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

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study for the Equivalent Circuit and Slow-Wave Factor of Defected Ground Structure Transmission Line

DGS 전송선로의 등가회로와 전파지연계수에 대한 재고찰

  • 임종식 (순천향대학교 전기통신공학과) ;
  • 구자경 (순천향대학교 전기통신공학과) ;
  • 한상민 (순천향대학교) ;
  • 정용채 (전북대학교 전자정보공학부) ;
  • 안달 (순천향대학교 전기통신공학과)
  • Published : 2008.11.01
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Abstract

A frequency-dependent slow-wave factor (SWF) and equivalent circuit model of transmission line with defected ground structures (DGS) is described. Once S-parameters of a DGS transmission line are given, the conventional frequency -independent equivalent circuit elements are extracted using 3dB cutoff and resonant frequencies (Fc and Fo) as the first step. Using the initial equivalent elements and simple transmission line theories, a frequency-dependent equivalent transmission line model is established through an analytical method, and finally the frequency dependent SWF is calculated. The proposed equivalent circuit model and SWF are frequency-dependent and more reliable because even small insertion loss within available passband is considered, while they have been independent of frequency.

Keywords

References

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