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International Journal of Antennas and Propagation
Volume 2015, Article ID 329453, 9 pages
http://dx.doi.org/10.1155/2015/329453
Research Article

Circularly Polarized Triband Printed Quasi-Yagi Antenna for Millimeter-Wave Applications

1Microstrip Department, Electronics Research Institute, Cairo 21622, Egypt
2Hawaii Center for Advanced Communications (HCAC), Honolulu, HI 96822, USA

Received 30 October 2014; Revised 21 January 2015; Accepted 25 January 2015

Academic Editor: Atsushi Mase

Copyright © 2015 Dalia M. Elsheakh and Magdy F. Iskander. 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

This paper describes the design and development of a triband with circularly polarized quasi-Yagi antenna for ka-band and short range wireless communications applications. The proposed antenna consists of an integrated balun-fed printed dipole, parasitic folded dipole and a short strip, and a modified ground plane. The antenna structure, together with the parasitic elements, is designed to achieve circular polarization and triband operating at resonant frequencies of 13.5 GHz, 30 GHz, and 60 GHz. Antenna design was first simulated using HFSS ver.14, and the obtained results were compared with experimental measurements on a prototype developed on a single printed circuit board. Achieved characteristics include −10 dB impedance bandwidth at the desired bands, circular polarization axial ratio  dB, front to back ratio of 6 dB, gain value of about 4 dBi, and average radiation efficiency of 60%. The paper includes comparison between simulation and experimental results.