cst出SAR结果的过程
SAR即英语“SpecificAbsorptionRate”的缩写，意为电磁波吸收比值或比吸收率。是手机或无线产品之电磁波能量吸收比值，其定义为：在外电磁场的作用下，人体内将产生感应电磁场。简单记录下用cst出SAR结果的过程1、fieldmonitor里设置SAR2、仿真完成之后，在post-processing中resulttemplatestools---选择2d3d场结果再选择sar3、计算sarSAR值一般指手机产品中电磁波所产生的热能，它是对人体产生影响的衡量数据，单位是W/Kg（瓦/公斤）。美国联邦传播委员会（FCC）所公布行动电话的安全标准值为1.6，因此只要行动电话的SAR值在1.6以下，都是在安全标准内的产品。SAR值表示行动电话的热能会对人体会造成多少影响，数值越大，表示对人体的影响越大；反之则影响较小。ps：csthelp文档中关于SAR的描述DefinitionTheSpecificAbsorptionRate(SAR)isdefinedasthetimederivativeoftheincrementalenergy(dW)absorbedby(dissipatedin)anincrementalmass(dm)containedinavolumeelement(dV)ofagivenmassdensity(r).TheSARvalueisexpressedinunitsofwattsperkilogram(W/kg).ThePowerLossDensity(PLD)valueisexpressedinunitsofwattspercubicmeter(W/m^3).SARcalculationCSTMICROWAVESTUDIOofferswhole-body-averagedandlocalSARvalues:Whole-body-averagedSAR:Thevalueisobtainedbydividingthetotalpowerabsorbedinthehumanbodybythefullbodyweight.Itisalsopossibletodefineasubvolumebypicksorbynumbers.LocalSAR:SARisgivenasanumericalvaluepervolumeelementandbecomesaspacedistributionfunction.Forthisfunction,themassmeanvalueinarbitrarytissuevolumeiscalledlocalSAR.TypicallocalSARvaluesareaveragedintissuemassesofaround10gspecifiedbytheTelecommunicationTechnologyCouncilAgendaNo.89andCENELEC1995,whereasthevalueof1gisadoptedbyANSI/IEEEC95.1-1992oftheUnitedStates.Acuboidaveragingvolumeisused.SARresultfileTheSARresultsfilecanbeaccessedintheSARcalculationdialogandbyclickingEdit->InfowhiletheSARfieldresultisselectedintheNavigationTree.Itcontainsthefollowing:Powerscaling:IndicatesifthewholeSARresultisrescaledtoauserdefinedpower.StimulatedPower:InputpoweroftheSARcalculation.AcceptedPower:InputpoweroftheSARcalculationwithoutreflectionlosses.Sys.StimulatedPower:Stimulatedpowerofthecircuitexcitation(ifused).Sys.AcceptedPower:Acceptedpowerofthecircuitexcitation(ifused).ARfilterresults:IndicatestheavailabilityofARfilterbalanceresults.Powerlossdensitymonitorused:NameandfrequencyofthepowerlossdensitymonitorusedtocalculatethisSARresults.Averagecellmass:Theaveragemassofallgridcellswhichcontainmaterialwithmassdensity(rho)greaterzero.Averagingmethod:ThemethodusedtocalculatespatialaveragedSARifnotPointSARhasbeencalculated.Averagingmass/Averagingvolume:Themassoftheaveragingcubeusedforspatialaveraging.If"Constantvolume"hasbeenchoosenasaveragingmethod,thevolumeofthecubeisgiven.IfPointSARhasbeencalculated,zeroisoutput.EntireVolume/SelectedVolume:Thefollowingvaluesapplytotheentirecalculationdomainortheselectedsubvolumerespectively.Min/Max/Volume:Thespatialdimensionsandthevolumeofthecalculationdomainorsubvolumerespectively.Absorbedpower:Thetotalpowerabsorbedinbiologicaltissueandotherlossynormalmaterial.Pleasenotethatlossymetalisnotincluded.Tissuevolume/Tissuemass:Thevolumeandmassofthebiologicaltissuecontainedintheentirecalculationdomainorsubvolumerespectively.Tissuepower:Thepowerabsorbedinbiologicaltissue(allmaterialwithmassdensitygreaterzero).Averagepower:Theaveragepowerabsorbedinbiologicaltissue(allmaterialwithmassdensitygreaterzero).TotalSAR:Thetissuepowerdividedbythetissuemass.Max.pointSAR:ThemaximumpointSARofallgridcells.Foreachgridcell,itspointSARiscalculatedbyitsabsorbedpowerdividedbyitsmass.MaximumSAR:ThemaximumofthespatiallyaveragedSARforthegivenaveragingmass.ForpointSARcalculations,theaveragingmassisdenotedaszero.Maximumat:Thespatialpositionoftheabovemaximum.Avg.vol.min/Avg.vol.max:Givesthedimensionsandpositionoftheaveragingcubeusedfortheabovemaximum.Notethatifstatisticsforboththeentireandtheselectedvolumeareoutput,theaveragingcubeisonlyoutputfortheselectedvolume.Largestvalidcube:Edgelengthofthelargestvalidaveragingvolume.Smallestvalidcube:Edgelengthofthesmallestvalidaveragingvolume.Avg.Vol.Accuracy:VolumeaccuracyoftheaveragingcubesusedforinSARcalculation.Calculationtime:TimeusedfortheSARcalculation.TLMSARCalculationTheTLMsolverhasalegacybuilt-inSARcalculatorthatcalculatespointSARandSARaveragedover1gand10gwhenaPowerlossdensityfieldmonitorhasbeendefined.Thiscalculationisnotcompliantwithrecentstandards.TheaverageSARcalculatedforacellisconsideredinvalidifthediscretizedaveragingregionthatisgrownaroundthatcellincludesmorethan10%airorthecentreofeverycellonanysinglefaceoftheaveragingregioniscompletelyinair.IfthecalculatedaverageSARforacellisconsideredinvalidthenthemaximumSARcalculatedforanycellwhoseaveragingregionenclosestheinvalidcellwillbetakeninstead.PBAisnotconsideredwhencalculatingthevolumeofeachcellinthisaveragingregion,wholeCartesiancellsareassumed.来源：灵境地平线
