Planar fractal dipole antenna for the UHF band

Planar fractal dipole antenna for the UHF band

The Ultra High Frequency (UHF) band has long been used for voice,data and video communication. The lower frequency band of the UHF which is the 470 – 890 MHz is used for terrestrial TV broadcast. The conventional UHF antennas for receiving TV signals are quite large and directional. It would be be...

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Main Author: Mohammad Irfan, Mohammad Irfan
Format: Thesis
Language:English
Published: 2007
Subjects:
TK Electrical engineering
Electronics Nuclear engineering
HE Transportation and Communications
Online Access:http://eprints.utm.my/id/eprint/6113/1/MohammadIrfanMFKE2007.pdf
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spelling my-utm-ep.61132018-08-26T04:43:14Z Planar fractal dipole antenna for the UHF band 2007-05 Mohammad Irfan, Mohammad Irfan TK Electrical engineering. Electronics Nuclear engineering HE Transportation and Communications The Ultra High Frequency (UHF) band has long been used for voice,data and video communication. The lower frequency band of the UHF which is the 470 – 890 MHz is used for terrestrial TV broadcast. The conventional UHF antennas for receiving TV signals are quite large and directional. It would be better to have a compact and omnidirectional antenna that can be easily fabricated, especially for portable devices such as portable televisions. Koch curve fractal structure is one of the fractal geometries used in antenna designs. One of the benefits of using fractals in the design of antenna structure includes miniaturization. The dipole antenna is one of the omnidirectional that can be easily designed. The planar type of antenna is one of the easiest to fabricate. This project report describes the design of the planar fractal antenna for the UHF band using the Koch curve structure. Different shapes of antenna using the truncated ground plane have been designed and simulated to investigate which is the one that gives the best performance. The simulation process was done using the Agilent ADS software. The antenna has been fabricated on the FR4 microstrip board with r e = 4.6 and thickness of 1.6 mm using the photolitography and wet etching technique. The simulation result shows that the Koch curve can be used to minimize the length of the dipole. It also shows that the folded dipole configuration together with using Koch curve can increase bandwidth and minimize the length of the antenna. The bandwidth achieved for this antenna based on simulation is 5% and based on measurement is 7% which is quite small compared to the 470-890 MHz band but adequate to receive channel 57-62 UHF. The radiation patterns shows the characteristic of a dipole which is omnidirectional. 2007-05 Thesis http://eprints.utm.my/id/eprint/6113/ http://eprints.utm.my/id/eprint/6113/1/MohammadIrfanMFKE2007.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:62029 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
HE Transportation and Communications
spellingShingle TK Electrical engineering
Electronics Nuclear engineering
HE Transportation and Communications
Mohammad Irfan, Mohammad Irfan
Planar fractal dipole antenna for the UHF band
description The Ultra High Frequency (UHF) band has long been used for voice,data and video communication. The lower frequency band of the UHF which is the 470 – 890 MHz is used for terrestrial TV broadcast. The conventional UHF antennas for receiving TV signals are quite large and directional. It would be better to have a compact and omnidirectional antenna that can be easily fabricated, especially for portable devices such as portable televisions. Koch curve fractal structure is one of the fractal geometries used in antenna designs. One of the benefits of using fractals in the design of antenna structure includes miniaturization. The dipole antenna is one of the omnidirectional that can be easily designed. The planar type of antenna is one of the easiest to fabricate. This project report describes the design of the planar fractal antenna for the UHF band using the Koch curve structure. Different shapes of antenna using the truncated ground plane have been designed and simulated to investigate which is the one that gives the best performance. The simulation process was done using the Agilent ADS software. The antenna has been fabricated on the FR4 microstrip board with r e = 4.6 and thickness of 1.6 mm using the photolitography and wet etching technique. The simulation result shows that the Koch curve can be used to minimize the length of the dipole. It also shows that the folded dipole configuration together with using Koch curve can increase bandwidth and minimize the length of the antenna. The bandwidth achieved for this antenna based on simulation is 5% and based on measurement is 7% which is quite small compared to the 470-890 MHz band but adequate to receive channel 57-62 UHF. The radiation patterns shows the characteristic of a dipole which is omnidirectional.
format Thesis
qualification_level Master's degree
author Mohammad Irfan, Mohammad Irfan
author_facet Mohammad Irfan, Mohammad Irfan
author_sort Mohammad Irfan, Mohammad Irfan
title Planar fractal dipole antenna for the UHF band
title_short Planar fractal dipole antenna for the UHF band
title_full Planar fractal dipole antenna for the UHF band
title_fullStr Planar fractal dipole antenna for the UHF band
title_full_unstemmed Planar fractal dipole antenna for the UHF band
title_sort planar fractal dipole antenna for the uhf band
granting_institution Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department Faculty of Electrical Engineering
publishDate 2007
url http://eprints.utm.my/id/eprint/6113/1/MohammadIrfanMFKE2007.pdf
_version_ 1747814628868489216

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