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International Journal of Antennas and Propagation
Volume 2009, Article ID 153850, 5 pages
http://dx.doi.org/10.1155/2009/153850
Research Article

Design of a Dual-Band Sectoral Antenna for Hiperlan2 Application Using Double Layers of Metallic Electromagnetic Band Gap (M-EBG) Materials as a Superstrate

1Faculté des Sciences et Techniques, XLIM - CNRS UMR 6172, 123 Avenue Albert Thomas, 87060 Limoges, France
2CISTEME, Ester Technopole, 87069 Limoges Cedex, France

Received 1 February 2009; Accepted 5 May 2009

Academic Editor: Lei Zhu

Copyright © 2009 M. Hajj 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

A novel design of a sectoral antenna that utilizes a double layer Metallic Electromagnetic Band Gap (M-EBG) as a superstrate for dual band directivity enhancement is presented in this paper. We obtain the different operating frequencies by adjusting the distance of the lower M-EBG layer from printed patch antenna and also the height between upper and lower M-EBG layers. This antenna operates according to a sectoral radiation pattern form presenting a half power beamwidth of at least 6 0 . The proposed structure presents more than 17 dB directivity enhancement at 5.25 GHz and 5.65 GHz as compared to those of a patch antenna with 9 dB directivity. The principle is explained and applied to a Hiperlan2 antenna.