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Thin linear-to-circular polarizers with enhanced bandwidth
Dissertation (MEng)--University of Pretoria, 2018.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2018
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| _version_ | 1867613651790200832 |
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| access_status_str | Open Access |
| author2 | Joubert, Johan |
| author_browse | Joubert, Johan |
| author_facet | Joubert, Johan |
| collection | Thesis |
| dc_rights_str_mv | © 2018 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2018. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/64557 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:32.610Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/64557 Thin linear-to-circular polarizers with enhanced bandwidth Joubert, Johan u11203847@tuks.co.za Odendaal, J.W. (Johann Wilhelm) Van den Berg, Monique Enhanced bandwidth Frequency selective surface Linear-to-circular Metasurface Polarizer Single-layer UCTD Dissertation (MEng)--University of Pretoria, 2018. Circular polarization is valuable for many electromagnetic radiation applications such as wireless and satellite communication, radars, RFID, global positioning systems, etc. Many efforts have been made to manipulate and control polarization by using linear-to-linear or linear-to-circular transmission or reflection polarization converters. Most of the existing linear-to-circular single-layer polarizers have been found to be narrowband. Some attempts have been made to improve the bandwidth of these polarizers including using multiple layered structures at the expense of a bulkier device. There was, however, still a requirement for thin single-layer linear-to-circular polarizers with enhanced bandwidth. The purpose of this research was to design two thin single-layer linear-to-circular polarizers, one for transmission and the other for reflection, with enhanced bandwidth. A thin single-layer linear-to-circular transmission polarizer with a 3 dB axial ratio bandwidth of 34% is presented. The bandwidth of this polarizer is significantly better than that of previously published polarizers of the same type. The unit cell of the polarizer consists of an I-shaped strip and a perpendicular linear strip printed on the one side of a thin dielectric substrate and two additional capacitive coupling strips printed on the other side of the substrate. Experimental results were found to agree well with the simulated results. A thin single-layer reflective linear-to-circular polarizer with a 3 dB axial ratio bandwidth of 57% is also presented. The unit cell of the polarizer consists of an I-shaped strip and a perpendicular linear strip printed on the one side of a substrate and a ground plane on the other side of the substrate. Experimental results for this polarizer were also found to agree well with the simulated results. Electrical, Electronic and Computer Engineering MEng Unrestricted 2018-04-16T06:58:41Z 2018-04-16T06:58:41Z 2018-05-03 2018 Dissertation Van den Berg, M 2018, Thin linear-to-circular polarizers with enhanced bandwidth, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/64557> http://hdl.handle.net/2263/64557 en © 2018 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Enhanced bandwidth Frequency selective surface Linear-to-circular Metasurface Polarizer Single-layer UCTD Thin linear-to-circular polarizers with enhanced bandwidth |
| title | Thin linear-to-circular polarizers with enhanced bandwidth |
| title_full | Thin linear-to-circular polarizers with enhanced bandwidth |
| title_fullStr | Thin linear-to-circular polarizers with enhanced bandwidth |
| title_full_unstemmed | Thin linear-to-circular polarizers with enhanced bandwidth |
| title_short | Thin linear-to-circular polarizers with enhanced bandwidth |
| title_sort | thin linear to circular polarizers with enhanced bandwidth |
| topic | Enhanced bandwidth Frequency selective surface Linear-to-circular Metasurface Polarizer Single-layer UCTD |
| url | http://hdl.handle.net/2263/64557 |