$Log periodic fractal KOCH antenna for wireless applications$

Log periodic fractal KOCH antenna for wireless applications

In wireless communication system, antenna is one of the important devices to allow two ways communications. At lower frequency bands, the antenna size is bigger compared to the higher frequency band. Various techniques have been used in reducing the antenna size such as fractal technique and higher...

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Main Author:	A. Karim, Mohd. Nazri
Format:	Thesis
Language:	English
Published:	2010
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/11588/6/MohdNazriKarimMFKE2010.pdf
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id	my-utm-ep.11588
record_format	uketd_dc
spelling	my-utm-ep.115882017-09-26T07:17:37Z Log periodic fractal KOCH antenna for wireless applications 2010-03 A. Karim, Mohd. Nazri TK Electrical engineering. Electronics Nuclear engineering In wireless communication system, antenna is one of the important devices to allow two ways communications. At lower frequency bands, the antenna size is bigger compared to the higher frequency band. Various techniques have been used in reducing the antenna size such as fractal technique and higher dielectric constant while maintaining the performance of the antenna. In this work, the fractal Koch geometry has been used as a method to reduce the size of the developed antennas. This is based on the advantages that are inherent for fractal Koch geometry in reducing the size and maintaining the performances. The design of the antenna begins with the understanding of the basic antenna properties such as return loss, radiation pattern including the understanding of the Koch geometry. A number of designs has been developed such as zero, first, second (0th, 1st, 2nd) and series iteration which are targeted for wideband and Ultra High Frequency (UHF). The simulation work is done using Computer Simulation Technology (CST 2008) software. About 27 % reduction of the antenna size has been achieved by using fractal Koch technique. The designs obtained from simulation are fabricated on FR4 board using wet etching technique. The results from simulation and measurement have been compared and analyzed. The antennas show good return loss lower than -10 dB at the desired frequency, directional radiation patterns with beamwidth of 110 degree, wide bandwidth up to 200 %, and gain between 5 dBi and 8 dBi. 2010-03 Thesis http://eprints.utm.my/id/eprint/11588/ http://eprints.utm.my/id/eprint/11588/6/MohdNazriKarimMFKE2010.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 A. Karim, Mohd. Nazri Log periodic fractal KOCH antenna for wireless applications
description	In wireless communication system, antenna is one of the important devices to allow two ways communications. At lower frequency bands, the antenna size is bigger compared to the higher frequency band. Various techniques have been used in reducing the antenna size such as fractal technique and higher dielectric constant while maintaining the performance of the antenna. In this work, the fractal Koch geometry has been used as a method to reduce the size of the developed antennas. This is based on the advantages that are inherent for fractal Koch geometry in reducing the size and maintaining the performances. The design of the antenna begins with the understanding of the basic antenna properties such as return loss, radiation pattern including the understanding of the Koch geometry. A number of designs has been developed such as zero, first, second (0th, 1st, 2nd) and series iteration which are targeted for wideband and Ultra High Frequency (UHF). The simulation work is done using Computer Simulation Technology (CST 2008) software. About 27 % reduction of the antenna size has been achieved by using fractal Koch technique. The designs obtained from simulation are fabricated on FR4 board using wet etching technique. The results from simulation and measurement have been compared and analyzed. The antennas show good return loss lower than -10 dB at the desired frequency, directional radiation patterns with beamwidth of 110 degree, wide bandwidth up to 200 %, and gain between 5 dBi and 8 dBi.
format	Thesis
qualification_level	Master's degree
author	A. Karim, Mohd. Nazri
author_facet	A. Karim, Mohd. Nazri
author_sort	A. Karim, Mohd. Nazri
title	Log periodic fractal KOCH antenna for wireless applications
title_short	Log periodic fractal KOCH antenna for wireless applications
title_full	Log periodic fractal KOCH antenna for wireless applications
title_fullStr	Log periodic fractal KOCH antenna for wireless applications
title_full_unstemmed	Log periodic fractal KOCH antenna for wireless applications
title_sort	log periodic fractal koch antenna for wireless applications
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2010
url	http://eprints.utm.my/id/eprint/11588/6/MohdNazriKarimMFKE2010.pdf
_version_	1747814874842398720

Log periodic fractal KOCH antenna for wireless applications

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