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Equivalent circuit modelling of spiral defected ground structure for microstrip line

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5 Author(s)
Chul-Soo Kim ; Telecommun. Basic Res. Lab., ETRI, Taejon, South Korea ; Jong-Sik Lim ; Sangwook Nam ; Kwang-Yong Kang
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An equivalent circuit for the microstrip line with a spiral defected ground structure (DGS), which is etched on the metallic ground plane, and a parameter extraction method, are presented. The proposed spiral DGS provides steep rejection characteristics with only one spiral-shaped defect. Experimental results show excellent agreement with simulated results of the equivalent circuit and the validity of equivalent circuit modelling for the spiral DGS

Published in:

Electronics Letters  (Volume:38 ,  Issue: 19 )