HFSS-IE反射面仿真

2013/11/281反射面天线设计新方法向胜昭ANSYS高级应用工程师天线设计指标①天线扫描方式②天线工作频率③天线增益④天线尺寸限制⑤天线重量要求⑥天线波束覆盖⑦天线副瓣电平⑧天线极化形式⑨天线驻波……决定天线采用什么样的形式具体实现反射面？反射面天线应用分类反射面天线解决方案•“高增益、低副瓣、相控阵”反射面天线•难点：–ElectricallyLarge–HighAccuracy(Lowsidelobe,shelter)–Highcomplexity(Activematch,complicatedshelter)2013/11/282ElectricallyLarge高阶有限元＋高阶有限元＋迭代法矩阵求解器迭代法矩阵求解器场到场链接场到场链接(DataLink(DataLink))混合阶网格剖分混合阶网格剖分(MixedElementOrder)区域分解法区域分解法(DomainDecompositionMethod)曲面共形网格剖曲面共形网格剖分分（CurvilinearMeshing）……HFIEHFIE（高频积分方程法）混合全波分析PO混合……DishantennaSingleCell-ADKHighAccuracyUnitCell-FloquetSystem-cosimulationFiniteArray-HPC……Highcomplexity------VarietyofmethodsHighcomplexity•解决策略：–HFSS–HPC(DDM–domaindecompositionmethod)–HFSS-IE–HFSS+HFSS-IE(Datalink)–FE-BI(HybridMethod)–PO(MightaswelladdHFSS-IE)1.反射面天线的HFSS仿真2meter(40λ)2013/11/283精确可靠，快速易用•成熟可靠的有限元电磁场求解技术（适应性好，编程难度大）•自动化的共形网格生成，保持结构的细节特性•独有的自适应网格剖分•自动迭代给出满足精度要求的结果初始网格自适应加密后的网格三维高频结构全波仿真工具HFSSHFSS1.反射面天线HFSS仿真6GHzsolvefrequency2meterdish(40λ)11,280cubicλvolumeCPcircularhornfeedRantwocases:Single128GB,8core2meter(40λ)1.反射面天线HFSS仿真6hours53minutestocompleteadaptivepass194GBofRAMFellbacktothedirectsolver!2.HPC仿真反射面天线2meter(40λ)2013/11/284•Distributesmeshsub-domainstonetworkofprocessors•Distributedmemoryparalleltechnique•Significantlyincreasessimulationcapacity–64-bitmeshing•Highlyscalabletolargenumbersofprocessors•Multi-processornodescanbeutilizedHPCdistributesmeshsubdomainstonetworkedprocessorsandmemoryHPCforHFSSHPC的使用123456782.HPC仿真反射面天线•6GHzsolvefrequency•2meterdish(40λ)•11,280cubicλvolume•CPcircularhornfeed•Rantwocases:Sevenmixedmachines,28cores,72GB2meter(40λ)ANSYSTestComputersUsed1)4cores,8GB(sjc01)2)4cores,8GB(sjc02)3)4cores,8GB(sjc03)4)4cores,8GB(sjc05)5)4cores,8GB(sjc11)6)4cores,16GB(sjc09)7)4cores,16GB(falcon)Totalof7computers.28cores,72GBofRAM.AssembledlistofstandardworkstationstobeusedforHPC2.HPC仿真反射面天线2013/11/285CaseII:MixedMachinesDDMSplitinto22domainsonthefirstpass5domainsnotusedyet2.HPC仿真反射面天线20minutestocompleteadaptivepass1(21xfasterthansinglemachine)Nocoreusingmorethan2GBTotalmemoryuseis1/3ofsinglemachineUsing22/27domainsCPsourcePlottingcurrents2.HPC仿真反射面天线(Pass1)2.HPC仿真反射面天线Using27/27domains25minutestocompleteadaptivepass2Nocoreusingmorethan2GBCPsourcePlottingcurrents(Pass2)3.反射面天线的HFSS-IE仿真2013/11/286∫∫∫HFSS-IE•IE,whatisit?–A3DMethodofMoments(MoM)IntegralEquationtechnique•Automatedresultswithaccuracy–EffectiveutilizationofautomatedadaptivemeshingtechniquefromHFSS–EmploysAdaptiveCrossApproximation(ACA)techniqueforlargersimulation–ImplementedasanewdesigntypeintheHFSSdesktop•UtilizationofresultsfromHFSSasalinkedsource–Linkcanincludeeffectsofbackwardsscatteringtothesourcegeometry3.反射面天线HFSS-IE仿真CavitybackeddipolesourceParabolicdishparameterizedsuchthatthefocusisalwaysattheoriginPECsupportstruts,parameterizedtochangealongwiththeparabolicdishPhasecenterofthesourceissetatthefocus.3.反射面天线HFSS-IE仿真HFSS-IE可以使用的激励有三种:LumpedportterminalincidentwaveHFSS-IE不用设置辐射边界50λDiameter---0.25λstartingMesh15GHz;1meter(50λ)diameterreflector;Crosseddipolesourceandstruts96,778triangles2passes6.06GBRAM1hr23minsolve37minFFcalc.2hrTOTALruntime3.反射面天线HFSS-IE仿真2013/11/287Elapsedtimeheredoesnotincludepatterncalculationtime.Requestedonly2DcutsforthismodelwhichreducedFFcalc.time2hours(notshowninprofile).342,731triangles2passes24.7GBRAM13hr50minsolve2hrFFcalc.16hrTOTALruntime30GHz;1meter(100λ)diameterreflector;Crosseddipolesourceandstruts3.反射面天线HFSS-IE仿真100λDiameter---0.25λstartingMeshCouldreduceFFcalc.timebyonlyrequesting2Dcuts.947,548triangles1pass71.3GBRAM26hr49minsolve10hrFFcalc.37hrTOTALruntime60GHz;1meter(200λ)diameterreflector;Crosseddipolesourceandstruts3.反射面天线HFSS-IE仿真200λDiameter---0.25λstartingMesh3.反射面天线HFSS-IE仿真•Simulatedthreereflectorelectricaldiameters:AdaptivePassesRAMSolveTime(hh:mm)FFCalc.Time(hh:mm)TOTALRunTime(hh:mm)50λ26.1GB01:2300:37**02:00100λ224.7GB13:4302:00*15:43200λ171.3GB26:4910:04**36:53*Just2DcutsatPhi=0,45,90with0.125degthetaresolution**3Dand2Dspherecalculations3.反射面天线HFSS-IE仿真Surfacecurrentswhenthesourceisnotatthefocusoftheparabola.Notethecurrentdisruptionsatthestruts.50λdiameterdish2013/11/288•TurnedONadaptivemeshingforjust2totalpassesλ/4λ/8λ/10λ/12λ/203.反射面天线HFSS-IE仿真ReflectorwithStruts–WITHAdaptiveMeshing4.反射面天线：HFSS-IE&HFSS--Datalink4.反射面天线HFSS-IE&HFSS--Datalink•15个脊波导角锥馈源•偏馈反射面：下边长6395mm上边长4428mm，高4393mm•仿真频率:2GHz到4GHz4.反射面天线HFSS-IE&HFSS--Datalink-200.00-100.000.00100.00200.00Theta[deg]-40.00-30.00-20.00-10.000.0010.0020.00dB(DirTotal)AnsoftLLCFeed_allXYPlot1ANSOFTCurveInfodB(DirTotal)Setup1:LastAdaptiveFreq='4GHz'Phi='0deg'dB(DirTotal)Setup1:LastAdaptiveFreq='4GHz'Phi='90deg'2013/11/2894.反射面天线HFSS-IE&HFSS--Datalink•HFSS-IE和HFSS的数据链接•全自动,使用方便•高精度,场到场直接数据链接4.反射面天线HFSS-IE&HFSS--Datalink•反射面上的电流分布和网格剖分•由于仅有1,7,8角锥馈电,因而呈现左右非对称性4.反射面天线HFSS-IE&HFSS--Datalink•HFSS-IE自动读入HFSS仿真得到的馈源辐射场•只需计算反射面，无需在整个空间求解0.00125.00250.00375.00Theta[deg]-10.000.0010.0020.0030.0040.0050.00dB(rETotal)AnsoftLLCIEDesign1XYPlot1ANSOFTCurveInfodB(rETotal)Setup1:LastAdaptiveFreq='4GHz'Phi='0deg'dB(rETotal)Setup1:LastAdapt