第4期2023年8月Vol.21No.4August2023雷达科学与技术RadarScienceandTechnologyDOI:10.3969/j.issn.1672⁃2337.2023.04.015C波段全集成GaNMMICDoherty功率放大器设计王金婵，张盼盼，王德勇，张金灿，刘敏，刘博（河南科技大学电气工程学院，河南洛阳471023）摘要：采用0.25μm氮化镓高电子迁移率晶体管（GaNHEMT）工艺设计了一种全集成单片微波集成电路（MMIC）多尔蒂（Doherty）功率放大器（DPA）。采用了新型的拓扑结构，去除了传统DPA中主路放大器的阻抗变换器以及两路合成后的阻抗转换器，直接在主路输出匹配网络（OMN）中实现饱和点和回退点的阻抗的转换，采取适当的阻抗，与传统电路相比，降低了阻抗转换率，拓宽了频带。此外功率分配器也采用了新颖的拓扑结构，减少了元器件的使用，并且在DPA的匹配网络中使用集总电感的电容降低版图的面积。设计了一款工作在4.6~5.4GHz的Doherty类功放，版图后仿真结果显示，饱和输出功率为40dBm，饱和点漏极效率DE为58.9%~61.3%，6dB回退点的漏极效率为38.3%~45%，增益为8.4~11.3dB，版图面积为2.4mm×1.1mm。关键词：多尔蒂；氮化镓高电子迁移率晶体管；单片微波集成电路；漏极效率中图分类号：TN432；TN722.7+5文献标志码：A文章编号：1672⁃2337（2023）04⁃0467⁃06DesignofaC⁃BandFully⁃IntegratedGaNMMICDohertyPowerAmplifierWANGJinchan,ZHANGPanpan,WANGDeyong,ZHANGJincan,LIUMin,LIUBo（SchoolofElectricalEngineering,HenanUniversityofScienceandTechnology,Luoyang471023,China）Abstract：Afullyintegratedmonolithicmicrowaveintegratedcircuit（MMIC）Dohertypoweramplifier（DPA）isdesignedusing0.25μmGaNHEMTtechnology.Anewtopologyisadopted,wheretheimpedanceconverterofthemainamplifierandtheimpedanceconverterafterthetwo⁃waysynthesisareremoved,andtheimpedanceconversionofthesa⁃turationpointandthebackoffpointisdirectlyrealizedinthemainoutputmatchingnetwork（OMN）.Additionally,ap⁃propriateimpedanceisadopted,whichreducestheimpedanceconversionrateandbroadensthefrequencybandcom⁃paredwiththetraditionalcircuit.Thepowerdivideralsoadoptsanoveltopology,whichreducestheuseofcomponents.Ontheotherhand,lumpedinductancecapacitorsinthematchingnetworkoftheDPAreducethelayoutarea.ADohertypoweramplifieroperatingat4.6~5.4GHzisdesigned.Thepost...
