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