Table of Contents
International Journal of Microwave Science and Technology
Volume 2013 (2013), Article ID 354789, 8 pages
http://dx.doi.org/10.1155/2013/354789
Research Article

A Quasi-Yagi Antenna Backed by a Jerusalem Cross Frequency Selective Surface

1Tampa Microwave, Tampa, FL 33626, USA
2Department of Electrical Engineering, University of South Florida, Tampa, FL 33620, USA

Received 6 June 2012; Accepted 14 January 2013

Academic Editor: Walter De Raedt

Copyright © 2013 Sergio E. Melais 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 quasi-Yagi antenna is developed to operate at 2.4 GHz (ISM band) presenting a low profile and off-axis radiation when packaged over a metal ground plane. The off-axis radiation is realized by incorporating a Jerusalem cross frequency selective surface (JC-FSS) as the ground plane for the antenna. A JC-FSS is preferred because of its frequency stability in the operating band for a large angular spectrum (70°) of TE- and TM-polarized incident waves. In this research, the substrate of the antenna flush-mounted on top of the FSS is added to the JC-FSS model and allows for a smaller cell grid. The prepared quasi-Yagi antenna over the JC-FSS offered 260 MHz of functional bandwidth and 54° of beam tilt towards the end-fire direction. To the best of the authors’ knowledge this is the first instance that these two structures are combined for off-axis radiation. Additionally, to support the preferred use of the JC-FSS, the quasi-Yagi is backed by a square patch (SP) FSS for comparison purposes.