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Optimisation of contoured beams for satellite antennas

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2 Author(s)
Patel, P.D. ; Spar Aerospace Ltd., Antenna Engineering, Ste. Anne de Bellevue, Canada ; Chan, K.K.

One of the basic problems of realising an optimum contoured beam, together with sidelobe suppression, is the determination of the excitation coefficients for the individual horns of a reflector and horn-array geometry. The Fletcher-Powell and the Minimax methods of optimising an arbitrary coverage with sidelobe suppression have been studied. The paper presents the formulations applicable to the Fletcher-Powell and the Minimax methods. The Brasilsat antenna is used as the test case. Results obtained using the two methods, and also by manual optimisation, are presented and compared.

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Microwaves, Antennas and Propagation, IEE Proceedings H  (Volume:132 ,  Issue: 6 )