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Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder
Tesis (M. Ing.) -- Universiteit van Stellenbosch, 1993.
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| Format: | Thesis |
| Language: | af_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867614117568708609 |
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| access_status_str | Open Access |
| author | Anthonissen, Lukas Willem |
| author2 | Van der Walt, P. W. |
| author_browse | Anthonissen, Lukas Willem Van der Walt, P. W. |
| author_facet | Van der Walt, P. W. Anthonissen, Lukas Willem |
| author_sort | Anthonissen, Lukas Willem |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Tesis (M. Ing.) -- Universiteit van Stellenbosch, 1993. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/58024 |
| institution | Stellenbosch University (South Africa) |
| language | af_ZA |
| last_indexed | 2026-06-10T12:46:56.603Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/58024 Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder Anthonissen, Lukas Willem Van der Walt, P. W. Stellenbosch University. Faculty of Engineering. Department of Electrical and Electronic Engineering. Radio -- Antennas Radio filters Radio -- Equipment and supplies Radio resonators Shortwave radio Dissertations -- Electronic engineering UCTD Tesis (M. Ing.) -- Universiteit van Stellenbosch, 1993. ENGLISH ABSTRACT: The design of a compact narrowband UHF diplexer involves a complicated network synthesis problem. The complexity of the synthesis problem, in particular the diplexing of two signal paths to achieve a three port network, renders conventional exact approximations insufficient. Recent advances in computer aided network optimization facilities a synthesis procedure whereby an approximate set of element values can be optimized to achieve an exact network. Conventiona UHF resonators were assessed for mechanical stability, low losses and ease of implementation. This resulted in the development of a coaxial resonator that supports two modes of resonance. An approximate synthesis procedure is presented whereby resonators in a coupled resonator bandpass prototype are replaced by modified resonators suitable for implementation in a coaxial structure. The resultant filter is of a compact dimensions with exceptional attenuation characteristics near the passband. An approximate model was developed for the losses in a stepped transmission line resonator. This approximation was verified by practical measurements. A compact narrowband filter was implemented. The results of practical measurements are included. AFRIKAANSE OPSOMMING: Die ontwerp van 'n nouband UHF-diplekser behels 'n ingewikkelde netwerksintese probleem. Weens die kompleksiteit van die sinteseprobleem, veral die dipleksering van twee seinpaaie om 'n driepoortnetwerk te vorm, is konvensionele eksakte benaderings selde voldoende. Die huidige ontwikkeling op die gebied van rekenaargesteunde netwerkoptimering vergemaklik 'n sintese waarvolgens 'n benaderde stel elementwaardes gebruik word om 'n eksakte netwerk deur optimering te verkry. Konvensionele UHF-resoneerders is ondersoek vir meganiese stabiliteit, verliese en implementeerbaarheid. Die gevolg hiervan is die bekendstelling van 'n koaksiale resoneerder wat twee modusse van resonansie ondersteun. 'n Netwerksintese benadering word aangebied waarvolgens resoneerders in 'n gekoppelde resoneerder banddeurlaatprototipe vervang word met aangepaste resoneerders geskik vir implementering in 'n koaksiale struktuur. Die resultaat is 'n filter van kompakte afmetings met besonder goeie verswakkingseienskappe naby die deurlaatband. 'n Benaderde model vir die verliese in 'n gestapte transmissielyn struktuur is ontwikkel. Hierdie benadering is geverifieer met die resulate van 'n praktiese opmeting. 'n Kompakte nouband filter is geïmplimenteer. Praktiese resultate word ingelsuit. 2012-08-27T11:38:46Z 2012-08-27T11:38:46Z 1993 Thesis http://hdl.handle.net/10019.1/58024 af_ZA Stellenbosch University 153 pages : illustrations. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Radio -- Antennas Radio filters Radio -- Equipment and supplies Radio resonators Shortwave radio Dissertations -- Electronic engineering UCTD Anthonissen, Lukas Willem Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder |
| title | Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder |
| title_full | Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder |
| title_fullStr | Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder |
| title_full_unstemmed | Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder |
| title_short | Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder |
| title_sort | kompakte lae verlies diplekser met gestapte transmissielyn resoneerder |
| topic | Radio -- Antennas Radio filters Radio -- Equipment and supplies Radio resonators Shortwave radio Dissertations -- Electronic engineering UCTD |
| url | http://hdl.handle.net/10019.1/58024 |
| work_keys_str_mv | AT anthonissenlukaswillem kompaktelaeverliesdipleksermetgestaptetransmissielynresoneerder |