Differential-Fed Dual-Polarized Antenna Decoupling Techniques for in-Band Full-Duplex

Chen, Yuenian

Differential-Fed Dual-Polarized Antenna Decoupling Techniques for in-Band Full-Duplex

Chen, Yuenian

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Publication Type:: Thesis
Issue Date:: 2024

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Field	Value	Language
dc.contributor.author	Chen, Yuenian
dc.date.accessioned	2024-09-30T05:34:51Z
dc.date.available	2024-09-30T05:34:51Z
dc.date.issued	2024
dc.identifier.uri	http://hdl.handle.net/10453/181099
dc.description	University of Technology Sydney. Faculty of Engineering and Information Technology.	en_US.UTF-8
dc.description.abstract	The increasing number of wireless devices has resulted in a growing problem of spectrum congestion. In-band full-duplex (IBFD), which allows for simultaneous transmission (TX) and reception (RX) of signals in the same frequency band, is a promising solution to this issue. However, IBFD is challenging because of the significant self-interference (SI) between TX and RX channels. Self-interference cancellation (SIC) techniques provide an effective solution to SI suppression. In this dissertation, several novel SIC/decoupling techniques are proposed, which can be classified into two types. The first type pertains to dual-polarized four-port IBFD antennas, which encompass four channels, each supporting two orthogonal polarizations for both TX and RX. After that, to further improve the space utilization efficiency, a four-port IBFD antenna system with shared-aperture is developed based on a novel common-mode (CM) / differentialmode (DM) combination method. In the first type, the primary emphasis is placed on the feeding network of the antenna system, while the decoupling methods between antenna elements remain relatively normal and occupies additional space. To solve the inner coupling between antenna elements, the second type of decoupling techniques are proposed for extremely closely spaced IBFD antennas, which become imperative in applications where space is limited, such as in mobile devices and portable terminals. This dissertation introduces the differential symmetrical decoupling network (DSDN), a novel method specifically designed to decouple differential-fed antennas (DFAs) while preserving their structural symmetry. Additionally, a novel and systematic approach is introduced, referred to as the S-parameter consistency method, to address the challenges of decoupling dual-polarized patch antennas with extremely small spacing. As the necessity of full-duplex antennas lies in their ability to significantly improve data throughput, reduce latency, maximize spectrum efficiency, increase network capacity, and enhance reliability, the proposed SIC/decoupling techniques are indispensable for enabling IBFD antennas in modern wireless communication systems and networks.	en_US.UTF-8
dc.format	Thesis (PhD)
dc.language.iso	en_US	en_US.UTF-8
dc.relation	https://opus.lib.uts.edu.au/bitstream/10453/181099/1/thesis.pdf
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	The author owns the copyright in this thesis including all reproduction and reuse rights for the work. The work may not be altered without the permission of the copyright owner. Attribution is essential when quoting or paraphrasing from this thesis.
dc.rights	© 2024 Yuenian Chen
dc.rights	au.edu.uts.lib/cph
dc.title	Differential-Fed Dual-Polarized Antenna Decoupling Techniques for in-Band Full-Duplex	en_US.UTF-8
dc.type	Thesis
utslib.copyright.status	open_access	*

Abstract:

The increasing number of wireless devices has resulted in a growing problem of spectrum congestion. In-band full-duplex (IBFD), which allows for simultaneous transmission (TX) and reception (RX) of signals in the same frequency band, is a promising solution to this issue. However, IBFD is challenging because of the significant self-interference (SI) between TX and RX channels. Self-interference cancellation (SIC) techniques provide an effective solution to SI suppression. In this dissertation, several novel SIC/decoupling techniques are proposed, which can be classified into two types. The first type pertains to dual-polarized four-port IBFD antennas, which encompass four channels, each supporting two orthogonal polarizations for both TX and RX. After that, to further improve the space utilization efficiency, a four-port IBFD antenna system with shared-aperture is developed based on a novel common-mode (CM) / differentialmode (DM) combination method. In the first type, the primary emphasis is placed on the feeding network of the antenna system, while the decoupling methods between antenna elements remain relatively normal and occupies additional space. To solve the inner coupling between antenna elements, the second type of decoupling techniques are proposed for extremely closely spaced IBFD antennas, which become imperative in applications where space is limited, such as in mobile devices and portable terminals. This dissertation introduces the differential symmetrical decoupling network (DSDN), a novel method specifically designed to decouple differential-fed antennas (DFAs) while preserving their structural symmetry. Additionally, a novel and systematic approach is introduced, referred to as the S-parameter consistency method, to address the challenges of decoupling dual-polarized patch antennas with extremely small spacing. As the necessity of full-duplex antennas lies in their ability to significantly improve data throughput, reduce latency, maximize spectrum efficiency, increase network capacity, and enhance reliability, the proposed SIC/decoupling techniques are indispensable for enabling IBFD antennas in modern wireless communication systems and networks.

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http://hdl.handle.net/10453/181099