Deterministic Solutions to Improved Generalized Joined Coupler Matrix for Multibeam Antennas

Wu, K; Guo, YJ

Deterministic Solutions to Improved Generalized Joined Coupler Matrix for Multibeam Antennas

Wu, K

Guo, YJ

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Antennas and Propagation, 2023, 71, (12), pp. 9454-9466
Issue Date:: 2023-12-01

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Field	Value	Language
dc.contributor.author	Wu, K https://orcid.org/0000-0003-1298-6404
dc.contributor.author	Guo, YJ
dc.date.accessioned	2024-04-14T20:53:58Z
dc.date.available	2024-04-14T20:53:58Z
dc.date.issued	2023-12-01
dc.identifier.citation	IEEE Transactions on Antennas and Propagation, 2023, 71, (12), pp. 9454-9466
dc.identifier.issn	0018-926X
dc.identifier.issn	1558-2221
dc.identifier.uri	http://hdl.handle.net/10453/177902
dc.description.abstract	Analog beamforming for multibeam antennas is envisioned as a key enabling technology for next-generation mobile communications and sensing networks. Whilst many existing analog multibeam antennas have limited beam forming and steering capabilities, a recently developed generalized joined coupler (GJC) matrix makes it possible to form multiple beams in any direction and steer them independently by tuning the phase shifters. In this work, we propose a novel design method for the GJC matrix by jointly designing both the directional couplers and phase shifters instead of the published coupler-only optimization, thus significantly enhancing the beamforming performance of the GJC matrix. To this end, we derive deterministic solutions to solve the parameters of the directional couplers and phase shifter values beam-by-beam. Specifically, we present algorithms to design Blass-like and Nolen-like GJC matrices. It is further shown that the derived solutions are exact for a full-dimensional Nolen-like GJC matrix to generate orthogonal beams of any dimension. Based on the theoretical analysis, we propose an improved architecture for implementing the GJC matrix. Extensive simulation and numerical results are provided to validate the high performance of the proposed designs and their superiority over the prior art in various low-sidelobe beamforming and beam steering scenarios.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartof	IEEE Transactions on Antennas and Propagation
dc.relation.isbasedon	10.1109/TAP.2023.3315013
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.subject.classification	4006 Communications engineering
dc.subject.classification	4008 Electrical engineering
dc.subject.classification	4009 Electronics, sensors and digital hardware
dc.title	Deterministic Solutions to Improved Generalized Joined Coupler Matrix for Multibeam Antennas
dc.type	Journal Article
utslib.citation.volume	71
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	closed_access	*
dc.date.updated	2024-04-14T20:53:51Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	71
utslib.citation.issue	12

Abstract:

Analog beamforming for multibeam antennas is envisioned as a key enabling technology for next-generation mobile communications and sensing networks. Whilst many existing analog multibeam antennas have limited beam forming and steering capabilities, a recently developed generalized joined coupler (GJC) matrix makes it possible to form multiple beams in any direction and steer them independently by tuning the phase shifters. In this work, we propose a novel design method for the GJC matrix by jointly designing both the directional couplers and phase shifters instead of the published coupler-only optimization, thus significantly enhancing the beamforming performance of the GJC matrix. To this end, we derive deterministic solutions to solve the parameters of the directional couplers and phase shifter values beam-by-beam. Specifically, we present algorithms to design Blass-like and Nolen-like GJC matrices. It is further shown that the derived solutions are exact for a full-dimensional Nolen-like GJC matrix to generate orthogonal beams of any dimension. Based on the theoretical analysis, we propose an improved architecture for implementing the GJC matrix. Extensive simulation and numerical results are provided to validate the high performance of the proposed designs and their superiority over the prior art in various low-sidelobe beamforming and beam steering scenarios.

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http://hdl.handle.net/10453/177902