Title :
A spiral-shaped defected ground structure for coplanar waveguide
Author :
Lim, Jong-Sik ; Kim, Chul-Soo ; Lee, Young-Taek ; Ahn, Dal ; Nam, Sangwook
Author_Institution :
Inst. of New Media & Commun., Seoul Nat. Univ., South Korea
Abstract :
The authors present a spiral-shaped defected ground structure for coplanar waveguides (DGSCPW), which can be used as a kind of periodic structure for a planar transmission line. The proposed spiral-DGSCPW adopts spiral-shaped defects on both ground planes of CPW. Due to the spiral-shaped defects, the equivalent shunt inductance and slow-wave effects increase more rapidly than the standard CPW or CPW lines combined with the conventional PBG. The modeling and analysis to extract the equivalent circuit, increased slow-wave factor, and simulated and measured performances are presented.
Keywords :
Butterworth filters; band-stop filters; coplanar waveguide components; coplanar waveguides; equivalent circuits; microwave filters; passive filters; periodic structures; waveguide filters; Butterworth band rejection filter; CPW; coplanar waveguides; equivalent circuit; equivalent shunt inductance; ground planes; modeling technique; periodic structure; planar transmission line; slow-wave effects; spiral-shaped defected ground structure; Analytical models; Circuit simulation; Coplanar waveguides; Equivalent circuits; Inductance; Performance analysis; Performance evaluation; Periodic structures; Planar transmission lines; Planar waveguides;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2002.803208
