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International Journal of Antennas and Propagation
Volume 2012, Article ID 324197, 4 pages
Research Article

Wideband Circularly Polarized Dielectric Rod Antenna

1School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
2Shanghai Radio Equipment Research Institute, Shanghai 200438, China

Received 16 January 2012; Revised 9 April 2012; Accepted 22 April 2012

Academic Editor: Hamsakutty Vettikalladi

Copyright © 2012 Min Guo 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.


A new dielectric rod antenna (DRA) is introduced to produce circular polarization (CP) over a wide frequency band without a complex feed network. Along with the simulated results, measured results of the antenna prototype are presented, showing a 3 dB axial ratio (AR) CP bandwidth of 17.7%. The radiation characteristics of the fabricated antenna are also demonstrated showing the measured gain of better than 6.2 dBi. Moreover, the measured impedance bandwidth (VSWR ) reaches 20.1%, from 8.75 GHz to 10.7 GHz, while the CP beamwidth (AR  dB) at the central frequency is measured over 120°.