基于开关多模式的Doherty射频功率放大器设计  

Design of a switch-controlled multi-mode Doherty power amplifier

作　　者：蔡俊祺 卜刚[1] Cai Junqi;Bu Gang(College of Integrated Circuits,College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学电子信息工程学院集成电路学院,江苏南京211100

出　　处：《电子技术应用》2022年第7期105-109,113,共6页Application of Electronic Technique

摘　　要：在工作频率为2.4 GHz的背景下,基于所设计的Doherty功率放大器,设计了一种改进的多模开关控制和包络跟踪调制的Doherty功率放大器。设计中使用的电子管是Renesas的GaAs晶体管NE6510179A。设计的Doherty峰值输出(32.0 dBm)时功率附加效率达到27.2%,回退6 dB时的功率附加效率为27.0%。在与搭建的包络跟踪模型级联改进后,新结构对低输出功率的功率附加效率有一定程度的改善,在中高输出功率部分的线性度有较大的改善。In the background of the operating frequency of 2.4 GHz,based on the designed Doherty power amplifier,an improved Doherty power amplifier with multi-mode switch control and envelope tracking modulation is designed.The tube used in this design is a GaAs transistor NE6510179A from Renesas.The power added efficiency of the designed Doherty peak output(32.0 dBm)reaches 27.2%,and the power added efficiency of the back-off 6 dB is 27.0%.After being improved in cascade with the built envelope tracking model,the new structure can improve the power added efficiency of low output power to a certain extent,and the linearity in the middle and high output power part has been greatly improved.

关 键 词：射频功率放大器 Doherty结构 功率附加效率 线性度 

分 类 号：TN92[电子电信—通信与信息系统]