Design and development of antenna for ultra wideband applications

A few years after the early investigation on Ultra WideBand (UWB) wireless system, considerable research efforts have been put into the design of UWB antennas and systems for communications. These UWB antennas are essential for providing wireless wideband communications based on the use of very narr...

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Main Author:	Yusnita Rahayu, Yusnita Rahayu
Format:	Thesis
Language:	English
Published:	2008
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/18717/1/YusnitaRahayuPFKE2008.pdf
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id	my-utm-ep.18717
record_format	uketd_dc
spelling	my-utm-ep.187172018-08-26T04:53:09Z Design and development of antenna for ultra wideband applications 2008 Yusnita Rahayu, Yusnita Rahayu TK Electrical engineering. Electronics Nuclear engineering A few years after the early investigation on Ultra WideBand (UWB) wireless system, considerable research efforts have been put into the design of UWB antennas and systems for communications. These UWB antennas are essential for providing wireless wideband communications based on the use of very narrow pulses on the order of nanoseconds, covering a very wide bandwidth in the frequency domain, and over very short distances at very low power densities. In this thesis, new models of T-, L- and U-slotted UWB antennas are proposed by studying their current distribution characteristics. The wideband behavior is due to the currents along the slots’ edges introducing an additional resonance, which, in conjunction with the resonance of the antennas main patch. Thus, the resonances overlapping have produced an overall broadband frequency response characteristic. These antennas are considerable smaller than others listed in the references, in which their sizes are less than a wavelength, compact, and suitable for many UWB applications. The configuration of slots type for both patches and feeding strip are considered as a novelty and contribution in this thesis. The geometry of the antenna implies the current courses and makes it possible to identify active and neutral zones in the antenna, thus it will be possible to fix which elements will act on each characteristic. This thesis also investigated the ability of slotted UWB antennas to reject the interference from licensed Fixed Wireless Access (FWA), High PERformance Local Area Network (HIPERLAN) and Wireless Local Area Network (WLAN) within the same propagation environment. Inserting a half-wavelength slot structure with additional small patches gap attached have resulted frequency notched band characteristics. The small patches gap instead of switching that will be used to shortened and lengthen the slot length. The measured return loss, radiation patterns, and phase have good agreement with the simulated results. The antenna provides an omnidirectional pattern with the return loss less than -10 dB and linear in phase. 2008 Thesis http://eprints.utm.my/id/eprint/18717/ http://eprints.utm.my/id/eprint/18717/1/YusnitaRahayuPFKE2008.pdf application/pdf en public phd doctoral 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 Yusnita Rahayu, Yusnita Rahayu Design and development of antenna for ultra wideband applications
description	A few years after the early investigation on Ultra WideBand (UWB) wireless system, considerable research efforts have been put into the design of UWB antennas and systems for communications. These UWB antennas are essential for providing wireless wideband communications based on the use of very narrow pulses on the order of nanoseconds, covering a very wide bandwidth in the frequency domain, and over very short distances at very low power densities. In this thesis, new models of T-, L- and U-slotted UWB antennas are proposed by studying their current distribution characteristics. The wideband behavior is due to the currents along the slots’ edges introducing an additional resonance, which, in conjunction with the resonance of the antennas main patch. Thus, the resonances overlapping have produced an overall broadband frequency response characteristic. These antennas are considerable smaller than others listed in the references, in which their sizes are less than a wavelength, compact, and suitable for many UWB applications. The configuration of slots type for both patches and feeding strip are considered as a novelty and contribution in this thesis. The geometry of the antenna implies the current courses and makes it possible to identify active and neutral zones in the antenna, thus it will be possible to fix which elements will act on each characteristic. This thesis also investigated the ability of slotted UWB antennas to reject the interference from licensed Fixed Wireless Access (FWA), High PERformance Local Area Network (HIPERLAN) and Wireless Local Area Network (WLAN) within the same propagation environment. Inserting a half-wavelength slot structure with additional small patches gap attached have resulted frequency notched band characteristics. The small patches gap instead of switching that will be used to shortened and lengthen the slot length. The measured return loss, radiation patterns, and phase have good agreement with the simulated results. The antenna provides an omnidirectional pattern with the return loss less than -10 dB and linear in phase.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Yusnita Rahayu, Yusnita Rahayu
author_facet	Yusnita Rahayu, Yusnita Rahayu
author_sort	Yusnita Rahayu, Yusnita Rahayu
title	Design and development of antenna for ultra wideband applications
title_short	Design and development of antenna for ultra wideband applications
title_full	Design and development of antenna for ultra wideband applications
title_fullStr	Design and development of antenna for ultra wideband applications
title_full_unstemmed	Design and development of antenna for ultra wideband applications
title_sort	design and development of antenna for ultra wideband applications
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2008
url	http://eprints.utm.my/id/eprint/18717/1/YusnitaRahayuPFKE2008.pdf
_version_	1747815341638025216

Design and development of antenna for ultra wideband applications

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