A modeling method for dumbbell‐shaped DGS and its parameter extraction

Abstract

This article presents an equivalent circuit model for a dumbbell‐shaped defected ground structure (DGS) in a microstrip line. The effects of equivalent circuit elements of a dumbbell‐shaped DGS and their magnetic coupling to the host transmission line are modeled as a simple lumped‐element circuit. By adding a virtual capacitor on the narrow etched gap, the values of inductance and capacitance of the dumbbell‐shaped DGS in the ground plane were extracted. Also, other main circuit parameters of the proposed circuit model were extracted using EM simulation result. This article provides one approach for understanding the operating principle of the DGS structures. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2910–2913, 2014

A Compact Absorbing FSS Structure for Antenna Decoupling in the 5G 3.5GHz Band

“…First, the electromagnetic band gap (EBG) technique is used to prevent the surface wave propagation from one antenna to another through the dielectric substrate [1]. Another decoupling approach presented in [2][3] consists in etching the common ground structure shared by several antennas. This so-called defected ground structure (DGS) technique consists in patterning resonating slots within the ground plane in order to prevent galvanic couplings.…”