High Density Multiband Multi-Array Technologies for 5G Communication Antenna Systems

Farasat, Madiha

High Density Multiband Multi-Array Technologies for 5G Communication Antenna Systems

Farasat, Madiha

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Publication Type:: Thesis
Issue Date:: 2024

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Field	Value	Language
dc.contributor.author	Farasat, Madiha
dc.date.accessioned	2024-06-20T04:14:05Z
dc.date.available	2024-06-20T04:14:05Z
dc.date.issued	2024
dc.identifier.uri	http://hdl.handle.net/10453/179592
dc.description	University of Technology Sydney. Faculty of Engineering and Information Technology.	en_US.UTF-8
dc.description.abstract	A number of distinct concerns are driving the switch to multiband technologies for 5G communication, including the requirement for increased network capacity, the ability to handle a wide range of diverse use cases applications, and the opportunity to improve network performance. Multi-band and multi-beam arrays are good options, but they impose extra demands on the antennas. For instance, high performance antenna elements are necessary, however, cross-band scattering, a long-standing concern in multi-band antenna arrays, must be eliminated in order to preserve antenna system performance and stability. Secondly, wide operational bandwidth and consistent patterns with low side-lobe levels are sought for multi-band antenna arrays. All of these things are challenging to achieve. This thesis tackles the aforementioned issues by making four major contributions. The first contribution is a detailed review article of base station antenna (BSA) technologies. The goal of this communication is to present a complete overview of recent BSA antenna designs and challenges, with a focus on lower microwave bands in the sub-6 GHz area. While there is a substantial amount of published work on BSAs, there is no unified discussion of BSA evolution with mobile technology. As a result, a brief overview of how BSA technologies have developed across mobile generations will benefit the antenna community. The second contribution is the creation of novel methodology of HV dipoles (Horizontal vertical dipoles) for reducing cross-band interference in multi-band BSA arrays. The experimental results show that cross-band scattering is reduced and that both arrays exhibit stable radiation patterns over a wide range of operational bandwidths. The strategies proposed for controlling cross-band scattering ensure the coexistence of antennas for diverse services and promote communication standard development. The third contribution is the development of a distinctive approach for common mode resonance suppression through filtering circuitry which helps to reduce the common mode resonance in multi-band BSA arrays. The experimental results verify the novel prototype and its significance. Hence, the proposed technique can be implemented for a wide range of multiband antenna where radiating elements are interspersed on same ground plane to supress pattern distortion. The fourth contribution is the development of a compact antenna system as per modern day antenna requirements. There hasn't been much research conducted on how to maximise the directivity of wideband multiband antennas while catering size restrictions. The proposed designs can be utilised to boost system capacity in a variety of cellular base stations.	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/10453/179592/1/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 Madiha Farasat
dc.rights	au.edu.uts.lib/nph
dc.title	High Density Multiband Multi-Array Technologies for 5G Communication Antenna Systems	en_US.UTF-8
dc.type	Thesis
utslib.copyright.status	open_access	*

Abstract:

A number of distinct concerns are driving the switch to multiband technologies for 5G communication, including the requirement for increased network capacity, the ability to handle a wide range of diverse use cases applications, and the opportunity to improve network performance. Multi-band and multi-beam arrays are good options, but they impose extra demands on the antennas. For instance, high performance antenna elements are necessary, however, cross-band scattering, a long-standing concern in multi-band antenna arrays, must be eliminated in order to preserve antenna system performance and stability. Secondly, wide operational bandwidth and consistent patterns with low side-lobe levels are sought for multi-band antenna arrays. All of these things are challenging to achieve. This thesis tackles the aforementioned issues by making four major contributions. The first contribution is a detailed review article of base station antenna (BSA) technologies. The goal of this communication is to present a complete overview of recent BSA antenna designs and challenges, with a focus on lower microwave bands in the sub-6 GHz area. While there is a substantial amount of published work on BSAs, there is no unified discussion of BSA evolution with mobile technology. As a result, a brief overview of how BSA technologies have developed across mobile generations will benefit the antenna community. The second contribution is the creation of novel methodology of HV dipoles (Horizontal vertical dipoles) for reducing cross-band interference in multi-band BSA arrays. The experimental results show that cross-band scattering is reduced and that both arrays exhibit stable radiation patterns over a wide range of operational bandwidths. The strategies proposed for controlling cross-band scattering ensure the coexistence of antennas for diverse services and promote communication standard development. The third contribution is the development of a distinctive approach for common mode resonance suppression through filtering circuitry which helps to reduce the common mode resonance in multi-band BSA arrays. The experimental results verify the novel prototype and its significance. Hence, the proposed technique can be implemented for a wide range of multiband antenna where radiating elements are interspersed on same ground plane to supress pattern distortion. The fourth contribution is the development of a compact antenna system as per modern day antenna requirements. There hasn't been much research conducted on how to maximise the directivity of wideband multiband antennas while catering size restrictions. The proposed designs can be utilised to boost system capacity in a variety of cellular base stations.

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