IMAGING ANTENNA SYSTEMS WITH COMPENSATED OPTICAL ABERRATIONS BASED ON UNSHAPED SURFACE REFLECTORS
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United States of America Patent
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Issued Date -
Dec 22, 2016
app pub date -
Mar 5, 2014
filing date -
Mar 5, 2014
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Abstract
An offset imaging antenna system with compensated optical aberrations comprises a main a paraboloid reflector, a first paraboloid sub reflector, and a first feeding array as an arrangement of first feed array elements to illuminate or to be illuminated by the first sub reflector. The main reflector and the first sub reflector are confocal by sharing a common focal point. The first feeding array has a curved shape that corresponds to a first equivalent array of magnified image feed elements lying on a plane crossing the main optical centre and perpendicular to the main bore-sight axis, all the first feed array elements being positioned as to provide a planar distribution of the positions of the image feed elements onto the first equivalent array after a second reflection by the main reflector with a central image point coinciding with the main reflector optical centre under a maximum illumination condition.
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