Split Ring Resonators With Tapered Strip Width for Wider Bandwidth and Enhanced Resonance

Author

Horestani, Ali K. ; Fumeaux, Christophe ; Al-Sarawi, Said F. ; Abbott, Derek

Author_Institution

Sch. of Electr. & Electron. Eng., Univ. of Adelaide, Adelaide, SA, Australia

Volume

22

Issue

9

fYear

2012

Firstpage

450

Lastpage

452

Abstract

This article presents a modified edge-coupled split ring resonator (SRR). The proposed SRR is composed of two concentric metallic rings with a nonuniform strip width, which is tapered based on the current and voltage profile in the SRR structure. In contrast to other SRR miniaturization methods, which are based on increasing the equivalent capacitance of the SRR, the proposed SRR benefits from both increased capacitance and inductance to preserve the strength and bandwidth of the resonance. It is also shown that compared to a uniform SRR, a tapered SRR with the same electrical size provides a stronger resonance with 84% wider bandwidth, as desired in wideband filter design. The theory and simulation results are validated through measurement.

Keywords

capacitance; resonators; SRR equivalent capacitance; SRR miniaturization method; concentric metallic ring; current profile; electrical size; enhanced resonance; modified edge-coupled split ring resonator; nonuniform strip width; tapered strip width; voltage profile; wideband filter design; wider bandwidth; Bandwidth; Capacitance; Inductance; Integrated circuit modeling; Load modeling; Optical ring resonators; Resonant frequency; Metamaterials; split ring resonator (SRR);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2012.2211341

Filename

6268296