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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 382958, 5 pages
http://dx.doi.org/10.1155/2013/382958
Research Article

Modified Dual-Band Stacked Circularly Polarized Microstrip Antenna

Institute of Radio Wave Propagation, School of Science, Xidian University, Xi’an, Shaanxi 710071, China

Received 22 November 2012; Revised 25 February 2013; Accepted 19 March 2013

Academic Editor: Atif Shamim

Copyright © 2013 Guo 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 high-performance circularly polarized (CP) antenna is proposed in this paper. Two separate antennas featuring the global positioning system (GPS) dual-band operation (1.575 GHz and 1.227 GHz for L1 band and L2 band, resp.) are integrated with good isolation. To enhance the gain at low angle, a new structure of patch and two parasitic metal elements are introduced. With the optimized design, good axial ratio and near-hemispherical radiation pattern are obtained.