47 GHz feed for my EME system
Designed for a F/D = 0.4
Main principle: a transition from recktangular to round waveguide and a choke to equalize the E and H pattern.
The choke is made of a small part which is soldered to the main part.
On 2-11-2020 I measured return loss of my feed, I needed to know if it was
good enough to understand measured results from on air testing a few days
before. The result was much better than I ever dared to hope for.
The result of the feed is a Return Loss of a bit better than -30 dB.