The application of quasi-optical techniques to millimetre wave radar
Abstract
The application of Quasi Optical techniques has been of great benefit to the field
of instrumentation for frequencies between 750Hz and several hundred OHz. The
application of Quasi Optical techniques to millimetre wave radar, described in this
thesis, has produced an FMCW Doppler radar capable of operation at 940Hz and
1400Hz. Total polarization agility and a capability to operate over a very wide
bandwidth is demonstrated. Quasi Optical circuits are proposed as solutions for many
of the system requirements, and these are fully analyzed. Significant benefits of these
techniques are demonstrated, and future improvements are suggested.
A new design tool, in the form of a program, for Quasi Optical circuit analysis is
presented and is used for the analysis of all the optical circuits in this thesis. The
program has speeded up the design process for optical circuits.
A new type of feedhorn is described and characterized. Its performance
compares well with existing feedhorns, and it provides a low cost alternative to existing
antenna requirements.
Type
Thesis, PhD Doctor of Philosophy
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