The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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An Efficient Design for an Ultra-Wideband Microstrip-to-CPS Transition Applicable to Millimeter-Wave Systems

밀리미터파 시스템에 적용 가능한 초광대역 마이크로스트립-CPS 전이구조 설계

  • 김영곤 (LIG넥스원 탐색기/광학연구센터) ;
  • 김윤진 (LIG넥스원 탐색기/광학연구센터) ;
  • 김강욱 (경북대학교 전자공학과)
  • Received : 2015.01.09
  • Accepted : 2015.02.25
  • Published : 2015.03.31
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Abstract

A clear and efficient design method for ultra-wideband microstrip-to-coplanar stripline(CPS) transition, which is based on the analytical expressions of the whole transitional structure, is presented. The conformal mapping is applied to obtain the characteristic impedance of the transitional structure within 3.2 % accuracy as compared with the EM-simulation results. The transition is designed to provide broadband impedance matching using Klopfenstein taper. The implemented transition performs less than 1 dB insertion loss per transition for frequencies from 5.39~40 GHz.

본 논문에서는 명료하고 간단한 초광대역 마이크로스트립-CPS(coplanar stripline) 전이구조 설계를 제안하였다. 등각사상을 이용하여 전이구조의 특성 임피던스를 해석을 하였으며, 닫힌 형태의 전이구조 공식을 제시하였다. 제안한 전이구조 공식의 계산 결과를 EM 상용 시뮬레이터와 비교하여 3.2 % 오차 이내임을 알 수 있었다. 초광대역 전이구조는 Klopfenstein 테이퍼를 이용하여, 광대역 임피던스 정합하였다. 제작된 전이구조는 5.39~40 GHz 이상의 대역에서 삽입손실 1 dB 이하 및 반사손실 10 dB 이상을 만족하였다.

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References

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