Patent ID: 9413306
Filing Date: 2016-08-09
CPC Classification: H03F

Claim Text:
1. A method of calibrating a multiport amplifier comprising a plurality of input ports, a plurality of power amplifiers linked to the plurality of input ports by way of a matrix for distributing signals, and a plurality of output ports linked to the plurality of power amplifiers by way of a matrix for recombining signals, the matrices for distributing and recombining signals being adapted for dividing a signal present at an input port between a plurality of the power amplifiers and for recombining the signal, amplified, at a level of an output port, an element for weighting the signals being associated with each power amplifier; wherein the method comprises: a) determining a normalized mean cross-correlation between an output signal present at the output port, taken as reference, and signals present at the other output ports; and b) iteratively adjusting weights of the weighting elements to minimize the normalized mean cross-correlation or to render it less than a predetermined threshold; wherein the weights are complex weights, each weight comprising a modulus and a phase, wherein step b) further comprises: b1) iteratively adjusting the phases of the weights; and b2) iteratively adjusting the moduli of the weights; and wherein the steps b1) and b2) are implemented successively, in an arbitrary order, and wherein step b1) further comprises successive adjusting of the phases of the weights of the weighting elements associated with the power amplifiers; and wherein step b2) further comprises successive adjusting of the moduli of the weights of the weighting elements associated with the power amplifiers.