Travelling-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. / Thesis (Ph.D.)-University of Natal, Durban, 1985.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:ukzn/oai:http://researchspace.ukzn.ac.za:10413/6892 |
| Date | January 1985 |
| Creators | Ham, Ronald Edgar. |
| Contributors | Nattrass, H. L. |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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