대한전자공학회논문지SD (Journal of the Institute of Electronics Engineers of Korea SD)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

CPW 구조를 이용한 94 GHz Branch-line 대역통과 여파기의 설계 및 제작

Design and Fabrication of the 94 GHz Branch-line Bandpass Filter using CPW structure

  • 권혁자 (동국대학교 밀리미터파 신기술 연구센터) ;
  • 방석호 (동국대학교 밀리미터파 신기술 연구센터) ;
  • 이상진 (동국대학교 밀리미터파 신기술 연구센터) ;
  • 윤진섭 (동국대학교 밀리미터파 신기술 연구센터) ;
  • 이진구 (동국대학교 밀리미터파 신기술 연구센터)
  • Kwon, Hyuk-Ja (Millimeter-wave INnovation Technology research center, Dongguk univ.) ;
  • Bang, Suk-Ho (Millimeter-wave INnovation Technology research center, Dongguk univ.) ;
  • Lee, Sang-Jin (Millimeter-wave INnovation Technology research center, Dongguk univ.) ;
  • Yoon, Jin Seob (Millimeter-wave INnovation Technology research center, Dongguk univ.) ;
  • Rhee, Jin-Koo (Millimeter-wave INnovation Technology research center, Dongguk univ.)
  • 발행 : 2007.05.25
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초록

본 논문에서는 밀리미터파 대역에서 동작하는 단일 평면 구조의 회로에 쉽게 집적화 할 수 있는 94 GHz CPW branch-line 대역통과 여파기를 설계 및 제작하였다. 본 논문은 커플링 포트들을 open load stub로 연결하고, 격리 포트를 출력노드로 취하여 branch-line 커플러를 transversal filtering section으로 사용하는 것이다. 94 GHz branch-line 대역통과 여파기를 설계하기 위해서 CPW 라이브러리를 구축하고, branch-line 커플러와 open load stub들의 임피던스 및 길이를 최적화하였다. 제작된 대역통과 여파기의 측정결과, 주파수 94 GHz를 중심으로 11.7 %의 3 dB 상대 대역폭과 2.5 dB의 삽입 손실 특성을 나타내었다. 또한, 94 GHz에서 -18.5 dB의 입출력 반사 손실 특성을 얻었다.

We report the 94 GHz CPW branch-line bandpass filter for planar integrated millimeter-wave circuits. The branch-line coupler operates as a transversal filtering section by connecting the coupling ports to the open load stubs and taking the isolation port as the output node. For design of the 94 GHz branch-line bandpass filter, we built the CPW library and optimized the characteristic impedances and the lengths of the branch-line coupler and the open load stubs. The fabricated 94 GHz bandpass filter exhibits an insertion loss of 2.5 dB with an 11.7 % 3 dB relative bandwidth and the return loss is -18.5 dB at a center frequency of 94 GHz.

키워드

참고문헌

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