a1 Millimetre Wave Laboratory, Department of Electronics and Computer Engineering, Indian Institute of Technology, Roorkee-247667, India
This paper presents a close but a beginner's perspective and a comprehensive review of microstrip filters with defected ground structure (DGS). The concept of DGS is inspired by photonic/electromagnetic bandgap structures (EBG/PBG) and metamaterials that are employed in microwave components to achieve a variety of performance enhancement features. Modeling of DGS and metamaterials as an L-C equivalent lumped circuit is much simpler in comparison with complex EBGs/PBGs. In this review, we have given a detailed account of the microstrip filters using DGS.
(Received November 21 2012)
(Revised June 01 2013)
(Online publication August 02 2013)