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International Journal of Antennas and Propagation
Volume 2014 (2014), Article ID 904374, 9 pages
http://dx.doi.org/10.1155/2014/904374
Research Article

Novel Dual Band Microstrip Circular Patch Antennas Loaded with ENG and MNG Metamaterials

1Department of Electrical and Electronic Engineering, BUET, Dhaka 1000, Bangladesh
2Department of ECE, University of British Columbia, Okanagan, BC, Canada

Received 13 September 2013; Accepted 20 November 2013; Published 11 February 2014

Academic Editor: Guo Qing Luo

Copyright © 2014 Md. Ababil Hossain et al. 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

Novel design of a dual band microstrip circular patch antenna loaded with ENG (ε negative) metamaterial has been shown in the first section. Using ENG metamaterial instead of the conventional dielectric, unconventional TMδ10 ( ) mode was produced to yield a dual band performance. Optimized parameters such as permittivity (ε1) and filling ratio ( ) of metamaterials were selected with the aid of a MATLAB based parameter optimization algorithm, developed for all these sort of patch antennas. In the second section, a dual band circular patch antenna loaded with MNG (µ negative) metamaterial has been reported. An unconventional modified TMδ10 ( ) mode has been produced along with conventional TM110 mode due to using MNG metamaterial. Here also the optimum values of permeability (µ1) and filling ratio ( ) for these sorts of patch antennas have been calculated from a MATLAB based parameter optimization algorithm. Both the proposed antennas provide good and resonance and satisfactory radiation performances (directivity, radiation efficiency, and gain) with a dual band performance.