Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder

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dc.contributor.advisorVan der Walt, P. W.en_ZA
dc.contributor.authorAnthonissen, Lukas Willemen_ZA
dc.contributor.otherStellenbosch University. Faculty of Engineering. Department of Electrical and Electronic Engineering.
dc.date.accessioned2012-08-27T11:38:46Z
dc.date.available2012-08-27T11:38:46Z
dc.date.issued1993
dc.descriptionTesis (M. Ing.) -- Universiteit van Stellenbosch, 1993.
dc.description.abstractENGLISH 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.en_ZA
dc.description.abstractAFRIKAANSE 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.af_ZA
dc.format.extent153 pages : illustrations.
dc.identifier.urihttp://hdl.handle.net/10019.1/58024
dc.language.isoaf_ZA
dc.publisherStellenbosch : Stellenbosch University
dc.rights.holderStellenbosch University
dc.subjectRadio -- Antennasen_ZA
dc.subjectRadio filtersen_ZA
dc.subjectRadio -- Equipment and suppliesen_ZA
dc.subjectRadio resonatorsen_ZA
dc.subjectShortwave radioen_ZA
dc.subjectDissertations -- Electronic engineeringen_ZA
dc.subjectUCTDen_ZA
dc.titleKompakte lae-verlies diplekser met gestapte transmissielyn resoneerderaf_ZA
dc.typeThesis
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