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International Journal of Antennas and Propagation
Volume 2009 (2009), Article ID 394801, 7 pages
http://dx.doi.org/10.1155/2009/394801
Application Article

Low Profile EBG Resonator Antennas

1Centre d'Ingénierie des Systèmes en Télécommunication, en ÉlectroMagnétisme et en Électronique (CISTEME), Faculté des Sciences, Université de Limoges, 123 rue Albert Thomas, 87060 Limoges Cedex, France
2Ondes et Systèmes Associés (OSA), Department of XLIM Laboratory, Faculté des Sciences, Université de Limoges, 123 rue Albert Thomas, 87060 Limoges Cedex, France

Received 21 June 2008; Revised 5 December 2008; Accepted 30 March 2009

Academic Editor: Hisashi Morishita

Copyright © 2009 R. Chantalat 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

An Electromagnetic Band Gap (EBG) antenna is a planar structure which is composed of a cavity and an EBG material. In most applications, the height of the EBG antenna is half wavelength. We present in this paper the conditions to reduce the profile of an EBG antenna to subwavelength values. It could be achieved by using a cavity upper interface which exhibits negative reflection phase. Frequency Selective Surface (FSS) based on Babinet principle, that satisfies this condition, will be described using full wave analysis. These periodic metallic arrays are employed in the design of a low profile EBG antenna which has a directivity of 10 dBi. As this EBG antenna design is similar to a small antenna over an Artificial Magnetic Conductors (AMC) surfaces or High Impedance Surface (HIS), the EBG antenna principle could be a new theory approach for the AMC or HIS. This point is discussed in this paper.