A 300 GHz 'Always-in-Focus' Focusing System for Target Detection
| Autor: | Montero-De-Paz, J., Luis Enrique Garcia Muñoz, Segovia-Vargas, D. |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Radioengineering, Vol 22, Iss 2, Pp 610-617 (2013) Scopus-Elsevier Radioengineering. 2013, vol. 22, č. 2, s. 610-617. ISSN 1210-2512 |
| ISSN: | 1210-2512 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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