A High Efciency Broadband Class-E Power Amplifier Using a Reactance Compensation technique.pdf

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1、IEEEMICROWAVEANDWIRELESSCOMPONENTSLETTERS,VOL.20,NO.9,SEPTEMBER2010507AHighEfficiencyBroadbandClass-EPowerAmplifierUsingaReactanceCompensationTechniqueChi-HsienLinandHong-YehChang,Member,IEEEAbstract—Thisletterpresentsahighefficiencybroadbandfullyintegratedclass-Epow

2、eramplifier(PA)usinga0.5enhance-ment/depletion-pseudomorphichigh-electronmobilitytransistor(E/D-PHEMT)process.TheproposedPAisbasedonaclass-Etopologywithareactancecompensationtechnique.Toachievehighefficiencyandbroadbandwidth,thereactancecompensationcomponentisemplo

3、yedintheloadnetworkoftheclass-EPA.From1.5to3.8GHz,thiscircuitdemonstratesapoweraddedefficiency(PAE)of62%andanoutput1dBcompressionpointofhigherthan27dBm.Fig.1.Equivalentoutputcircuitoftheclass-EPAwiththereactancecompen-sationnetwork.IndexTerms—Enhancement/depl

4、etionpseudomorphichighelectronmobilitytransistor(E/D-PHEMT),highefficiency,powertechnologyinthisletter.Theenhancement-modepseudomor-amplifier(PA),reactancecompensation.phichighelectronmobilitytransistors(E-modePHEMT)aresuitableforthemodernwirelessmobilecommunication

5、sdueI.INTRODUCTIONtotheirsinglevoltagesupplyandlowkneevoltagecharacter-istics[5].AfewhighefficiencyPAshavebeendemonstratedIRELESSmobilecommunicationsystemshavebeenusingGaAsMESFET[6]–[8],andquasiE-mode[9],[10]Wgrowinginrecentyears.Inmostmobilecommunica-technologies.

6、Byusingthereactancecompensationtechnique,tions,batteriesareusuallyadoptedasdcpowersupply.Powerourproposedclass-EPAachievessuperiorperformance.Fromamplifier(PA)inthemobiletransceivergenerallyconsumes1.5to3.8GHz,ourclass-EPAdemonstratesapoweraddedlargedcpower.Therefo

7、re,ahighefficiencyPAisrequiredforefficiency(PAE)ofabove62%andanoutput1dBcompressionthemobilecommunicationsduetothelimitationofthebatterypointofhigherthan27dBmoverthe3dBbandwidth.capacity.Comparingwiththelinearpoweramplifier,theclass-ETothebestoftheauthors’knowledge,t

8、hisisthefirstfullyPAisoneofthemostpopularswitching-modeamplifiersduetointegratedmicrowaveclass-EPAwiththereactancecompen-itshighefficiencyandsimplecircuitr