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International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 859429, 7 pages
http://dx.doi.org/10.1155/2012/859429
Research Article

A Method for Extending the Bandwidth of Metamaterial Absorber

Department of Electronic Engineering, Kyonggi University, Kyonggi-do, Suwon 443-760, Republic of Korea

Received 13 September 2012; Accepted 28 October 2012

Academic Editor: Alejandro Lucas Borja

Copyright © 2012 Hong-Min Lee and Hyung-Sup Lee. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present a method for extending the bandwidth of a metamaterial absorber (MMA) with multiresonance structure. The basic unit cell of the MMAs consists of a periodic arrangement of an electric-LC (ELC) resonator and a square loop structure. The absorption bandwidth of an MMA is effectively extended by combining five unit cell structures with different geometric dimensions into a coplanar unit cell. Experimental results show that the fabricated MMA is 0.8 mm (0.0026  ) thick with a peak absorption rate of 93% at 10 GHz and a full width at half maximum (FWHM) bandwidth of 970 MHz.