1 ~12GHz 180 degree hybird coupler design

hi

now i need to do a hybird coupler , i was designed 1-2 2-4 4-8GHz hybird coupler only. I don't kown how to work it out .who can give me suggestion about it?

email : pangtaishi@126.com

also, i hope to make friends with you.

thank you for your suggestion !

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