Experimental observation of the electric coupling effect in split ring resonators and the prevention

✍ Scribed by Lam, V. D. ;Kim, J. B. ;Lee, S. J. ;Wang, D. F. ;Lee, Y. P.

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 153 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200777363

✦ Synopsis

Abstract

We studied experimentally the transmission properties of arrays of split‐ring resonators (SRRs) for different electromagnetic polarizations in the microwave‐frequency regime. It is known that, besides the electric response through the cut‐wire like, another electric coupling to the magnetic resonance of the SRR appears when the incident electric field is parallel to the gap‐bearing sides of the SRR. The resonance frequency of this effect is very close to the magnetic resonance. This might degrade or even destroy the left‐handed properties of the material when the SRRs are combined with the wires. To avoid this effect we have changed the structure of SRRs from an asymmetric one with a single gap to a symmetric one with two gaps. The results are also compared with the previous studies. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)