Compact Multi-Beamforming Networks Based on Generalized Joined Coupler Matrix With Flexible Beam Angles and Low Sidelobe Levels

Xu, Y; Zhu, H; Guo, YJ

Compact Multi-Beamforming Networks Based on Generalized Joined Coupler Matrix With Flexible Beam Angles and Low Sidelobe Levels

Xu, Y Zhu, H Guo, YJ

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Publisher:: IEEE
Publication Type:: Journal Article
Citation:: IEEE Open Journal of Antennas and Propagation, 2024, PP, (99), pp. 1-1
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Xu, Y
dc.contributor.author	Zhu, H
dc.contributor.author	Guo, YJ
dc.date.accessioned	2024-08-07T04:31:53Z
dc.date.available	2024-08-07T04:31:53Z
dc.date.issued	2024-01-01
dc.identifier.citation	IEEE Open Journal of Antennas and Propagation, 2024, PP, (99), pp. 1-1
dc.identifier.issn	2637-6431
dc.identifier.issn	2637-6431
dc.identifier.uri	http://hdl.handle.net/10453/180199
dc.description.abstract	The investigation of beamforming networks (BFNs) for multibeam antenna arrays has been ongoing for decades. However, enabling individually controllable multibeams employing a BFN has remained a recognizable challenge. The utilization of generalized joined coupler (GJC) matrices has demonstrated its efficacy as a viable solution for achieving multibeams with independent individual beam directions and minimal sidelobe levels. In this paper, for the first time, the design of the GJC matrix as a multibeam feeding network is reported using planar circuits and verified experimentally. The GJC matrix design is built based on a mixture of one-section and two-section branch-line couplers, which are able to realize a wide range of coupling coefficients. A thorough investigation from theoretical analysis to electromagnetic modeling is conducted on one-section and two-section branch-line couplers, and a general design guideline is given for choosing the appropriate type and dimensions for each coupler in a GJC matrix. Then, two types of BFN using microstrip line working at 5 GHz and stripline working at 12 GHz are designed, fabricated and measured, respectively. Different beam angles are realized to demonstrate the independent and simultaneous multibeam steering functionality, the experimental results agree well with the theoretical ones.
dc.language	en
dc.publisher	IEEE
dc.relation.ispartof	IEEE Open Journal of Antennas and Propagation
dc.relation.isbasedon	10.1109/OJAP.2023.3336764
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	4006 Communications engineering
dc.subject.classification	4008 Electrical engineering
dc.title	Compact Multi-Beamforming Networks Based on Generalized Joined Coupler Matrix With Flexible Beam Angles and Low Sidelobe Levels
dc.type	Journal Article
utslib.citation.volume	PP
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
pubs.organisational-group	University of Technology Sydney/All Manual Groups
pubs.organisational-group	University of Technology Sydney/All Manual Groups/Global Big Data Technologies Research Centre (GBDTC)
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.rights.license	This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated	2024-08-07T04:31:49Z
pubs.issue	99
pubs.publication-status	Published
pubs.volume	PP
utslib.citation.issue	99

Abstract:

The investigation of beamforming networks (BFNs) for multibeam antenna arrays has been ongoing for decades. However, enabling individually controllable multibeams employing a BFN has remained a recognizable challenge. The utilization of generalized joined coupler (GJC) matrices has demonstrated its efficacy as a viable solution for achieving multibeams with independent individual beam directions and minimal sidelobe levels. In this paper, for the first time, the design of the GJC matrix as a multibeam feeding network is reported using planar circuits and verified experimentally. The GJC matrix design is built based on a mixture of one-section and two-section branch-line couplers, which are able to realize a wide range of coupling coefficients. A thorough investigation from theoretical analysis to electromagnetic modeling is conducted on one-section and two-section branch-line couplers, and a general design guideline is given for choosing the appropriate type and dimensions for each coupler in a GJC matrix. Then, two types of BFN using microstrip line working at 5 GHz and stripline working at 12 GHz are designed, fabricated and measured, respectively. Different beam angles are realized to demonstrate the independent and simultaneous multibeam steering functionality, the experimental results agree well with the theoretical ones.

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http://hdl.handle.net/10453/180199