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International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 197945, 5 pages
http://dx.doi.org/10.1155/2012/197945
Research Article

A Compact Multiband Notch UWB Antenna

1Department of Electronics and Communication Engineering, College of Engineering, Guindy, Anna University, Chennai 600025, India
2Rajalakshmi Engineering College, Thandalam, Chennai 602105, India

Received 18 September 2012; Accepted 27 November 2012

Academic Editor: Tayeb A. Denidni

Copyright © 2012 K. Kumar and N. Gunasekaran. 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 simple and a compact coplanar waveguide (CPW) ultrawide band (UWB) antenna is presented. Multiband stop function is achieved by two different types of band stop resonators. One is a tilted square spiral slot resonator of different size and length etched on the patch and the other is a coupled resonator etched on the ground plane. These resonators provide considerable increase in notch bandwidth at the stop bands. The proposed antenna has a total size of  mm2. The designed antenna achieves pass band performance at 1.8–2.1 GHz (15.38%), 3.0–3.2 GHz (6.45%), 4.4–4.7 GHz (6.59%), 6.3-6.4 GHz (1.57%), and 8–11.2 GHz (33.33%) where VSWR <2 and four stop bands at 2.4–2.8 GHz (15.38%), 3.2–3.7 GHz (14.49%), 5.5–6 GHz (8.69%), and 6.5–7 GHz (7.40%) where VSWR is equal to 10. The antenna has a peak gain of 3.8 dBi. The measured results show that the antenna achieves good impedance matching and consistent radiation patterns over an operating bandwidth.