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International Journal of Antennas and Propagation
Volume 2014, Article ID 847169, 6 pages
http://dx.doi.org/10.1155/2014/847169
Research Article

A Compact Vivaldi Shaped Partially Dielectric Loaded TEM Horn Antenna for UWB Communication

1Electronics & Communication Engineering Department, Yildiz Technical University, Esenler, 34220 Istanbul, Turkey
2Aeronautics & Space Technologies Institute, Turkish Air Force Academy, Yesilyurt, 34149 Istanbul, Turkey

Received 2 May 2014; Revised 21 July 2014; Accepted 1 August 2014; Published 10 September 2014

Academic Editor: Li Wenxing

Copyright © 2014 Mustafa İlarslan 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

Ultrawideband (UWB) antennas are of huge demand and Vivaldi antennas as well as the TEM horn antennas are good candidates for UWB applications as they both have relatively simple geometry and high gain over a wide bandwidth. The aim of this study is to design a compact antenna that achieves maximum gain over a bandwidth between 1.5 and 10.6 GHz while minimizing its size. The idea is to make use of combined respective advantages of Vivaldi and TEM horn antennas to achieve the desired goals by shaping the TEM horn antenna to look like a Vivaldi antenna. The antenna structure is modified by a dielectric load in the center to increase the gain bandwidth. It is placed in a surrounding box made of PEC material to reduce the undesired side lobes and to obtain more directive radiation pattern. The simulations are performed by using the CST STUDIO SUITE electromagnetic (EM) simulation software and they are later verified by the actual measurements. The Vivaldi shaped partially dielectric loaded (VS-PDL) TEM horn antenna is proposed as a compact UWB antenna for systems using the newly established UWB band and also for the communication systems of popular bands like ISM, Wi-Fi, and GSM.