Ridged waveguide feed structures for reconfigurable antenna
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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Abstract
A reconfigurable holographic antenna includes a metamaterial layer and a waveguide with at least one ridge. The metamaterial layer includes an array of tunable slots configurable to form holographic diffraction patterns. A reactance of each tunable slot in the array of tunable slots is individually tunable. The at least one ridge influences coupling between tunable slots in the array of tunable slots. The holographic diffraction patterns formed by the array of tunable slots generate a desired antenna wave in response to a received feed wave.
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Citations
21 Claims
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1. A reconfigurable holographic antenna comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A reconfigurable holographic antenna comprising:
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a metamaterial layer including an array of tunable slots configurable to form holographic diffraction patterns, wherein a reactance of each slot in the array of tunable slots is individually tunable; and a double-ridge waveguide including two ridges positioned to reduce mutual coupling between proximate tunable slots in the array of tunable slots when a received feed wave propagates through the double-ridge waveguide, wherein the holographic diffraction patterns formed by the array of tunable slots generate a desired antenna wave in response to the received feed wave, wherein the two ridges are disposed lengthwise down the double-ridge waveguide, and further wherein the array of tunable slots comprises a first array of tunable slots on a portion of the metamaterial layer above a first ridge of the two ridges and a second array of tunable slots on a portion of the metamaterial layer above a second ridge of the two ridges, the first array of tunable slots configurable to form a first holographic diffraction pattern to steer a feed signal to at least receive or transmit a first communication signal on a first band and the second array of tunable slots configurable to form a second holographic diffraction pattern to steer a feed signal to at least receive or transmit a second communication signal on a second band, the first and second bands being different. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification