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Surface scattering antenna improvements

  • US 9,385,435 B2
  • Filed: 03/15/2013
  • Issued: 07/05/2016
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. An antenna, comprising:

  • a wave-propagating structure; and

    a plurality of subwavelength patch elements distributed along the wave-propagating structure with inter-element spacings less than one-third of a free-space wavelength corresponding to an operating frequency of the antenna, where the plurality of subwavelength patch elements have a plurality of adjustable individual electromagnetic responses to a guided wave mode of the wave-propagating structure, and the plurality of adjustable individual electromagnetic responses provide an adjustable radiation field of the antenna;

    wherein the wave-propagating structure includes a conducting surface, and the plurality of subwavelength patch elements corresponds to a plurality of conducting patches respectively positioned at least partially above a respective plurality of irises in the conducting surface; and

    wherein the plurality of conducting patches is configured to provide a plurality of elliptically-polarized radiation fields responsive to iris-intermediated couplings between the conducting patches and the guided wave mode.

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