PROJECT TITLE :
Deriving an Optimum Mapping Function for the SKA-Shaped Offset Gregorian Reflectors
Of primary importance for a radio telescope is its receiving sensitivity. The offset Gregorian reflector antennas, as used for the Square Kilometer Array (SKA) radio telescope, will be shaped to form economical use of the reflector’s aperture and thus to maximize sensitivity for a given sidelobe level. The form of the reflector is controlled by a mapping function. This paper presents a method to derive the optimum mapping operate given a specific set of single pixel feeds. In this case, the feeds were optimized for a geometrically similar classical conic section (unshaped) reflector system. Realistic performance results are given for reflector systems with numerous subreflector sizes, extensions, and subtended angles.
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