ANTENNA SYSTEM HAVING AT LEAST TWO APERTURES FACILITATING REDUCTION OF INTERFERING SIGNALS
First Claim
1. An antenna system comprising:
- an antenna assembly including at least two surface scattering antenna segments, each segment of the at least two surface scattering antenna segments including;
a respective electromagnetic waveguide structure; and
a respective plurality of electromagnetic wave scattering elements distributed along the waveguide structure and operable in combination to produce a controllable radiation pattern;
a gain definition circuit configured to define a series of at least two radiation patterns implementable by the at least two surface scattering antenna segments, the series of at least two respective radiation patterns selected to facilitate a convergence on an antenna radiation pattern that maximizes a radiation performance metric that includes reception of a signal from a desired field of view or rejection of a signal from an undesired field of view;
an antenna controller configured to sequentially establish each radiation pattern of the series of at least two radiation patterns by activating the respective electromagnetic response of selected electromagnetic wave scattering elements of the plurality of electromagnetic wave scattering elements of the at least two surface scattering antenna segments; and
a receiver configured to receive signals from the desired field of view and signals from the undesired field of view.
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Accused Products
Abstract
Described embodiments include an antenna system and method. The antenna system includes at least two surface scattering antenna segments. Each segment includes a respective electromagnetic waveguide structure, and a respective plurality of electromagnetic wave scattering elements. The wave scattering elements are distributed along the waveguide structure, have an inter-element spacing substantially less than a free-space wavelength of a highest operating frequency of the antenna segment, have a respective activatable electromagnetic response to a propagating guided wave, and are operable in combination to produce a controllable radiation pattern. A gain definition circuit defines a series of at least two radiation patterns selected to facilitate a convergence on an antenna radiation pattern that maximizes a radiation performance metric. An antenna controller sequentially establishes each radiation pattern. A receiver receives the desired field of view signal and the undesired field of view signal.
255 Citations
57 Claims
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1. An antenna system comprising:
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an antenna assembly including at least two surface scattering antenna segments, each segment of the at least two surface scattering antenna segments including; a respective electromagnetic waveguide structure; and a respective plurality of electromagnetic wave scattering elements distributed along the waveguide structure and operable in combination to produce a controllable radiation pattern; a gain definition circuit configured to define a series of at least two radiation patterns implementable by the at least two surface scattering antenna segments, the series of at least two respective radiation patterns selected to facilitate a convergence on an antenna radiation pattern that maximizes a radiation performance metric that includes reception of a signal from a desired field of view or rejection of a signal from an undesired field of view; an antenna controller configured to sequentially establish each radiation pattern of the series of at least two radiation patterns by activating the respective electromagnetic response of selected electromagnetic wave scattering elements of the plurality of electromagnetic wave scattering elements of the at least two surface scattering antenna segments; and a receiver configured to receive signals from the desired field of view and signals from the undesired field of view. - View Dependent Claims (2, 3, 4, 7, 8, 9, 10, 11, 12, 13, 16, 17, 18, 19, 20, 21, 22, 24, 26, 28, 29, 30, 32, 34, 35, 37, 38, 39, 41, 42, 43, 45)
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5. (canceled)
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6. (canceled)
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14. (canceled)
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15. (canceled)
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23. (canceled)
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25. (canceled)
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27. (canceled)
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31. (canceled)
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33. (canceled)
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36. (canceled)
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40. (canceled)
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44. (canceled)
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46. A method comprising:
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defining a first-iteration radiation pattern implementable by a first surface scattering antenna segment and another first-iteration radiation pattern implementable by a second surface scattering antenna segment of the at least two surface scattering antenna segments of an antenna assembly; implementing the first-iteration radiation pattern in the first surface scattering antenna segment and the another first-iteration radiation pattern in the second surface scattering antenna segment, the first-iteration radiation patterns established by activating a respective electromagnetic response of selected electromagnetic wave scattering elements of a plurality of electromagnetic wave scattering elements in each of the first and the second surface scattering antenna segments; receiving a combined signal from a desired field of view and a combined signal from an undesired field of view with the first and second antenna segments configured in the first-iteration radiation patterns; defining a second-iteration radiation pattern implementable by the first surface scattering antenna segment and another second-iteration radiation pattern implementable by the second surface scattering antenna segment, the second-iteration patterns selected in response to an aspect of the received signal from the desired field of view or the received signal from the undesired field of view, and configured to facilitate a convergence on an antenna radiation pattern that maximizes a radiation performance metric; implementing the second-iteration radiation pattern in the first surface scattering antenna segment and the another second-iteration radiation pattern in the second surface scattering antenna segment, the second-iteration radiation patterns established by activating a respective electromagnetic response of selected electromagnetic wave scattering elements of a plurality of electromagnetic wave scattering elements in each of the first and second surface scattering antenna segments; receiving the combined signal from a desired field of view and the combined signal from an undesired field of view with the first and second antenna segments configured in the second-iteration radiation patterns in accordance with the maximized performance metric; and outputting the combined signal from a desired field of view and the combined signal from an undesired field of view received in accordance with the maximized performance metric. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A system comprising:
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means for defining a first-iteration radiation pattern implementable by a first surface scattering antenna segment and another first-iteration radiation pattern implementable by a second surface scattering antenna segment of the at least two surface scattering antenna segments of an antenna assembly; means for implementing the first-iteration radiation pattern in the first surface scattering antenna segment and the another first-iteration radiation pattern in the second surface scattering antenna segment, the first-iteration radiation patterns established by activating respective electromagnetic response of selected electromagnetic wave scattering elements of a plurality of electromagnetic wave scattering elements in each of the first and the second surface scattering antenna segments; means for receiving a combined signal from a desired field of view and a combined signal from an undesired field of view with the first and second antenna segments configured in the first-iteration radiation patterns; means for defining a second-iteration radiation pattern implementable by the first surface scattering antenna segment and another second-iteration radiation pattern implementable by the second surface scattering antenna segment, the second-iteration patterns selected in response to an aspect of the received signal from the desired field of view or the received signal from the undesired field of view, and configured to facilitate a convergence on an antenna radiation pattern that maximizes a radiation performance metric; means for implementing the second-iteration radiation pattern in the first surface scattering antenna segment and the another second-iteration radiation pattern in a second surface scattering antenna segment, the second-iteration radiation patterns established by activating a respective electromagnetic response of selected electromagnetic wave scattering elements of a plurality of electromagnetic wave scattering elements in each of the first and second surface scattering antenna segments; means for receiving the combined signal from a desired field of view and the combined signal from an undesired field of view with the first and second antenna segments configured in the second-iteration radiation patterns in accordance with the maximized performance metric; and means for outputting the combined signal from a desired field of view and the combined signal from an undesired field of view received in accordance with the maximized performance metric. - View Dependent Claims (57)
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Specification