RECONFIGURABLE ZONAL BEAM CONFORMATION SYSTEM FOR ORBIT SATELLITE ONBOARD ANTENNA AND METHOD OF OPTIMIZING RECONFIGURATION

摘要

The beamforming system according to the invention comprises, in cascade, a signal distributor (SP) applying, on each channel, signals of equal amplitude, first adjustable phase-shifters (PHI1-PHI4) and amplifiers ( Amp1-AMP4) and a Butler matrix (FCN) whose outputs are connected via second adjustable phase shifters (PHI'1-PHI'4) to the radiation source elements of the antenna (S1-S4). The relative adjustment of the phase shifts introduced by the first (PHI1 - PHI4) phase shifters makes it possible to reconfigure the emitted beam, while optimizing this reconfiguration. In a preferred embodiment, the system further comprises variable attenuators (At1 -At4). A control device (P) makes it possible to apply optimization parameters. The object of the invention is also a method for optimizing the reconfiguration, in particular using a gradient search algorithm. / P