Design and analysis of large-power RF amplifier circuit with high efficiency based on Doherty technology

Based on Doherty technology which improves the efficiency of amplifiers evidently, a design scheme of large-power amplifier is presented in this paper.MRF23410 chips and the software such as Pspice, Protel, ADS are applied to realization of modules including DC bias circuit, protection circuit, matching and filter circuit, load-pull circuit and RF amplifier circuit.Simulation results of system gain, efficiency, current distribution and return loss are provided at last.