=================================DOI:10.13290/j.cnki.bdtjs.2023.07.008600半导体技术第48卷第7期2023年7月基金项目:重大科技成果转化专项(222802027)Q波段高线性高效率GaN功率放大器MMIC邬佳晟,蔡道民,高学邦,陈晓宇(中国电子科技集团公司第十三研究所,石家庄050051)摘要:针对卫星通信和5G毫米波通信应用,基于深亚微米GaN工艺,开发了一款高功率、高线性和高效率的功率放大器单片微波集成电路(MMIC)。根据器件的最大增益和负载牵引特性确定末级晶体管的总栅宽;根据增益要求采用4级放大器级联,前级、次前级、末前级和末级的栅宽比为1∶2∶4∶8;通过对末级和前三级栅极偏置电压分别加电,实现对各级电路增益分别调节,以提高放大器的线性度;输出匹配网络中包含了二次谐波调谐电路,以降低谐波分量,提高放大器的效率,并结合片外模拟预失真电路实现线性度提升。功率放大器MMIC芯片尺寸为2.6mm×2.1mm。测试结果表明,在37~42GHz,放大器的饱和输出功率大于40dBm,功率附加效率大于30%,功率增益大于18dB,三阶交调失真(IMD3)@36dBm小于-30dBc。关键词:Q波段;线性度;功率放大器;谐波调谐;预失真;单片微波集成电路(MMIC)中图分类号:TN722.75;TN43文献标识码:A文章编号:1003-353X(2023)07-0600-05Q-BandGaNPowerAmplifierMMICwithHighLinearityandHighEfficiencyWuJiasheng,CaiDaomin,GaoXuebang,ChenXiaoyu(The13thResearchInstitute,CETC,Shijiazhuang050051,China)Abstract:BasedonthedeepsubmicronmetreGaNprocess,ahighpower,highlinearityandhighefficiencypoweramplifiermonolithicmicrowaveintegratedcircuit(MMIC)appliedinsatellitecommuni-cationand5Gmillimeter-wavecommunicationwasdeveloped.Thetotalgatewidthofthefinalstagetran-sistorwasdeterminedbythemaximumgainandloadpullcharacteristicsofthedevice.Afour-stageampli-fierwasadoptedaccordingtothegainrequirement.Thegatewidthratiooftransistorsinthefirst,second,thirdandfinalstageis1∶2∶4∶8.Byadjustingthegatebaisvoltagesofthefinalstageandthefirstthreestagesrespectively,thegainofeachstageofthecircuitcanbeadjustedseparatelytoimprovethelinearityoftheamplifier.Theoutputmatchingnetworkincludedthesecondharmonictuningcircuittoreducetheharmoniccomponentsandimprovetheefficiencyoftheamplifier,andthelinearit...