Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

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A Design of Tunable Band Pass Filter using Varactor Diode

버렉터 다이오드를 이용한 가변 대역통과여파기 설계

  • Ha, Jung-Hyen (Department of Electric Communication Engineering, Soonchunhyang University) ;
  • Shin, Eun-Young (Department of Electric Communication Engineering, Soonchunhyang University) ;
  • Kang, Min-Woo (Department of Electric Communication Engineering, Soonchunhyang University) ;
  • Gwon, Chil-Hyeun (Department of Electric Communication Engineering, Soonchunhyang University) ;
  • Park, Byung-Hoon (SAWNICS co.) ;
  • Lim, Jong-Sik (Department of Electric Communication Engineering, Soonchunhyang University) ;
  • Choi, Heung-Taek (BcNE Global co.) ;
  • Ahn, Dal (Department of Electric Communication Engineering, Soonchunhyang University)
  • 하정현 (순천향대학교 전기통신공학과) ;
  • 신은영 (순천향대학교 전기통신공학과) ;
  • 강민우 (순천향대학교 전기통신공학과) ;
  • 권칠현 (순천향대학교 전기통신공학과) ;
  • 박병훈 ((주)쏘닉스) ;
  • 임종식 (순천향대학교 전기통신공학과) ;
  • 최흥택 ;
  • 안달 (순천향대학교 전기통신공학과)
  • Published : 2009.06.30
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Abstract

This paper proposed a tunable band pass filter. It is two-poles direct capacitive coupled resonator band pass filter which the capacitors of parallel resonators are changed by varactor diodes. The DC bias controls to change the value of capacitance in the parallel resonator for tunning the pass band. To validate the proposed design method, we fabricated the band pass filter which has tunable center frequency from 200MHz to 245MHz.

본 논문에서는 통과대역을 가변하는 대역통과여파기를 제안하였다. 이 여파기의 구조는 2단 Direct Capacitive Coupled 공진기 대역통과여파기이며, 중심주파수의 가변을 위하여 여파기에 사용된 병렬 공진기의 캐패시터를 버렉터 다이오드로 대체하였다. 본 논문에서는 중심주파수 200MHz에서 최대 245MHz까지 가변되는 대역통과여파기를 제작하여 설계 이론의 타당성을 검증하였다.

Keywords

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