Power amplifier

摘要

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.

主权项

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:
a carrier amplifier arranged to generate the primary amplified output in response to the input signal; anda transformer component having an impedance ZT arranged to modulate a load impedance at different power levels; andeach of the carrier amplifiers are further associated with an output matching network and offset lines arranged to match the load impedance; and wherein the secondary amplifying channel comprises:
a phase adjustment component having an impedance Zo arranged to adjust a phase of the merged input signal; anda peaking amplifier arranged to generate the secondary amplified output in response to the merged input signal; 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.