Planar ultra wide band antenna with band rejector

Ultra wideband (UWB) that occupies the range of (3.1-10.6) GHz was proposed due to the progressive need of high data rates for modern applications and lack of bandwidth in lower frequencies. UWB systems have become fundamental in high speed wireless communications that are used for short range indoo...

Full description

Saved in:

Bibliographic Details
Main Author:	Nada, Ahmed Hafedh
Format:	Thesis
Language:	English
Published:	2020
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/92206/1/AhmedHafedhNadaMSKE2020.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.92206
record_format	uketd_dc
spelling	my-utm-ep.922062021-08-30T05:10:12Z Planar ultra wide band antenna with band rejector 2020 Nada, Ahmed Hafedh TK Electrical engineering. Electronics Nuclear engineering Ultra wideband (UWB) that occupies the range of (3.1-10.6) GHz was proposed due to the progressive need of high data rates for modern applications and lack of bandwidth in lower frequencies. UWB systems have become fundamental in high speed wireless communications that are used for short range indoor applications due to their features such as low power consumption, small size, and low cost. Antennas are essential part of the UWB systems, especially planar antennas because they can be fabricated easily. But an electromagnetic interference may occur due to the existence of narrowband systems like wireless local area networks (WLANs) that operate at 5.8 GHz which is inside the UWB band. Therefore, UWB antennas should also avoid those frequencies in order to obtain more efficient operating system. Thus, special structure known as electromagnetic band gap (EBG) structures can be used as band rejecter in order to reject the interlaced band. This project focuses on EBG structures and how they can be incorporated with UWB antennas. Firstly, a new planar UWB antenna structure that operates at UWB frequency range (3.08-10.7 GHz) is presented using half ground plane method. The antenna achieved a peak gain of 5.26 dB. Moreover, it exhibits a radiation efficiency of higher than 74% over its bandwidth. Then, a study is conducted on EBG mushroom-like shape using suspended transmission line method. Next, a new EBG structure that operates at 5.8 GHz is proposed. Shortly after, the designed structures are incorporated together to perform the intended function of an UWB with a gap at 5.8 GHz. The new structure has a notch of 0.7 GHz in terms of (S11=-10 dB), whereas the rejected band is 0.18 GHz. Additionally, outside the rejected band, the performance of the UWB antenna was not much affected by adding the EBG. In fact, excluding the notch, the antenna bandwidth increased to cover the range from 2.91 GHz to 11 GHz. FR4 substrate with is used for all designs. Simulations are conducted using CST software, and all the results are presented into graphs and tables. 2020 Thesis http://eprints.utm.my/id/eprint/92206/ http://eprints.utm.my/id/eprint/92206/1/AhmedHafedhNadaMSKE2020.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:136446 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Electrical Engineering Faculty of Engineering - School 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 Nada, Ahmed Hafedh Planar ultra wide band antenna with band rejector
description	Ultra wideband (UWB) that occupies the range of (3.1-10.6) GHz was proposed due to the progressive need of high data rates for modern applications and lack of bandwidth in lower frequencies. UWB systems have become fundamental in high speed wireless communications that are used for short range indoor applications due to their features such as low power consumption, small size, and low cost. Antennas are essential part of the UWB systems, especially planar antennas because they can be fabricated easily. But an electromagnetic interference may occur due to the existence of narrowband systems like wireless local area networks (WLANs) that operate at 5.8 GHz which is inside the UWB band. Therefore, UWB antennas should also avoid those frequencies in order to obtain more efficient operating system. Thus, special structure known as electromagnetic band gap (EBG) structures can be used as band rejecter in order to reject the interlaced band. This project focuses on EBG structures and how they can be incorporated with UWB antennas. Firstly, a new planar UWB antenna structure that operates at UWB frequency range (3.08-10.7 GHz) is presented using half ground plane method. The antenna achieved a peak gain of 5.26 dB. Moreover, it exhibits a radiation efficiency of higher than 74% over its bandwidth. Then, a study is conducted on EBG mushroom-like shape using suspended transmission line method. Next, a new EBG structure that operates at 5.8 GHz is proposed. Shortly after, the designed structures are incorporated together to perform the intended function of an UWB with a gap at 5.8 GHz. The new structure has a notch of 0.7 GHz in terms of (S11=-10 dB), whereas the rejected band is 0.18 GHz. Additionally, outside the rejected band, the performance of the UWB antenna was not much affected by adding the EBG. In fact, excluding the notch, the antenna bandwidth increased to cover the range from 2.91 GHz to 11 GHz. FR4 substrate with is used for all designs. Simulations are conducted using CST software, and all the results are presented into graphs and tables.
format	Thesis
qualification_level	Master's degree
author	Nada, Ahmed Hafedh
author_facet	Nada, Ahmed Hafedh
author_sort	Nada, Ahmed Hafedh
title	Planar ultra wide band antenna with band rejector
title_short	Planar ultra wide band antenna with band rejector
title_full	Planar ultra wide band antenna with band rejector
title_fullStr	Planar ultra wide band antenna with band rejector
title_full_unstemmed	Planar ultra wide band antenna with band rejector
title_sort	planar ultra wide band antenna with band rejector
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Electrical Engineering
granting_department	Faculty of Engineering - School of Electrical Engineering
publishDate	2020
url	http://eprints.utm.my/id/eprint/92206/1/AhmedHafedhNadaMSKE2020.pdf
_version_	1747818578917195776

Planar ultra wide band antenna with band rejector

Similar Items