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A low-profile wide-beamwidth circularly-polarized antenna via two pairs of parallel dipoles in a square contour
Luo Y.1; Chu Q.-X.1; Zhu L.2
2015
Source PublicationIEEE Transactions on Antennas and Propagation
ISSN0018926X
Volume63Issue:3Pages:931
Abstract

A circularly polarized antenna with wide axial-ratio beamwidth is presented by placing two pairs of parallel dipoles in a square contour. Firstly, our study demonstrates that circular polarization can be achieved at the broadside by setting a 90° phase difference between the vertical and horizontal paired-dipoles. Secondly, the principle of wide-beamwidth circularly-polarized radiation is described under the similarity in polar and azimuthal radiation pattern for a pair of parallel dipoles. After the spacing between two parallel dipoles is studied, the similar radiation patterns in these two orthogonal planes are derived. As such, a wide-beamwidth circular polarization can be achieved by placing the two pairs of parallel dipoles vertically and horizontally while setting a 90° phase difference between them. In final, a circularly-polarized printed antenna is designed and fabricated on a single dielectric substrate. The two arms of its four dipoles are formed on the lower and upper interfaces of the substrate, and they are excited by a 1-to-4 probe-to-microstrip feeding network. Experimental results show good agreement with simulated ones in terms of radiation pattern/gain, axial ratio and returned loss. In particular, the 3-dB axial ratio beamwidth at the central frequency of 1.6 GHz has extended to 126° in an angular range from-63° to +63°. The fabricated antenna exhibits a low-profile property with the height of 0.0043 free-space wavelength. © 2015 IEEE.

KeywordAxial Ratio Circularly Polarized Antenna Dipoles Microstrip-line Feeder Wide Beamwidth
DOI10.1109/TAP.2014.2387438
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Telecommunications
WOS SubjectEngineering, Electrical & Electronic, Telecommunications
WOS IDWOS:000351087800006
The Source to ArticleScopus
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Cited Times [WOS]:53   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China
2.Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China
Recommended Citation
GB/T 7714
Luo Y.,Chu Q.-X.,Zhu L.. A low-profile wide-beamwidth circularly-polarized antenna via two pairs of parallel dipoles in a square contour[J]. IEEE Transactions on Antennas and Propagation,2015,63(3):931.
APA Luo Y.,Chu Q.-X.,&Zhu L..(2015).A low-profile wide-beamwidth circularly-polarized antenna via two pairs of parallel dipoles in a square contour.IEEE Transactions on Antennas and Propagation,63(3),931.
MLA Luo Y.,et al."A low-profile wide-beamwidth circularly-polarized antenna via two pairs of parallel dipoles in a square contour".IEEE Transactions on Antennas and Propagation 63.3(2015):931.
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