METHOD OF CALIBRATING A MULTIPORT AMPLIFIER, MULTIPORT AMPLIFIER ALLOWING THE IMPLEMENTATION OF SUCH A METHOD, AND SATELLITE COMPRISING SUCH AN AMPLIFIER

摘要

A method of calibrating a multiport amplifier comprising a plurality of input ports, a plurality of power amplifiers linked to input ports by a matrix distributing signals, a plurality of output ports linked to the power amplifiers by a matrix recombining signals and a plurality of elements for weighting the signals associated with the power amplifiers, comprises: determining a normalized mean cross-correlation between an output signal present at the output port, taken as reference, and the signals present at the other output ports; and iteratively adjusting weights of the weighting elements so as to minimize the normalized mean cross-correlation or to render it less than a predetermined threshold. A multiport amplifier comprising a calibration module configured or programmed to implement such a calibration method, and a satellite for telecommunications whose payload comprises such a multiport amplifier, are also provided.

主权项

1. A method of calibrating a multiport amplifier comprising a plurality of input ports, a plurality of power amplifiers linked to said input ports by way of a matrix for distributing signals and a plurality of output ports linked to said power amplifiers by way of a matrix for recombining signals, said matrices for distributing and recombining signals being adapted for dividing a signal present at a said input port between a plurality of said power amplifiers and for recombining said signal, amplified, at the level of a said output port, an element for weighting the signals being associated with each said power amplifier;
wherein said method comprises the steps of:a) determining a normalized mean cross-correlation between an output signal present at a said output port, taken as reference, and the signals present at the other said output ports; andb) iteratively adjusting weights of said weighting elements so as to minimize said normalized mean cross-correlation or to render it less than a predetermined threshold.