• 首页
• HFSS教程
• ADS教程
• CST教程
• 射频工程师培训
• 微波仪器操作培训
• 天线设计培训
• 射频专业基础课

Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim Harmonic Balance >
   Running Harmonic Balance from the Schematic Editor       

Running Harmonic Balance from the Schematic Editor

From the Schematic Editor, perform the following steps to set up and run a harmonic balance analysis using Nexxim.

1. Right-click on the Analysis menu in the Project window to open a menu.

2. Select Add Nexxim Solution Setup from the menu, then slide the cursor to select Harmonic Balance (1-Tone) or Harmonic Balance (N-Tone) from the subordinate menu.

3. One-Tone Analysis. If you selected 1-Tone Analysis in step 2, the Harmonic Balance Analysis, 1-Tone dialog appears.

•  Type an Analysis Name (or accept the default name, for example “HB1Tone”).

•  For most simulations, leave the Disable box unselected (the default setting). Selecting this box lets you store multiple solution setups for later use. (Note that if a solution setup is disabled before the analysis is run, any changes made to the design will invalidate the simulation results.)

•  Specify the maximum harmonic number in the Max Harmonic Number field.

•  Specify the one-tone frequency in Hz in the F1 value field.

•  Optionally, select a Method (HB or Shooting; HB is the default). See Handling Strongly Nonlinear Circuits for details on the METHOD entry in the HB statement.

•  Optionally, set Transient Initial Time to a positive non-zero value representing time required for Transient to stabilize before HB begins using the result.

•  Optionally, set Auto Refine Solution to Yes (default is No). See Increasing Accuracy or Speed for details on the AUTO_REFINE_SOLUTION entry in the HB statement.

4. N-Tone Analysis. If you selected N-tone Analysis in step 2, the Harmonic Balance Analysis, N-Tone dialog appears.

•  Type an Analysis Name (or accept the default name, “HBnTone”).

•  For most simulations, leave the Disable box unselected (the default setting). Selecting this box lets you store multiple solution setups for later use. (Note that if a solution setup is disabled before the analysis is run, any changes made to the design will invalidate the simulation results.)

•  Click the Edit Tones/Maxk button. The Edit Tones/Maximum Harmonic Number dialog opens. Set the No. of tones; the dialog shows that number of tones. Click on the Value field for each tone to enter the desired frequency. Click on the MAXK field for each tone to enter the maximum harmonic number. Click OK to close the Edit Tones/Maximum Harmonic Number dialog and return to the Harmonic Balance Analysis, N-Tone dialog.

•  If you set the No. of tones to 1, the analysis becomes a single-tone analysis. With this setup, the Method field is enabled. Select HB or Shooting (HB is the default). See Handling Strongly Nonlinear Circuits for details on the METHOD entry in the HB statement.

•  Optionally, set Transient Initial Time to a positive non-zero value representing time required for Transient to stabilize before HB begins using the result.

•  Optionally, set Auto Refine Solution to Yes (default is No). See Increasing Accuracy or Speed for details on the AUTO_REFINE_SOLUTION entry in the HB statement.

•  When the number of tones is greater than one, the Trim Tolerance field is activated. See Increasing Accuracy or Speed for details on the TRIM_TOL entry in the HB statement.

5. To add a sweep, locate the Sweep Variable area in the Harmonic Balance Analysis dialog box.

•  In the Sweep Variable area, click Add, and the Add/Edit Sweep dialog box appears.

•  In the Variable list, select Temp or the name of a variable (when a variable has been defined for the design), and then select one of the following: Single value, Linear step, Linear count, Decade count, or Octave count.

•  Type the sweep values into the Value text box (for Single value), or into the Start, Stop, and Step text boxes (for Linear, Decade, or Octave count), and make sure that the appropriate units are selected for each.

•  For details on sweeps, see Variable Sweep.

•  Click Add, and then click OK to close the Add/Edit Sweep dialog box.

•  The Harmonic Balance Analysis dialog box reappears.

6. Click the Edit Quantities button to open the Defined Output dialog. In addition to the circuit nets and nodes, you can select the harmonics to include in the analysis:

•  Use the checkboxes on the Output dialog to select harmonics, and to add net voltages and branch currents to the data generated by the harmonic balance analysis. (If no harmonics are selected, harmonics DC, F1, 2F1, 3F1, and 4F1 will be automatically selected for output. In the Report dialog, only the selected harmonics are available for plotting.)

•  Click the OK button to add the selected output values and return to the Harmonic Balance Analysis dialog.

7. Optionally, use the fields in the Solution Option panel to select or add HB analysis options and other Nexxim options to the design.

•  Click the Select button on the Name field to open the Select Solution Options dialog.

If any options sets have been defined, their names appear in the Select Solution Options list. To select a named option set that you have previously defined, click the name of the option set, then click OK to return to the HB Analysis dialog. The named option set appears in the Name field in the Solution Options panel. See Analysis-Specific Options for details on creating option sets outside of the Solution Setup dialog.

To create a new option set, click New. The Solution Options dialog box appears. Use the Name field to name the new option set. Select the HB Options tab. Make the appropriate changes to option values, then click OK to return to the Select Solutions dialog box. On the Select Solutions dialog, click the name of the new option settings, then click OK to return to the HB Analysis dialog. The name of the new option settings appears in the Name field in the Solution Options panel.

•  Click the Edit button on the Additional field to open a text-entry dialog, Edit additional options.

Use the text box to enter any Nexxim options exactly as they are to appear in the netlist. Do not include the keyword .OPTIONS; the .OPTIONS keyword is automatically inserted at the beginning of the line in the netlist statement.

The line can contain multiple options settings. Use spaces to separate the options settings.

To modify or delete an option once it has been added, just edit or delete its entry in the list.

To clear all options, delete the entire line.

Click OK to return to the Harmonic Balance Analysis dialog.

The options in the Additional field are automatically added to the netlist when the solution containing them is performed.

•  For more information, see Harmonic Balance Options.

8. Run the simulation:

•  On the Circuit menu, click Analyze. If the circuit is set up correctly, the analysis begins immediately and a red progress bar appears.

•  The Message Window signals success or failure.

                HFSS视频教程                                      ADS视频教程                               CST视频教程                           Ansoft Designer 中文教程

      Copyright © 2006 - 2013   微波EDA网, All Rights Reserved    业务联系：mweda@163.com