Embroidery leaf-shaped dipole antenna for wearable communication system

The fast development of technology and the demand of mobile wireless communication have increased due to the advancement of wearable devices. Industries are continuing to search for devices that are compact, robust, portable, unobtrusive, cost-effective and easy to use. The feature of fabric antenna...

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Main Author:	Ramly, Nurul Jannah
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/102315/1/NurulJannahRamlyMSKE2018.pdf.pdf
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id	my-utm-ep.102315
record_format	uketd_dc
spelling	my-utm-ep.1023152023-08-17T01:08:57Z Embroidery leaf-shaped dipole antenna for wearable communication system 2018 Ramly, Nurul Jannah TK Electrical engineering. Electronics Nuclear engineering The fast development of technology and the demand of mobile wireless communication have increased due to the advancement of wearable devices. Industries are continuing to search for devices that are compact, robust, portable, unobtrusive, cost-effective and easy to use. The feature of fabric antenna technology is responding well to the current trend towards wearable and flexibility materials due to its flexibility and convenient to users. Therefore, this thesis focuses on designing and analysing the type of embroidery antenna using conductive threads. Embroidery is usually used in the clothing industry to incorporate complex patterns into garments. A leaf-shaped dipole textile antenna at Industrial, Scientific and Medical (ISM) band is chosen to be further investigated. The proposed dipole antenna is designed to operate at 2.45 GHz. The effect of conductive threads with three different types of stitching is analysed. The first type of stitching leaf-shaped dipole antenna is circular followed by vertical and horizontal stitch respectively. These three types of embroidery antenna are investigated in terms of bending, crumpling and wetness. From the return loss measurement, the antenna bandwidth with circular stitch shows better performance with optimum resonances compared to the vertical and horizontal stitching. The bandwidth of circular stitching for bending and crumpling investigation process shows 25% and 40% improved performance respectively. In wetness investigation, the presence of water has modified the properties of the substrate yields change in the operating frequency. The antenna performance after the wetness is not as similar to the earlier state (before wetness experiment) due to the shrinking effect and slight property changes on the fabric material. The measured results confirm that the circular stitch is more suitable for leaf-shaped dipole antenna design. Thus, it can be concluded that different stitches give different results for leaf-shaped dipole antenna. These results are in good agreement to the previous work where stitching types are important aspect to be taken into account to ensure good antenna performances. 2018 Thesis http://eprints.utm.my/id/eprint/102315/ http://eprints.utm.my/id/eprint/102315/1/NurulJannahRamlyMSKE2018.pdf.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:145032 masters Universiti Teknologi Malaysia Faculty of Engineering - School 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 Ramly, Nurul Jannah Embroidery leaf-shaped dipole antenna for wearable communication system
description	The fast development of technology and the demand of mobile wireless communication have increased due to the advancement of wearable devices. Industries are continuing to search for devices that are compact, robust, portable, unobtrusive, cost-effective and easy to use. The feature of fabric antenna technology is responding well to the current trend towards wearable and flexibility materials due to its flexibility and convenient to users. Therefore, this thesis focuses on designing and analysing the type of embroidery antenna using conductive threads. Embroidery is usually used in the clothing industry to incorporate complex patterns into garments. A leaf-shaped dipole textile antenna at Industrial, Scientific and Medical (ISM) band is chosen to be further investigated. The proposed dipole antenna is designed to operate at 2.45 GHz. The effect of conductive threads with three different types of stitching is analysed. The first type of stitching leaf-shaped dipole antenna is circular followed by vertical and horizontal stitch respectively. These three types of embroidery antenna are investigated in terms of bending, crumpling and wetness. From the return loss measurement, the antenna bandwidth with circular stitch shows better performance with optimum resonances compared to the vertical and horizontal stitching. The bandwidth of circular stitching for bending and crumpling investigation process shows 25% and 40% improved performance respectively. In wetness investigation, the presence of water has modified the properties of the substrate yields change in the operating frequency. The antenna performance after the wetness is not as similar to the earlier state (before wetness experiment) due to the shrinking effect and slight property changes on the fabric material. The measured results confirm that the circular stitch is more suitable for leaf-shaped dipole antenna design. Thus, it can be concluded that different stitches give different results for leaf-shaped dipole antenna. These results are in good agreement to the previous work where stitching types are important aspect to be taken into account to ensure good antenna performances.
format	Thesis
qualification_level	Master's degree
author	Ramly, Nurul Jannah
author_facet	Ramly, Nurul Jannah
author_sort	Ramly, Nurul Jannah
title	Embroidery leaf-shaped dipole antenna for wearable communication system
title_short	Embroidery leaf-shaped dipole antenna for wearable communication system
title_full	Embroidery leaf-shaped dipole antenna for wearable communication system
title_fullStr	Embroidery leaf-shaped dipole antenna for wearable communication system
title_full_unstemmed	Embroidery leaf-shaped dipole antenna for wearable communication system
title_sort	embroidery leaf-shaped dipole antenna for wearable communication system
granting_institution	Universiti Teknologi Malaysia
granting_department	Faculty of Engineering - School of Electrical Engineering
publishDate	2018
url	http://eprints.utm.my/id/eprint/102315/1/NurulJannahRamlyMSKE2018.pdf.pdf
_version_	1776100894090199040

Embroidery leaf-shaped dipole antenna for wearable communication system

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