The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Design of Size-reduced Ring Hybrid Couplers Using a Common Defected Ground Structure

공통 결함접지구조를 이용한 링 하이브리드 커플러의 소형화 설계

  • 임종식 (순천향대 전기공학과) ;
  • 이준 ((주)유텔) ;
  • 권경훈 (순천향대 전기통신시스템공학과) ;
  • 정용채 (전북대 전자정보공학부) ;
  • 한상민 (순천향대 정보통신공학과) ;
  • 안달 (순천향대 전기공학과)
  • Received : 2012.07.05
  • Accepted : 2012.10.11
  • Published : 2012.11.01
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Abstract

This paper describes the design of size-reduced ring hybrid couplers (RHC) using a common defected ground structure (CDGS). The proposed RHC consists of double-sided microstrip line and the CDGS patterns which are placed in the common ground plane of the double-sided microstrip line. The effects of DGS as a periodic structure are imposed on both microstrip lines, so the advantages of the existing DGS are doubled. The normal RHC is designed first and folded by the half reference plane with the CDGS realized on the common ground plane. So another trial for size-reduction is performed by folding the RHC and inserting CDGS besides to the conventional DGS. In order to show a design example, a 2GHz RHC is designed and miniaturized using CDGS. The size of the miniaturized RHS is around 50% of the normal one, while the performances are well preserved even after the size-reduction.

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References

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