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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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The Dual-Mode Ring-Resonator Bandpass Filter Using Artificial-Transmission-Lines

인공전송선로를 이용한 이중모드 링-공진기 대역통과 여파기

  • Sim, Kyung-sub (Department of BIT Medical & Electrical and Electronics Engineering, Kangwon National University) ;
  • Hwang, Hee-yong (Department of BIT Medical & Electrical and Electronics Engineering, Kangwon National University)
  • 심경섭 (강원대학교 BIT의료융합학과) ;
  • 황희용 (강원대학교 BIT의료융합학과)
  • Received : 2016.02.12
  • Accepted : 2016.05.16
  • Published : 2016.06.07
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Abstract

This paper presents dual-mode ring-resonator bandpass filter using LUC of artificial-transmission-lines. The conventional ring-resonator bandpass filter has limitation in miniaturization because the conventional ring-resonator is based on a one wavelength operation, and problem due to undesire harmonics. The ring-resonator bandpass filter is miniaturized and show higher order mode rejection by configuring a ring-resonator with LUC of artificial-transmission-lines. The two-stage bandpass filter is designed and fabricated with a ring-resonator and input/output interdigital coupled line. A fabricated filter shows dual-mode, rejection of whole ultra wide band, sharp skirt characteristics and has ring area reduced by 60 % compared to the conventional ring-resonator bandpass filter.

본 논문은 인공전송선로 중 하나인 LUC(Low-pass filter Unit Cell)을 이용한 이중모드 링-공진기 대역통과 여파기를 제안한다. 기존의 링 공진기 대역통과 여파기는 한 파장 링 공진기를 기반으로 설계하므로 소형화에 어려움이 있고, 정수배 파장의 고조파로 인한 원치 않는 동작의 문제점이 있다. 저역통과 특성을 지닌 인공전송선로 중 하나인 LUC를 이용하여 링-공진기를 구성함으로써 소형화와 고조파 저지 특성을 구현하였다. 링-공진기와 입력 및 출력 단의 인터디지탈 결합선로 인버터를 이용하여 2단 대역통과 여파기를 설계 및 제작하였다. 제작된 여파기는 이중모드, UWB 전 대역저지, 날카로운 스커트 특성을 나타냈으며, 기존의 링-공진기 대역통과 여파기의 링 면적을 약 60 % 감소시켰다.

Keywords

References

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