A Linear and Efficient Doherty PA at 3.5 GHz

In this work, a very good match between simulations and measurements of a Doherty PA was observed. To the best of authors´ knowledge, the achieved results demonstrated the highest performance in terms of two-tone efficiency at high linearity that can be found in literature. With this simulation-based design, the possibility of successfully achieving a desired performance in practice, even in terms of linearity, has been demonstrated for a multipath PA architecture. That was possible due to the thorough design procedure followed, with special attention to robustness of the design and critically due to the availability of accurate transistor models, which are ultimately needed for next-generation PA designs (e.g., load modulated architectures).