HFSS的后处理及场计算器入门

HFSS的后处理及场计算器入门AnsoftHFSS的后处理（Results）

CreateReport可绘制图形

Eigenmodesolution（本征模解）EigenmodeParameters(modes)（本征模参数图形）DrivenModalSolution（驱动模式解）S-parameters（S参数图形）Y-parameters（Y参数图形）Z-parameters（Z参数图形）VSWR（驻波比） Gamma(complexpropagationconstant)（复数形式的传播常数）PortZo（端口波阻抗）DrivenTerminalSolution（终端驱动解）S-parameters（S参数图形）Y-parameters（Y参数图形）Z-parameters（Z参数图形）VSWR（驻波比） Power（功率）VoltageTransformmatrix(T)（电压传输矩阵）TerminalPortZo（端口波阻抗）可绘制图形Fields(场)Mag_EMag_HMag_JvolMag_JsurfComplexMag_EComplexMag_HComplexMag_JvolComplexMag_JsurfLocal_SAR(SpecificAbsorptionRate)Average_SAR注：在绘制场图前必须先选择一个面或者一个多点线。AnsoftHFSS的后处理（Results）SolutionDataAnsoftHFSS的后处理（Results）OutputVariablesAnsoftHFSS的后处理（Fields）FieldsAnsoftHFSS的后处理（Radiation）RadiationHFSSFieldCalculator:DefinitionAtoolforperformingmathematicaloperationsonALL

savedfielddatainthemodeledgeometryE,H,J,andPoyntingdataavailablePerformoperationsusingdrawinggeometryornewgeometrycreatedinPost3Performoperationsatsinglefrequency(interpolatingordiscretesweeps)orotherfrequencies(fastsweep)Generatenumerical,graphical,geometricalorexportabledataMacro-enabled表达式操作区指定数据关联场计算器操作区场计算器分区表达式操作区建立表达式使用“Add”键，由场计算器堆栈导入表达式；使用“LoadFrom”键，由场计算器表达式文件（*.clc）导入表达式；输出表达式使用“Copytostack”键，将已存在的表达式导出到场计算器堆栈；使用“Saveto”键，将已存在的表达式保存成场计算器表达式文件（*.clc）；指定关联区指定场计算器使用数据的出处。指定求解设置指定场类型；指定频率指定相位HFSSFieldCalculator:BasicLayoutStackOperations:ButtonformanipulatingstackDatastack:Containscurrentandsavedentriesinascrollingstacksimilartoahand-heldscientificcaculator.CalculatorFunctions:Orgnizedgroupingsofalltheavaliablecalculatorfunctionsinbuttonformat.Somebuttonscontainfurtheroptionsasdrop-downmenusStatusBar(notcurrentlyshown):HFSSFieldCaculator:DataTypesThecalculatiorvcanmanipulatemanydifferenttypesofdataGeometricComplexVectorScalarDatatypesareindicatedinthecalculatorstackforeachentryMostcalculatoroperationsareonlyavailableontheappropriatedatatype(s)GeometricsurfacegeneratedalongEfieldiso-valuecontourVectordataoutputtoaplanegeometryScalarE-fielddatagraphedalongalinegeometryHFSSFieldCalculator:DataIndicatorsEachstackentrywillbeprecededbyauniquecodedenotingitsdatatypeMathematical:CVc:ComplexVectorVec:VectorCSc:ComplexScalarScl:ScalarGeometric:Pnt:PointLin:LineSrf:SourfaceVol:VolumeCombinationscanalsoexistE.g.“SclSrf”:ScalardatadistributedonaSurfacegeometryCACULATORUSAGEHINT:Mostdatainputtypeswillbeself-explanatory,e.g.EandHfieldsbeingphasorquantitieswillbeComplexVector(CVc).TheonlyexceptiontothisruleisthePoyntinginput,Whichwillshowupasa“CVc”eventhoughEXH*shouldhavenoimaginarycomponent.Thecalculatoronlyknowsthattwocomplexvectorwerecrossed,anddoesnotknowaheadoftimethattheimaginarycomponenthasbeenzeroed.HFSSFieldCalculator:DetailLayout-StackAsdataisenteredintothecalculatoritappearsattheTOPofthestack,pushingolderentriesDOWNUNDOattemptstotakebackthelastoperationbetweenstackenties.Itmaynotworkforalldatatypes(e.g.theresultofapuremathoperationcannotbereversed)CLEARdeletesALLentriesfromthestackuponconfirmationEXCHexchangesorswapsthetoptwostackentriesPUSHduplicatesthetopstackentryPOPdeletesthetopentryoffthestackRLDN“rolls”thestackdownward,movingthetopentrytothebottomRLUP“rolls”thestackupward,movingthebottomentrytothetopHFSSFieldCalculator:DetailLayout-OperationsSCALARcolumnoperationscanonlybeperformedonScalardata(notcomplexorvectordata),suchasfindingtheCosineofavalueusingthetrigfunctions.OUTPUTcolumnoperationsresultinthegenerationofcalculatoroutputs,ineithernumerical,graphical(displayedas2Dgraphsorinthe3Dview),orexportedform.VECTORcolumncontainsoperationstobeperformedonvectordatasuchasconvertingtoscalar,DotandCrossproducts,andUnitVectorcomputationsGENERALcolumncontainsoperationswhichcanbeperformedonmanydatatypes(e.g.addingscalarvaluesoraddingvectors)INPUTcolumncontainalloperationswhichinputnewdataintothestack(fielddata,constant,user-enteredvectororcomplexnumbers,etc.Allcalculatoroperationsareorgnizedintocolumnsclassifyyingthembythetypeofoperationandthetypeofthedatauponwhichtheoperationcanbeperformed.HFSSFieldCalculator:DetailLayout-ExplodedViewHFSSFieldCalculator:Usage-OverviewUsejustlikeascientificcalculatorSimilartoHPscientificcalculators“FirstQuantity”,”SecondQuantity”Then“Operation”RememberstackfillsfromtheTopandpushesoldercontentsbelow.GeneraluseprogressesfromlefttorightInputquantityorquantitiesatleftPerformoperationsinmiddleOperatebetweenquantities;applyquantitiestogeometries,etc.Definedesiredoutputtypeatright.CalculatorUsageHINT:

AnyTimeyouusethefieldpost–processortoplotaquantity(PlotFields),youareactuallyperformingoperationsusingthecalculator!!Toseethestepsthatwentintothegeneratingtheplotyoujustcreated,openthecalculatorinterfaceandviewthestackcontents.Thiscanoftenhelpguideyouasyoutrytousethecalculatortocreatedyourowncustomoutputs.HFSSFieldCalculator:Usage-ChangingDataTypesAsdiscussedpreviously,Manyoperationsmustbeonthecorrectdatatype.Manyoperationsresultinadifferentdatatypethantheinputs.Ex1:TheDot

productoftwoVectorisaScalar.Ex2:ObtainingtheUnitVec

NormaltoaSurfGeneratesaVector.Somecalculatorbuttonsexistprimarilytoassistintypeconversion.Vec?ConvertsScltoVecdataScal?DoesthereverseCmplx

RealorCmplx

ImagtakesaSclcomponentfromaCScorCVc.Cmplx

CmplxRorCmplx

CmplxItakeaVecorSclcomponentandmakeittherealorimaginarypartofacomplexvalueCVcorCSc,respectively.Alwaysthinkofwhattypeofdatayouareworkingwithandwhetherornotitiscompatiblewithyourdesiredoperation.Forexample,nottheINTEGRALsignisintheScalarcolumn,implyingthattointegratecomplexnumbersyouwillhavetointegratetherealandimaginarycomponentsseparately,performinganintegrationbyparts.HFSSFieldCalculator:Usage-InputTypesTheavailablefieldinputsareE:ThecomplexvectorEfielddataeverywhereinthemodeledgeometry;H:ThecomplexvectorHfielddataeverywhereinthemodeledgeometry;Poynting:Thetime-averagePoyntingvectorcomputedfromaboveas(E×H*):Jvol:Currentdensityinavolume,computedas(σ+jωε”)Ewhichcontainbothconductionanddisplacementcurrent;Jsurf:Netsurfacecurrentcomputedasn×(H|toptetrahedra-H|bottomtetrahedra):Unlikeotherquantities,Jsurfcanonlybeoutputonanobjectsurfacegeometry.EHJsurfJvolPoyntingEandHarePeakPhasorrepresentationofthesteadystatefields.ThereforethecurrentrepresentationJderivedfromn×HorσEarealsopeakphasorquantities.ThePoyntingVectorinputisatime-averagedquantity.HFSSFieldCalculator:Usage-OutputTypesDifferentdataoutputcanbegenerateddependingonselectedOutputcolumnbuttonandstackcontent(s):Valueisusedtotakethe“value”ofafieldstackentryonaspecificgeometry;Evalturnstackplaceholdertextintofinalnumericalanswer;WriteandExportoutputsstackdatatooutputfileformatsforuseoutsidethecalculatororcurrentproject.HFSSFieldCalculator:Usage-PossibleOperationsAslongasyoucanperformthemathusingtheinterface,thereisnorestrictiononthepossiblecalculatoroperationsavailable:Outputsderivedcanbeotherthan“Electromagnetic”innature;PureGeometricoperations(vectorandsurfacecrossanddotproducts,generationofiso-surfacecontoursfromanyscalardatafieldimportedintothegeometry,etc)Thermalheatingcomputationsderivedfromfieldvaluescombinedwiththermalmasscharacteristicsandequations;IntegrationstoobtainsummaryquantitiessuchasQuanlityfactors,powerdissipationorflux,etc.Post-ProcessorExercise:HelixInteractionImpedance:CalculatingPointCutPlaneβZ=2π/λgλg=vp/f

色散特性模拟在的三维仿真软件都能提供周期边界条件(periodicboundarycondition)，或叫主-从边界条件（master-slaveboundarycondition）。使用周期边界条件仿真时只需要建一个螺旋周期的模型，并指定任意的相移

，利用三维仿真软件的本征模求解器(eigenmodesolver)计算出最低模的谐振频率

，通过下面的公式就可求出相速

。是空间基波的相位传播常数，是螺旋线的螺距，是角频率。改变指定的相移的数值，就可以得到一组对应的的色散关系曲线。耦合阻抗模拟耦合阻抗是表征轴上纵向高频电场与电子注进行相互作用大小的一个基本参量。耦合阻抗越高，则高频场与电子注之间的能量交换越充分，对应管子的增益和效率就越高。螺旋慢波系统由于其纵向的周期性，由弗洛奎定理可知存在纵向空间高次谐波，但能与电子注同步并发生有效相互作用的是空间谐波中的基波成分，所以我们一般只计算基波的耦合