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Ridged waveguide feed structures for reconfigurable antenna

  • US 10,256,548 B2
  • Filed: 01/30/2015
  • Issued: 04/09/2019
  • Est. Priority Date: 01/31/2014
  • Status: Active Grant
First Claim
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1. A reconfigurable holographic antenna comprising:

  • a metamaterial layer including an array of tunable slots configurable to form holographic diffraction patterns, wherein a reactance of each tunable slot in the array of tunable slots is individually tunable; and

    a ridged waveguide including a ridge configured to reduce mutual coupling between proximate tunable slots in the array of tunable slots when a received feed wave propagates through the ridged waveguide, wherein the ridge of the ridged waveguide is disposed lengthwise down the ridged waveguide, and wherein a first portion of the array of tunable slots is disposed on a first part of the metamaterial layer having a first slope and a second portion of the array of tunable slots is disposed on a part of the metamaterial layer having a second slope with the ridge being located beneath where the first and second parts of the metamaterial layer meet,wherein the metamaterial layer is conductively coupled to the ridged waveguide, and wherein the holographic diffraction patterns formed by the array of tunable slots generate a desired antenna wave in response to the received feed wave.

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