Waveguide feed for dish


Recently I tested the feed for VSWR as the initial results using the dish for 3cm were poor.

At the shack of Hans, PA0EHG we could not find any good return-loss for this feed and started to analyse why.

Well see for you self!

Due to the corrosion effect, the waveguide was almost short-circuited, not permitting any good return-loss. This is really Waveguide CutoFF!!


Click on the picture to enlarge