Antenna arrays formed of spiral sub-array lattices
First Claim
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1. An array antenna comprising:
- a plurality of sub-arrays each one of the plurality of sub-arrays further comprising antenna elements; and
wherein the antenna elements of each of the plurality of sub-arrays are configured in a spiral orientation with respect to a center of the sub-array.
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Abstract
A antenna array (20) includes a plurality of periodic or aperiodic arranged sub-arrays (22). Each sub-array (22) includes a plurality of antenna elements (32) arranged in the form of a spiral (30). The sub-arrays (22) can comprise various spiral shapes to provide the required physical configuration and operational parameters to the antenna array (20). The elements (32) of each sub-array (22) are arranged to minimize the number of such elements (32) that intersect imaginary planes perpendicular to the spiral and passing through the spiral center. Such an orientation of the elements (32) minimizes grating lobes in the antenna pattern.
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Citations
41 Claims
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1. An array antenna comprising:
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a plurality of sub-arrays each one of the plurality of sub-arrays further comprising antenna elements; and
wherein the antenna elements of each of the plurality of sub-arrays are configured in a spiral orientation with respect to a center of the sub-array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An array antenna providing a plurality of radiation beam patterns, comprising:
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a plurality of sub-arrays; and
wherein the each one of the plurality of sub-arrays comprises a first group of antenna elements configured in a first spiral orientation nested among a second group of antenna elements configured in a second spiral orientation, and wherein the first group of antenna elements are selected to provide a first radiation beam pattern and wherein the second group of antenna elements are selected to provide a second radiation beam pattern. - View Dependent Claims (32, 33, 34)
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35. A multiple-band array antenna comprising:
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a plurality of sub-arrays;
wherein a first plurality of antenna elements of each sub-array are configured in a first spiral orientation; and
wherein a second plurality of antenna elements of each sub-array are configured in a second spiral orientation nested within the first spiral orientation, and wherein the first plurality of antenna elements are configured to operate at a first frequency, and wherein the second plurality of antenna elements are configured to operate at a second frequency. - View Dependent Claims (36, 37)
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38. A phased array antenna comprising:
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a plurality of sub-arrays each comprising a plurality of antenna elements; and
wherein the antenna elements of each one of the plurality of sub-arrays are configured in a spiral orientation, and wherein the spiral orientation comprises positioning the antenna elements to minimize the number of antenna elements that are intersected by imaginary planes perpendicular to the plane of the sub-array and passing through the spiral center.
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39. An antenna, comprising:
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a plurality of antenna elements arranged in a spiral orientation; and
wherein the spiral orientation comprises positioning the plurality of antenna elements to minimize the number of antenna elements that are intersected by imaginary planes perpendicular to the plane of the antenna and passing through the spiral center.
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40. An antenna comprising:
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a plurality of sub-arrays each comprising a plurality of antenna elements configured in a spiral orientation, wherein the spiral orientation comprises positioning the plurality of antenna elements to minimize the number of antenna elements that are intersected by imaginary planes perpendicular to the plane of the antenna and passing through the spiral center point; and
wherein the plurality of sub-arrays are arranged in a three-dimensional configuration.
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41. A method for orienting a plurality of antenna elements to reduce grating lobes in the radiation pattern of the plurality of antenna elements, comprising:
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arranging the plurality of elements in a spiral configuration;
passing a plurality of imaginary planes perpendicular to the plane of the spiral and passing through the spiral center; and
minimizing the number of the plurality of elements intersecting each one of the plurality of imaginary planes.
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Specification