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Optimal discrete-amplitude excitations for arrays feeding a parabolic antenna receiving from off-axis satellites

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4 Author(s)
Rodriguez Gonzalez, J.A. ; Dept. of Appl. Phys., Santiago de Compostela Univ., Spain ; Pino, A.G. ; Rubinos Lopez, J.O. ; Ares Pena, F.

One relatively inexpensive setup for domestic reception of signals from two or more satellites is to use a conventional offset parabolic reflector fed by suitably placed off-axis arrays. In this paper, we show that the peak gain attainable using arrays with element-excitation amplitudes restricted to two or three values provided by a cascade of 3 dB power dividers can be as little as a few tenths of a decibel lower than that of arrays with unrestricted excitations. the optimum excitations are synthesized by a simulated annealing and downhill simplex optimization method.

Published in:

Antennas and Propagation Magazine, IEEE  (Volume:45 ,  Issue: 3 )

Date of Publication:

June 2003

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