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International Journal of Antennas and Propagation
Volume 2016 (2016), Article ID 5109875, 7 pages
Research Article

Design of a Broadband Inverted Conical Quadrifilar Helix Antenna

1School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China
2Shanghai Institute of Aerospace System Engineering, Shanghai 200108, China
3Shanghai Satellite Engineering Institute, Shanghai 200240, China
4School of Electronic Engineering, Xidian University, Xi’an, Shanxi 710071, China

Received 17 November 2015; Revised 8 January 2016; Accepted 11 January 2016

Academic Editor: Ikmo Park

Copyright © 2016 Jingyan Mo 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.


This paper introduces the design of a broadband inverted conical circularly polarized quadrifilar helix antenna (QHA). The antenna has many good characteristics, including wide beam and broad bandwidth, which are achieved by utilizing inverted conical geometry and adjusting the dimensions of the inverted conical support. The antenna is fed by a wideband network to provide 90° phase difference between the four arms with constant amplitude. The antenna impedance and axial ratio bandwidth values are more than 39% and 31.5%, respectively. The measured results coincide well with the simulated ones, which verified the effectiveness of the proposed design.