网络分析仪原理.ppt

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1、NetworkAnalyzerBasics1NetworkAnalyzerBasicsNetworkAnalysisisNOT.…2NetworkAnalyzerBasicsWhatTypesofDevicesareTested?DevicetypeActivePassiveIntegrationHighLowAntennasSwitchesMultiplexersMixersSamplersMultipliersDiodesDuplexersDiplexersFiltersCouplersBridgesSplitters,divid

2、ersCombinersIsolatorsCirculatorsAttenuatorsAdaptersOpens,shorts,loadsDelaylinesCablesTransmissionlinesWaveguideResonatorsDielectricsR,L,C'sRFICsMMICsT/RmodulesTransceiversReceiversTunersConvertersVCAsAmplifiersVCOsVTFsOscillatorsModulatorsVCAtten’sTransistors3NetworkAna

3、lyzerBasicsDeviceTestMeasurementModelNFStimulustypeComplexSimpleComplexResponsetoolSimpleDCCWSweptSweptNoise2-toneMulti-ComplexPulsed-ProtocolfreqpowertonemodulationRFDet/ScopeParam.An.NFMtr.Imped.An.PowerMtr.SNAVNASAVSA84000TG/SADed.TestersI-VAbsol.PowerGain/FlatnessLC

4、R/ZHarm.Dist.LOstabilityImageRej.Gain/Flat.Phase/GDIsolationRtnLs/VSWRImpedanceS-parametersCompr'nAM-PMRFICtestFullcallsequencePulsedS-parm.PulseprofilingBEREVMACPRegrowthConstell.EyeIntermodulationDistortionNFMeasurementplane4NetworkAnalyzerBasicsLightwaveAnalogytoRFEn

5、ergyRFIncidentReflectedTransmittedLightwaveDUT5NetworkAnalyzerBasicsVerifyspecificationsof“buildingblocks”formorecomplexRFsystemsEnsuredistortionlesstransmissionofcommunicationssignalslinear:constantamplitude,linearphase/constantgroupdelaynonlinear:harmonics,intermodula

6、tion,compression,AM-to-PMconversionEnsuregoodmatchwhenabsorbingpower(e.g.,anantenna)WhyDoWeNeedtoTestComponents?6NetworkAnalyzerBasicsTheNeedforBothMagnitudeandPhase4.Time-domaincharacterizationMagTime5.Vector-errorcorrectionErrorMeasuredActual2.Compleximpedanceneededto

7、designmatchingcircuits3.Complexvaluesneededfordevicemodeling1.CompletecharacterizationoflinearnetworksHigh-frequencytransistormodelCollectorBaseEmitterS21S12S11S227NetworkAnalyzerBasicsAgendaWhatmeasurementsdowemake?Transmission-linebasicsReflectionandtransmissionparame

8、tersS-parameterdefinitionNetworkanalyzerhardwareSignalseparationdevicesDetectiontypesDynamicrangeT/RversusS-pa