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1、例题：角锥喇叭,建模尺寸,6in,4in,3in,5.16in,1.944,2.65,0.4in,0.9in,0.315in,Air box,Horn Antenna,The base of the Horn,一、创建工程,第一步：打开HFSS并保存新工程 打开 HFSS 软件后，自动创建一个新工程：Project1。由主菜单选 FileSave as，保存在指定的文件夹内，命名为horn。,一、创建工程,第二步：插入HFSS设计 由主菜单选 Project Insert HFSS Design，则一个新项目自动加入到工程树中，默认名 HFSSModel1。同时，在工程树的右侧出现绘图窗口。在
2、工程树中选择 HFSSModel1，点右键，选择 Rename项，将设计命名为 HornModel。,一、创建工程,第三步：选择求解类型 由主菜单选 HFSSSolution Type，在弹出对话窗选择Driven Model 项。,一、创建工程,第四步：设置单位：由主菜单选 3D ModelerUnits，在 Set Model Units 对话框中选中 in 项。,二、创建模型,Drawing the base of the Horn Click the Box icon or go to DrawBox.Enter the following values-0.2,-0.45,and 0
3、 for x,y and z,respectively and 0.4,0.9,0.315 for dx,dy,and dz,respectively The drawing is with respect to the origin(0,0,0).In other words,the base of the horn is drawn with the(0,0)as its center.,二、创建模型,Drawing the base of the Horn Type Base in the name field.Material assigned is vacuum and choose
4、 Color and Transparent at your preference.Click Ok.,二、创建模型,Drawing the base 2D Rectangle To create the“funnel”or tapering of the horn antenna,draw and connect Two rectangles,and then connect them to create the 3D funnel.Place the first rectangle on top of the 3D antenna base.,DrawRectangle.Now move
5、the cursor to one corner of the top of the antenna base,and click on it,then move the cursor to the opposite corner of the top of the antenna base and click again.The rectangle window is open.,Type funnel_base.Assignmaterial to be vacuum.Choose Color and Transparency of your preference.Click Ok.Note
6、 that the dimensions of the rectangle should match those of the top of theantenna base.,二、创建模型,Drawing the Horn Aperture Next,draw the 2D rectangle that represents the top of the funnel,or the aperture of the horn.,Click Rectangle icon or DrawRectangle.Type in the following values:0.972,1.325,5.475
7、for x,y and z,respectively.Then type the following values:-1.944 and-2.65 for dx and dy,respectively.,Type horn_top in the name field.Assign material tobe vacuum.Choose the Color and Transparency at you preference.Click Ok.,二、创建模型,Connecting 2D Objects to Create the Funnel Now you can connect the 2D
8、 objects that make up the base and the top of the funnel to create the 3D,funnel-shaped object.,Choose the horn_top and funnel_base from the Model tree by holding down the Ctrl key.Go to 3D Modeler Surface connect.Name it funnel.,Note that the object that is created as a result of connecting or unit
9、ing other objects can not be edited.When connecting 2D objects,for example,you can edit the original 2D objects,but you can not edit directly the 3D object that is the result of using the connect command.,二、创建模型,Uniting the horn base with the Funnel Although it is not strictly necessary,you will uni
10、te the two 3D objects-the horn base and the funnel,to create one 3D horn antenna structure.This makes the problem simpler by keeping the number of objects to a minimum.,Choose base and funnel from the list of 3D objects.Then 3D ModelerBooleanUnite.Then clink Ok.,二、创建模型,Drawing the 3D Air Box Around
11、the Horn Antenna To simulate the horn antenna,you need to enclose it in a bounded“box”of air.,Click Box icon or DrawBox.Type in the following values:-1.5,-2,and 0 for x,y,and z,respectively and 3,4,and 6 for dx,dy,and dz,respectively.Type AirBox in the name field,vacuum is the assigned material and
12、choose Color and Transparency at your preference.Click Ok.,三、设置边界条件和激励源,Choose the surfaces of the horn and assign Perfect E.All faces of the horn should be chosen except the top and the bottom.Then Boundaries right click Assign Perfect Eand name it PerfE_horn_sides.,三、设置边界条件和激励源,Assign radiation bo
13、undary to the air box.Choose the faces of the air box andBoundaries right-click AssignRadiation.Name it rad_air.,三、设置边界条件和激励源,Assign Excitation to the bottom face of the horn.Excitations WavePort.Name it WavePort1.,四、设置求解项并分析,Right-click Analysis,then Add Solution Setup.Set the following values:Solu
14、tion Frequency is 10 GHz,Maximum number of passes is 20,and Maximum Delta S per pass is 0.02.Leave every thing else as default.Click Ok.,四、设置求解项并分析,Now go to AnalysisSetup1 Add sweep.Set the values to the following:Sweep Type is fast,Frequency Setup type is Linear count,Start is 8 GHz,Stop is 12 GHz
15、 and Count is 100.,四、设置求解项并分析,Make sure to validate check.HFSSValidation Check.Run Analysis.HFSSAnalyze.,注意：此时会对边界和激励源的设置提出警告，忽略不计。,五、察看结果图,Right-Click ResultsCreate Report.Accept the Default values by clicking Ok.Make sure the following values are set as in Figure 6.Add Trace,then click Done.,五、察看结
16、果图,Creating a Far field PlotThe far field plot is a 3-D plot of the far-field radiation pattern.,Right-click Radiation,then choose Insert Far Field SetInfinite Sphere,五、察看结果图,Creating a Far field PlotThe far field plot is a 3-D plot of the far-field radiation pattern.,Right-click Results,then choose
17、 Create report.Set Report Type to Far Fields and Display type to 3D Polar.,五、察看结果图,Creating a Far field PlotThe far field plot is a 3-D plot of the far-field radiation pattern.,When Traces Window open,leave the values as set.Make sure it is the Last Adaptive in the Solution field and Geometry is InfiniteSphere1.,Under Sweep tab,make sure Phi is the primary sweep and Theta is the secondary sweep and all values are checked.,Make sure rE is picked under Category,rE Total under quantity and none under function.Click Add Trace,then Done.,
