反射面天线仿真.ppt

阵列天线仿真 ArrayOverview AnalysisApproaches UnitCellAnalysiswithMaster SlaveBoundaries UnitCellSimplification Master SlaveBoundaries UnitCellCreation VerifyingtheUnitCellGeometry FloquetPortsOverview FloquetModeVisualization FloquetPorts DeterminingtheModestoInclude ModesCalculator FloquetPortSetup FloquetPortSetup WhatiftheLatticeisTriangular FloquetPortSetup FloquetPortSetup FloquetPortSetup Results MatrixData Results ReturnLoss InsertionLoss FiniteArrayAnalysis ChallengesforLargeFiniteArrayModeling DomainDecompositionOverview Solution FiniteArrayDomainDecomposition FiniteArrayDDMToolAdvantages HowItWorks HowItWorks HowItWorks HowItWorks ProbeFedPatchArraywithFeedNetwork FinitePhasedArraySetupUsingDDM UnitcellisanalyzedtocreatemeshUnitcellmeshisthenreplicatedtoformremainingelementsinthearray MutualCouplingData ActiveReturnLosswithPhaseTaper EmbeddedElementPatterns ArrayPatternintheE Plane ArrayhasnophaseshifttapersothebeamispointedtowardboresiteSidelobeLevelsare 10 86dBand 13 23dBintheE HPlanes ArrayPatternScannedto45ointheE Plane ExplicitlySolvedPatchArrayvs DDMComparison 用CSTMicrowaveStudio仿真阵列天线 Outline AntennasimulationDifferentsolversfordifferentantennasAntennaarraysimulationSmallarraysFeednetworksLargearraysActiveelementpatternOnlinedemo Asmallselection AntennaSimulation Differentantennatypesrequiredifferentsolvertechnologies TransientSolver FrequencySolver IntegralEquationSolver 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 计算模型 单个天线的设置 求解设置 求解设置 天线阵设置 计算结果 单独计算用后处理叠加 求解设置 频率设置与前面相同 求解设置 计算结果 计算结果 计算结果 计算结果 计算结果 设置后处理 计算结果 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 求解设置 计算结果 计算结果 AntennaArrays SmallArrays DistributedComputing DC MultipleElementExcitation ArrayFeedingNetworks LargeArrays InfiniteArray InfiniteArray FarfieldArray InfiniteArray ActiveElementPattern FiniteArrayAnalysis CSTArrayWizard Summary 用HFSS仿真阵列天线 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 设计步骤 1 Drawtheunitcell containingallappropriateboundariesandsourcedefinitions 2 Createtheantennaarray includingname dimensions masterandslaveboundarieswhereneededforconformalmeshing andselectionofrowandcolumnmaster slavepairsforimplicitdefinitionoflatticepropagationvectors Designatewhichcellsareactive passive andpadding 3 Setupthedistributedprocessorpool DesignswitharraysrequireHPClicenses 4 ProvideamemorystatisticfortheamountofRAMguaranteedoneachDSOprocessor CreatingaUnitCellforanArray Theunitcellcanberectangular parallelogramorhexagonal Youmustdefineappropriatemasterandslaveboundaries aswellasotherboundariesrequiredforthemodel Deletingamasterorslaveboundarythatisreferencedbyanexistingarrayalsodeletesthearray Typically youdefinemasterandslaveboundariesasoppositesidesofacell 简单阵列的单元电路 Insuchcases withmasterandslaveboundariesonoppositesides thearraysidesalign Inmakingsourcedefinitionsforunitcellfortheunitcell youcannotassignaFloquetport EachdrivenModalordrivenTerminaldesigncancontainasinglearray 复杂阵列设置 However youcanarrangemasterandslaveboundariestocreateanoffsetarray Insuchcases youcreatebothamasterandaslaveboundaryforcorrespondingsectionsofacellside andassignmasterandslavetocreateoffsetalignment Withallboundariesdefinedinthismanner thearraycanbeoffset CreateArrayCommand TheCreateArraycommandisenabledforModalandDrivenTerminalproblemsafteryouhaveassignedmasterandslaveboundariestoyourunitcellmodel Youcanaccessthecommandinthreeways clickHFSS Model CreateArray right clickontheModeliconintheProjecttreeandselectCreateArrayfromtheshortcutmenu orselecttheunitcellinthemodelerwindow andselectCreateArrayfromtheshort cutmenu ThisdisplaystheRegularPlanarArraydialogwhereyouspecifyparametersforNumberofCells UnitCellPositionandLatticeVectors CreateArrayCommand IfyouhaveVisibleenabled youcanseeanychanges ToDefineLatticeVectordirectionsforAandBVectors specifythemasterboundary Todefinethearraysize fortheAandBvectors specifythenumberofcellsforeachrowandcolumn respectively Forexample thefollowingfigureshowstheresultswhentheinitialLatticeVectorsareswapped tTocreateanirregulararray selecttheActiveCellstab selecttheradiobuttonforMousemakescellasPadding CreateArrayCommand Onceyouhavespecifiedtheparameters theArrayobjectappearsintheProjecttreeundertheModel OnlyoneArrayispermittedforamodel TheCreateArraycommandisdisabledifanarrayisdefined ByselectingtheArrayiconintheProjecttree youright clickfortheshortcutmenu CreateArrayCommand SelectingDeleteremovesthearrayfromtheModel SelectingPropertiesdisplaystheRegularPlanarArraydialog SelectingVisualizeArrayletsyoutogglethearraydisplay Acheckmarkindicatesthatthearrayisbeingdisplayed WiththeArrayiconintheProjecttreeselected ifyouhaveadockedPropertieswindowdisplayed youcanseeandeditArrayProperties AlleditsareundoableandinformationalmessageswillbepostedtotheMessagewindowwhendesigndataisdeleted SetupandRunanArraySimulation ThereisnochangeintheGUIforsettinguptheadaptivesimulationfordesignswithanarray However thesolutionquantitiesofthevirtualcellswillbeavailableforconvergencesetup Inbothadaptiveandinterpolatingsweep TherearenochangesinthewayconvergenceinformationispresentedontheConvergencetaboftheSolutionDisplaypanel Ifyourdesigncontainsavirtualarray thesetupcanhavesomedifferences EnableSolverDomainsshouldnotbechecked theseareUIdefineddomains notsolverdefineddomains Setupthedistributedprocessorpool DesignswitharraysrequireHPClicenses GeneralSetupforVirtualArraySimulationforMatrixConvergence ifyouchooseSelectedEntries InterpolatingSweepAdvancedOptionsforArraySimulation Fastsweepisnotsupported SetupandRunanArraySimulation Youcanalsosetuptheexpressioncacheatsolvesetup Theexpressioncacheinterfaceforaccessingarrayelementsisthesameasthoseusedinreportsetup UsetheActiveCellstabontheRegularPlanarArraydialogtodesignatewhichcellsareactiveorpassiveforasimulation YoucanmakeAllActive AllPassiveorselectwhichcellsareactiveorpassive Themoreactivecellsthereareforasimulation themoreprocessingrequired Bydefault clickingthecorrespondingarrayelementstogglesthecurrentselection YoucanalsochoosetheMousemakescellsettingtoclickforActiveorPassive whicheverismostconvenient Clickingonaroworcolumnnumberappliesthemouseclickcommandtoallcellsinthatroworcolumn Draggingthecursorovercellsperformsthecurrentoperationonthem SetupandRunanArraySimulation Itisimportanttounderstandtheimpactofpassiveportsonantennaparameters Foracceptedpowercalculations passiveportsarenotincludedwhencomputingthetotalpowerpassingthroughtheunionofallportsurfaces Thismeansthatthepassiveportscanbeviewedasalossmechanismforthedeviceanditisnotequivalenttoviewingthepassiveportsasactiveportswithzeroexcitations ReportsetupforArrays Thesolution matrixquantitiesaregroupedbycategory Theentriesineachcategoryarelistedaccordingtotheir row column orderinthecorrespondingmatrix Theentryin row1 column1 willbelistedfirst followedby row1 column2 row1 columnN row2 column1 row2 columnN rowN columnN Notethatthe row column orderofeachentryinthematrixiscontrolledbythe Matrix orderasspecifiedbyuser Theexisting Filter capabilitycanhelplocatethedesiredquantityfromthepotentiallyverylonglist GeneralSetupforVirtualArraySimulation ForaprojectwithanarraytheGeneralSetupsomedifferencesappearinhowyoucanspecifyMatrixconvergence IfyouselectMatrixConvergence andclickSetMagnitudeandPhase youwillseetheMatrixconvergencedialog IntheMatrixConvergencedialogue ifforEntrySelectionyouchooseSelectedEntries ratherthanAllorDiagonal OffDiagonal youwillseescrollabledropdownmenusthatletyouselectfromallArrayelementstodefinepairsofMatrixentries InterpolatingSweepAdvancedOptionsforArrays ForanInterpolatingSweepAdvancedOptions ifyouselectUseSelectedEntries clickingtheSelectEntriesbuttondisplaysanInterpolationBasisConvergencedialogthatliststheArrayelements NotethatthematrixentriesarelistedaccordingtotheMatrixSortOrderasspecifiedbyuser EntrySelectioncanbeAll Diagonal orOff Diagonal ModeSelectioncanbeAll DominantOnly orHigher OrderOnly ArrayVisualization YoucontrolthevisualizationofanarraybyselectinganexistingArrayintheProjecttreeandtogglingtheVisualizeArraycommandontheshort cutmenu Virtualobjectsinanarraydisplayaswireframes Iftheallvirtualobjectsforanarraydonotappearintheviewmodelerwindow performaView FitAlloperation Ifyouchangetheview youcanalsouseCtrl Dtofitthearrayintothecurrentview YoucandisablethearrayvisualizationbyclickingontheVisualizeArrayoptionagain AcheckmarkappearsinfrontofVisualizeArrayiftheoptionisalreadyON Thisoptionwillalsobepresentingeneralactiveviewvisibilityoptions View ActiveViewVisibility 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 ReportsforArrays TherearesomedifferencesintheReportsetupforArrays 1 Thesolution matrixquantitiesaregroupedbycategory Theentriesineachcategoryarelistedaccordingtotheir row column orderinthecorrespondingmatrix Theentryin row1 column1 willbelistedfirst followedby row1 column2 row1 columnN row2 column1 row2 columnN rowN columnN Notethatthe row column orderofeachentryinthematrixiscontrolledbythe Matrix orderasspecifiedbyuser 2 Theexisting Filter capabilitycanhelplocatethedesiredquantityfromthepotentiallyverylonglist FieldPlotsforArrays Youcangeneratefieldplotsonobjectfaces aswellasonnon modelplanes lines andpoints Theplotsdisplaycalculatedfieldswhereevertheselectedgeometryintersectsthearraycellsbasedonwhetherthecellsareactive passive orpaddinginthearrayproperties Locationsdesignatedaspaddingaretreatedasbackgroundmaterialinfieldcalculations Thevirtualcellsdonotneedtobevisibletoaffectthegeneratedfieldplots Youcanalsocreateanimationsoffieldplots Iftheplottedgeometryiscontrolledbyasweptvariable suchasplaneangleorapointlocation theanimationdisplaysthecorre