The application of quasi-optical techniques to millimetre wave radar

Optical radar;Optical radar--Computer simulation

Leeson, Michael. J. ; Lesurf, J. C. G. ; Lesurf, J. C. G.

University:University of St Andrews

Department:Physics & Astronomy (School of)

关键词: Optical radar;    Optical radar--Computer simulation;   

Others  :  https://research-repository.st-andrews.ac.uk/bitstream/handle/10023/2774/MichaelJLeesonPhDThesis.pdf?sequence=3&isAllowed=y

来源: DR-NTU

【 摘 要 】

The application of Quasi Optical techniques has been of great benefit to the fieldof instrumentation for frequencies between 750Hz and several hundred OHz. Theapplication of Quasi Optical techniques to millimetre wave radar, described in thisthesis, has produced an FMCW Doppler radar capable of operation at 940Hz and1400Hz. Total polarization agility and a capability to operate over a very widebandwidth is demonstrated. Quasi Optical circuits are proposed as solutions for manyof the system requirements, and these are fully analyzed. Significant benefits of thesetechniques are demonstrated, and future improvements are suggested.A new design tool, in the form of a program, for Quasi Optical circuit analysis ispresented and is used for the analysis of all the optical circuits in this thesis. Theprogram has speeded up the design process for optical circuits.A new type of feedhorn is described and characterized. Its performancecompares well with existing feedhorns, and it provides a low cost alternative to existingantenna requirements.