对称振子和对称振子阵

例题：对称振子一、创建工程FromtheProjectManagerwindowRight-ClicktheprojectfileandselectSaveAsfromthesubmenu.Namethefile“dipole”andClickSave.一、创建工程Tobeginworkingwithgeometries,youmustinsertanHFSSdesign.Right-ClicktheprojectfileandselectInsert->InsertHFSSDesignfromthemenu.一、创建工程DuetothenatureofthisdesignwewilluseDrivenModalasthesolutiontype.FromtheHFSSmenuselectSolutionTypeandDrivenModal.Theunitsarechosenas

mmbychoosingtheheading3DmodelerandUnitsfromthemenu.二、创建模型HFSSreliesonvariablesforanyparameterization/optimizationwithintheproject.Variablesalsoholdmanyotherbenefitswhichwillmakethemnecessaryforallprojects.✔FixedRatios(length,width,height)areeasilymaintainedusingvariables.✔Optimetricsusevariablestooptimizethedesignaccordingtouser-definedcriteria.✔Alldimensionscanbequicklychangedinonewindowasopposedtoalteringeachobjectindividually.二、创建模型ClicktheHFSSheadingandselectDesignPropertiesatthebottomofthemenu.Thiswillopenthevariabletable.AddallvariablesshownbelowbyselectingAdd.Besuretoincludeunitsasneeded.二、创建模型WewillstartbycreatingthedipoleelementusingtheDrawCylinderbuttonfromthetoolbar.Choose3Arbitrarypointsinsidethedrawingarea.Thesepointswillbedefinedusingthevariablescreatedpreviouslysothereisnoneedtospecifypoints.Followtheformatbelowforstructuresize.Givethenamedip1

tothisobject.AssignthematerialPEC

andclickOK.PEC(PerfectElectricConductor)willcreateidealconditionsfortheelement.UndertheCommandtab,enterthefollowinginformation:二、创建模型Thenextcommandisessentialwhenbuildingsymmetricstructures.Right-ClickthedrawingareaandselectEdit>Duplicate>AroundAxis.二、创建模型Amirrorimageisproducedbyenterthefollowing:Thedipolestructureisillustratedbelow:三、创建集总端口激励InthesectiontheuserwillcreateaLumpedGapSource.Thiswillprovideanexcitationtothedipolestructure.BeginbyselectingtheYZplanefromthetoolbar.Usingthe3Dtoolbar,clickDrawRectangleandplacetwoarbitrarypointswithinthemodelarea.三、创建集总端口激励Enterthefollowing:ClicktheCommandtabandenterthefollowing:三、创建集总端口激励Pleasenotethatthevariablegap_srcwaschosenrelativelysmallincomparisontothedipolestructure.Thiswasdonetominimizeeffectsduetothesourceandplaceemphasisuponthestructure.Thesourceisdepictedbelow.三、创建集总端口激励Withthesourcegeometryinplace,theusermustprovideanexcitation.Alumpedportwillbeusedforthedipolemodel.Thisexcitationiscommonlyusedwhenthefarfieldregionisofprimaryinterest.Intheprojectexplorer,right-clickExcitation->Assign->LumpedPort.三、创建集总端口激励四、创建辐射边界Inthissection,aradiationboundaryiscreatedsothatfarfieldinformationmaybeextractedfromthestructure.Toobtainthebestresult,acylindricalairboundaryisdefinedwithadistanceofλ/4.Fromthetoolbar,selectDrawCylinderandchoose3arbitrarypointswithinthemodelwindow.四、创建辐射边界Enterthefollowing:ClicktheCommandtabandenterthefollowing:Assumingallstepswereproperlycompleted,theboundaryshouldresembletheillustrationbelow:四、创建辐射边界Withthegeometrycomplete,theactualradiationboundarymaynowbeassigned.Fromthe3Dtoolbarselectfacefromthedropdownwindowasshownbelow.Clickandselectallfacesasfollows:四、创建辐射边界Withallfacesselected,right-clicktheBoundaryiconintheobjectexplorerandselectBoundary->Assign->Radiation.LeavethedefaultnameRad1andclickOK.五、添加求解设置Inthissectionasolutionmustbedefinedtodisplaythedesireddata.Weareprimarilyinterestedinthefrequencyresponseofthestructure.WewillalsoexploreHFSS'sabilitytocalculategeneralantennaparameterssuchasdirectivity,radiationresistance,radiationefficiency,etc....Fromtheprojectexplorer,selectAnalysis->AddSolutionSetup.Enterthefollowing:Leaveallothersettingsasdefault.ClickOK

whencomplete.五、添加求解设置Toviewthefrequencyresponseofthestructure,afrequencysweepmustbedefined.FromtheprojectexplorerselectSetup1->AddSweep.Enterthefollowing:五、添加求解设置Atthispoint,theusershouldbereadytoanalyzethestructure.Beforerunningtheanalysis,alwaysverifytheprojectbyselectingfromthe3Dtoolbar.Ifeverythingiscorrecttheusershouldsee:AnalyzethestructurebyclickingAllow5-20minutesfortheanalysis,dependingonthemachine.六、创建结果Aftercompletionoftheanalysis,wewillcreateareporttodisplayboththe

resonantfrequencyandalsotheradiationpattern.ClickontheheadingHFSS

andselectResults->CreateReports.六、创建结果SelectthefollowinghighlightedparametersandclickAddTracetoload