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A Feeding Technique for Wideband CP Patch Antenna Based on 90° Phase Difference Between Tapped Line and Parallel Coupled Line
Qiong-Sen Wu; Xiao Zhang; Lei Zhu
2019-05-31
Source PublicationIEEE Antennas and Wireless Propagation Letters
ISSN1536-1225
Volume18Issue:7Pages:1468-1471
Abstract

A feeding technique for wideband circularly polarized (CP) patch antenna based on the 90° phase difference between tapped line and parallel coupled line in a feeding network is proposed. The tapped line and parallel coupled line are equivalently regarded as a direct coupling element with 0° phase delay and a J-inverter coupling element with 90° phase delay, respectively. In design, two identical λ/2 resonators are employed to excite two orthogonal modes for wideband equal magnitude. Meanwhile, the feeding lines are tapped and coupled to the two resonators, and tapped line and coupled line can inherently provide 90° phase difference as demanded for CP radiation with no need for an additional delay line or a phase shifter. The whole structure is modeled as an equivalent three-port network, and the theoretical axial ratio (AR) is calculated with the magnitude and phase of the voltage at the radiation conductance. Since two minima in AR response emerge, this proposed patch antenna can achieve a wide AR bandwidth. The theoretical performance is finally verified by a fabricated CP patch antenna prototype with a profile of 0.042λ, and the 3 dB AR fractional bandwidth is 7.07%.

KeywordCircular Polarization Parallel Coupled Line Patch Antenna Tapped Line Wideband
DOI10.1109/LAWP.2019.2920256
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Telecommunications
WOS SubjectEngineering, Electrical & Electronic ; Telecommunications
WOS IDWOS:000474595700034
Scopus ID2-s2.0-85068695311
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorLei Zhu
AffiliationDepartment of Electrical and Computer Engineering,Faculty of Science and Technology,University of Macau,Macao
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Qiong-Sen Wu,Xiao Zhang,Lei Zhu. A Feeding Technique for Wideband CP Patch Antenna Based on 90° Phase Difference Between Tapped Line and Parallel Coupled Line[J]. IEEE Antennas and Wireless Propagation Letters,2019,18(7):1468-1471.
APA Qiong-Sen Wu,Xiao Zhang,&Lei Zhu.(2019).A Feeding Technique for Wideband CP Patch Antenna Based on 90° Phase Difference Between Tapped Line and Parallel Coupled Line.IEEE Antennas and Wireless Propagation Letters,18(7),1468-1471.
MLA Qiong-Sen Wu,et al."A Feeding Technique for Wideband CP Patch Antenna Based on 90° Phase Difference Between Tapped Line and Parallel Coupled Line".IEEE Antennas and Wireless Propagation Letters 18.7(2019):1468-1471.
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