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Coupling Matrix Synthesis Methods for RF/Microwave Filter Design  

Choi, Dong-Muk (경북대학교 전자전기컴퓨터학부)
Kim, Che-Young (경북대학교 전자전기컴퓨터학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.12A, 2007 , pp. 1346-1353 More about this Journal
Abstract
In this paper, the methods are presented for the calculation of general coupling coefficient matrixes used in the band pass filter design. They are calculated from transmission coefficient($S_{21}$) and reflection coefficient($S_{11}$) with desired characteristics derived from the poles of filter function and return loss(RL). The calculated matrixes from this method are transformed to the folded canonical filter structure using similarity transformation which lends us the practical filter design. Based on the resulting matrix, the folded canonical filter has been designed.
Keywords
Filter Function; Coupling Matrix; Resonator; Microwave Filter; Similarity Transform;
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