GaN数字功率放大器技术进展  

Technical Progress of GaN Digital Power Amplifier

作　　者：高媛 单月晖 罗卫军[2,3] GAO Yuan;SHAN Yuehui;LUO Weijun(Center of Military Commission Equipment Development Department,Beijing 100032,P.R.China;Institute of Microelec.,Chinese Academy of Sci.,Beijing 100029,P.R.China;Univ.of Chinese Academy of Sci.,Beijing 100049,P.R.China)

机构地区：[1]军委装备发展部,北京100032 [2]中国科学院微电子研究所,北京100029 [3]中国科学院大学,北京100049

出　　处：《微电子学》2021年第6期778-785,共8页Microelectronics

基　　金：国家自然科学基金重点项目(61631021)。

摘　　要：峰均比的持续增大使得无线通讯终端需要更高功率、更高效率、更高频率的功率放大器,而现有模拟功放作为基站全数字化最后一道屏障,其效率和输出功率不足以满足现在无线通讯的需求。GaN数字功率放大器作为一种工作在开关状态的数字功放,具备高输出功率、高速、高效率的优势,是实现全数字化基站的关键之一。GaN数字功放在高峰均比输入时仍能以较高效率工作,从而弥补模拟功放在高峰均比输入时效率下降的不足。文章简述了GaN数字功率放大器的工作原理,总结了近期国内外技术进展及其面临的挑战,阐述了未来GaN数字功率放大器的发展和优化方向。The continuous increase of peak-to-average power ratio(PAPR) makes the wireless communication terminals require power amplifiers with higher power, efficiency, and frequency. The existing analog power amplifier was the last barrier for the fully digital base station, of which efficiency and output power were insufficient to meet the needs. With the merits of high output power, speed and efficiency, GaN digital power amplifier operating at switching mode, was one of the keys to realize digital base station. The GaN digital power amplifier could still operate at a higher efficiency even for the input with high PAPR to make up for the lack of efficiency of analog power amplifier at the same situation. This paper outlined the working principle of the GaN digital power amplifier, summarized recent technological advances and challenges at home and abroad, and described the future development and optimization of the GaN digital power amplifier.

关 键 词：氮化镓基 数字功率放大器 开关模式 D类 包络跟踪 

分 类 号：TN722[电子电信—电路与系统]