| Title |
A Study for the Equivalent Circuit and Slow-Wave Factor of Defected Ground Structure Transmission Line |
| Authors |
임종식(Lim, Jong-Sik) ; 구자경(Koo, Ja-Kyung) ; 한상민(Han, Sang-Min) ; 정용채(Jeong, Yong-Chae) ; 안달(Ahn, Dal) |
| Keywords |
DGS ; Defected ground structure ; Slow-wave factor |
| 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. |