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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 614754, 6 pages
http://dx.doi.org/10.1155/2013/614754
Research Article

A Compact Size 4–19.1 GHz Heart Shape UWB Antenna with Triangular Patches

1Electrical-Electronics Engineering Department, Faculty of Engineering, Yeditepe University, 34755 Istanbul, Turkey
2TRON Elektronik Sist. San. ve Tic. A.S., 34776 Istanbul, Turkey

Received 31 May 2013; Revised 19 November 2013; Accepted 20 November 2013

Academic Editor: Alistair P. Duffy

Copyright © 2013 Gokmen Isik and Serkan Topaloglu. 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 ultrawideband antenna is designed, simulated, and realized. To overcome the narrow bandwidth characteristics of basic patch antennas, the structure of the radiation pattern is optimized by the aid of elliptical and rectangular patches. Also triangular patches are applied to the antenna edge in order to enhance the VSWR and gain properties. A typical VSWR of 1.5 (less than 2 in the whole frequency range) and a typical gain of 2 dBi (mainly above 1 dBi in the whole frequency range) are observed. The simulations present that the designed antenna has a bandwidth ratio of ~5 : 1 within the frequency range of 4–19.1 GHz with compact dimensions of 25 × 26 mm2. It is fabricated on a 0.5 mm thick, RO3035 substrate. The input impedance, gain, and radiation characteristics of the antenna are also presented. With these properties, it is verified that, with its novel shape, the proposed antenna can be used for various UWB applications.