EM_Simulation Microwave Office Training.ppt

IntroductiontoEMSimulation MicrowaveOfficeTraining 2 EMSimulation EMSimulation EMsimulationsetuphaschangedin7 5 EMusesdrawinglayers Case1 DrawandSimulateaStructureintheEMEnvironment Case2 UsingaLayoutCreatedintheEMEnvironmentinnormallayout Case3 ImportingDXFandGDSIILayoutsIntoEM Case4 ExtractinglayoutfromtheSchematicLayout 3 EMSimulation TheEMEnvironment Step1 Openuptheproject4Layer PCB Start emp ThisistheEMSocket Projectsgoinhere Tocreateaproject RConEMStructures ThevariousEMsimulators weareusingEMSight 4 EMSimulation EMEnclosureSettings TheEnclosuremenucontrolsmanyoftheimportantfeaturesofEM XandYboxdimensions andgridsize Bulkmaterialproperties DielectricLayerSetup Theconductinglineproperties layer conductivity andthickness EMLayerMapping Usedwhenworkingwithschematiclayoutandartworkcells Note LaterwewillbeseeingtheStackupElementforextraction ItisalmostthesameastheEnclosure withsomeextrafeatures 5 EMSimulation EMEnclosureSettings 2 Setsthexandydimensionsoftheenclosingbox Theheight z wesetlater Setsthegridinthexandydirections Youwanttheboxsizeawholenumberofcells Enclosure 6 EMSimulation GridSizeTips Linesshouldbe3to5cellswide Edgecouplersmightrequiremore Boxsize Don thavethewalltooclosetonearestmetal twosubstrateheightsawayisgood Makesuregaps spacinginfiltersisanintegernumberofcells Ifpossible startonasimpleproblemyouknowtheanswerto simplebend openline 2coupledlines Givesyouanideahowmanycellstouse Doubleyournumberofcellsandseeifyouranswerchangesalot Note 1000unknowns runsin30seconds frequency SolutiontimegrowsasN3 10 000unknowns 30 000seconds frequency NumberofUnknowns 7 EMSimulation EMEnclosureSettings 3 MaterialDefinitions AddingDielectrics ConductorProperties UsedforSurfaceImpedances Newin7 5 Presetvaluesremembermaterialsyouaddedbefore 8 EMSimulation EMEnclosureSettings 4 DielectricLayers MaterialscanbepickedfromthelistofDielectrics Drawscaleusedfor3Dvisibility Newin7 5 Placethemouseonalayertoseeitsproperties CansetthetopandbottomBoundaryConditions 9 EMSimulation EMEnclosureSettings 5 Materials Setstheconductinglinesproperties Thethicknessoftheline Whatit smadeof fromlistofConductorsinMaterialDefinitions Note EtchAngleandRoughnessarereservedforfutureuse Newin7 5 PerfectConductorwillalwaysexist madeoutofmaterialdefinition PerfectConductor 10 EMSimulation EMEnclosureSettings 2 EMLayerMapping ThiscontrolshowdrawinglayersaremappedtoEMlayers We llworryaboutitlater Newin7 5 ThismappingisintheEnclosureOptions 11 EMSimulation DrawingintheEMEnvironment TodrawinEM SelectanEMLayer SelectMaterial SelectConductororVia Extentishowmanylayersdowntheviaextends Newin7 5 Thestackupdisplayshowsyouthelayeryouareon 12 EMSimulation DrawingintheEMEnvironment 2 Step2 Drawaline 60milswide layer3tolayer4connectedbyavia 50X60mils Usematerial c astheconductor DrawTools Newin7 5 Thereisnotanyseparatebuttonforvias 13 EMSimulation DrawingintheEMEnvironment 3 3DView The3Dviewshowsthestructuretobesimulated Newin7 5 Alwayscheckthe3Dview itwillonlyshowwhatisbeingincludedinthesimulation 14 EMSimulation DrawingintheEMEnvironment 4 AddingEdgePorts Step3 Addanedgeporttoeachofthelines Selecttheline Selecttheedgeporticon andclickattheendoftheline Doubleclicktheedgeportandusethedraghandlestoselectthedeembeddinglength EMStructureLayout 15 EMSimulation Ports Youcandoubleclickonaportandchangeitsimpedance Alsocanchangehowmuchpowergoesintoit Note Thisonlyaffectscurrentandantennapatternviewing Sparametersarenotchanged Thereare3kindsofports EdgePorts Likenetworkanalyzerhookingupatedgesofstructure ViaPort Oneporttotoporbottomofbox ground Like1pointprobe InternalPort Acrossgap like2pointprobe Tip Becareful Whereisgroundforaninternalport Thereare3WebinarsinKBonthis EMSimulation ALookUndertheHood 1 2 3 16 EMSimulation DrawingintheEMEnvironment 5 PropertiesofanEMShape RConanyshape Properties Youcanchangeashape smaterialandEMlayer Note TheMeshOptionsTabcontrolshowfinelyashapeismeshed Younormallydon tchangethis unlessyouwanttooverridedefaultautomeshsettings YoucanseetheshapepropertiesintheLowerleftcorneroftheUI 17 EMSimulation DrawingintheEMEnvironment 6 ShowingOnlyActiveLayer Newin7 5 Therearevariousnewviewingoptionsforunderstandinglayers RCinthestackupdisplay HideShapesonNon activeLayers Inthisexample onlylayer3conductorsandviaswillbevisible Tip Youcanusethemousewheeltogothroughthelayers 18 EMSimulation EMSimulationOptions RCtosetsolveroptions RConprojecttogetindividualprojectoptions Someglobaloptionsunder Options EMOptions EMOptionsforanEMStructure Thistabissimulatorspecific 19 EMSimulation EMSimulationOptions 2 FrequencyControl Projectfrequenciescanbeoverriddenlocally Youcansetthemeshingfrequencyifyouwish Tip OftenyouwantfewerEMfrequenciesbecauseoflongsimulationtimes 20 EMSimulation EMSimulationOptions 3 AdvancedFrequencySweep AFS simulatesoverfrequencybandwith hopefully fewerfrequenciesand hopefully moreaccuracythanjustset discretefrequencies 21 EMSimulation EMSimulationOptions 4 AFSaddsfrequencypointsuptothemaximum untilconvergenceisreached Youcanspecifyabandbesidesthedefaultifyouwant Note WhenAFSisfinished thefrequencypointsdisplayedingraphingwillbetheoriginalpointsinthefrequencytab So youmightwanttosetatahighnumber 22 EMSimulation EMandNormalLayout SchematicLayoutandArtworkCellsuseDrawinglayersthathavealreadybeennamed TheEMMappingfileisusedtogivedrawinglayersmaterialproperties conductivityandthickness andlayerposition Thereareanumberofscenarioswherethisisneeded ImportingArtworkcellstoEMforsimulation UsinganEMlayoutinschematiclayout Extractingacircuit sschematiclayouttoEMlayout 23 EMSimulation UsinganEMLayoutinSchematicLayout WhenwecreatedourEMproject whatdrawinglayersdidituse Remember Ifyoucanseeit it sadrawinglayer Answer itautogeneratedthesedrawinglayers Note AllautogeneratedEMlayersbeginin SolongasweareonlyinEM thisisfine But whathappensifweusethislayoutintheschematiclayout 24 EMSimulation UsinganEMLayoutinSchematicLayout 2 Step4 Createanewschematic EM as Sub circuit AddtheEMStructureasasub circuit SchematicView LayoutView Itdrawsontheerrorlayer Theproblemistheschematiclayouthasnoideawheretoputtheauto generatedlayers 25 EMSimulation UsinganEMLayoutinSchematicLayout 3 ThesecretistounderstandtheEMmappingfile ItlivesintheLPFfile Alllayouts schematiclayout artworkcells EMprojects haveanLPFfile AllLPFfileshaveanEMmappingfile ittellsthematerialsandlinepositioninthestackupforeachdrawinglayer EMMappingfileforEMproject start These3layershavematerialandEMlayerposition Note Layernumberistopofdielectriclayer 26 EMSimulation UsinganEMLayoutinSchematicLayout 4 DefaultLPFforproject TheschematiclayoutusesthedefaultprojectLPF anditsEMMapping Thisiswhyitdoesn tknowwhattodowiththeautogeneratedlayers Theyaren tevendefinedintheschematiclayoutLPF 27 EMSimulation UsinganEMLayoutinSchematicLayout 5 Tofixtheproblem TheEMproject sLPFwasgeneratedfromtheprojectLPF thentheautogeneratedlayerswereadded WefixtheprojectLPF sothatanyEMprojectwecreatewillhavetherightmapping Step5 Modify4LayerPCB lpf ModifieddefaultLPF Note Acommonmistakeistomisspellthematerialname 28 EMSimulation UsinganEMLayoutinSchematicLayout 6 Step6 UpdatethedependentLPFs i e theEMprojectscreated RContheLPFinLayerSetup andUpdate YoucanselecttheDependentLPFstoupdate 29 EMSimulation UsinganEMLayoutinSchematicLayout 7 SchematicLayout TheEMautogeneratedlayershavedisappeared Theyaren tneeded Forexample itknowsifyouwantaconductoronemlayer3 youareondrawinglayermet2 Note AnynewEMprojectswillalsohavethismapping astheyaregeneratedfromthedefaultprojectLPF 30 EMSimulation OptionsforViewingLayers Thereareavarietyofviewingoptions RCinthedrawinglayerspane Optionsforviewing Shapesonunmappedlayers Shapesonmappedlayers Shapesonmissinglayers I veuncloakedallunmappedlayers AnXindicatesunmapped Tip The3DEMviewonlyshowsmappedlayers Goodwaytoseewhatisreallysimulating 31 EMSimulation MultipleEMMappingFiles YoucanhavemultipleEMMappingFiles YoucancreatethesefortheprojectLPF orforEMMappingFileforagivenproject DifferentEMMappings Examples Switchbetweenlossylinesandperfectconductors InMMIC mightnotwanttomaptoEMallmetallayers DifferentLPFfiles 32 EMSimulation ImportingDXFandGDSIIintoEM ExternalWorldGDSIILibrariesDXFLibraries ArtworkCellLayout EMLayout LooksforModelLayersbysamename orcreatesthem Step7 Importmypad dxf Method1 Copyandpastethedrawinglayers Selecttheshapesandchangethelayers Method2 ChangetheEMMappingfile socanrepeatedlyusethemappinginthefuture 33 EMSimulation Method1 ImportandChangetheLayers Step8 CopytheEMproject start RenamethecopytoVia Sim Deletethestructures Tip OnewaytomakemanyEMprojectswithsamesettings istocopyanemptyEMproject Step9 Copyandpastetheartworkcell New DXF CellintotheEMProject YoucanuseCtrl C Ctrl V 34 EMSimulation Method1 ImportandChangetheLayers 2 It splacedontheErrorlayer Youcanfixitbyselectingthepropertiesofeachelement andmovingittotherightdrawinglayer Step10 SettheshapesonTopMetaltomet1 theshapeonPadtoEMLayer2 Via SettingsforTopMetal SettingsforPad 35 EMSimulation Method1 ImportandChangetheLayers 3 Tofinishitup youwouldchangetheboxsize andextendthelineandaddaport 36 EMSimulation Method2 UpdatetheEMMappingintheLPFFile Step11 CreateanewEMMapping callitPadMap Step12 SetupthemappingorPadandTopMetal Note WecouldhavejustmodifiedtheDefaultMapping butthisgivesuspracticewithmultipleEMMappings 37 EMSimulation Method2 UpdatetheEMMappingintheLPFFile 2 Step13 CopytheEMProject start renameittoPad with Mapping Deletetheshapes Step14 UpdateDependentLPF s selectonly Pad with Mapping 38 EMSimulation Method2 UpdatetheEMMappingintheLPFFile 3 YouhavetheEMMappingsfromtheLPFintheEMproject SelectPadMap andyoucannowimporttheshapes 39 EMSimulation EMExtraction ExtractionsendsselectedPCellsandothershapestotheEMSocket AdvantagesDrawingcarriedoutbythePCells Asschematiclayoutchanges cankeepsendingnewlayouttoEMsimulatoreasily Ports anddeembeddinglinesareautomaticallyincluded Sparameterresultsareautomaticallybroughtbackintotheschematicandre simulated DisadvantagesAlmosttooeasy NeverseetheEMlayout Boxcanbetoosmall wronglayers boundaryconditions Cangetoffmesh 40 EMSimulation EMExtraction 2 Step15 Openuptheprojectdouble stub emp 41 EMSimulation EMExtraction 3 Makesurethelayoutisconnected SimulationResults 42 EMSimulation EMExtraction 4 ToextractthecircuittoEMweneedtwoelements TheExtractionElement Elements SimulationControl Elements Substrates TheStackupElement ControlsSizeofenclosureandmeshSimulatorTypeWhatelementsareextracted ControlsLayers Materials It sessentiallythesameasEnclosurewithextrafeatureofLineTypeextractions 43 EMSimulation EMExtraction 5 Step16 AddtheExtractionblocktotheschematicandconfigureit EM Doc TheEMProjectcreated Name Theextractiongroupname Extension Theboxwillbethismuchbiggerthannearestconductor Note Putin 44 EMSimulation EMExtraction 6 Step17 ConfiguretheStackupblock 45 EMSimulation EMExtraction 7 Note Whenyouchangethemappingfile youwillgetawarning nextslide 46 EMSimulation EMExtraction 8 LineTypeMapping ThiscanbeusedasanalternativetoEMmapping whenyousettingupwhatEMLayerandMaterialforaLineTypetouse Note ItisnormallyusedwithiNets 47 EMSimulation EMExtraction 8 T