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Improve Doherty Amplifier in efficiency and output power

The Doherty Amplifier is used in an increasing number of radio transmitter applications to improve energy efficiency. There are numerous ways to build the Doherty PA. This article begins with an overview of Linearization and Efficiency Enhancement and against that backdrop, highlights the associated challenges and some of the numerous solutions. Finally, an alternative design flow supported with a case study, which provides the engineer with a novel insight into their design, enabling them to achieve the best performance-cost compromise.