偶极子天线设计

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偶极子天线的设计 步骤很完整!
Creating the project From the Project Manager window Right-Click the project file and select ③ ave as from the sub menu. Name the file“ dipole” and click save Insert R如 luyeUIuseu Defi iLL To begin working with geometries, you must insert an HFss design Right- Click the project file and select Insert - Insert HFSS Design from the menu {" Insert Documen: a ion fi ose H sa Ctr+ Remove Unused definitions Note Always create a personal folder to store all HFSS projects. You may find that you do not have access rights to some portions of the hard drive. This will also allow the user to quickly backup/copy data from projects Variable definition Due to the nature of this design we will use Driven Modal as the solution type From the HFSS menu select Solution Type and Driven Modal. The units are chosen as mm by choosing the heading 3D modeler and Units from the menu HFSS Tools Window Help SurFace Solution Type. Boolean 3螺 alidation che水 Units le Edit Notes Measure HFSS relies on variables for any parameterization /optimization within the project. Variables also hold many other benefits which will make them necessary for all projects y Fixed Ratios(length, width, height) are easily maintained using variables Optimetrics use variables to optimize the design according to user-defined criteria y All dimensions can be quickly changed in one window as opposed to altering each object individually Click the HFSS heading and select Design Properties at the bottom of the menu Boundary display (Solver View) Design Proper ties. Variable definition This will open the variable table Add all variables shown below by selecting Add. be sure to include units as needed Properties:dipolel-HF5SModell Local variable C Valuc C Optimization Tuning C Sensitivity 卜.dE Uril Dey_lilu RieauburlyHidueTl radiskicnraddip-rad+lamba/41 gth 2(cap src:/2 radiaticn height gap_src/2+ dip length+ lambda/0 175lambca y Show hidden dd K Note Creating variables before defining the structure will allow the user to build the geometry much faster than using a fixed system Creating the model The 3D Modeler toolbars play a vital role in the creation of geometric structures within HFSS. By default, the 3D modeler toolbars should be visible on the screen If you cannot locate the toolbar then right-click on the upper border of the form and select them from the drop down menu 》口6日间△C③芦则°43 We will start by creating the dipole element using the Draw Cylimder button from the toolbar. Choose 3 Arbitrary points inside the drawing area. these points will be defined using the variables created previously so there is no need to specify points Follow the format below for structure size. Give the name dip 1 to this object Assign the material PEC and click OK. PEC(Perfect Electric Conductor) will create ideal conditions for the element roperties: dipolel-HFSSModell-3D Modeler Command Attribute Nan dip1 Global ccor 厂 show Hidden Creating the Model Under the Command tab, enter the following information Atuaute Commend a Imr, gap The next command is essential when building symmetric structures. Right Click the drawing area and select Edit -> Duplicate - Around AXis All Object Faces pleasure Edit +E C>py Assign excitant Assign plesh operat on F用 Along ine Duplicate Mirror boole Sweep Creating the Model A mirror image is produced by enter the following rate Around uis Angle 180deg eg G Tota number:2 UK Cancel The dipole structure is illustrated below Ideally, the structure is one solid geometry. a slot has been created at the origin in this example. This will allow later placement of a source for excitation Creating the port In the section the user will create a Lumped Gap Source. This will provide an excitation to the dipole structure. Begin by selecting the Yz plane from the toolbar. Using the 3D toolbar, click Draw Rectangle and place two arbitrary points within the model area B四‖ In plane |4 ○∞E Draw rectangle Enter the following ruperlies: uipule1-HFSSMuuel1-SD Muut I Command Attitute Name Yalu Deccip: o Read-cnly SO.ICE Global frame tdot 厂 Show hidd ancel 8 Creating the port Click the Command tab and enter the following Properties: dipole 1-HfSSModel1-3D Modeler alue Coordirate Sye Position Orm, -dip._Iad. -gap_erc/2 Please note that the variable gap src was chosen relatively small in comparison to the dipole structure this was done to minimize effects due to the source and place emphasis upon the structure. The source is depicted below

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