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

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Broad Band Stop Filter Using Frequency Selective Surface Embeded in Microwave Transmission Line

마이크로파 전송선로에 삽입된 주파수 선택 표면을 이용한 광대역 대역저지필터

  • Kim, Jinyoung (Graduate School of NID Fusion Technology, Seoul National University of Science and Technology) ;
  • Jung, Changwon (Graduate School of NID Fusion Technology, Seoul National University of Science and Technology)
  • 김진영 (서울과학기술대학교, NID융합기술대학원) ;
  • 정창원 (서울과학기술대학교, NID융합기술대학원)
  • Received : 2012.07.17
  • Accepted : 2012.12.06
  • Published : 2012.12.31
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Abstract

This article presents a band-stop filter (BSF) by using a periodic structure property of frequency selective surfaces (FSSs) embedded in a microstrip transmission line. The proposed BSF is designed with FSS unit cells modifying the cross-loop slots. The BSF is interpreted with an equivalent circuit model and a dispersion diagram. The center frequency (fo) of the BSF is 6.6GHz. Proposed filter increases the number of unit cell. As a result, 3dB bandwidth is wider and insertion loss is reduced. Also, Facbricated BSF exhibits uniplanar geometry, simple fabrication.

본 논문은 마이크로스트립 전송선로에 삽입된 주파수 선택 표면(FSSs)을 사용하여 주기적인 구조를 갖는 대역저지필터(BSF)에 관한 것이다. 제안된 대역저지필터는 변형된 크로스 루프 슬롯 (Cross-loop slot)을 단위 셀로 하여 주기적인 구조로 설계하였으며, 설계된 대역 저지 필터는 등가회로 모델과 분산 도표(dispersion diagram)로 해석하였다. 대역 저지 필터의 중심주파수(fo)는 6.6 GHz이다. 제안된 필터는 단위 셀의 개수가 증가하면 3dB 대역폭은 넓어지고 삽입손실은 줄어드는 특성이 있다. 또한 제안한 대역저지필터는 소형의 평면구조를 가지며, 한 번의 에칭으로 제작이 가능 하여 다양한 분야의 RF 필터로서 사용 가능성이 높다.

Keywords

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