Sub-diffraction limit resolution radar arrays
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United States of America Patent
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Mar 13, 2018
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N/A
app pub date -
Jan 8, 2015
filing date -
Jan 10, 2014
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Abstract
A phased array radar configured to transmit two or more slightly misaligned beams, for improved angular resolution. The transmitting array is split into two or more subarrays that transmit slightly misaligned beams that may have a common carrier frequency and each of which has a different modulation. Each subarray may include alternate elements in the rows of the transmitting array, and alternate elements in the columns of the transmitting array. The width of each transmitted beam may be greater than or comparable to the diffraction-limited width, but the region in which the beams overlap may be significantly narrower than any of the transmitted beams. The reflected beam from a target contains one or more of the modulations of the transmitted beams, in proportions depending on the location of the target, and the extent to which it is illuminated by each beam.
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