Proceedings of the Korea Electromagnetic Engineering Society Conference (한국전자파학회:학술대회논문집)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design of a new compact microstrip line duplexer using stepped impedance resonator

계단형 임피던스 공진기를 이용한 새로운 구조의 소형화된 마이크로스트립 듀플렉서 설계

  • Kim, Sang-Bong (Dept. of Electronic Engineering, Dongguk University) ;
  • Lee, Yun-Gyeong (Dept. of Electronic Engineering, Dongguk University) ;
  • Im, Hyeon-Jun (Dept. of Electronic Engineering, Dongguk University) ;
  • Yun, Hyeon-Bo (Dept. of Electronic Engineering, Dongguk University)
  • 김상봉 (동국대학교 전자공학과) ;
  • 이윤경 (동국대학교 전자공학과) ;
  • 임현준 (동국대학교 전자공학과) ;
  • 윤현보 (동국대학교 전자공학과)
  • Published : 2003.11.15
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Abstract

In this letter, a novel compact duplexer which consists of Tx and Rx Filter using microstrip line ${\lambda}/4$ resonators with a pair of tap-connected open-ended stepped impedance stubs is designed. The tapped open stubs not only work as K-inverters but also introduce attenuation poles, attenuation poles are located at upper and lower side of the passband by adjusting the open stub length and width. The result of measurement duplexer has been yielded better isolation and sharper skirt behavior than that with a conventional bandpass filter and similar to those of simulation results.

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