Open AccessImproved Low-Profile Helical Antenna Design for INMARSAT Applications
Author(s) -
Shiqiang Fu,
Yuan Cao,
Yue Zhou,
Shaojun Fang
Publication year - 2012
Publication title -
international journal of antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.282
H-Index - 37
eISSN - 1687-5877
pISSN - 1687-5869
DOI - 10.1155/2012/829371
Subject(s) - antenna factor , stub (electronics) , coaxial antenna , antenna measurement , standing wave ratio , impedance matching , antenna rotator , antenna (radio) , antenna tuner , acoustics , engineering , electronic engineering , radiation pattern , electrical engineering , microstrip antenna , electrical impedance , physics
A new low-profile variable pitch angle cylindrical helical antenna employing a copper strip as impedance transformer is proposed in this paper. Under the circumstance of a limited antenna height, the circular polarization performance of the antenna has been enhanced by changing the pitch angle and the input impedance matching has been improved by adjusting the copper strip match stub. The design method of the proposed antenna is given. The optimal antenna structure for INMARSAT application has been fabricated and measured. The measured results show that in the whole maritime satellite communication work band the VSWR is less than 1.2, its antenna gain is higher than 9dBi, and the axial ratio is lower than 2.5dB. The experimental results have a good agreement with the simulations. The proposed antenna is compact and easy tuning. It provides a promising antenna element for maritime satellite communication applications. Copyright © 2012 Shiqiang Fu et al.
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