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Active and Passive Electronic Components
Volume 27 (2004), Issue 3, Pages 161-167

Novel Two-Dimensional (2-D) Defected Ground Array for Planar Circuits

1Department of Electronic Engineering, Shanghai Jiaotong University, P.O. Box 006, No. 1954, Huashan Rd., Shanghai 200030, China
2Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China

Received 3 July 2003; Revised 28 July 2003

Copyright © 2004 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents a novel two-dimensional (2-D) defected ground array (DGA) for planar circuits, which has horizontal and vertical periodicities of defect structure. The defected unit cell of DGA is composed of a Sierpinski carpet structure to improve the effective inductance. Measurements show that the proposed DGA provides steeper cutoff characteristics, lower cutoff frequency, and higher slow-wave factors than the conventional periodic defected ground structure in the same occupied surface.