Workshop 5-1: Dynamic Link

Transcription

1 Workshop 5-1: Dynamic Link Release ANSYS HFSS for Antenna Design ANSYS, Inc.

2 Overview Linear Circuit Overview Dynamic Link Push Excitations Dynamic Link Example: Impedance Matching of Log-Periodic Antenna HFSS Simulation of Log-Periodic Antenna Circuit simulation containing dynamic link to HFSS simulation of Log-Periodic Antenna Unmatched circuit simulation and push excitations Creation of matching network using the Smith Tool Matched circuit simulation and push excitations ANSYS, Inc.

3 Example Antenna Matching Network Dynamic Link example of a matching network for a Log-Periodic Antenna This example is intended to show you how to: Dynamically link an HFSS project into a circuit simulation Push excitations from the circuit simulation to the HFSS project ANSYS, Inc.

4 HFSS Simulation ANSYS, Inc.

5 HFSS: Getting Started Launching ANSYS Electronics Desktop 2015 To access ANSYS Electronics Desktop, click the Microsoft Start button, Select Programs > ANSYS Electromagnetics > ANSYS Electromagnetics Suite Select ANSYS Electronics Desktop 2015 Setting Tool Options Note: In order to follow the steps outlined in this example, verify that the following tool options are set: Select the menu item Tools > Options > HFSS Options... Click the General tab Use Wizards for data input when creating new boundaries: Checked Duplicate boundaries/mesh operations with geometry: Checked Click the OK button Select the menu item Tools > Options > 3D Modeler Options. Click the Operation tab Select last command on object select: Checked Click the Display tab Set default transparency to 0.7 Click the Drawing tab Edit properties of new primitives: Checked Click the OK button ANSYS, Inc.

6 Open Project Opening the Project In the ANSYS Electronics Desktop select the menu item File > Open. Browse to the folder containing the file Log_Periodic_Antenna.aedt and select Open Get familiar with the model. Look over the geometric details, boundary conditions and excitations ANSYS, Inc.

7 Analyze Model Validation Select the menu item HFSS > Validation Check Click the Close button Note: To view any errors or warning messages, look at the Message Manager window. Analyze Select the menu item HFSS > Analyze All After analysis is complete save the project Select the menu item File > Save Validate Analyze All ANSYS, Inc.

8 Create S-Parameter vs. Frequency Plot Create Reports Select the menu item HFSS > Results > Create Terminal Solution Data Report> Rectangular Plot Solution: Setup1: Sweep Domain: Sweep Category: Terminal S Parameter Quantity: St(LP_T1,LP_T1) Function: db Click New Report button Click Close button ANSYS, Inc.

9 Create Z-Parameter vs. Frequency Plot Create Report Select the menu item HFSS > Results > Create Terminal Solution Data Report> Rectangular Plot Solution: Setup1: Sweep Domain: Sweep Category: Terminal Z Parameter Quantity: Zt(LP_T1,LP_T1) Function: re, im Hold Ctrl key to select multiple quantities Click New Report button Click Close button Note: Z(1,1) parameter of a single port device is its Input Imepedance. We will attempt to improve the match from a 50 ohm line to the antenna s input impedance of Zin(10 GHz) = j101 ohms Save the Project Select the menu item File > Save ANSYS, Inc.

10 Circuit Simulation ANSYS, Inc.

11 Inserting Circuit Design Insert Circuit Design Select the menu item Project > Insert Circuit Design For the Choose Technology option Click None Rename the Circuit Design Project In the Project Manager window: Right-click on the Circuit1 and select Rename Type Matching_Network and press Enter Save the Project Select the menu item File > Save ANSYS, Inc.

12 Adding HFSS Model Inserting HFSS Model into Circuit Design In the Project Manager window: Right-click on the HFSS design: LogPeriodicToothed_Antenna(DrivenTerminal) and select Copy Right-click on the Circuit design: Matching_Network and select Paste Or alternatively, drag and drop the HFSS Design into Circuit Design HFSS Model is inserted in the Schematic Editor HFSS design A subcircuit model of the HFSS design in inserted into Circuit design Note: Drag and Drop Or Copy and Paste operations work only if the HFSS Design is present in the same Project. To create dynamic link between the design in a different project, please go through the Appendix section at the end of the presentation ANSYS, Inc.

13 HFSS Subcircuit Model Exploring Properties of HFSS Subcircuit Model In the Project Manager window: Right-click on the HFSS design: LogPeriodicToothed_Antenna(DrivenTerminal) and select Copy Right-click on the Circuit design: Matching_Network and select Paste Or alternatively, drag and drop the HFSS Design into Circuit Design HFSS Model is inserted in the Schematic Editor HFSS design A subcircuit model of the HFSS design in inserted into Circuit design ANSYS, Inc.

14 Add Port Add Microwave Port Select the menu item Draw > Interface Port Place the port in the schematic editor and double-click it Toggle the Symbol from Interconnect to Microwave Port Click OK With Microwave Port selelected, select the menu item Draw > Flip Vertical Connect Elements Use your mouse to hover over the end of a pin and you will see that your mouse will change to an X Click once to start a connection Move your mouse to the pin of another element and click again to finish the connection Connect the elements. Interface Port Flip Vertical ANSYS, Inc.

15 Add Source Add Source Right-click on Excitations and select Configure Sources Click the Add to selected port button Specify AC magnitude ACMAG: 1V Click the OK button Click OK ANSYS, Inc.

16 Add Frequency Sweep Add Frequency Sweep Select the menu item Circuit > Add Nexxim Solution Setup > Linear Network Analysis Click on the Add button Select Linear Step Start: 8 GHz Stop: 11 GHz Step: 0.05 GHz Click the Add >>> button Click the OK button Click the OK button Analyze Select the menu item Circuit > Analyze ANSYS, Inc.

17 Create S-Parameter Report Create S-parameter plot Select the menu item Circuit > Results > Create Standard Report > Rectangular Plot Solution: LinearFrequency Domain: Sweep Category: S Parameter Quantity: S(Port1,Port1) Function: db Click New Report Click Close button Note: This result is identical to the S-parameter plot created in HFSS Design. In this case, we are exciting the HFSS design using a 50 ohm port, which is the same impedance as the port used in HFSS ANSYS, Inc.

18 Push Excitations Push Excitations To access the schematic editor, select the menu item Circuit > Schematic Editor Right-click on the component and select Push Excitations... Click OK ANSYS, Inc.

19 Create Radiation Pattern Switch to HFSS Design The Push Excitations process directly modifies the excitations found in the Edit Sources dialogue (HFSS > Fields > Edit Sources ) Any quantity that depends on the sources is therefore modified by the Push Excitations process Create Radiation Pattern Select the menu item HFSS > Results > Create Far Fields Report> Radiation Pattern Solution: Setup1: LastAdaptive Geometry: infsphere In the Trace tab Category: re Quantity: retotal Function: <none> Click the Families tab Click the edit button associated with Phi variable, Click the Select values radio button and select 90deg Close the pop-up window by clicking X button Click New Report button Click Close button ANSYS, Inc.

20 Matching Network Matching Circuit Design Double-click on circuit design Matching_Network in the Project Manager window Right-click and Select Copy Right-click on the Project Log_Periodic_Antenna and select Paste Analyze the New Circuit Double-click on new circuit design Matching_Network1 Select the menu item Circuit > Analyze Input Impedance of the Antenna Select the menu item Circuit > Results > Create Standard Report > Smith Chart Solution: LinearFrequency Domain: Sweep Category: S Parameter Quantity: S(Port1, Port1) Function: <none> Click the New Report button Click the Close button Select the menu item Report2D > Marker > Add Marker Place a marker at 10 GHz Note: the menu item report2d will not appear if there is no reports open ANSYS, Inc.

21 Smith Tool for Matching Network Smith Tool Select the menu item Report2D > Smith Tool Set the Frequency to 10GHz Right-click on the Smith Chart plot and select Data Marker Place a marker at 10GHz ANSYS, Inc.

22 Smith Tool Conjugate Marker Create a Conjugate marker point to the S11 trace at 10 GHz We will match the 50 ohm source to this marker point creating a conjugate match Click on the Conjugate button Click on the S11 trace at the 10GHz marker point Click here Conjugate Point ANSYS, Inc.

23 Smith Tool Matching Network Matching Network Select the Matching tab Click on the New Match button Click at the Center of the Smith Chart Click here ANSYS, Inc.

24 Smith Tool 1 st Matching Elements Add matching elements Click the button to add a Series Capacitor Click on the new matching point and drag it to the location shown below Drag to this location ANSYS, Inc.

25 Smith Tool 2 nd Matching Element Add matching elements Click the button to add a Shunt Inductor Click on the new matching point and drag it to the location of the conjugate marker Note: you can click on previous matching points and adjust their locations Drag to this location ANSYS, Inc.

26 Smith Tool Export Matching Network Export the Matching Network Click on the Export button A message will be displayed indicating that a SubCircuit has been inserted into the Project. Click OK button Close the Smith Tool ANSYS, Inc.

27 Smith Tool Export Matching Network Matching Network Double-click on the Circuit Design Matching_Network1 Notice the SubCircuit: Circuit1 in the Project tree Connect the Subcircuit block between the Port and Antenna Subcircuit block Analyze Select the menu item Circuit > Analyze ANSYS, Inc.

28 Viewing Results Double-click on the plots in the Results ANSYS, Inc.

29 Push Excitations Push Excitations In the Schematic view, right-click on the HFSS circuit symbol and select Push Excitations Click the OK button Radiation Pattern Double-click on the HFSS Design: LogPeriodicToothed_Antenna Open the previously created radiation pattern With the improved matching at 10 GHz, more energy is accepted by the port and stronger electric fields can radiated ANSYS, Inc.

30 Appendix: Dynamic Link ANSYS, Inc.

31 Circuit Design: Getting Started Launching ANSYS Electronics Desktop 2015 To access ANSYS Electronics Desktop, click the Microsoft Start button, Select Programs > ANSYS Electromagnetics > ANSYS Electromagnetics Suite Select ANSYS Electronics Desktop 2015 Insert New Project Select the menu item File > New Right-click on the Project1 and select Rename Type Dynamic_Link_HFSS and press Enter Insert Circuit Design Select the menu item Project > Insert Circuit Design For the Choose Technology option Click None Right-click on the Circuit1 and select Rename Type Matching_Network and press Enter Save the Project Select the menu item File > Save ANSYS, Inc.

32 Dynamic Link: HFSS Model Adding HFSS Model From the Component Libraries window: Select the Symbols tab To view the Component Libraries window, select the menu item: View > Component Libraries Click the Import Models button Select the HFSS icon: Import Components dialog opens, select the project: Log_Periodic_Antenna.aedt for Dynamic link and click Open ANSYS, Inc.

33 Dynamic Link: HFSS Model HFSS Dynamic Link The HFSS Dynamic Link dialog will be displayed: Click the OK button An instance of the component is attached to the cursor so you can drag and drop it into the schematic The Name and File fields display the HFSS design name and the file that is the source for the dynamic link Enter a Description if desired The Design field displays the name of the selected design. Use the pull-down to select a different design. The Solution field displays the name of the selected solution in the dynamic link project. Use the pull-down to select a different solution. Transmission line model specifies that the model specified in the pull-down menu will be used for transmission lines The Link Information panel at the bottom of the dialog shows the selected frequency points ANSYS, Inc.

34 Dynamic Link: HFSS Model HFSS Component Properties To view the parameters of the dynamic link, right-click on the component instance and select Edit Link Definition... The Properties dialog opens up For more information: ANSYS Online Help documentation on Add an HFSS N-Port Model ANSYS, Inc.