HFSS的后處理及場計算器入門AnsoftHFSS的后處理（Results）

CreateReport可繪制圖形

Eigenmodesolution（本征模解）EigenmodeParameters(modes)（本征模參數(shù)圖形）DrivenModalSolution（驅(qū)動模式解）S-parameters（S參數(shù)圖形）Y-parameters（Y參數(shù)圖形）Z-parameters（Z參數(shù)圖形）VSWR（駐波比） Gamma(complexpropagationconstant)（復(fù)數(shù)形式的傳播常數(shù)）PortZo（端口波阻抗）DrivenTerminalSolution（終端驅(qū)動解）S-parameters（S參數(shù)圖形）Y-parameters（Y參數(shù)圖形）Z-parameters（Z參數(shù)圖形）VSWR（駐波比） Power（功率）VoltageTransformmatrix(T)（電壓傳輸矩陣）TerminalPortZo（端口波阻抗）可繪制圖形Fields(場)Mag_EMag_HMag_JvolMag_JsurfComplexMag_EComplexMag_HComplexMag_JvolComplexMag_JsurfLocal_SAR(SpecificAbsorptionRate)Average_SAR注：在繪制場圖前必須先選擇一個面或者一個多點線。AnsoftHFSS的后處理（Results）SolutionDataAnsoftHFSS的后處理（Results）OutputVariablesAnsoftHFSS的后處理（Fields）FieldsAnsoftHFSS的后處理（Radiation）RadiationHFSSFieldCalculator:DefinitionAtoolforperformingmathematicaloperationsonALL

savedfielddatainthemodeledgeometryE,H,J,andPoyntingdataavailablePerformoperationsusingdrawinggeometryornewgeometrycreatedinPost3Performoperationsatsinglefrequency(interpolatingordiscretesweeps)orotherfrequencies(fastsweep)Generatenumerical,graphical,geometricalorexportabledataMacro-enabled表達式操作區(qū)指定數(shù)據(jù)關(guān)聯(lián)場計算器操作區(qū)場計算器分區(qū)表達式操作區(qū)建立表達式使用“Add”鍵，由場計算器堆棧導(dǎo)入表達式；使用“LoadFrom”鍵，由場計算器表達式文件（*.clc）導(dǎo)入表達式；輸出表達式使用“Copytostack”鍵，將已存在的表達式導(dǎo)出到場計算器堆棧；使用“Saveto”鍵，將已存在的表達式保存成場計算器表達式文件（*.clc）；指定關(guān)聯(lián)區(qū)指定場計算器使用數(shù)據(jù)的出處。指定求解設(shè)置指定場類型；指定頻率指定相位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

色散特性模擬在的三維仿真軟件都能提供周期邊界條件(periodicboundarycondition)，或叫主-從邊界條件（master-slaveboundarycondition）。使用周期邊界條件仿真時只需要建一個螺旋周期的模型，并指定任意的相移

，利用三維仿真軟件的本征模求解器(eigenmodesolver)計算出最低模的諧振頻率

，通過下面的公式就可求出相速

。是空間基波的相位傳播常數(shù)，是螺旋線的螺距，是角頻率。改變指定的相移的數(shù)值，就可以得到一組對應(yīng)的的色散關(guān)系曲線。耦合阻抗模擬耦合阻抗是表征軸上縱向高頻電場與電子注進行相互作用大小的一個基本參量。耦合阻抗越高，則高頻場與電子注之間的能量交換越充分，對應(yīng)管子的增益和效率就越高。螺旋慢波系統(tǒng)由于其縱向的周期性，由弗洛奎定理可知存在縱向空間高次諧波，但能與電子注同步并發(fā)生有效相互作用的是空間諧波中的基波成分，所以我們一般只計算基波的耦合