Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics

The tremendous developments over the recent years in wireless communications applications led to the urgent need for the innovation of new technologies capable of vast data transfer rates at very low power consumption levels. Such technologies also require large portions of the frequency spectrum. U...

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Main Author:	Shareef, Wessam Zayd
Format:	Thesis
Language:	English
Published:	2010
Subjects:	Ultra-wideband antennas Microstrip antennas
Online Access:	http://psasir.upm.edu.my/id/eprint/40911/1/FK%202010%2043R.pdf
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id	my-upm-ir.40911
record_format	uketd_dc
spelling	my-upm-ir.409112015-10-05T06:44:04Z Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics 2010-09 Shareef, Wessam Zayd The tremendous developments over the recent years in wireless communications applications led to the urgent need for the innovation of new technologies capable of vast data transfer rates at very low power consumption levels. Such technologies also require large portions of the frequency spectrum. Ultra wideband (UWB) technology is being considered as a solution to address these issues. This technology attracted high attention especially after the allocation of 7.5 GHz spectrum bandwidth between 3.1 GHz and 10.6 GHz for the UWB civil applications by the Federal communication Commission (FCC). As is the case in conventional wireless communication systems, an antenna plays a significant role in achieving successful transmission and reception of information in the form of data packets using UWB systems. This thesis presents two new designs of notched band Ultra-Wideband printed antennas using microstrip and coplanar waveguide-fed configurations. Simple techniques of perforation the substrate and modifying the ground planes and radiator patches are used to achieve ultra wideband for the designed antennas with small structure. Narrow Arch-shaped slot was introduced to the patch of the proposed antennas to obtain the band rejection function around the 5.4 GHz frequency to avoid the interference with WLAN standards like IEEE 802.11a and HIPERLAN/2 Both UWB antennas were developed and analyzed by a 3D electromagnetic simulator. To confirm the simulation results, the two proposed antennas were fabricated on FR-4 substrate with dielectric constant of 4.4 and the experimental measurements were carried out using a network vector network analyzer (Anritsu 37347D). The analysis indicated a fairly good agreement between simulation and measurement. The measured bandwidth of the proposed microstrip-fed UWB antenna is ranging from 2.62 GHz up to 12.7 GHz with a return loss no more than -10 dB excluding a notched frequency starting from 5.1 GHz to 6 GHz. The overall size of the antenna is 20 × 21 × 1.6 mm3 The Measurement results of the proposed cpw-fed UWB antenna showed that this antenna has operational bandwidth starting from 2.45 GHz to 10.9 GHz with return loss better than -10 dB excluding the notched band from 4.83 GHz to 5.97 GHz. The antenna features the same compact size of the microstrip antenna (20 × 21 × 1.6 mm3). In the addition to the required UWB bandwidth, both designed antennas are exhibit high radiation efficiency, stable group delay and omni-directional pattern which makes them suitable for UWB portable wireless devices with their compact size feature. Ultra-wideband antennas Microstrip antennas 2010-09 Thesis http://psasir.upm.edu.my/id/eprint/40911/ http://psasir.upm.edu.my/id/eprint/40911/1/FK%202010%2043R.pdf application/pdf en public masters Universiti Putra Malaysia Ultra-wideband antennas Microstrip antennas
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Ultra-wideband antennas Microstrip antennas
spellingShingle	Ultra-wideband antennas Microstrip antennas Shareef, Wessam Zayd Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics
description	The tremendous developments over the recent years in wireless communications applications led to the urgent need for the innovation of new technologies capable of vast data transfer rates at very low power consumption levels. Such technologies also require large portions of the frequency spectrum. Ultra wideband (UWB) technology is being considered as a solution to address these issues. This technology attracted high attention especially after the allocation of 7.5 GHz spectrum bandwidth between 3.1 GHz and 10.6 GHz for the UWB civil applications by the Federal communication Commission (FCC). As is the case in conventional wireless communication systems, an antenna plays a significant role in achieving successful transmission and reception of information in the form of data packets using UWB systems. This thesis presents two new designs of notched band Ultra-Wideband printed antennas using microstrip and coplanar waveguide-fed configurations. Simple techniques of perforation the substrate and modifying the ground planes and radiator patches are used to achieve ultra wideband for the designed antennas with small structure. Narrow Arch-shaped slot was introduced to the patch of the proposed antennas to obtain the band rejection function around the 5.4 GHz frequency to avoid the interference with WLAN standards like IEEE 802.11a and HIPERLAN/2 Both UWB antennas were developed and analyzed by a 3D electromagnetic simulator. To confirm the simulation results, the two proposed antennas were fabricated on FR-4 substrate with dielectric constant of 4.4 and the experimental measurements were carried out using a network vector network analyzer (Anritsu 37347D). The analysis indicated a fairly good agreement between simulation and measurement. The measured bandwidth of the proposed microstrip-fed UWB antenna is ranging from 2.62 GHz up to 12.7 GHz with a return loss no more than -10 dB excluding a notched frequency starting from 5.1 GHz to 6 GHz. The overall size of the antenna is 20 × 21 × 1.6 mm3 The Measurement results of the proposed cpw-fed UWB antenna showed that this antenna has operational bandwidth starting from 2.45 GHz to 10.9 GHz with return loss better than -10 dB excluding the notched band from 4.83 GHz to 5.97 GHz. The antenna features the same compact size of the microstrip antenna (20 × 21 × 1.6 mm3). In the addition to the required UWB bandwidth, both designed antennas are exhibit high radiation efficiency, stable group delay and omni-directional pattern which makes them suitable for UWB portable wireless devices with their compact size feature.
format	Thesis
qualification_level	Master's degree
author	Shareef, Wessam Zayd
author_facet	Shareef, Wessam Zayd
author_sort	Shareef, Wessam Zayd
title	Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics
title_short	Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics
title_full	Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics
title_fullStr	Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics
title_full_unstemmed	Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics
title_sort	miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics
granting_institution	Universiti Putra Malaysia
publishDate	2010
url	http://psasir.upm.edu.my/id/eprint/40911/1/FK%202010%2043R.pdf
_version_	1747811848610119680

Miniaturization of microstrip and cpw-fed uwb printed antennas with band rejection characteristics

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