Phased array antenna having sub-arrays
First Claim
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1. A phased array antenna comprising:
- a plurality of rectangular sub-arrays each including the same number of individual array elements, each of the plurality of rectangular sub-arrays having a phase center, the plurality of rectangular sub-arrays tiled in a plane to provide aperiodicity of the phase centers,wherein the plurality of rectangular sub-arrays include at least a first plurality of rectangular sub-arrays having the individual array elements thereof arranged in a first arrangement, a second plurality of rectangular sub-arrays having the individual array elements thereof arranged in a second arrangement, and a third plurality of rectangular sub-arrays having the individual array elements thereof arranged in a third arrangement, each of the first, second and third arrangements providing a different relative sub-array phase center location than the other arrangements, the third arrangement having different sub-array dimensions than the first and second arrangements.
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Abstract
An antenna for a phased array comprises a plurality of rectangular sub-arrays of individual array elements. The rectangular sub-arrays in the plurality are tiled to reduce periodicity of phase centers of the sub-arrays. The antenna utilizes a phase shifter for each sub-array as opposed to using a phase shifter with each individual array element.
10 Citations
24 Claims
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1. A phased array antenna comprising:
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a plurality of rectangular sub-arrays each including the same number of individual array elements, each of the plurality of rectangular sub-arrays having a phase center, the plurality of rectangular sub-arrays tiled in a plane to provide aperiodicity of the phase centers, wherein the plurality of rectangular sub-arrays include at least a first plurality of rectangular sub-arrays having the individual array elements thereof arranged in a first arrangement, a second plurality of rectangular sub-arrays having the individual array elements thereof arranged in a second arrangement, and a third plurality of rectangular sub-arrays having the individual array elements thereof arranged in a third arrangement, each of the first, second and third arrangements providing a different relative sub-array phase center location than the other arrangements, the third arrangement having different sub-array dimensions than the first and second arrangements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A phased array antenna comprising:
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a plurality of phased array antenna components, each of the phased array antenna components comprising; a plurality of rectangular sub-arrays each including the same number of individual array elements, the plurality of rectangular sub-arrays tiled in a plane to provide aperiodicity of phase centers of the plurality of sub-arrays, wherein the plurality of rectangular sub-arrays include at least a first plurality of rectangular sub-arrays having the individual array elements thereof arranged in a first arrangement, a second plurality of rectangular sub-arrays having the individual array elements thereof arranged in a second arrangement, and a third plurality of rectangular sub-arrays having the individual array elements thereof arranged in a third arrangement, each of the first, second and third arrangements providing a different relative sub-array phase center location than the other arrangements, the third arrangements having different sub-array dimensions than the first and second arrangements, wherein at least one of the phased array antenna components provides a different tiling pattern of rectangular sub-arrays within the phased array antenna than the other phased array antenna components. - View Dependent Claims (19, 20)
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21. A phased antenna array, comprising:
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a square periodic grid of individual array elements that are grouped into a plurality of rectangular sub-array groups that each have a respective phase center, the rectangular sub-array groups being tiled within the square periodic grid such that each of the phase centers are located at a respective intersection of one of a first plurality of parallel axes and one of a second plurality of parallel axes that are perpendicular to the first plurality, the first plurality of parallel axis on which phase centers are located being greater than the second plurality of parallel axes on which phase centers are located, and the plurality of rectangular sub-array groups include at least a first plurality of rectangular sub-array groups having the individual array elements thereof arranged in a first arrangement, a second plurality of rectangular sub-array groups having the individual array elements thereof arranged in a second arrangement, and a third plurality of rectangular sub-array groups having the individual array elements thereof arranged in a third arrangement, each of the first, second and third arrangements providing a different relative sub-array phase center location than the other arrangements, the third arrangement having different sub-array dimensions than the first and second arrangements. - View Dependent Claims (22, 23, 24)
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Specification