NDLI: A Circularly Polarized Pattern Diversity Antenna for Hemispherical Coverage

Content Provider	IEEE Xplore Digital Library
Author	Changjiang Deng Yue Li Zhijun Zhang Zhenghe Feng
Copyright Year	1963
Abstract	In this communication, a circularly polarized (CP) antenna is proposed for satellite communication applications. The proposed antenna consists of two parts. One part is in-phase-fed folded monopoles with omnidirectional CP radiation pattern, and the other part is sequential-fed L-shaped monopoles with broadside CP radiation pattern. By combining the two parts as a pattern diversity antenna, upper hemispherical coverage with left-handed circular polarization (LHCP) is achieved in a small volume of 0.38λ×0.38λ×0.071λ ( λ is the free-space wavelength). A prototype of the proposed antenna operating at 1.575 GHz has been built and tested. The measured overlapping bandwidth for both the two patterns with -10-dB impedance bandwidth and 3-dB axial-ratio (AR) is 6.7% (1.515-1.62 GHz), also with high port isolation. In addition, the AR and gain coverage over the upper hemisphere is discussed in detail.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	5365
Ending Page	5369
Page Count	5
File Size	1036960
File Format	PDF
ISSN	0018926X
Volume Number	62
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gain Bandwidth Antenna measurements Antenna radiation patterns Substrates satellite communications Circular polarization hemispherical coverage pattern diversity antenna
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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