Log-periodic lattice for an antenna array
AssigneeThe Aerospace Corporation
InventorMark J. LANGE
Life of this patent
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Abstract
An array lattice for a low-density array includes a plurality of antenna elements. Each pair of the plurality of antenna elements are spaced such that each pair of the plurality of antenna elements have different spacing. Furthermore, each pair of the plurality of antenna elements has a grating lobe steered to a different angle while a main beam is the only beam that is coherently combined by each pair of the plurality of antenna elements. The array lattice results in grating lobe rejection that is directly proportional to the number of antenna elements.
Claims20
An array lattice for a low-density array, comprising:
- a plurality of antenna elements, wherein each pair of the plurality of antenna elements are spaced such that each pair of the plurality of antenna elements have differential spacing, wherein each pair of the plurality of antenna elements have a grating lobe steered to a different angle while a main beam is the only beam that is coherently combined by each pair of the plurality of antenna elements.
An array lattice for a low-density array, comprising:
- a plurality of antenna elements, wherein each pair of the plurality of antenna elements are spaced such that each pair of the plurality of antenna elements have differential spacing, wherein each pair of the plurality of antenna elements have a grating lobe steered to a different angle while a main beam is the only beam that is coherently combined by each pair of the plurality of antenna elements;
- and
- antenna element spacing in a center of the array lattice is smaller compared to antenna elements spacing in other areas of the array lattice to produce an array of antenna elements from the plurality of antenna elements have a higher density in the center and a constantly reducing density towards edges of the array lattice.
An array lattice for a low-density array, comprising:
- a plurality of antenna elements, wherein each pair of the plurality of antenna elements are spaced such that each pair of the plurality of antenna elements have differential spacing, wherein the differential spacing is based on a Tau factor ranging from 1.1 and 1.3, and
- each pair of the plurality of antenna elements have a grating lobe steered to a different angle while a main beam is the only beam that is coherently combined by each pair of the plurality of antenna elements.
Dependencies are inferred from the claim text.