高效率Doherty功率放大器的设计  

Design of High Efficiency Doherty Power Amplifier

作　　者：包昊 轩雪飞 王杨 薛淼 沈晓波 葛先雷 赵旺 BAO Hao;XUAN Xuefei;WANG Yang;XUE Miao;SHEN Xiaobo;GE Xianlei;ZHAO Wang(School of Electronic Engineering,Huainan Normal University,Huainan 232038,China)

机构地区：[1]淮南师范学院电子工程学院,安徽淮南232038

出　　处：《宁波工程学院学报》2023年第1期16-20,共5页Journal of Ningbo University of Technology

基　　金：淮南市指导性科技计划项目(2021001)资助;淮南市科技计划项目(2021A2411)资助;淮南师范学院校级科学研究项目(2021XJYB026)。

摘　　要：针对传统Doherty功放效率低下的问题,将谐波控制理论和Doherty理论进行结合,提出了一种新型拓扑结构。该结构能够实现对所有高次谐波的控制,能将偶次谐波匹配到短路终端、奇次谐波匹配到开路终端。同时,使用高频仿真软件进行电路的拓扑结构建模,对设计完成的功放进行验证。仿真结果表明:在1.6~1.9 GHz的频率范围内,低功率状态时,漏极效率介于61.5%~69.0%之间,输出功率为38.0~41.5 dBm,大信号增益大于15 dB;高功率状态时,漏极效率为介于64.5%~72.0%之间,输出功率为40~43 dBm,大信号增益大于10 dB。Aiming at the low efficiency of traditional Doherty PA,a new topology is proposed by combining harmonic tuned theory with Doherty theory,which can manipulate all harmonics,that is,the impedance of even harmonics is matched to zero,odd harmonics to infinite.Then,the topology of the circuit is modeled by using high-frequency simulation software to verify the designed PA.The final simulation results show that in the frequency range of 1.6~1.9 GHz,in the low power state,the drain efficiency is 61.5%~69.0%,the output power is 38.0~41.5 dBm,and the large signal gain is greater than 15 dB;in the high power state,the drain efficiency is 64.5%~72.0%,the output power is 40~43 dBm,and the large signal gain is greater than 10 dB.

关 键 词：DOHERTY 功率放大器 高效率 谐波调节 

分 类 号：TN454[电子电信—微电子学与固体电子学]