Improve antenna performances by DGS techniques / Rosmawati Shafie

This thesis presents the design of microstrip circular patch antenna with Defected Ground Structure (DGS) for wireless communication. Microstrip patch antenna is chosen from the several types of antenna because of simple, inexpensive and easy to fabricate. However, major disadvantages of this type o...

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Main Author:	Shafie, Rosmawati
Format:	Thesis
Language:	English
Published:	2013
Subjects:	Wireless communication systems Mobile communication systems Access control Microstrip antennas
Online Access:	https://ir.uitm.edu.my/id/eprint/67869/1/67869.pdf
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id	my-uitm-ir.67869
record_format	uketd_dc
spelling	my-uitm-ir.678692023-05-08T04:15:59Z Improve antenna performances by DGS techniques / Rosmawati Shafie 2013 Shafie, Rosmawati Wireless communication systems. Mobile communication systems. Access control Microstrip antennas This thesis presents the design of microstrip circular patch antenna with Defected Ground Structure (DGS) for wireless communication. Microstrip patch antenna is chosen from the several types of antenna because of simple, inexpensive and easy to fabricate. However, major disadvantages of this type of antenna are low performances in term of gain, VSWR, return loss, radiation pattern and bandwidth. The size of microstrip antenna also is not suitable for the wireless applications. For this purpose, Defected Ground Structure (DGS) is used to improve the performances of microstrip antenna. DGS means by modifying the ground plane metal to disturb the shielded current distribution depending on the dimension and shape of the defect. The interruption at the shielded current distribution will influence the current flow and the input impedance of the antenna. It also will control the excitation and electromagnetic waves propagating through the substrate layer. The proposed antenna has been simulated at 2.45 GHz frequency using Computer Simulation Tool (CST) Design Environment software. The substrate using Frame Retardant 4 (FR-4) with sr = 4.7 and thickness 0.8mm. Copper with thickness 0.035mm is used as a patch and ground. DGS with various sizes and shapes is build below the circular patch. The resultant antenna with DGS and without DGS was analyzed in term of return loss, bandwidth, gain, Voltage Standing Wave Ratio (VSWR), and radiation pattern. The fabricated antenna was then to be measured by Vector Network Analyzer (VNA) to carry out its Sn and VSWR result. The result from simulation and measurement will be compared. 2013 Thesis https://ir.uitm.edu.my/id/eprint/67869/ https://ir.uitm.edu.my/id/eprint/67869/1/67869.pdf text en public masters Universiti Teknologi MARA (UiTM) Faculty of Electrical Engineering Ali, Mohd. Tarmizi
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Ali, Mohd. Tarmizi
topic	Wireless communication systems Mobile communication systems Access control Microstrip antennas
spellingShingle	Wireless communication systems Mobile communication systems Access control Microstrip antennas Shafie, Rosmawati Improve antenna performances by DGS techniques / Rosmawati Shafie
description	This thesis presents the design of microstrip circular patch antenna with Defected Ground Structure (DGS) for wireless communication. Microstrip patch antenna is chosen from the several types of antenna because of simple, inexpensive and easy to fabricate. However, major disadvantages of this type of antenna are low performances in term of gain, VSWR, return loss, radiation pattern and bandwidth. The size of microstrip antenna also is not suitable for the wireless applications. For this purpose, Defected Ground Structure (DGS) is used to improve the performances of microstrip antenna. DGS means by modifying the ground plane metal to disturb the shielded current distribution depending on the dimension and shape of the defect. The interruption at the shielded current distribution will influence the current flow and the input impedance of the antenna. It also will control the excitation and electromagnetic waves propagating through the substrate layer. The proposed antenna has been simulated at 2.45 GHz frequency using Computer Simulation Tool (CST) Design Environment software. The substrate using Frame Retardant 4 (FR-4) with sr = 4.7 and thickness 0.8mm. Copper with thickness 0.035mm is used as a patch and ground. DGS with various sizes and shapes is build below the circular patch. The resultant antenna with DGS and without DGS was analyzed in term of return loss, bandwidth, gain, Voltage Standing Wave Ratio (VSWR), and radiation pattern. The fabricated antenna was then to be measured by Vector Network Analyzer (VNA) to carry out its Sn and VSWR result. The result from simulation and measurement will be compared.
format	Thesis
qualification_level	Master's degree
author	Shafie, Rosmawati
author_facet	Shafie, Rosmawati
author_sort	Shafie, Rosmawati
title	Improve antenna performances by DGS techniques / Rosmawati Shafie
title_short	Improve antenna performances by DGS techniques / Rosmawati Shafie
title_full	Improve antenna performances by DGS techniques / Rosmawati Shafie
title_fullStr	Improve antenna performances by DGS techniques / Rosmawati Shafie
title_full_unstemmed	Improve antenna performances by DGS techniques / Rosmawati Shafie
title_sort	improve antenna performances by dgs techniques / rosmawati shafie
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Electrical Engineering
publishDate	2013
url	https://ir.uitm.edu.my/id/eprint/67869/1/67869.pdf
_version_	1783735739357331456

Improve antenna performances by DGS techniques / Rosmawati Shafie

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