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International Journal of Antennas and Propagation
Volume 2014, Article ID 193690, 9 pages
http://dx.doi.org/10.1155/2014/193690
Research Article

Ultrasubwavelength Ferroelectric Leaky Wave Antenna in a Planar Substrate-Superstrate Configuration

1Department of Astronautical, Electrical and Energetic Engineering (DIAEE), Sapienza University of Rome, Via Eudossiana 18, 00148 Roma, Italy
2Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Via Eudossiana 18, 00148 Roma, Italy

Received 20 May 2014; Revised 14 August 2014; Accepted 15 August 2014; Published 31 August 2014

Academic Editor: Yingsong Li

Copyright © 2014 G. Lovat 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

The possibility of achieving directive fan-beam radiation with planar Fabry-Pérot cavity antennas constituted by an upper ferroelectric thin film and a lower ground plane having ultrasubwavelength thickness is studied by means of a simple transverse-equivalent-network approach and a cylindrical leakywave analysis, deriving simple design formulas. The performance of the proposed antenna is investigated in terms of power density radiated at broadside and directivity in the principal planes, pointing out the main limitations and tradeoffs associated with the reduced thickness.