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Hello, i would like to create an 11 section coupler with 0.1 ripple,
i cant find an example of how exactly they got these numbers in the attached photo.
I guess the answer is in the text book chapter before the table...
I don't know if the coupler has been designed applying a theoretically derived systematic approach or by empirically fitting the section length and impedance using an equiripple (chebyshev) error optimum.
i have read lots of articles and they dont go into specifics regarding how mathematckly they derived these numbers.
i know that its odd mode chebyshev polinomials.
but how exactly it could be done mathemticky its hard to say.
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