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PCB上微带线的电磁耦合时域建模分析方法
Title:Time-DomainModelingandAnalysisMethodsforElectromagneticCouplingofMicrostripLinesonPCBs
Abstract:
Theelectromagneticcouplingbetweenmicrostriplinesonaprintedcircuitboard(PCB)isacriticalaspectofthedesignandanalysisprocess.Itaffectstheperformanceandfunctionalityofhigh-speeddigitalsystemsandcanleadtocrosstalk,signalintegrityissues,andelectromagneticinterference.Thispaperpresentsanin-depthreviewandanalysisoftime-domainmodelingandanalysismethodsfortheelectromagneticcouplingofmicrostriplinesonPCBs.ThepaperhighlightstheimportanceofunderstandingthesemethodstomitigateelectromagneticcouplingeffectsandensurereliablePCBdesigns.
1.Introduction
Withtherapidadvancementofdigitalsystems,therequirementforhigh-speedandhigh-frequencysignaltransmissionhasbecomeincreasinglyessentialintoday'selectronicsindustry.OnecommontechniqueforsignaltransmissiononPCBsistheuseofmicrostriplines.However,thecloseproximityofthesemicrostriplinescanresultinsignificantelectromagneticcoupling,leadingtounwantedinterferenceandsignaldegradation.Therefore,accuratemodelingandanalysismethodsarecrucialforeffectivelyassessingandmitigatingtheeffectsofelectromagneticcouplingonmicrostriplines.
2.Time-DomainAnalysisMethods
2.1.Full-WaveElectromagneticSimulations
Full-waveelectromagneticsimulations,suchastheFiniteDifferenceTimeDomain(FDTD)andMethodofMoments(MoM),providehighlyaccuratemodelingofelectromagneticfielddistributionsandcouplingeffectsbetweenmicrostriplines.Thesesimulationsconsiderthegeometricpropertiesanddielectricpropertiesofthemicrostriplinesandsurroundingenvironment.Withtheadvanceofcomputationalpower,full-wavesimulationshavebecomeapopularchoiceforanalyzingelectromagneticcouplingeffects.
2.2.TransmissionLineModels
Transmissionlinemodelsarewidelyadoptedfortheanalysisofhigh-speeddigitalsystems.Thesemodelstreattheentiremicrostriplineasanequivalenttransmissionline,capturingtheimpedancecharacteristicsandpropagationproperties.Time-domainbehavioralmodels,suchasthemodifiednodalanalysis(MNA)andm