阵列天线设计与仿真ppt课件

1,阵列天线仿真,.,2,ArrayOverview,.,3,AnalysisApproaches,.,4,UnitCellAnalysiswithMaster/SlaveBoundaries,.,5,UnitCellSimplification,.,6,Master/SlaveBoundaries,.,7,UnitCellCreation,.,8,VerifyingtheUnitCellGeometry,.,9,FloquetPortsOverview,.,10,FloquetModeVisualization,.,11,FloquetPorts:DeterminingtheModestoInclude,.,12,ModesCalculator,.,13,FloquetPortSetup,.,14,FloquetPortSetup,.,15,WhatiftheLatticeisTriangular,.,16,FloquetPortSetup,.,17,FloquetPortSetup,.,18,FloquetPortSetup,.,19,ResultsMatrixData,.,20,Results:ReturnLoss/InsertionLoss,.,21,.,22,FiniteArrayAnalysis,.,23,ChallengesforLargeFiniteArrayModeling,.,24,DomainDecompositionOverview,.,25,Solution:FiniteArrayDomainDecomposition,.,26,FiniteArrayDDMToolAdvantages,.,27,HowItWorks!,.,28,HowItWorks!,.,29,HowItWorks!,.,30,HowItWorks!,.,31,ProbeFedPatchArraywithFeedNetwork,.,32,FinitePhasedArraySetupUsingDDM,UnitcellisanalyzedtocreatemeshUnitcellmeshisthenreplicatedtoformremainingelementsinthearray,.,33,MutualCouplingData,.,34,ActiveReturnLosswithPhaseTaper,.,35,EmbeddedElementPatterns,.,36,ArrayPatternintheE-Plane,ArrayhasnophaseshifttapersothebeamispointedtowardboresiteSidelobeLevelsare-10.86dBand-13.23dBintheE&HPlanes.,.,37,ArrayPatternScannedto45ointheE-Plane,.,38,ExplicitlySolvedPatchArrayvs.DDMComparison,.,39,.,40,用CSTMicrowaveStudio仿真阵列天线,.,41,Outline,AntennasimulationDifferentsolversfordifferentantennasAntennaarraysimulationSmallarraysFeednetworksLargearraysActiveelementpatternOnlinedemo,.,42,Asmallselection.,.,43,AntennaSimulation,Differentantennatypesrequiredifferentsolvertechnologies.,.,44,TransientSolver,.,45,FrequencySolver,.,46,IntegralEquationSolver,.,47,阵列天线仿真基本方法,由单个天线计算天线阵；未考虑天线之间的耦合。由整体模型单独激励计算辐射场；计算涉及天线结构之间的影响。整体模型，同时激励；同时涉及结构和激励状态的影响。,.,48,计算模型,单个天线的设置,.,49,求解设置,.,50,求解设置,.,51,天线阵设置,.,52,计算结果,.,53,单独计算用后处理叠加,.,54,求解设置,频率设置与前面相同,.,55,求解设置,.,56,计算结果,.,57,计算结果,.,58,计算结果,.,59,计算结果,.,60,计算结果,.,61,设置后处理,.,62,计算结果,.,63,直接计算方式,模型、边界条件和场观察器等与前面的设置相同。,.,64,求解设置,.,65,计算结果,.,66,计算结果,.,67,AntennaArrays,.,68,SmallArrays,.,69,DistributedComputing(DC),.,70,MultipleElementExcitation,.,71,ArrayFeedingNetworks,.,72,LargeArrays,.,73,InfiniteArray,.,74,InfiniteArray,.,75,FarfieldArray,.,76,InfiniteArray,.,77,ActiveElementPattern,.,78,FiniteArrayAnalysis,.,79,CSTArrayWizard,.,80,Summary,.,81,用HFSS仿真阵列天线,.,82,序言,HFSS计算实际的阵列天线是基于阵列天线中的一个单元。对于模式驱动和端口驱动的设计，使用分布仿真过程。使你能够快速定义、显示和仿真阵列天线设计。,.,83,设计步骤,1.Drawtheunitcell,containingallappropriateboundariesandsourcedefinitions.2.Createtheantennaarray,includingname,dimensions,masterandslaveboundarieswhereneededforconformalmeshing,andselectionofrowandcolumnmaster/slavepairsforimplicitdefinitionoflatticepropagationvectors.Designatewhichcellsareactive,passive,andpadding.3.Setupthedistributedprocessorpool.DesignswitharraysrequireHPClicenses.4.ProvideamemorystatisticfortheamountofRAMguaranteedoneachDSOprocessor.,.,84,CreatingaUnitCellforanArray,Theunitcellcanberectangular,parallelogramorhexagonal.Youmustdefineappropriatemasterandslaveboundaries,aswellasotherboundariesrequiredforthemodel.Deletingamasterorslaveboundarythatisreferencedbyanexistingarrayalsodeletesthearray.Typically,youdefinemasterandslaveboundariesasoppositesidesofacell.,.,85,简单阵列的单元电路,Insuchcases,withmasterandslaveboundariesonoppositesides,thearraysidesalign.Inmakingsourcedefinitionsforunitcellfortheunitcell,youcannotassignaFloquetport.EachdrivenModalordrivenTerminaldesigncancontainasinglearray.,.,86,复杂阵列设置,However,youcanarrangemasterandslaveboundariestocreateanoffsetarray.Insuchcases,youcreatebothamasterandaslaveboundaryforcorrespondingsectionsofacellside,andassignmasterandslavetocreateoffsetalignment.Withallboundariesdefinedinthismanner,thearraycanbeoffset.,.,87,CreateArrayCommand,TheCreateArraycommandisenabledforModalandDrivenTerminalproblemsafteryouhaveassignedmasterandslaveboundariestoyourunitcellmodel.Youcanaccessthecommandinthreeways:clickHFSSModelCreateArray,right-clickontheModeliconintheProjecttreeandselectCreateArrayfromtheshortcutmenu,orselecttheunitcellinthemodelerwindow,andselectCreateArrayfromtheshort-cutmenu.ThisdisplaystheRegularPlanarArraydialogwhereyouspecifyparametersforNumberofCells,UnitCellPositionandLatticeVectors.,.,88,CreateArrayCommand,IfyouhaveVisibleenabled,youcanseeanychanges.ToDefineLatticeVectordirectionsforAandBVectors,specifythemasterboundary.Todefinethearraysize,fortheAandBvectors,specifythenumberofcellsforeachrowandcolumn,respectively.Forexample,thefollowingfigureshowstheresultswhentheinitialLatticeVectorsareswapped.tTocreateanirregulararray,selecttheActiveCellstab,selecttheradiobuttonforMousemakescellasPadding,.,89,CreateArrayCommand,Onceyouhavespecifiedtheparameters,theArrayobjectappearsintheProjecttreeundertheModel.OnlyoneArrayispermittedforamodel.TheCreateArraycommandisdisabledifanarrayisdefined.ByselectingtheArrayiconintheProjecttree,youright-clickfortheshortcutmenu.,.,90,CreateArrayCommand,SelectingDeleteremovesthearrayfromtheModel.SelectingPropertiesdisplaystheRegularPlanarArraydialog.SelectingVisualizeArrayletsyoutogglethearraydisplay.Acheckmarkindicatesthatthearrayisbeingdisplayed.WiththeArrayiconintheProjecttreeselected,ifyouhaveadockedPropertieswindowdisplayed,youcanseeandeditArrayProperties.AlleditsareundoableandinformationalmessageswillbepostedtotheMessagewindowwhendesigndataisdeleted.,.,91,SetupandRunanArraySimulation,ThereisnochangeintheGUIforsettinguptheadaptivesimulationfordesignswithanarray.However,thesolutionquantitiesofthevirtualcellswillbeavailableforconvergencesetup(Inbothadaptiveandinterpolatingsweep).TherearenochangesinthewayconvergenceinformationispresentedontheConvergencetaboftheSolutionDisplaypanel.Ifyourdesigncontainsavirtualarray,thesetupcanhavesomedifferences.EnableSolverDomainsshouldnotbechecked(theseareUIdefineddomains,notsolverdefineddomains).Setupthedistributedprocessorpool.DesignswitharraysrequireHPClicenses.GeneralSetupforVirtualArraySimulationforMatrixConvergence,ifyouchooseSelectedEntries.InterpolatingSweepAdvancedOptionsforArraySimulationFastsweepisnotsupported.,.,92,SetupandRunanArraySimulation,Youcanalsosetuptheexpressioncacheatsolvesetup.Theexpressioncacheinterfaceforaccessingarrayelementsisthesameasthoseusedinreportsetup.UsetheActiveCellstabontheRegularPlanarArraydialogtodesignatewhichcellsareactiveorpassiveforasimulation.YoucanmakeAllActive,AllPassiveorselectwhichcellsareactiveorpassive.Themoreactivecellsthereareforasimulation,themoreprocessingrequired.Bydefault,clickingthecorrespondingarrayelementstogglesthecurrentselection,YoucanalsochoosetheMousemakescellsettingtoclickforActiveorPassive,whicheverismostconvenient.Clickingonaroworcolumnnumberappliesthemouseclickcommandtoallcellsinthatroworcolumn.Draggingthecursorovercellsperformsthecurrentoperationonthem.,.,93,SetupandRunanArraySimulation,Itisimportanttounderstandtheimpactofpassiveportsonantennaparameters.Foracceptedpowercalculations,passiveportsarenotincludedwhencomputingthetotalpowerpassingthroughtheunionofallportsurfaces.Thismeansthatthepassiveportscanbeviewedasalossmechanismforthedeviceanditisnotequivalenttoviewingthepassiveportsasactiveportswithzeroexcitations.ReportsetupforArrays.Thesolution/matrixquantitiesaregroupedbycategory.Theentriesineachcategoryarelistedaccordingtotheirrow,columnorderinthecorrespondingmatrix.Theentryinrow1,column1willbelistedfirst,followedbyrow1,column2,row1,columnN,row2,column1,row2,columnN,rowN,columnN.Notethattherow,columnorderofeachentryinthematrixiscontrolledbytheMatrixorderasspecifiedbyuser.TheexistingFiltercapabilitycanhelplocatethedesiredquantityfromthepotentiallyverylonglist.,.,94,GeneralSetupforVirtualArraySimulation,ForaprojectwithanarraytheGeneralSetupsomedifferencesappearinhowyoucanspecifyMatrixconvergence.IfyouselectMatrixConvergence,andclickSetMagnitudeandPhase,youwillseetheMatrixconvergencedialog.IntheMatrixConvergencedialogue,ifforEntrySelectionyouchooseSelectedEntries,(ratherthanAllorDiagonal/OffDiagonal),youwillseescrollabledropdownmenusthatletyouselectfromallArrayelementstodefinepairsofMatrixentries.,.,95,InterpolatingSweepAdvancedOptionsforArrays,ForanInterpolatingSweepAdvancedOptions,ifyouselectUseSelectedEntries,clickingtheSelectEntriesbuttondisplaysanInterpolationBasisConvergencedialogthatliststheArrayelements.,NotethatthematrixentriesarelistedaccordingtotheMatrixSortOrderasspecifiedbyuser.EntrySelectioncanbeAll,Diagonal,orOff-Diagonal.ModeSelectioncanbeAll,DominantOnly,orHigher-OrderOnly.,.,96,ArrayVisualization,YoucontrolthevisualizationofanarraybyselectinganexistingArrayintheProjecttreeandtogglingtheVisualizeArraycommandontheshort-cutmenu.Virtualobjectsinanarraydisplayaswireframes.Iftheallvirtualobjectsforanarraydonotappearintheviewmodelerwindow,performaViewFitAlloperation.Ifyouchangetheview,youcanalsouseCtrl-Dtofitthearrayintothecurrentview.YoucandisablethearrayvisualizationbyclickingontheVisualizeArrayoptionagain.AcheckmarkappearsinfrontofVisualizeArrayiftheoptionisalreadyON.Thisoptionwillalsobepresentingeneralactiveviewvisibilityoptions,ViewActiveViewVisibility.,.,97,PostProcessingforArrayModels,Solutionquantitiesofbothphysicalandvirtualcellsareavailableforpost-processing.Radiationfields(nearandfar)postprocessingisoverthewholearray.Youcanplotandanimatefieldsonnon-modelcutplanes,vectors,andpoints,aswellasonselectedmodelobjectfaces.Anypaddingcellsinoraroundthearrayaretreatedasbackgroundmaterial.Youcanplotandanimatefieldsoncutplanes,vectors,andpoints.,YoucanusetheFieldscalculatortodefinecalculatedexpressions.HFSScanalsopostprocessindividualcellsinanarrayoneatatime.Youcanselectanarbitrarycellanddofieldspostprocessingonthatcell.HFSSpostprocessesonasingleuserselectedcellinthearray.ForPortFieldDisplaythereisnoGUIchange.Onlyphysicalports/terminalswillbelisted.Thereisnoneedtosupportvisualizationofuser-selectedcell(likefieldoverlayplot)becausethefieldpatternsofthevirtualmodesarethesameasthoseinthephysicalcells.,.,98,ReportsforArrays,TherearesomedifferencesintheReportsetupforArrays.1.Thesolution/matrixquantitiesaregroupedbycategory.Theentriesineachcategoryarelistedaccordingtotheirrow,columnorderinthecorrespondingmatrix.Theentryinrow1,column1willbelistedfirst,followedbyrow1,column2,row1,columnN,row2,column1,row2,columnN,rowN,columnN.Notethattherow,columnorderofeachentryinthematrixiscontrolledbytheMatrixorderasspecifiedbyuser.2.TheexistingFiltercapabilitycanhelplocatethedesiredquantityfromthepotentiallyverylonglist.,.,99,FieldPlotsforArrays,Youcangeneratefieldplotsonobjectfaces,aswellasonnon-modelplanes,lines,andpoints.Theplotsdisplaycalculatedfieldswhereevertheselectedgeometryintersectsthearraycellsbasedonwhetherthecellsareactive,passive,orpaddinginthearrayproperties.Locationsdesignatedaspaddingaretreatedasbackgroundmaterialinfieldcalculations.Thevirtualcellsdonotneedtobevisibletoaffectthegeneratedfieldplots.Youcanalsocreateanimationsoffieldplots.Iftheplottedgeometryiscontrolledbyasweptvariable(suchasplaneangleorapointlocation)t