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The focal plane coherence function of an imaging antenna and its use in measuring and correcting aberrations
Author(s) -
Cornwell T. J.,
Napier P. J.
Publication year - 1988
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs023i005p00739
Subject(s) - optics , coherence (philosophical gambling strategy) , reflector (photography) , interferometry , aperture (computer memory) , cardinal point , diffraction , side lobe , physics , coherence length , main lobe , antenna (radio) , computer science , telecommunications , acoustics , light source , superconductivity , quantum mechanics
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. We show that by measuring the focal plane coherence function, the aberrations in reflector antennas can be corrected similarly, and true diffraction limited images obtained.