blast from the past. I think I used to have some directional couplers they made. Or were they 4-port hybrids... ?
I don’t know about that ,, they were (and are) famous for the ESCORT brand radar detectors ... their logo is a highway disappearing into a sunset... A USAF colonel was known to have used the original ESCORT detector for a while to find unfriendly SAM launchers...