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Detection of a replica bomb belt concealed on a mannequin at 4 m standoff range is achieved using a 670 GHz imaging radar. At a somewhat larger standoff range of 4.6 m, the radar's beam width increases substantially, but the through-shirt image quality remains good. This suggests that a relatively modest increase in aperture size over the current design will be sufficient to detect person-borne concealed...
The development of a submillimeter imaging radar is useful for applications in national security, planetary exploration, and biomedicine. However, the extension to a multi-pixel heterodyne system presents a large integration challenge at this frequency range. A partial solution suggested in this paper is a compromise between the single pixel and multi-pixel system. To our knowledge, the idea of multiplexing...
Since the first report on our submillimeter-wave imaging system with radar ranging capabilities, several advances have been made in system performance. Range resolution as well as cross-range resolution are significantly improved, and image acquisition time has been reduced from over 5 minutes to under 1 minute. Here we report on performance improvements to specific key components and software that...
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