Patent ID: 9124217
Filing Date: 2015-09-01
Classification: H03F

Abstract:
1. A power amplifier comprising: a plurality of primary amplifying channels arranged to each receive an input signal from one or more signal sources for generating a primary amplified output in each of the plurality of primary amplifying channels; a secondary amplifying channel in communication with the one or more signal sources wherein the secondary amplifying channel is arranged to receive one or more signal components each associated with the input signal received by each of the plurality of primary amplifying channels to form a merged input signal for generating a secondary amplified output; and an electric junction arrangement being in electrical communication with the primary amplified output of each of the primary amplifying channels and the secondary amplified output of the secondary amplifying channel; wherein signals from the signal sources are each divided by a distribution component to form the input signal in one of the plurality of primary amplifying channels and the signal component received by the secondary amplifying channel; wherein each of the primary amplifying channels comprises: wherein the secondary amplifying channel comprises: wherein only the carrier amplifiers are operative when the signals from the signal sources are of low power; wherein the peaking and carrier amplifiers are operative when the signals from the signal sources are of high power; wherein the one or more signal components received by the secondary amplifying channel are merged by a 180° hybrid coupler arranged to form the merged input signal.