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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Dual-Band Filter Using Heterogeneous Resonators

이종 공진기를 이용한 이중 대역 통과 필터

  • Kim, Kyoung-Keun (Department of Electronics and Computer Engineering, Chonnam National University) ;
  • Lim, Yeong-Seog (Department of Electronics and Computer Engineering, Chonnam National University)
  • 김경근 (전남대학교 전자컴퓨터공학과) ;
  • 임영석 (전남대학교 전자컴퓨터공학과)
  • Accepted : 2010.01.20
  • Published : 2010.03.31
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Abstract

In this paper, the design and the fabrication of dual bandpass filter using heterogeneous resonators is presented. Each resonator would not have an effect on each resonant frequency. Two types of resonators are designed to have different fundamental resonant frequencies, one for the lower passband and the other for the upper passband. In the lower band, half and quarter wavelength resonators were used. In the upper band, a dual-mode resonator was used for adjusting bandwidth. In the upper pass band frequency, resonators of lower passband acts as the input and output. For WLAN, Proposed filters with different second passband frequencies at 2.45/5.2 GHz and 2.45/5.8 GHz are designed and fabricated.

본 논문에서는 서로 다른 공진점을 갖는 공진기들을 이용하여 이중 대역 통과 필터를 구현하였다. 서로 다른 공진점을 갖는 $\lambda_g$/2 공진기들을 이용하여 각 공진기들의 동작 주파수가 서로의 동작 주파수에 영향을 미치지 않는 것을 이용하여 이중 대역 통과 필터를 설계하였다. 하측 통과 대역은 $\lambda_g$/2 공진기와 $\lambda_g$/4 공진기를 이용하였고, 상측 통과 대역은 이중 모드 공진기를 이용하여 설계하였으며, 하측 통과 대역의 공진기는 상측 통과 대역의 급전부로 동작한다. 제안된 구조는 WLAN 대역인 2.45/5.2 GHz와 2.45/5.8 GHz에서 동작하도록 설계 제작되었다.

Keywords

References

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