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Travelling-wave frequency conversion.

dc.contributor.advisorNattrass, Henry Lee.
dc.contributor.authorHam, Ronald Edgar.
dc.date.accessioned2012-10-14T13:54:22Z
dc.date.available2012-10-14T13:54:22Z
dc.date.created1985
dc.date.issued1985
dc.descriptionThesis (Ph.D.)-University of Natal, Durban, 1985.en
dc.description.abstractTravelling-wave distributed amplifiers are providing gain over broad frequency ranges for microwave applications. Similar concepts are applicable to distributed mixers and, with the use of controlled feedback, to a multifunction component simultaneously emulating a mixer, amplifier and an oscillator. The concept of this new travelling-wave frequency converter is introduced and data for a discrete component test circuit is presented. To facilitate the converter operation a new three-port travelling-wave mixer is introduced and characterized. Four-port scattering and wave scattering transformations are derived as a method of analysis of the four-port distributed structure. This enables sequential circuit analysis on a small computer. Practical applications unique to the advanced automatic network analyser, including time domain measurements, are presented to characterize test circuits as well as to develop ancillary equipment such as a transistor test fixture. Automated error corrected transistor measurements and de-embedding are also discussed. A piecewise linear quantum mechanical method of modelling the conduction channel of a short gate field effect transistor is given to aid the extrapolation of the distributed frequency converter concept to submicron and heterojunction structures.en
dc.identifier.urihttp://hdl.handle.net/10413/6892
dc.language.isoenen
dc.subjectTravelling wave tubes.en
dc.subjectDistributed amplifiers.en
dc.subjectMicrowave circuits.en
dc.subjectTheses--Electronic engineering.en
dc.titleTravelling-wave frequency conversion.en
dc.typeThesisen

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