A Novel Resonant Ground Structure Based on a Cavity-Backed DGS

Author

Imseob Shin ; Tae-Hak Lee ; Juseop Lee ; Young-Sik Kim

Author_Institution

Dept. of Comput. & Radio Commun. Eng., Korea Univ., Seoul, South Korea

Volume

24

Issue

5

fYear

2014

fDate

May-14

Firstpage

321

Lastpage

323

Abstract

In this letter, a new resonant ground structure (RGS) based on a cavity-backed DGS is proposed. The proposed RGS is similar to a DGS and is modeled by a parallel RLC resonance circuit. Since the proposed RGS utilizes a substrate-filled metallic cavity (SFMC) underneath the DGS, it leads to no back-radiation and high quality factor. The frequency responses and structural parameters are analyzed and verified via simulation and measurement. The quality factor of the proposed RGS with a spiral-shaped defect is larger than that of the DGS with the same defect by a factor of 7.4.

Keywords

Q-factor; RLC circuits; microwave metamaterials; photonic band gap; cavity-backed DGS; parallel RLC resonance circuit; quality factor; resonant ground structure; spiral-shaped defect; substrate-filled metallic cavity; Capacitance; Dielectric constant; Integrated circuit modeling; Photonic band gap; Q-factor; RLC circuits; Resonant frequency; Defected ground structure (DGS); electromagnetic bandgap (EBG); photonic bandgap (PBG); resonant ground structure (RGS);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2014.2309079

Filename

6777365