利用ADS设计基于MESFET的宽带功率放大器

ADSMESFET(,541004):,,ADS,,:;ADS;S;:TN722.3:A:100528788(2008)0620058204DesignofMESFET2basedbroadbandpoweramplifierbyutilizingADSXingLingyan(SchoolofInformationandCommunicationEngineering,GuilinUniversityofElectronicTechnology,Guilin541004)Abstract:Amethodforthedesignofthebroadbandpoweramplifierbysmallsignalapproachisintroducedwhenlargesignalmodelsofdevicescannotbeacquired.Thesmallsignalapproachisadoptedtoperformthedesign,optimizationandsimulationoftheelectriccircuitssimultaneouslyaccordingtotheindexesoftheamplifierbyusingADSsoftwareonthebasisofGaAsFETsoastoimplementthebroadbandpoweramplifierdesignwiththeexpectedvalues.Keywords:broadbandpoweramplifier;ADSsoftware;S2parameter;gain,[1][2],,,,SIVIV(RL),,,,,,AdvanceDesignSystem(ADS)2005A,11.134GHz,500MHz;50;,;A;4dB;30dB[3]1.2:(S),,,ADS2S[4]:,(FET)IV,,11RL=2(Vb-Vs)/Imax,,Imax;Vb;Vs:2008206218:(60432040);(NCET20520754);(200327):(19852),,,,UWB8520086(150)STUDYONOPTICALCOMMUNICATIONS2008(Sum.No.150)Pout=12Imax2RL=(Vb-Vs)Imax/2S,CADS;(Psat),1dB(P1dB);,:P1dBPsat1dB;IP3P1dB1012dB3,,[5],34GHz,FUJITSU(GaAsFET)FLL357ME,[6]:P1dB35.5dBm,G1dB11.5dB,C,15V,,,,4ADS[78](MESFET),:IVRL,,;,4.1ADSFLL357MEIV[9],22FLL357MEIVRL=2(Vd-Vs)1.2Idss=2(10-1.8)1.21.3=10.6,,Vd();VsIV;IdssVGS=0,RLCds,RL,Cds,,CdsSADS,:Cds=0.47pF,Rdp=0.51,Ldp=0.11nHLdpRdp,,ADS333ADS4,(S(1,1))-22.442dB,(50),,44.2,95:ADSMESFETFLL357MES,,556,(S(2,2))-20.186dB,64.3,,(500MHz),,[6],,,,77RFCF,:RF=Z0(1+|S21|),,Z0=50;S21S,(RF),(DC)4.4[10],,ADS,FLL357MESs2pdataitemss2p,3,,899,BW3.76-3.24=520MHz,,300MHz(8)200,(PwrGain)10.1979.055dB,1dB,,0620086150(10),K34GHz1,,11,2,,5ADS,S,ADS,,,,,-10dB500MHz,9dB,20dBm,3dB,1.81,,::[1].[M].:,2005.[2].[M].:,1982.[3]AlSweet.MESFETPowerAmplifierDesign:SmallSignalApproach[EB/OL].[4]ReinholdLudwig,PavelBretchko().-[M].:,2002.[5]BehzadR.RFmicroelectronics[M].UpperSaddleRiver,NJ:PrenticeHallInc.,1998.[6]GonzalezGuillermo(),().[M].:,2003.[7],,,.CAD[M].:,1996.[8]RadmaneshMatthewM.Radiofrequencyandmicro2waveelectronicsillustrated[M].Beijing:PublishingHouseofElectronicsIndustry,2002.[9]RadmaneshMatthewM(),,().[M].:,2006.[10].[M].:,2002.(29)[3]YokokawaT,KatoT,FjiiT,etal.DispersionCom2pensationFiberwithLargeNegativeDispersionAround2300ps/(nm.km)anditsApplicationtoCompactMod2uleforDispersionAdjustment[A].OFC2003[C].Atlanta,Georgia,USA:GeorgiaWorldCongressCen2ter,2003.FK5,7172718.[4]MatsumotoS.TunableDispersionSlopeCompensatorwithaChirpedFiberGratingfor1602Gbit/sRZTrans2missions[A].OFC2003[C].Atlanta,Georgia,USA:GeorgiaWorldCongressCenter,2003.TuD4.[5]NiYi,ZhangLei,AnLiang,eta1.Dual2CorePhotonicCrystalFiberforDispersionCompension[J].IEEEPhotonTechnol.Lett.,2004,16(6):151621519.[6]OIFEDCWhitepaper22005,Electronicdispersioncom2pensationfor10Gbit/s1550nmopticallinks[S].16:ADSMESFET