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

한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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진행모드 해석을 이용한 유전체 공진기 대역통과 필터의 결합 특성 개선에 관한 연구

A Study on the Coupling Performance Improvement of Cylindrical DR Bandpass Filter using Travelling Wave Mode Analysis

  • 이원희 (건국대학교 전자.정보통신공학과) ;
  • 박장원 (건국대학교 전자.정보통신공학과) ;
  • 양재혁 (건국대학교 전자.정보통신공학과) ;
  • 허정 (건국대학교 전자.정보통신공학과) ;
  • 이재훈 (건국대학교 물리학과) ;
  • 이상영 (건국대학교 물리학과)
  • Lee, Won-Hui (Dept.of Electronics, Information & Communication Eng., Konkuk University) ;
  • Park, Chang-Won (Dept.of Electronics, Information & Communication Eng., Konkuk University) ;
  • Yang, Jae-Hyuck (Dept.of Electronics, Information & Communication Eng., Konkuk University) ;
  • Hur, Jung (Dept.of Electronics, Information & Communication Eng., Konkuk University) ;
  • Lee, J. H. (Dept.of Physics, Konkuk University) ;
  • Lee, Sang-Young (Dept.of Physics, Konkuk University)
  • 발행 : 2000.11.01
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초록

In this paper, We designed and fabricated C-band bandpass filter using dielectric resonators. From waveguide cutoff frequency which applied the region between adjacent dielectric resonators, the height of cavity is determined. The cavity's diameter is determined to the twice of dielectric resonator's diameter considering the conductor loss. The resonant frequency of the DR-cavity is calculated with travelling wave mode analysis. Conventionally, circular cylindrical dielectric resonator is analysed by Cohn's model which use the evanescent mode in the region between dielectric resonator wall and circular cavity wall, which is an approximated method. The external quality factor, Q$_{ex}$ has found with simulation result using Ansoft's Maxwell simulation tool. The designed filter using dielectric resonators with dielectric constant of 45 has the passband center at 5.065GHz. The bandpass filter using dielectric resonators have about 1dB insertion loss. 20MHz bandwidth and more than 30dB attenuation at f$_{0}$$\pm$15MHz.z.z.

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