Wideband, High-Density Circularly Polarized Array with Reduced Mutual Coupling and Enhanced Realized Gain

Chen, Z; Tang, MC; Li, M; Yi, D; Mu, D; Ziolkowski, RW

Wideband, High-Density Circularly Polarized Array with Reduced Mutual Coupling and Enhanced Realized Gain

Chen, Z Tang, MC Li, M Yi, D Mu, D Ziolkowski, RW

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Antennas and Propagation, 2022, 70, (2), pp. 1132-1143
Issue Date:: 2022-02-01

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Field	Value	Language
dc.contributor.author	Chen, Z
dc.contributor.author	Tang, MC
dc.contributor.author	Li, M
dc.contributor.author	Yi, D
dc.contributor.author	Mu, D
dc.contributor.author	Ziolkowski, RW
dc.date.accessioned	2023-01-19T02:02:33Z
dc.date.available	2023-01-19T02:02:33Z
dc.date.issued	2022-02-01
dc.identifier.citation	IEEE Transactions on Antennas and Propagation, 2022, 70, (2), pp. 1132-1143
dc.identifier.issn	0018-926X
dc.identifier.issn	1558-2221
dc.identifier.uri	http://hdl.handle.net/10453/165176
dc.description.abstract	A planar single-layer parasitic swastika-shaped structure, which serves as an effective isolator, is developed for mutual coupling reduction in wideband, high-density circularly polarized (CP) arrays. A closely spaced two-element CP antenna array demonstrates the efficacy of the approach. The currents induced by the CP coupling are effectively canceled out when this isolator is integrated into it. The antenna elements are co-planar. They are arranged with a center-to-center distance of 0.4λ L (λL) being the wavelength of the lower bound of the array's operational bandwidth) and have an extremely small edge-to-edge distance of ∼ 0.024λ L. The parasitic element yields an increase of the isolation level between the antenna elements of more than 9.4 dB over the entire operational band, with a maximum improvement of 20.4 dB. Moreover, the antenna elements realize a modest maximum gain improvement of ∼ 1.2 dB in the boresight direction over the same band. The overlapped impedance matching and 3 dB axial ratio (AR) bandwidths cover the range of 1.7-2.7 GHz, a ∼ 45% fractional bandwidth. A prototype was fabricated and measured; the measured results are in good agreement with their simulated values.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation	http://purl.org/au-research/grants/arc/DP160102219
dc.relation.ispartof	IEEE Transactions on Antennas and Propagation
dc.relation.isbasedon	10.1109/TAP.2021.3111297
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.title	Wideband, High-Density Circularly Polarized Array with Reduced Mutual Coupling and Enhanced Realized Gain
dc.type	Journal Article
utslib.citation.volume	70
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	1005 Communications Technologies
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2024-02-01T00:00:00+1000Z
dc.date.updated	2023-01-19T02:02:29Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	70
utslib.citation.issue	2

Abstract:

A planar single-layer parasitic swastika-shaped structure, which serves as an effective isolator, is developed for mutual coupling reduction in wideband, high-density circularly polarized (CP) arrays. A closely spaced two-element CP antenna array demonstrates the efficacy of the approach. The currents induced by the CP coupling are effectively canceled out when this isolator is integrated into it. The antenna elements are co-planar. They are arranged with a center-to-center distance of 0.4λ L (λL) being the wavelength of the lower bound of the array's operational bandwidth) and have an extremely small edge-to-edge distance of ∼ 0.024λ L. The parasitic element yields an increase of the isolation level between the antenna elements of more than 9.4 dB over the entire operational band, with a maximum improvement of 20.4 dB. Moreover, the antenna elements realize a modest maximum gain improvement of ∼ 1.2 dB in the boresight direction over the same band. The overlapped impedance matching and 3 dB axial ratio (AR) bandwidths cover the range of 1.7-2.7 GHz, a ∼ 45% fractional bandwidth. A prototype was fabricated and measured; the measured results are in good agreement with their simulated values.

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http://hdl.handle.net/10453/165176