⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种用于极性发射机的两相开关混合电源调制器，通过结合线性放大器和开关放大器，解决了传统电源调制器在低功率下效率低、开关损耗高的问题，实现了9%的效率提升。
Emerging polar transmitters for highly efficient and linear power amplifiers (PAs) demand for high-efficiency, high-bandwidth and low-ripple supply modulators. In [1], a linear regulator is used; however, its efficiency is low at low power levels. A switched-mode power supply (SMPS) is used in [2]; but the high switching loss due to high switching frequency (necessary for high bandwidth) limits the maximum efficiency to ~76%. A hybrid amplifier (HA) topology combining both linear amplifier (LA) and switching amplifier (SA) is used in some recent work [3, 4]. In this topology, a high-bandwidth LA replicates the input envelope voltage Vin at its output Vo; while the high-efficiency SA supplies most of the load current within its bandwidth. Yet, the tracking bandwidth is finite in [3]; and the LA in [4] needs to supply most of the high-frequency load current due to the exceptionally large inductor (20µH) used for realizing small output ripple; and
Ying Wu, Philip K.T. Mok
Hong Kong University of Science and Technology, Kowloon, Hong Kong