Being Seventy-Five Still Young: The Doherty Power Amplifier

摘要

In this article, the evolution of the Doherty Power Amplifier (DPA) through its first seventy-five years is presented. The aim is to explain why this architecture is still used to realize very advanced power amplifier stages for wireless systems. To this purpose, a review of the DPA principle of operation, together with a benchmark of the state of the art results, realization methods and fields of application, is reported.