Technical Article

Broadband Design of a High Efficiency 200-W GaN HEMT Doherty Amplifier

This article describes a multi-band Doherty amplifier design that was achieved using Microwave Office software broadband matching techniques and circuit simulation of the individual amplifier components. Careful attention to the frequency response of the in-package and on-board transformation networks, as well as application of the most appropriate Doherty architecture for the available transistor/package characteristics, enabled the design to achieve its excellent broadband performance.

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