A dual offset shaped reflector for elliptical beams

Presents the design techniques for dual offset shaped reflectors, with special emphasis on sidelobe and cross polar performance. The method is systematic and not based on ad hoc assumptions. The principles of the method are described, with an outline of the numerical solution technique included. A specific design of which a breadboard model has been manufactured, integrated and tested as part of an INTELSAT R&D study, is evaluated where the importance of choosing the right analysis method and as accurate input data as possible is demonstrated by comparing analysis and measurements. This provides the basis for using the same method in the design of the two Ku-band spot beam antennas, S1 and S2, on the INTELSAT VIII series spacecraft, which is currently being built by GE Astro Space, with DASA and TICRA as sub-contractors for the spot beam antennas.<
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