DocumentCode
3704673
Title
Analysis of circular polarization of the Quadrifilar Helix Antenna in the presence of ground plane for LEO satellites
Author
M. Ahmad;M. Amin;A.A. Khan;M.T. Azim;M.A. Alim
Author_Institution
Department of Electrical Engineering, COMSATS Institute of Information Technology, Lahore, Pakistan
fYear
2015
Firstpage
1543
Lastpage
1546
Abstract
In this research paper, circular polarization of Quadrifilar Helix Antenna (QHA) is investigated under the effects of large fixed metallic ground plane. Variations in the height of QHA above the ground plane affect the circular polarization of QHA. It is noted that boresight axial ratio and 3dB axial ratio beamwidth of QHA fluctuate as height of the QHA ascends above the reference ground plane. Deployment of QHA between the heights of 0.57 λ to 0.7 λ generates 3dB axial ratio beamwidth that is broader than 1000. Input characteristics of QHA are also investigated for varying sized finite ground planes. Excellent circular polarization and wide 3dB axial ratio beamwidth support deployment of QHA on decks of Low Earth Orbit (LEO) satellite for reliable communication.
Keywords
"Helical antennas","Polarization","Microwave antennas","Satellite antennas","Antenna radiation patterns","Antenna measurements","Low earth orbit satellites"
Publisher
ieee
Conference_Titel
Microwave Conference (EuMC), 2015 European
Type
conf
DOI
10.1109/EuMC.2015.7346070
Filename
7346070
Link To Document