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International Journal of Antennas and Propagation
Volume 2014 (2014), Article ID 472397, 5 pages
http://dx.doi.org/10.1155/2014/472397
Research Article

A RHCP Microstrip Antenna with Ultrawide Beamwidth for UHF Band Application

Institute of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China

Received 1 March 2014; Revised 13 April 2014; Accepted 14 April 2014; Published 18 May 2014

Academic Editor: Wenxing Li

Copyright © 2014 Yuan-zhu Liu 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

A novel right-hand circularly polarized (RHCP) UHF microstrip antenna with 3 dB beamwidth of more than 150° is presented in this paper. The 3 dB RHCP beamwidth can be broadened by utilizing a combined ground structure with a hollow truncated cone ground plane and a metallic rectangular plate. Optimizing the half-angle of cone and the cone height , a 3 dB RHCP beamwidth of more than 200° can be acquired, which is about 120° greater than its corresponding regular RHCP microstrip antenna. There is a good agreement between the measured results and simulated results for the proposed antenna operating in UHF band.