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Massively multi-user MIMO using space time holography

  • US 10,439,715 B2
  • Filed: 01/18/2017
  • Issued: 10/08/2019
  • Est. Priority Date: 07/01/2016
  • Status: Active Grant
First Claim
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1. An antenna system, comprising:

  • one or more feeds configured to receive an electromagnetic (EM) signal and propagate the EM signal as an EM reference wave;

    a plurality of tunable EM scattering elements spaced at sub-wavelength distances compared to the EM reference wave, the plurality of tunable EM scattering elements configured to operate in at least two different operational states to selectively scatter the EM reference wave as a radiated wave; and

    a wireless controller configured to wirelessly control the plurality of tunable EM scattering elements and modulate the radiated wave over time to deliver a plurality of different information streams to a plurality of different far-end locations by modulating the plurality of tunable EM scattering elements between the plurality of different operational states over time;

    a plurality of EM filters corresponding to the plurality of tunable EM scattering elements, wherein;

    the wireless controller includes an EM emitter configured to emit EM radiation encompassing a wide frequency range;

    each of the plurality of EM filters is configured to pass only a portion of the EM radiation encompassing the wide frequency range;

    the plurality of tunable EM scattering elements is configured to switch between the at least two different operational states responsive to receiving the portion of the EM radiation passed by the corresponding ones of the plurality of EM filters; and

    the wireless controller is configured to vary frequency content of the EM radiation to control the plurality of tunable EM scattering elements to deliver the plurality of different information streams to the plurality of different far-end locations.

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