A 300 GHz "Always-in-Focus" Focusing System for Target Detection
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Date
2013-06
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Společnost pro radioelektronické inženýrství
Abstract
A focusing system for a 300 GHz radar with 5 m target distance and 10 mm diameter spot size resolution is proposed. The focusing system is based on a Gaussian telescope scheme and its main parameters have been de¬signed using Gaussian beam quasi-optical propagation theory with an in-house developed MATLAB® based analysis tool. Then, this approach has been applied to a real focusing system based on two elliptical mirrors in order to reduce the distortion and cross-polar level and a plane mirror to provide scanning capabilities. The over¬all system has been simulated with a full-wave electromag¬netic simulator and its behavior is presented. With this approach, the focusing system always works "in-focus" since the only mirror that is rotated when scanning is the output plane mirror, so the beam is almost not distorted. The design process, although based in the well-known Gaussian beam quasi-optical propagation theory, provides a fast and accurate method and minimizes the overall size of the mirrors. As a consequence, the size of the focusing system is also reduced.
Description
Citation
Radioengineering. 2013, vol. 22, č. 2, s. 610-617. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2013/13_02_0610_0617.pdf
http://www.radioeng.cz/fulltexts/2013/13_02_0610_0617.pdf
Document type
Peer-reviewed
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Published version
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Language of document
en