标签: shielding

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EMCGrounding&shieldingEMCGrounding&Shielding-rllrr!tr-tlvF-rttt^-l!r^PracticalTools,TipsandTechniquesforSystemsandDesign2005HostedbyKimmelGe*eAssociates.LtdTektronixTABLEOFCONIENIS4....PEdliINTRODICnON9............KEMylnrcaIsl3...........sourcePalh,RcptorMod6l21...PAN||:PHILOSOPHYEPHYSICSOFEMI23...-......,FAT.rCoorcspl24.._....,....F6quencyandrim(Ftun.r)30.-........FEquncyandDmnsi@s31....................TEnemi$onLns35.............,.....Anlmas40...-.....,..FEquncyandtmpdance44...PanTiGROUNDING,{4...........GMdsDofnd53.....-.....,TenEMcGendngFix654....................Fixpoi.tGoundsr1:6tMdLoops&Singte53..-.................Fir#2rGomdGddsaStEp660...............,....Fh#3:Mutti?dnrGounds62....,..._......_...,……

EMCShieldingGreatHumanTechnology,INC.ShieldingforEMCGoodtopologicalplanningduringthedesignphaseisabsolutelyessentialtoensureelectromagneticcompatibility(EMC)inelectronicequipmentandinstallations.TopologymaybelikenedtoageometrichierarchyofEMzones,rangingfromanutterlyunprotectedenvironmenttoacompletely"clean"one,suchasacomputerroomorarackinwhichallsensitiveelectroniccircuitryhasbeenenclosedwithinatightmetallicshield.Barriersinstalledbetweenzonespreventunwanteddisturbancesfrompassingintoprotectedareas,whethertheybeelectromagneticfieldsgeneratedbyintentionalorunintentionalradiotransmitters,transientsinducedonpowerlines,electrostaticdischarges,orotherEMthreats(seeFigure).Figure1.Shieldsareused……

AGuidetoEMIShieldingGasketTechnologyGreatHumanTechnology,INC.AGuidetoEMIShieldingGasketTechnologyOptionsinmaterialsofconstruction,shieldingeffectiveness,andclosureforceabound,asthisprimeroutlines.EMIshieldinggasketshavebeenwithusformorethan50years,eversincethosefirstelectromagneticwavesbegantowanderwheretheywerenotwanted.AnEMIshieldinggasketisaconductivemediumdesignedtofillequipmentaperturesandtoprovideacontinuouslow-impedancejoint.Itistechnicallydefinableasaflexibleconnectionbetweentwoelectricalconductorswithafixedresistancetocurrentpassingthroughit.TheEMIgasketbeganasarandomlyplacedgroundpoint,butgasketdesignshaveevolvedanddiversifiedtomatchthegrowingproliferationofelectronicequipmentoverthepasthalfcen……

Shielding_and_DecouplingLocalizedShieldingPage-1ShieldingandEMIforWirelessCircuitsByAllenPodellVPofTechnology,BesserAssociatesWithmuchmaterialfromAnatoliTsaliovichCopyright1999A.TsaliovichCourtesyoftheauthorLocalizedShieldingPage-2IntroductionEMIandunwantedcouplingbetweencomponentsorsystemsisbeingaddressedbyimprovedgrounding,balancedlines,widebanddecouplingchokes,andlocalshielding.Thecharacteristicsoflocalshieldingareaddressedinthistalk,alongwithsomeothertechniquesforEMImitigation,suchasbalancedlines,singlepointgrounding,slottedgroundplanes,ferritebeads,andmultiplebypassing.EMsimulationisaninvaluabletoolwhenassessingtheeffectivenessofthesetechniques.Moreover,theimprovedspeedofsimulationhasledto……

FieldGroundingandShieldingApplicationNoteFieldGroundingandShieldingApplicationNoteOverviewUnfortunately,it’simpossibletofinishthesystemintegrationtaskatatime.Wealwaysmeetsometroublesinfield.Suchascommunicationnetworkorsystemisn'tstable,noiseinfluence,andequipmentisdamagedorhungsupbythunders.However,themostpossibleissueisjusttheimproperwiring;ie,groundingandshielding.Asyouknowthe80/20ruleinourlife:wespend20%timefor80%works,but80%timeforleft20%works.Sotosystemintegration,wepaid20%costforWire/Cableand80%costforEquipment.However,80%reliabilitydependsonGroundingandShielding.Inaword,wejustneedtopay20%investmentandworkonthosetwoissuestogetahighreliablesystem.Thisapplicationnotewillbringyousomeconceptsa……

WAVECOM射频PPT,Shieldingdefinition……

摘要：一次性金属糖果盒，如那些从Altoids，使优良的屏蔽罩，实验室测试。Maxim/Dallas>AppNotes>GENERALENGINEERINGTOPICSPROTOTYPINGANDPCBOARDLAYOUTKeywords:Altoids,shielding,shieldedenclosuresJan31,2002APPLICATIONNOTE946DisposableMetalBoxesMakeExcellentShieldedEnclosuresDisposablemetalcandyboxes,suchasthosefromAltoids,makeexcellentshieldedenclosuresforlabtests.Engineersputextensiveeffortintodesigningandconstructinglabtestcircuitswhichoftenareleftinadrawer,undocumentedandvulnerabletodamage.Thenexttimethesamefunctionisrequired,eitherthesameengineeroranewengineerbuildsanewcircuitratherthanfindandanalyzethepreviouslybuiltboard.Onewaytobreakthiswastefulcycleisusethesmallsteeltinsinwhichcandi……