Circularly symmetric, zero redundancy, planar array having broad frequency range applications
AssigneeThe Boeing Company
InventorJames R. Underbrink
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Abstract
A class of planar arrays having broad frequency range applications for source location, source imaging or target illumination with projected beams is described in this disclosure. The non-redundant arrays are circularly symmetric and made up of a plurality of sensing and/or transmitting elements arranged so as to substantially eliminate grating lobes for a broad range of frequencies. Signals received from or transmitted to the elements are appropriately phased to control the beam of the array.
Claims18
A broad frequency range circularly symmetric zero redundancy planar array for eliminating grating lobe contamination in source maps or projected beams comprising a plurality of sensing elements or transmitting elements spaced with various radii along a family of identical logarithmic spirals where members of the family are uniformly spaced in angle about an origin point and there are an odd number of members in the said family of identical logarithmic spirals.
Dependencies are inferred from the claim text.