Summary

International Symposium on Antennas and Propagation

2013

Session Number:TA-P

Session:

Number:TA-P-30

A Conical Quadrifilar Helix Antenna for GNSS Applications

Baiquan Ning,  Juan Lei,  Yongchao Cao,  Liang Dong,  

pp.-

Publication Date:2013/10/22

Online ISSN:2188-5079

DOI:10.34385/proc.54.TA-P-30

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Summary:
A broadband conical quadrifilar helix antenna is presented in this paper. The broadband characteristic is achieved by tapering the helices, utilizing conical geometry and adjusting the dimensions of the cone-shape support. The bandwidth, defined for a VSWR<2, is about 25% across 1155-1327MHz and 1447-1617MHz, covering all of the frequencies of Global Navigation Satellite System including GPS, GLONASS, Galileo and Compass. The antenna is fed by a wideband four-outputports feed network with equal magnitude and consistent 90° phase shift. The final antenna obtains excellent circular polarisation, a good gain (greater than 4.5dB at boresight) and good axial-ratio performance over a wide angular range for Global Navigation Satellite System applications.