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Proceedings Paper

Passive millimeter-wave imaging at short and medium range
Author(s): H. Essen; H.-H. Fuchs; D. Nötel; F. Klöppel; P. Pergande; S. Stanko
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Paper Abstract

During recent year's research on radiometric signatures, non-imaging, of the exhaust jet of missiles and imaging, on small vehicles in critical background scenarios were conducted by the mmW/submmW-group at FGAN-FHR. The equipment used for these investigations was of low technological status using simple single channel radiometers on a scanning pedestal. Meanwhile components of improved performance are available on a cooperative basis with the Institute for Applied Solid State Physics (Fraunhofer-IAF). Using such components a considerable progress concerning the temperature resolution and image generation time could be achieved. Emphasis has been put on the development of a demonstrator for CWD applications and on an imaging system for medium range applications, up to 200 m. The short range demonstrator is a scanning system operating alternatively at 35 GHz or 94 GHz to detect hidden materials as explosives, guns, knifes beneath the clothing. The demonstrator uses a focal plane array approach using 4 channels in azimuth, while mechanical scanning is used for the elevation. The medium range demonstrator currently employs a single channel radiometer on a pedestal for elevation over azimuth scanning. To improve the image quality, methods have been implemented using a Lorentzian algorithm with Wiener filtering.

Paper Details

Date Published: 7 November 2005
PDF: 7 pages
Proc. SPIE 5989, Technologies for Optical Countermeasures II; Femtosecond Phenomena II; and Passive Millimetre-Wave and Terahertz Imaging II, 598916 (7 November 2005); doi: 10.1117/12.627956
Show Author Affiliations
H. Essen, FGAN Research Institute for High Frequency Physics and Radar Technologies (Germany)
H.-H. Fuchs, FGAN Research Institute for High Frequency Physics and Radar Technologies (Germany)
D. Nötel, FGAN Research Institute for High Frequency Physics and Radar Technologies (Germany)
F. Klöppel, FGAN Research Institute for High Frequency Physics and Radar Technologies (Germany)
P. Pergande, FGAN Research Institute for High Frequency Physics and Radar Technologies (Germany)
S. Stanko, FGAN Research Institute for High Frequency Physics and Radar Technologies (Germany)


Published in SPIE Proceedings Vol. 5989:
Technologies for Optical Countermeasures II; Femtosecond Phenomena II; and Passive Millimetre-Wave and Terahertz Imaging II
Sean M. Kirkpatrick; David H. Titterton; Roger Appleby; J. Martyn Chamberlain; Razvan Stoian; Keith A. Krapels, Editor(s)

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