Beamforming for spatial sidelobe cancellation and AMR direction finding
First Claim
Patent Images
1. An apparatus comprising:
- an array of antenna elements including a center element and a plurality of other elements symmetrically positioned with respect to the center element;
a beamformer for adjusting signals to and from the plurality of other elements to form a first beam pattern;
a sum element for adding signals from the beamformer and the center element to form a sum pattern; and
a difference element for subtracting signals from the beamformer and the center element to form a null pattern including a null aligned with a boresight of the array of antenna elements, and an omni-like pattern on opposite sides of the boresight.
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Abstract
An apparatus comprising an array of antenna elements, a beamformer for adjusting signals to and from the elements to form a first beam pattern and a second beam pattern, and wherein the first beam pattern is a sum pattern and the second beam pattern is a null pattern. A method of beamforming for sidelobe cancellation is also provided.
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Citations
20 Claims
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1. An apparatus comprising:
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an array of antenna elements including a center element and a plurality of other elements symmetrically positioned with respect to the center element; a beamformer for adjusting signals to and from the plurality of other elements to form a first beam pattern; a sum element for adding signals from the beamformer and the center element to form a sum pattern; and a difference element for subtracting signals from the beamformer and the center element to form a null pattern including a null aligned with a boresight of the array of antenna elements, and an omni-like pattern on opposite sides of the boresight. - View Dependent Claims (6, 7, 8, 9)
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2. (canceled)
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3. (Canceled)
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11. A method of beamforming for sidelobe cancellation, the method comprising:
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providing an array of antenna elements including a center element and a plurality of other elements symmetrically positioned with respect to the center element; using a beamformer to adjust signals to and from the plurality of other elements to form a first beam pattern; adding signals from the beamformer and the center element to form a sum pattern; and
subtracting signals from the beamformer and the center element to form a null pattern including a null aligned with a boresight of the array of antenna elements, and an orrni-like pattern on opposite sides of the boresight. - View Dependent Claims (15, 17)
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12. (canceled)
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Specification