Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface

Nowadays, with the fast development in wireless devices, a wireless communication system such as Wireless Local Area Network (WLAN) application has been widely developed to pave the way for the so-called anywhere, anytime communication. In recent years, an antenna with a small size and large bandwid...

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Main Author:	Abu Bakar, Hamizan
Format:	Thesis
Language:	English English
Published:	2019
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/24613/1/Design%20Of%20New%20Inverted%20Suspended%20Circular%20Polarized%20Antenna%20With%20Metasurface.pdf http://eprints.utem.edu.my/id/eprint/24613/2/Design%20Of%20New%20Inverted%20Suspended%20Circular%20Polarized%20Antenna%20With%20Metasurface.pdf
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id	my-utem-ep.24613
record_format	uketd_dc
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Abd. Aziz, Mohamad Zoinol Abidin
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Abu Bakar, Hamizan Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface
description	Nowadays, with the fast development in wireless devices, a wireless communication system such as Wireless Local Area Network (WLAN) application has been widely developed to pave the way for the so-called anywhere, anytime communication. In recent years, an antenna with a small size and large bandwidth has received much attention. As mobile devices are using ever-bigger portions of available bandwidth; wireless providers are in search of new and better ways to boost capacity on their system. Thus, a circularly polarized antenna with small size and wide bandwidth that can operate at WLAN application operating frequency was demanded. Circularly polarized antennas can reduce the unavoided multipath interference, provide better mobility, weather penetration and flexibility in orientation angle. However, the conventional circularly polarized microstrip antenna has narrowband characteristics and more significant in size. Due to this deficiency, L-probe technique and integration of metasurface structure technique was introduced to provide miniaturization requirement and enhancement in antenna parameter performance such as bandwidth and gain. Therefore, the objective of this project was to design, simulate, fabricate and measure the design of new inverted suspended circular polarized antenna with metasurface for WLAN application at 2.4 GHz. In this project, the antennas were designed by using an inverted suspended L-probe technique with separation of air gap layer. Modified L-probe fed was used for the antenna design where the feed line was printed either at the upper or at the bottom side of the FR4 substrate. First, circular polarized rectangular patch antenna Design A (90 x 90 mm) was designed. Then, the circular polarized circular patch antenna (Design B1, B2, B3, and B4) with miniaturization up to 20.91 % (80 x 80 mm) by comparing to Design A were designed. Lastly, the most suitable of optimized metasurface structure design (Design C1) was chosen to be combined with antenna Design B4. The optimized metasurface antenna (Design BC1d) provides miniaturization, better reflection coefficient, larger bandwidth and maintaining a circular polarization property. The fabrication process is carried out using a low-cost 4.4 permittivity FR-4 substrate. Based on the simulation and measurement result, the designed metasurface antenna Design BC1d covered a frequency of 2.4 GHz with more than 450 MHz bandwidth. Other than that, the proposed metasurface antenna has the advantages of reduction in patch size up to 45.24 % and miniaturization of the antenna substrate up to 23.44 % (70 x 70 mm). Moreover, the axial ratio bandwidth (ARBW) of the metasurface antenna is up to 18.6 %. Overall, another antenna parameter such as total efficiency, directivity and realized gain of the metasurface antenna also showed good responses. Therefore, this miniaturized metasurface antenna is capable of performing circular polarization and offer wide bandwidth which is a suitable candidate to be applied for WLAN application.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Abu Bakar, Hamizan
author_facet	Abu Bakar, Hamizan
author_sort	Abu Bakar, Hamizan
title	Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface
title_short	Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface
title_full	Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface
title_fullStr	Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface
title_full_unstemmed	Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface
title_sort	design of new inverted suspended circular polarized antenna with metasurface
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Electronic and Computer Engineering
publishDate	2019
url	http://eprints.utem.edu.my/id/eprint/24613/1/Design%20Of%20New%20Inverted%20Suspended%20Circular%20Polarized%20Antenna%20With%20Metasurface.pdf http://eprints.utem.edu.my/id/eprint/24613/2/Design%20Of%20New%20Inverted%20Suspended%20Circular%20Polarized%20Antenna%20With%20Metasurface.pdf
_version_	1747834077713530880
spelling	my-utem-ep.246132021-10-05T11:35:28Z Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface 2019 Abu Bakar, Hamizan T Technology (General) TK Electrical engineering. Electronics Nuclear engineering Nowadays, with the fast development in wireless devices, a wireless communication system such as Wireless Local Area Network (WLAN) application has been widely developed to pave the way for the so-called anywhere, anytime communication. In recent years, an antenna with a small size and large bandwidth has received much attention. As mobile devices are using ever-bigger portions of available bandwidth; wireless providers are in search of new and better ways to boost capacity on their system. Thus, a circularly polarized antenna with small size and wide bandwidth that can operate at WLAN application operating frequency was demanded. Circularly polarized antennas can reduce the unavoided multipath interference, provide better mobility, weather penetration and flexibility in orientation angle. However, the conventional circularly polarized microstrip antenna has narrowband characteristics and more significant in size. Due to this deficiency, L-probe technique and integration of metasurface structure technique was introduced to provide miniaturization requirement and enhancement in antenna parameter performance such as bandwidth and gain. Therefore, the objective of this project was to design, simulate, fabricate and measure the design of new inverted suspended circular polarized antenna with metasurface for WLAN application at 2.4 GHz. In this project, the antennas were designed by using an inverted suspended L-probe technique with separation of air gap layer. Modified L-probe fed was used for the antenna design where the feed line was printed either at the upper or at the bottom side of the FR4 substrate. First, circular polarized rectangular patch antenna Design A (90 x 90 mm) was designed. Then, the circular polarized circular patch antenna (Design B1, B2, B3, and B4) with miniaturization up to 20.91 % (80 x 80 mm) by comparing to Design A were designed. Lastly, the most suitable of optimized metasurface structure design (Design C1) was chosen to be combined with antenna Design B4. The optimized metasurface antenna (Design BC1d) provides miniaturization, better reflection coefficient, larger bandwidth and maintaining a circular polarization property. The fabrication process is carried out using a low-cost 4.4 permittivity FR-4 substrate. Based on the simulation and measurement result, the designed metasurface antenna Design BC1d covered a frequency of 2.4 GHz with more than 450 MHz bandwidth. Other than that, the proposed metasurface antenna has the advantages of reduction in patch size up to 45.24 % and miniaturization of the antenna substrate up to 23.44 % (70 x 70 mm). Moreover, the axial ratio bandwidth (ARBW) of the metasurface antenna is up to 18.6 %. Overall, another antenna parameter such as total efficiency, directivity and realized gain of the metasurface antenna also showed good responses. Therefore, this miniaturized metasurface antenna is capable of performing circular polarization and offer wide bandwidth which is a suitable candidate to be applied for WLAN application. 2019 Thesis http://eprints.utem.edu.my/id/eprint/24613/ http://eprints.utem.edu.my/id/eprint/24613/1/Design%20Of%20New%20Inverted%20Suspended%20Circular%20Polarized%20Antenna%20With%20Metasurface.pdf text en public http://eprints.utem.edu.my/id/eprint/24613/2/Design%20Of%20New%20Inverted%20Suspended%20Circular%20Polarized%20Antenna%20With%20Metasurface.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=117067 mphil masters Universiti Teknikal Malaysia Melaka Faculty of Electronic and Computer Engineering Abd. 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Design Of New Inverted Suspended Circular Polarized Antenna With Metasurface

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