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提出一种非均衡堆叠的Doherty功率放大器，载波放大器采用共源拓扑，峰值放大器采用N堆叠拓扑，通过理论确定的四分之一波长线提高回退效率。在24-28GHz频段实现5G NR 64-QAM OFDM 100MHz信号下平均功率超过15.8dBm，平均PAE超过16.9%。
Abstract This paper proposes an unequal-stacked Doherty power amplifier. The proposed Doherty structure consists of a common-source topology for the carrier amplifier and an N-stacked topology for the peaking amplifier with a theoretically determined quarter-wave line. Thanks to the proposed Doherty structure, the back-off efficiency is enhanced. With a 5G NR 64-QAM OFDM 100MHz signal, the Pavg and PAEavg exceed 15.8dBm and 16.9%, respectively, from 24 to 28GHz with the EVM of -25dB. Phase arrays are essential for millimeter-wave (mm-wave) cellular systems, enabling high equivalent isotropic radiated power (EIRP) for wide coverage. Since a significant number of power amplifiers (PAs) are integrated into a phased-array IC, it is crucial that these PAs are compact, highly efficient, and have high output power to minimize overall power consumption and chip area [1]. Numerous studies have been reported on these aspects
Seungwon Park, Jooseok Lee, Seungjae Baek, Taewan Kim, Yifei Chen, Sehyug Jeon, Sung-gi Yang
Samsung Electronics, Seoul, Korea