This paper addresses the critical weakness of the conventional Doherty Power Amplifier when targeting wideband and deep back-off operation. A load modulation network with a good trade-off between complexity and performance enhancement is proposed for broadband operation around 9-dB back-off. As an initial assessment, its effectiveness in enhancing the performance in broadband operation has been proven using linear simulations.

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Challenges of 9-dB Back-Off Doherty Power Amplifiers with 20% Fractional Bandwidth

  • Zhifan Zhang,
  • Anna Piacibello,
  • Vittorio Camarchia

摘要

This paper addresses the critical weakness of the conventional Doherty Power Amplifier when targeting wideband and deep back-off operation. A load modulation network with a good trade-off between complexity and performance enhancement is proposed for broadband operation around 9-dB back-off. As an initial assessment, its effectiveness in enhancing the performance in broadband operation has been proven using linear simulations.