第43卷第1期2023年2月Vol.43,No.1Feb.,2023固体电子学研究与进展RESEARCH&PROGRESSOFSSE一体化匹配网络的Q波段Doherty功率放大器MMIC设计∗彭晨睿∗∗郭润楠陶洪琪余旭明(南京电子器件研究所,微波毫米波单片集成和模块电路重点实验室,南京,210016)2022⁃11⁃15收稿,2023⁃01⁃06收改稿摘要:提出了一种毫米波Doherty放大器一体化匹配网络的设计方法。该匹配网络将功率合成、阻抗变换和相位调节功能一体化,结合兰格耦合器,去除了传统Doherty功放结构中输出和输入四分之一波长线。采用0.15μmGaN工艺研制了一款Doherty放大器MMIC。连续波测试条件下,此放大器在38~42GHz频段内,饱和功率达到40dBm,饱和PAE大于24%,6dB输出功率回退PAE达到16%。在中心频率40GHz、20MHz双音间隔测试条件下,输出功率回退3dB时,放大器的三阶交调失真IMD3小于-21dBc。关键词:Doherty功率放大器;单片微波集成电路;氮化镓;负载调制中图分类号:TN722文献标识码:A文章编号:1000⁃3819(2023)01⁃0021⁃06DesignofaQ‑bandDohertyPowerAmplifierMMICwithanIntegratedMatchingNetworkPENGChenruiGUORunnanTAOHongqiYUXuming(ScienceandTechnologyonMonolithicIntegratedCircuitsandModulesLaboratory,NanjingElectronicDevicesInsti⁃tute,Nanjing,210016,CHN)Abstract:Adesignmethodofintegratedmatchingnetworkwasproposedformillimeter-waveDohertypoweramplifier(DPA)inthispaper.Theproposedmatchingnetworkintegratedthepowercombing,impedancetransformationandphaseoffsettingfunctionstogether,andcombinedwithLangecouplertoremovethequarterwavelengthtransmission-lineofoutputandinputinthetraditionalDPAstructure.ADPAMMIChadbeendesignedandfabricatedon0.15μmGaNHEMTtechnique.Undercontinuouswavetestcondition,thesaturatedpowerofthisamplifierreaches40dBm,thesaturatedPAEismorethan24%,andthe6dBoutputpowerback-offPAEis16%over38⁃42GHz.Undertheconditionoftwotonetestwithcenterfrequencyof40GHzandintervalof20MHz,thethird-orderintermodulationdistortion(IMD3)oftheamplifierislessthan-21dBcat3dBoutputpowerback-off.Keywords:Dohertypoweramplifier(DPA);monolithicmicrowaveintegratedcircuit(MMIC);GaN;loadmodulation■■■■■■■■■■■■■■■■■■■■宽禁带半导体∗基金项目:国家...