RF power amplifier system employing AC-DC power supplies and RF combining

摘要

An RF power amplifier system is presented herein and it includes an RF source that provides an RF carrier signal having a given RF carrier frequency. An RF amplifier module amplifies the carrier signal and this module includes first and second RF amplifiers having a common input to receive a turn on signal that turns on both amplifiers and wherein the outputs of the amplifiers are coupled together in parallel. A controller supplies a turn on signal to the common input to turn on the first and second amplifiers. A first AC to DC supply provides a first DC operating voltage obtained from a first multiphase AC supply and applies this to the amplifier module and wherein the first DC voltage exhibits a ripple frequency dependent upon the number of phases in the first multiphase supply. Also, a second AC to DC supply is provided for supplying a second DC operating voltage from a second multiphase AC supply to the RF amplifier module and wherein the second DC operating voltage exhibits a ripple frequency dependent upon the number of phases in the second multiphase supply.