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Last year, Chris Smith NX0E shared his hybrid coupler design with me. He based his design on Bedrosian's article "Normalized Design of 90¡ã Phase-Difference Networks" .
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I have included two of Chris's articles from 1988 in the NX0E_hybrid coupler folder
/g/loopantennas/files/NX0E_hybrid_coupler .
I have transferred Chris' idea to LTspice. You can find the LTspice file and the phase difference plot in that folder.
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Kind regards
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Piotr, SP2BPD
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