{"id":1697,"date":"2021-12-28T14:38:06","date_gmt":"2021-12-28T13:38:06","guid":{"rendered":"https:\/\/pa3csg.nl\/?p=1697"},"modified":"2024-03-02T08:16:45","modified_gmt":"2024-03-02T07:16:45","slug":"10-ghz-feedhorn-with-scalar-ring-chaparall-feed","status":"publish","type":"page","link":"https:\/\/pa3csg.nl\/?page_id=1697","title":{"rendered":"10 GHz feedhorn with scalar ring, Chapparall Feed."},"content":{"rendered":"\n

In order to get back on 10 GHz EME I needed a feedhorn for my 0.25 F\/D dish. Not easy to find! Paul W1GHZ paper came to help. The simulations showed there were a number to choose from. Many of the simulations didn’t provide information about the 0.25 F\/D. I estimated that the version with a ring width and depth of 0.2 lambda would be the best.<\/p>\n\n\n\n

As I have limited access to milling machines the help was called in from the Fablab Midden Limburg<\/a> they machined it for me after I made the drawing.<\/p>\n\n\n\n

https:\/\/youtu.be\/G_8fIuUkKk4 <\/a><\/p>\n\n\n\n

As you can see on the video it went very smoothly.<\/p>\n\n\n\n

The copper pipe was hammered and squeezed to fit in the WG16 flange. The was rather a simple action and easy to do. For first tests this should do.<\/p>\n\n\n\n