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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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HMSIW Balanced Filter for Improved Isolation between Output Ports

출력 단자 간의 격리 특성이 향상된 HMSIW 평형 여파기

  • Hwang, Seok-Min (Department of Electronic Engineering, Ajou University) ;
  • Byun, Jin-Do (Department of Electronic Engineering, Ajou University) ;
  • Lee, Hai-Young (Department of Electronic Engineering, Ajou University)
  • Published : 2011.02.28
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Abstract

In this paper, we propose a half mode substrate integrated waveguide(HMSIW) balanced bandpass filter to yield improved isolation between output ports. In order to achieve good isolation, resistive coupling slot is employed in HMSIW filter. The measurement results show that the insertion losses($S_{21}$, $S_{31}$) are $5.4{\pm}0.2$ dB and input return loss($S_{11}$) is more than 10 dB from 5.8 GHz to 6.4 GHz. Moreover isolation between output ports is larger than 18 dB and phase difference of output ports is $180{\pm}10^{\circ}$.

본 논문에서는 출력 단자 간의 격리 특성이 향상된 half mode 기판 집적 도파관(half mode substrate integrated waveguide) 평형 여파기를 제안한다. 제안된 평형 여파기는 중앙 금속 층에 저항성 커플링 슬롯을 삽입하여 출력 단자 간의 격리 특성을 향상시켰으며, 우수한 삽입 손실을 가지며 평형 신호를 다룰 수 있다. 측정 결과, 5.8~6.4 GHz의 주파수 대역에서 삽입 손실 $5.4{\pm}0.2$ dB, 입력 반사 손실은 10 dB 이상으로 나타났다. 또한, 통과 대역내에서 출력 단자 간의 격리 특성이 18 dB 이상으로 나타났으며, 출력 단자 사이의 위상차도 $177{\pm}8^{\circ}$가 나타났다.

Keywords

References

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