LAB # 3 Wave Port Excitation Radiation Setup & Analysis

Transcription

1 COMSATS Institute of Information Technology Electrical Engineering Department (Islamabad Campus) LAB # 3 Wave Port Excitation Radiation Setup & Analysis Designed by Syed Muzahir Abbas

2 1 WAVE PORT 1. New Project Open a new HFSS project. In an Ansoft HFSS window, select the menu item File > New. Set Solution Type Select the menu item HFSS > Solution Type. In the Solution Type Window: o Choose Driven Terminal. Set Material Select the material as Copper. 2. Create the Wave port a) To create a circle that represents the port: Select the menu item Draw > Circle. Using the coordinate entry fields, enter the center position. X: 0.0 mm, Y: 0.0 mm, Z: 0.0 mm, Using the coordinate entry fields, enter the radius of the circle: dx: 0.31 mm, dy: 0.0 mm, dz: 0.0 mm, Note: The values are by default in mm. b) To set the name: Select the Attribute tab from the Properties window. For the Value of Name type: p1 Click the OK button. c) To select the object p1: Select the menu item Edit > Select > By Name. Select Object Dialog o Select the objects named: p1

3 2 3. Create Wave Port Excitation a) To assign wave port excitation. Select the menu item HFSS > Excitations > Assign > Wave Port. Wave Port: General o Name: p1 o Click the Next button. Note: The vector must be on the base and with in the base area. Wave Port: Terminals o Number of Terminals: 1 o For T1, click the Undefined column and select New Line. o Using the coordinate entry fields, enter the vector position. X: 0.31, Y: 0.0, Z: 0.0, o Using the coordinate entry fields, enter the vertex. dx: -0.21, dy: 0.0, dz: 0.0, o Click the Next button. Wave Port: Differential Pairs. o Click the Next button. Wave Port: Post Processing o Reference Impedance: 50 Click the Finish button. Task 1: Create a Rectangular Wave Port with Base at Z=5 and Area = 144 Sq inches. Instructor s Verification:

4 3 4. Set Default Material To set the default material: o Using the 3D Modeler Materials toolbar, choose vacuum. 5. Create Air a) To create Air. Select the menu item Draw > Box. Using the coordinate entry fields, enter the box position. X: - 5.0, Y: , Z: 0.0, Using the coordinate entry fields, enter the opposite corner of the base rectangle: dx: 10.0, dy: 20.0, dz: 12.0, b) To set the name: Select the Attribute tab from the Properties window. For the Value of Name type: Air Click the OK button. c) To fit the view: Select the menu item View > Fit All > Active View. 6. Create Radiation Boundary a) To create a face list. Select the menu item Edit > Select > By Name. Select Object Dialog, o Select the objects named: Air Select the menu item HFSS > Boundaries > Assign > Radiation. Radiation Boundary window o Name: Rad1 o Click the OK button 7. Create Infinite Ground Plane a) To create a face list Select the menu item Edit > Select > Faces. Graphically select the face of the Air object at Z=0. Z=. Select the menu item HFSS > Boundaries > Assign > Finite Conductivity.

5 4 Finite Conductivity Boundary window. o Name: gnd_plane. o Use Material: Checked. o Click the vacuum button. o Select Definition Window: Type copper in the Search by Name field. Click the OK button. Infinite Ground Plane: Checked. Click the OK button. 8. Create a Radiation Setup a) To define the radiation setup Select the menu item HFSS > Radiation > Insert Far Field Setup > Infinite Sphere Far Field Radiation Sphere Setup dialog. o Name: ff_2d o Phi: Start : 0 Stop: 90 Step Size: 90 o Theta: Start : -180 Stop: 180 Step Size: 2 Click the OK button.

6 5 Task 2: Create the Air with hemisphere. Also create the Radiation Boundary, Infinite Ground Plane and Radiation Setup. Instructor s Verification: A) Analysis Setup ANALYSIS 1. Creating an Analysis Setup a) To create an analysis setup: Select the menu item HFSS > Analysis Setup > Add Solution Setup. Solution Setup Window: o Click the General tab: Solution Frequency: 0.55 GHz. Maximum Number of Passes: 20 Maximum Delta S per Pass: Adding a Frequency Sweep a) To add a frequency sweep: Select the menu item HFSS > Analysis Setup > Add Sweep. o Select Solution Setup: Setup1 Edit Sweep Window: o Sweep Type: Fast. o Frequency Setup Type: Linear Count. Start: 0.35GHz Stop: 0.75GHz Count: 401 Save Fields: Checked. 3. Save Project a) To save the project: In an Ansoft HFSS window, select the menu item File > Save As. From the Save As window, type the Filename: rect_wave_port. Click the Save button.

7 6 B) Analyze 1. Model Validation a) To validate the model: Select the menu item HFSS > Validation Check. Click the Close button. Note: To view any errors or warning messages, use the Message Manager. 2. Analyze a) To start the solution process: Select the menu item HFSS > Analyze. 3. Solution Data a) To view the Solution Data: Select the menu item HFSS > Results > Solution Data. o To view the Profile: Click the Profile Tab. o To view the Convergence: Click the Convergence Tab. Note: The default view is for convergence is Table. Select the Plot radio button to view a graphical representations of the convergence data. o To view the Matrix Data: Click the Matrix Data Tab Note: To view a real-time update of the Matrix Data, set the Simulation to Setup1, Last Adaptive. Click the Close button.

8 7 Task 3: Analyze the model you have created in Task - 1 and Task - 2. Instructor s Verification: PLOT:

9 8 REPORTS A) Create Reports 1. Create Modal S-Parameter Plot - Magnitude a) To create a report: Select the menu item HFSS > Results > Create Report. Create Report Window: o Report Type: Terminal S Parameters. o Display Type: Rectangular Plot. Traces Window: o Solution: Setup1: Sweep1. o Domain: Sweep. o Click the Y tab. Category: Terminal S Parameter. Quantity: St(p1,p1), Function: db Click the Add Trace button. o Click the Done button.

10 9 Task 4: Create report (Modal S-Parameter Plot - Magnitude) of the model you have analyzed in Task - 3. Instructor s Verification: PLOT: B) Far Field Overlays 1. Create Far Field Overlay a) To create a 2D polar far field plot : Select the menu item HFSS > Results > Create Report. Create Report Window: o Report Type: Far Fields. o Display Type: Radition Pattern. Traces Window: o Solution: Setup1: LastAdaptive. o Geometry: ff_2d o In the Mag tab. Category: Gain. Quantity: GainTotal. Function: db Click the Add Trace button. o Click the Done button.

11 10 Task 5: Create report of the model you have analyzed in Task - 3. Instructor s Verification: PLOT: