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, Roger Appleby, Paul M. Blanchard, 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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