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Design and development of wearable fluidic antenna with AMC

Master of Science in Communication Engineering

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Bibliographic Details
Main Author: Mohammad Nazrin, Ramli
Other Authors: Soh, Ping Jack, Assoc. Prof. Dr.
Format: Thesis
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2018
Subjects:
Wearable technology > Antennas
Electromagnetic fields
Antenna radiation patterns > Computer simulation
Human physiology
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/76736
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spelling my.unimap-767362022-11-08T03:03:17Z Design and development of wearable fluidic antenna with AMC Mohammad Nazrin, Ramli Soh, Ping Jack, Assoc. Prof. Dr. Wearable technology -- Antennas Electromagnetic fields Antenna radiation patterns -- Computer simulation Human physiology Master of Science in Communication Engineering In recent years, most wearable antennas are used for emergency and rescue services, tracking purposes, military applications and monitoring human physiological parameters. Design of antennas for wearable applications is challenging due to their operation in the vicinity of human body which causes interference, thus affecting the overall performance. The main reason is because human body absorbs electromagnetic waves emitted from antennas, which leads to the reduction of antenna efficiency when they are placed near to the body. Besides, their electromagnetic (EM) radiation are possibly harmful to human health in the long term when exposed excessively. The objective of this project is to design, develop and fabricate wearable fluidic antennas with low Specific Absorption Rates (SAR) and good resistance to water and moisture. To reduce the impact of the user on the antenna and provide a safe emission level, Artificial Magnetic Conductor (AMC) is a suitable solution. They are typically designed to filter and reflect possible EM wave propagating at predefined sets of frequencies towards a certain direction. A flexible wearable fluidic antenna embedded in a polydimethylsiloxane (PDMS) structure integrated with a liquid metal AMC plane is presented. The antenna is designed based on the operating principles of a patch antenna with slots and slits to cover its operation in the 2.45 GHz and 5.8 GHz wireless communication bands. The first design, denoted as Antenna Design 1 (AD1) is implemented on a PDMS substrate, its AMC is formed using copper sheet, and its radiator using liquid metal Eutectic Gallium Indium (EGaIn). AD1 achieved a gain of 3.58 dB at 2.45 GHz with a bandwidth of 85 MHz, and 6.08 dB at 5.8 GHz with a bandwidth of 278 MHz. For SAR, all planar and bent conditions of AD1 did not exceed 2 W/kg based on the European regulatory requirement. The second design, denoted as Antenna Design 2 (AD2) was designed to improve the drawbacks of AD1, using PDMS as its substrate and Galinstan as the conducting elements of both the AMC and radiator. The main innovation of this work is the integration of an antenna and AMC plane fully made using liquid metal embedded into PDMS to enable a highly flexible and robust antenna, besides potentially adding tunable feature to the structure in the near future. AD2 showed a bandwidth of 80 MHz and 460 MHz in the lower band and upper band, respectively, with gains of between 5.2 and 4.12 dB. In terms of SAR, all planar and bent conditions for AD2 did not result in SAR exceeding 2 W/kg, indicating its safe use as wearable antenna. Finally, experimental validated has indicated that the fluidic antenna is improved in terms of resistance to water compared to textile antennas. 2018 2022-11-08T03:03:17Z 2022-11-08T03:03:17Z Thesis http://dspace.unimap.edu.my:80/xmlui/handle/123456789/76736 en Universiti Malaysia Perlis (UniMAP) Universiti Malaysia Perlis (UniMAP) School of Computer and Communication Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Wearable technology -- Antennas
Electromagnetic fields
Antenna radiation patterns -- Computer simulation
Human physiology
spellingShingle Wearable technology -- Antennas
Electromagnetic fields
Antenna radiation patterns -- Computer simulation
Human physiology
Mohammad Nazrin, Ramli
Design and development of wearable fluidic antenna with AMC
description Master of Science in Communication Engineering
author2 Soh, Ping Jack, Assoc. Prof. Dr.
author_facet Soh, Ping Jack, Assoc. Prof. Dr.
Mohammad Nazrin, Ramli
format Thesis
author Mohammad Nazrin, Ramli
author_sort Mohammad Nazrin, Ramli
title Design and development of wearable fluidic antenna with AMC
title_short Design and development of wearable fluidic antenna with AMC
title_full Design and development of wearable fluidic antenna with AMC
title_fullStr Design and development of wearable fluidic antenna with AMC
title_full_unstemmed Design and development of wearable fluidic antenna with AMC
title_sort design and development of wearable fluidic antenna with amc
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2018
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/76736
_version_ 1751537965056655360
score 13.222552

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