一种采用双耦合等效跨导增强技术的94 GHz CMOS LNA-豆柴文库

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一种采用双耦合等效跨导增强技术的94GHzCMOSLNA
Introduction
Withthecontinuousadvancementofcommunicationtechnology,thedemandforhigherfrequencycommunicationsystemsisincreasing.Millimeter-wave(MMW)frequencybands,specificallythoseabove30GHz,havegainedattentionduetotheirhighdataratesandpotentialfornumerousapplicationssuchasradarsensing,imaging,short-rangewirelesscommunication,andmore.Oneofthekeycomponentsrequiredforsuchsystemsisthelownoiseamplifier(LNA),whichisusedtoamplifytheweaksignalswithoutintroducingexcessivenoise.Inthispaper,wepresenta94GHzCMOSLNAwithdouble-coupledequivalenttransconductanceenhancementtechnique.
LNADesign
The94GHzLNAisdesignedusing65-nmCMOStechnology.TheLNAutilizesadouble-coupledequivalenttransconductanceenhancementtechnique,whichiseffectiveinimprovingthetransconductancegainoftheamplifier.TheLNAconsistsofathree-stagecascodeamplifierwithsourceinductorsineachstage.
Thefirststageisacommongateamplifierwithacapacitivefeedbacknetworktoimprovecircuitstability.Thesecondstageisacommonsourceamplifierwithatransformercouplingtoimprovethesignal-to-noiseratio.Thefinalstageisacommonsourceamplifierwitharesistivefeedbacknetworktoprovidegaincontrol.Toimprovetheinputimpedancematching,theLNAincludesamatchingnetworkconsistingofaseriesinductorandshuntcapacitorattheinput.
TheLNAisoptimizedforamaximumpowergainof20dBandanoisefigureoflessthan4dB.Thesimulationresultsshowapowergainof18.4dBandanoisefigureof3.91dB,whichmeetsthedesignspecifications.TheLNAisalsodesignedtohavealowpowerconsumptionof13.4mWwithasupplyvoltageof1V.
Double-CoupledEquivalenceTransconductanceEnhancementTechnique
Thedouble-coupledequivalenttransconductanceenhancementtechniqueisusedintheLNAtoimprovethetransconductancegainoftheamplifier.Inthistechnique,twoidenticalconductorsareplacedinparallel,whichsignificantlyincreasesthetransconductancegain.
Theimplementationofthetechniqueinvolvestheinclusionoftwocouplingcapacitorsandacouplinginductorinserieswiththegateandsourceofeachtransistor,respectively.Thecouplingcapacitorandinductorar