RF-Concept-Training(RF连接器概念培训).ppt

WelcomeToRFConceptTrainingEditbyBruceLiuAug 08 2012 TechnologiesSupportedCDMAGPRS EdgeTDMAGSMW CDMAUMTS WirelessInfrastructureMarket Applications AmplifiersAntennasFiltersJumperAssembliesLowNoiseAmplifiersPowerSplitters CombinersSwitches Relay WirelessInfrastructureMarket MarketDriversEricssonLucentNokiaCiscoHuaweiMotorola RFSolutionsSMATypeNMCXSMB MCXMMCXSemi RigidAssembliesRFSwitch RFConnectorAnatomy WhatisRFConnector AconnectorisadeviceusedtoconnecttocablesorotherdevicesthroughwhichelectromagneticenergyistransferredfromoneplacetoanotherBody Contact Insulator Body Contact Insulator ConnectorAnatomy DiscontinuityCompensationSteps ContactBarb SlottedContact CableAnatomy WhatisRFCable CableisatransmissionlinethroughwhichelectromagneticenergyispropagatedandtransferredfromoneplacetoanotherJacket Braid Shield Dielectric CenterConductor Conductor Dielectric Jacket Shield Braid TypesofCable 1 FlexibleCoax2 Corrugated3 Semi Flexible4 Semi Rigid Development ProductDevelopedFreq Imp CouplingCommentsUHF1930 s300MHzn aThreadedAmphenolengineerClarkQuackenbushinventedforuseintheRadioIndustry N1940 s11GHz50 75ThreadedInventedbyPaulNeillofBellLabs Firsttruemicrowaveperformance C1940 s10GHz50BayonetAmphenolengineerCarlConcelmaninventedabayonetversionoftheTypeNforquickinstallation BNClate1940 s4GHz50 75BayonetMiniatureversionoftheTypeC NamedforAmphenolengineerConcelmanandBellLabsengineerNeill BayonetNeillConcelman TNClate1950 s11GHz50ThreadedThreadedversionoftheBNCforuseinhighvibrationapplications ThreadedNeillConcelman Development ProductDevelopedFreq Imp CouplingCommentsSMA1960 s18GHz50ThreadedSemi precisionconnectororiginallydevelopedfor 141semi rigidcable 1 4 36threadedcoupling Sub MiniatureA SMB1960 s4GHz50 75Snap OnVersionofSMAwithsnap oninterface Sub MiniatureB SMC1960 s10GHz50ThreadedVersionofSMBwiththreadedcouplingforhighvibration Couplingis10 32 10 190 Sub MiniatureC Mini UHF1970 s2 5GHz50ThreadedMiniatureversionoftheUHFinventedbyAmphenolengineer Quackenbush inthe1930 s Development ProductDevelopedFreq Imp CouplingCommentsMCX1980 s6GHz50Snap OnMicroCoaxisatradenameofH STheself centeringspringisthereverseoftheSMBandallowsa30 sizereduction DesignedinEuropeunderMil SpecCECCtocompetewithAmericanSMB MMCX1990 s6GHz50Snap onMiniatureversionoftheMCXoffering25 sizereduction DesignedinEuropetocompetewithAmericanSSMBdesign 1 0 2 31990 s4 10GHz50Push Pull DevelopedinEuropefortheTelecomThreadedindustry SimilarinsizetotheSMB 7 161990 s7GHz50ThreadedDevelopedinEuropeforBaseStationsandCellSiteAntennas 7mmisODofinnerconductor 16mmistheIDoftheouterconductor body Coupling ThreadedBayonetSnap OnPush Pull1 6 5 6BNCMCX1 0 2 37 16HDBNCMMCXSMBMini UHFTypeCSMBSMATypeGSMCTypeFTypeNTNCTwinaxialUHFThreaded Screw oncouplingrequiresmoretimetoinstallbutisexcellentinhighvibrationapplicationsandoperatesoverthehighestfrequencyrangesinceitaffordsthebestconnection Bayonet Snap on Push pull Thesecouplingsensurequickinstallationandareeasiertotroubleshoot Frequency Frequency SinceRF microwavesignalsareAC alternatingcurrent theyswingfromapositivetoanegativevalueinacycle Thenumberofcyclespersecondisthefrequency measuredinHertz SomeTypicalFrequencies AMRadio500 1500kHzShortwaveRadio10MHzTV60 250MHzCellularPhone824 894MHzDigital PCS Phone1850 1990MHzRadar6 26GHzDirectBroadcastSatellite DBS 12GHz FrequencyChart GHz Definitions VSWRAcronymforVoltageStandingWaveRatio VSWRistheratioofvoltageappliedtovoltagereflected Itisthemajorfactorcontributingtothetotalsignalefficiencyoftheconnector InsertionLossTotallossofpoweratthereceivingpointafterinsertionofacomponentintothetransmissionline It sdependentontheconnector sinsulation conductormaterialsandisthesecondmajorfactorinsignalefficiency ReturnLossTheportionofasignalthatislostduetoareflectionofpoweratalinediscontinuity ReturnLossisproportionaltoVSWRandispreferredintheCATVindustrytoaVSWRspecification VoltageratingThemaximumoperatingvoltagethedevicecanwithstandwithoutbreakdown D W V DielectricWithstandVoltageisthemaximumhighvoltagesurgethedielectric insulator canwithstandwithoutbreakdown VectorNetworkAnalyzer Plating Thetablebelowshowscommonplatingandbasemetals Theelectricalconductivityisrelativetothatofbrass Forexample Silverisa2 41timesbetterconductorthanbrass RelativeCorrosionMaterialConductivityDurabilityResistanceSilver2 41GoodAverageCopper2 27AveragePoorGold1 60ExcellentExcellentBrass1 00AverageAverageZinc0 65PoorPoorNickel0 57GoodGoodStainlessSteel0 05ExcellentExcellentConnectorbodiesareusuallyplatedwithGold NickelorSilver DrawbacksarethatGoldandSilveraremoreexpensivewhileNickelisnotasgoodaconductor Silveralsotarnisheseasily Nickel slowconductivityisnotaproblembelowafewGHz SelectionGuidelines Selectaseries 1 Impedance Typicalimpedanceofasystemis50or75ohm SeeOverviewincatalogforimpedancebyseries 2 FrequencyRange Connectorseriesrangefromamaximumof100MHzto26 5GHz SeeOverviewincatalogforfrequencyrangebyseries 3 Cable Connec