Metamaterial Apertures for Computational Imaging

Abstract

By leveraging metamaterials and compressive imaging, a low-profile aperture capable of microwave imaging without lenses, moving parts, or phase shifters is demonstrated. This designer aperture allows image compression to be performed on the physical hardware layer rather than in the postprocessing stage, thus averting the detector, storage, and transmission costs associated with full diffraction-limited sampling of a scene. A guided-wave metamaterial aperture is used to perform compressive image reconstruction at 10 frames per second of two-dimensional (range and angle) sparse still and video scenes at K-band (18 to 26 gigahertz) frequencies, using frequency diversity to avoid mechanical scanning. Image acquisition is accomplished with a 40:1 compression ratio.

Authors: John Hunt, Tom Driscoll, Alex Mrozack, Guy Lipworth, Matthew Reynolds, David Brady, David R. Smith
  • Received for publication 11 September 2012.
  • Accepted for publication 22 November 2012.
  • Science
    Vol. 339 no. 6117 pp. 310-313
    DOI: 10.1126/science.1230054                       

    Source:
    http://www.sciencemag.org/content/339/6117/310

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