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Proceedings Paper

Fast high-resolution terahertz radar imaging at 25 meters
Author(s): Ken B. Cooper; Robert J. Dengler; Nuria Llombart; Ashit Talukder; Anand V. Panangadan; Chris S. Peay; Imran Mehdi; Peter H. Siegel
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Paper Abstract

We report improvements in the scanning speed and standoff range of an ultra-wide bandwidth terahertz (THz) imaging radar for person-borne concealed object detection. Fast beam scanning of the single-transceiver radar is accomplished by rapidly deflecting a flat, light-weight subreflector in a confocal Gregorian optical geometry. With RF back-end improvements also implemented, the radar imaging rate has increased by a factor of about 30 compared to that achieved previously in a 4 m standoff prototype instrument. In addition, a new 100 cm diameter ellipsoidal aluminum reflector yields beam spot diameters of approximately 1 cm over a 50×50 cm field of view at a range of 25 m, although some aberrations are observed that probably arise from misaligned optics. Through-clothes images of concealed pipes at 25 m range, acquired in 5 seconds, are presented, and the impact of reduced signal-to-noise from an even faster frame rate is analyzed. These results inform the requirements for eventually achieving sub-second or video-rate THz radar imaging.

Paper Details

Date Published: 26 April 2010
PDF: 8 pages
Proc. SPIE 7671, Terahertz Physics, Devices, and Systems IV: Advanced Applications in Industry and Defense, 76710Y (26 April 2010); doi: 10.1117/12.850395
Show Author Affiliations
Ken B. Cooper, Jet Propulsion Lab. (United States)
Robert J. Dengler, Jet Propulsion Lab. (United States)
Nuria Llombart, Univ. Complutense de Madrid (Spain)
Ashit Talukder, Jet Propulsion Lab. (United States)
Anand V. Panangadan, Jet Propulsion Lab. (United States)
Chris S. Peay, Jet Propulsion Lab. (United States)
Imran Mehdi, Jet Propulsion Lab. (United States)
Peter H. Siegel, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 7671:
Terahertz Physics, Devices, and Systems IV: Advanced Applications in Industry and Defense
Mehdi Anwar; Nibir K. Dhar; Thomas W. Crowe, Editor(s)

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