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A spiral-shaped defected ground structure for coplanar waveguide
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- Authors
- Jong-Sik Lim, Chul-Soo Kim, Young-Taek Lee, Dal Ahn, Sangwook Nam
- Issue Date
- 2002-09
- Citation
- IEEE Microwave and Wireless Components Letters, v.12, no.9, pp.330-332
- ISSN
- 1531-1309
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- This letter presents a spiral-shaped defected ground structure for coplanar waveguides (DGSCPW), which can be used as a kind of periodic structure for 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.
- KSP Keywords
- CPW line, Coplanar Waveguide Feeding(CPW), Equivalent Circuit, Slow-wave, defected ground structure(DGS), ground planes(GP), modeling and analysis, periodic structure, planar transmission line