Gregorian Antenna design

Hi
I want to design a feed for an existing gregorian main and sub reflector dual reflector antenna, but I dont know how ic the procedure to design, help me please

did u mean cassegrain antenna ? u can find the formula in stuzman

You can find the basics of Gregorian antennas in the attached document (Multiple Reflector Antennas).
After you know the basics, you can use ICARA software to analyse the performance of the different feeds.

hi eagle
when i want to install ICARA a problem appear ?

not exactly cassegrain but similar to that differing in real or virtual focus

eagle5,

I really like the info you attached.

BR,
Tsvetelin

Thanks Tsvetelin,
I did some reflectors design some time ago, and this document was very helpful.

I also had problem installing it, may you verify it please?

i attached ICARA software and it work truly i hope it useful