A coplanar waveguide fed two arm archimedean spiral slot antenna

Spiral antennas gained a lot of popularity due to their circularly polarized radiation with a relatively constant input impedance and radiation pattern over wide frequency range.The conventional spiral antenna is fed from the center with the need for a balun and an impedance matching network. Howeve...

Full description

Saved in:
Bibliographic Details
Main Author: Abdelaziz Mashaal, Omar Ahmad
Format: Thesis
Language:English
Published: 2011
Subjects:
Online Access:http://eprints.utm.my/id/eprint/28687/1/OmarAhmadAbdelazizMFKE2011.pdf
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-utm-ep.28687
record_format uketd_dc
spelling my-utm-ep.286872018-05-27T06:38:55Z A coplanar waveguide fed two arm archimedean spiral slot antenna 2011-02 Abdelaziz Mashaal, Omar Ahmad TK Electrical engineering. Electronics Nuclear engineering Spiral antennas gained a lot of popularity due to their circularly polarized radiation with a relatively constant input impedance and radiation pattern over wide frequency range.The conventional spiral antenna is fed from the center with the need for a balun and an impedance matching network. However, this way of feeding increases the size of the antenna and put more constraints and difficulties in the designing process. In this project a coplanar waveguide fed two-arm Archimedean spiral slot antenna loaded with a chip resistor with improved circular polarization bandwidth and reduced size is presented and investigated.The antenna is studied through simulation and fabricating a prototype to verify the simulated results.The geometry of the antenna is similar to the conventional Archimedean spiral antenna. However, the antenna is situated in one plane and fed without the need for an external balun or an impedance matching network which allows compact and completely planar structure. Moreover, the proposed antenna, possesses the advantage of wide band impedance bandwidth and circularly polarized radiation pattern, less than 3dB axial ratio, with good radiation efficiency, larger than 60%, over 1.6:1 bandwidth. Furthermore, two techniques to improve the axial ratio bandwidth, have been studied and investigated. Finally, the characteristic impedance of the antenna and the lower operating frequency can be designed to match the requirements for many systems. 2011-02 Thesis http://eprints.utm.my/id/eprint/28687/ http://eprints.utm.my/id/eprint/28687/1/OmarAhmadAbdelazizMFKE2011.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:70361?site_name=Restricted Repository 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
spellingShingle TK Electrical engineering
Electronics Nuclear engineering
Abdelaziz Mashaal, Omar Ahmad
A coplanar waveguide fed two arm archimedean spiral slot antenna
description Spiral antennas gained a lot of popularity due to their circularly polarized radiation with a relatively constant input impedance and radiation pattern over wide frequency range.The conventional spiral antenna is fed from the center with the need for a balun and an impedance matching network. However, this way of feeding increases the size of the antenna and put more constraints and difficulties in the designing process. In this project a coplanar waveguide fed two-arm Archimedean spiral slot antenna loaded with a chip resistor with improved circular polarization bandwidth and reduced size is presented and investigated.The antenna is studied through simulation and fabricating a prototype to verify the simulated results.The geometry of the antenna is similar to the conventional Archimedean spiral antenna. However, the antenna is situated in one plane and fed without the need for an external balun or an impedance matching network which allows compact and completely planar structure. Moreover, the proposed antenna, possesses the advantage of wide band impedance bandwidth and circularly polarized radiation pattern, less than 3dB axial ratio, with good radiation efficiency, larger than 60%, over 1.6:1 bandwidth. Furthermore, two techniques to improve the axial ratio bandwidth, have been studied and investigated. Finally, the characteristic impedance of the antenna and the lower operating frequency can be designed to match the requirements for many systems.
format Thesis
qualification_level Master's degree
author Abdelaziz Mashaal, Omar Ahmad
author_facet Abdelaziz Mashaal, Omar Ahmad
author_sort Abdelaziz Mashaal, Omar Ahmad
title A coplanar waveguide fed two arm archimedean spiral slot antenna
title_short A coplanar waveguide fed two arm archimedean spiral slot antenna
title_full A coplanar waveguide fed two arm archimedean spiral slot antenna
title_fullStr A coplanar waveguide fed two arm archimedean spiral slot antenna
title_full_unstemmed A coplanar waveguide fed two arm archimedean spiral slot antenna
title_sort coplanar waveguide fed two arm archimedean spiral slot antenna
granting_institution Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department Faculty of Electrical Engineering
publishDate 2011
url http://eprints.utm.my/id/eprint/28687/1/OmarAhmadAbdelazizMFKE2011.pdf
_version_ 1747815679453560832