Subreflector shaping to improve multiple-beam performance of a Cassegrain antenna |
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Authors: | Hay S.G. |
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Affiliation: | CSIRO, Division of Radiophysics, Epping, Australia; |
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Abstract: | A method of designing multiple-beam antennas based on shaping the subreflector of an offset Cassegrain antenna is described. It is applied to a compact system having a diameter of 300? that is required to produce beams up to 4-6°either side of boresight. The performance is shown to be only slightly less than that obtainable by also shaping the main reflector, indicating that efficient multiple-satellite-access antennas can be designed without specially shaped main reflectors. |
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