The focal plane coherence function of an imaging antenna and its use in measuring and correcting aberrations

Details The focal plane coherence function of an imaging antenna and its use in measuring and correcting aberrations The focal plane coherence function of an imaging antenna and its use in measuring and correcting aberrations

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988rasc...23..739c&link_type=abstract

Radio Science (ISSN 0048-6604), vol. 23, Sept.-Oct. 1988, p. 739-748.

Physics

12

Aberration, Error Correcting Devices, Focal Plane Devices, Reflector Antennas, Coherent Radiation, Electric Fields, Phased Arrays

Scientific paper

Large reflector antennas are typically limited in efficiency and side lobe level by small errors in the reflector profile. Interferometric arrays suffer from an analogous problem, which can be corrected by the 'self-calibration' technique by exploiting redundant sampling of the aperture plane coherence function. It is shown that, by measuring the focal plane coherence function, the aberrations in reflector antennas can be corrected similarly, and true diffraction-limited images obtained.

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