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International Journal of Antennas and Propagation
Volume 2014, Article ID 646394, 6 pages
http://dx.doi.org/10.1155/2014/646394
Research Article

A Multiband Printed Log-Periodic Dipole Array for Wireless Communications

Dipartimento di Ingegneria Elettrica ed Elettronica, Università di Cagliari, Piazza D’Armi, 09123 Cagliari, Italy

Received 8 May 2014; Accepted 4 July 2014; Published 15 July 2014

Academic Editor: Renato Cicchetti

Copyright © 2014 Giovanni Andrea Casula and Paolo Maxia. 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 multiband printed Log-periodic dipole array (LPDA) antenna for wireless communications is presented. The antenna has been designed starting from Carrel’s theory, optimized using CST Microwave Studio 2012, and then realized. The comparison between simulated and measured results shows that the proposed antenna can be used for wireless communications both in the S (2.4–3 GHz) and in the C (5.2–5.8 GHz) frequency bands, with very good input matching and a satisfactory end-fire radiation pattern. Moreover, it has a compact size, is very easy to realize, and presents an excellent out-of-band rejection, without the use of stop-band filters, thus avoiding interference out of its operating frequency band.