double waveguide ridges!

i need help regarding dimensions of double ridged horn i-e
separation between ridges
width of ridges

Hello,

U may need the book 'Modern antenna design' by Thomas A. Milligan
may be you can use books.google.com
there is chapter about horn antennas.

also there is a post which can be usefull
https://www.edaboard.com/ftopic333666.html

WASABI