21 August 1998 Beam-steering technologies for real-time passive millimeter-wave imaging
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The long-term potential of terrestrial passive millimeter-wave imaging is contingent upon demonstrating real-time imaging with a system that can be conveniently integrated into a ship, land vehicle or aircraft. For small imagers with modest resolution, this can be readily achieved using fully-staring focal plane arrays, but as in the infrared, the high cost per pixel means that scanning (preferably electronic) of a smaller number of detectors, across the image is attractive. Aperture synthesis using sparse and filled arrays of antennas offers high sensitivity and resolution from a small number of antennas that can be conformal to vehicle shape, but requires complicated beam-forming technologies. Alternatively, electronic scanning can be accomplished by electronic modulation of a filled antenna. This discusses approaches and technology requirements for achieving electronic beam- steering.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andrew Robert Harvey, Andrew Robert Harvey, Roger Appleby, Roger Appleby, Paul M. Blanchard, Paul M. Blanchard, Alain H. Greenaway, Alain H. Greenaway, } "Beam-steering technologies for real-time passive millimeter-wave imaging", Proc. SPIE 3378, Passive Millimeter-Wave Imaging Technology II, (21 August 1998); doi: 10.1117/12.319406; https://doi.org/10.1117/12.319406


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