The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Coupling Matrix Synthesis Methods for RF/Microwave Filter Design

초고주파용 필터설계를 위한 결합행렬 합성법

  • 최동묵 (경북대학교 전자전기컴퓨터학부) ;
  • 김채영 (경북대학교 전자전기컴퓨터학부)
  • Published : 2007.12.31
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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.

본 논문에서는 필터함수의 감쇄극점(poles)과 반사손실(Return Loss)로부터 전송계수($S_{21}$)와 반사계수($S_{11}$)를 도출하고, 이 값들로부터 대역통과필터 설계를 위한 결합계수행렬 계산법을 제시하였다. 계산된 결합계수행렬에 유사변환을 적용하여서 결합계수행렬을 접힌 표준형 필터 구조의 커플링계수 행렬로 변환하였다. 그 결과를 이용하여 접힌 표준형 필터를 설계하였다.

Keywords

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