Show simple item record

dc.contributor.advisorNattrass, H. L.
dc.creatorHam, Ronald Edgar.
dc.date.accessioned2012-10-14T13:54:22Z
dc.date.available2012-10-14T13:54:22Z
dc.date.created1985
dc.date.issued1985
dc.identifier.urihttp://hdl.handle.net/10413/6892
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.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


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record