Optimization of a Defected Ground Structure to Improve Electromagnetic Bandgap Performance

Abstract

Abstract A dispersion analysis is performed to estimate the stopband characteristics of electromagnetic bandgap (EBG) structures with defected ground structures (DGS) of various shapes. Design guidelines are suggested for both elliptical and rectangular DGS patterns that result in a maximum stopband bandwidth for a given perforation area. This method provides a basis for numerical optimization techniques that can be used in synthesizing DGS shapes to meet bandgap requirements and layout constraints. Key Words : Defected Ground Structure (DGS), Dispersion Analysis, Electromagnetic Bandgap (EBG), Power/Ground Noise. Manuscript received November 3, 2014 ; Revised December 2, 2014 ; Accepted December 12, 2014. (ID No. 20141103-054J) 1 Department of Electronics Engineering, Ajou University, Suwon, Korea. 2 Electronics and Telecommunications Research Institute (ETRI), Daejeon, Korea. *Corresponding Author: Dong Gun Kam (e-mail: kam@ajou.ac.kr) This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved.