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本文提出了一种适用于5G大规模MIMO系统的28/37/39GHz多频段线性Doherty功率放大器。通过多频段匹配和线性化技术，该PA在多个频段实现了高效率和良好线性度，解决了毫米波多频段通信中功率放大器效率和线性度折中的难题。
Millimeter-wave fifth-generation (5G) systems will extensively leverage massive multiple-input multiple-output (MIMO) architectures to improve their link performance. These array systems will employ many power amplifiers (PAs) operating at moderate output power (Pout), e.g., 16 PAs each with +7dBm Pout [1]. The PA energy efficiency is of paramount importance in MIMO systems for improved battery life and thermal management. Due to spectrum-efficient modulations with high peak-to-average power ratios, both PA peak efficiency and power back-off (PBO) efficiency are critical. To achieve 5G Gb/s data-rates with complex modulations, envelope tracking PAs require high-speed/high-precision supply modulators, and outphasing PAs need high-speed baseband computation, both of which pose substantial challenges in practice. Although Doherty PAs support high data-rates, existing silicon mm-wave Doherty PAs exhibit very
Song Hu, Fei Wang, Hua Wang
Georgia Institute of Technology, Atlanta, GA