DISTRIBUTED RF POWER AMPLIFIER WITH LOAD COMPENSATION

摘要

A radio frequency power amplifier circuit according to certain embodiments of the present invention uses a distributed radio frequency amplifier (110) having a plurality of stages each with an input. The distributed radio frequency amplifier (110) drives an output load, such as an antenna (114). A drive signal synthesizer (106), having a plurality of outputs, drives the plurality of inputs to the distributed amplifier (110). Changes in load impedance are measured, e.g., using a directional coupler (160), and the measurement is used to change a drive signal produced by the drive signal synthesizer (106) to compensate for the change in load impedance.