Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication

Mobile communication has become prevalent nowadays. The demand for high speed data and information exchange urge on a better communication services. Furthermore, existing services may not able to satisfy the increasing data volume with increasing number of users. The current technology may suffer fr...

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Main Author:	Zhang, Bei Bei
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/79601/1/ZhangBeiBeiPFKE2018.pdf
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id	my-utm-ep.79601
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spelling	my-utm-ep.796012018-10-31T13:01:06Z Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication 2018 Zhang, Bei Bei TK Electrical engineering. Electronics Nuclear engineering Mobile communication has become prevalent nowadays. The demand for high speed data and information exchange urge on a better communication services. Furthermore, existing services may not able to satisfy the increasing data volume with increasing number of users. The current technology may suffer from congestion and spectrum shortage issue. Thus, 5G is introduced with new spectrum particularly at higher frequencies. However, at high frequencies, a higher propagation loss is expected. The solution is to have a high gain array antenna with particular beamforming features to compensate the high loss. Thus, this work proposes a Butler Matrix beamforming circuit to feed an array at particular 28 GHz for 5G mobile communication. However, the antenna part will not be in the scope of this work. The beamforming circuit will be design, simulate and optimize using CST software. The components namely the coupler, crossover and phase shifter are designed and analyzed separately before integrated to be one Butler Matrix network circuit. Conventional hybrid coupler is designed to operate at desired 28GHz with 90 degrees phase different and equal power divided between the output ports before it is improved with tee junction structure, which reduce the overall dimension without much sacrificing the performances. The coupler then combined to form a crossover with 0 degrees phase different and good isolation. A delay line which give 45 degrees phase shift is designed and connect the structure to form a Butler Matrix beamforming circuit. 2018 Thesis http://eprints.utm.my/id/eprint/79601/ http://eprints.utm.my/id/eprint/79601/1/ZhangBeiBeiPFKE2018.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Zhang, Bei Bei Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication
description	Mobile communication has become prevalent nowadays. The demand for high speed data and information exchange urge on a better communication services. Furthermore, existing services may not able to satisfy the increasing data volume with increasing number of users. The current technology may suffer from congestion and spectrum shortage issue. Thus, 5G is introduced with new spectrum particularly at higher frequencies. However, at high frequencies, a higher propagation loss is expected. The solution is to have a high gain array antenna with particular beamforming features to compensate the high loss. Thus, this work proposes a Butler Matrix beamforming circuit to feed an array at particular 28 GHz for 5G mobile communication. However, the antenna part will not be in the scope of this work. The beamforming circuit will be design, simulate and optimize using CST software. The components namely the coupler, crossover and phase shifter are designed and analyzed separately before integrated to be one Butler Matrix network circuit. Conventional hybrid coupler is designed to operate at desired 28GHz with 90 degrees phase different and equal power divided between the output ports before it is improved with tee junction structure, which reduce the overall dimension without much sacrificing the performances. The coupler then combined to form a crossover with 0 degrees phase different and good isolation. A delay line which give 45 degrees phase shift is designed and connect the structure to form a Butler Matrix beamforming circuit.
format	Thesis
qualification_level	Master's degree
author	Zhang, Bei Bei
author_facet	Zhang, Bei Bei
author_sort	Zhang, Bei Bei
title	Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication
title_short	Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication
title_full	Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication
title_fullStr	Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication
title_full_unstemmed	Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication
title_sort	design of a butler matrix beamforming circuit at 28 ghz for 5g mobile communication
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2018
url	http://eprints.utm.my/id/eprint/79601/1/ZhangBeiBeiPFKE2018.pdf
_version_	1747818266299990016

Design of a butler matrix beamforming circuit at 28 GHZ for 5G mobile communication

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