Command Reference for Momentum

Momentum Menu

Layout Window
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Simulation Mode

Enable RF Mode / Disable RF Mode

Toggles Momentum's simulation mode setting between RF mode and microwave mode. In each case, the Layout window's Momentum menu label indicates the current mode.

Substrate Menu

Open...

Provides you with a choice to open a predefined, supplied substrate ( Yes ) or a project specific user defined substrate ( No ).

Save

Saves the substrate and defined metallization for the open design.

Save As...

Saves the substrate and defined metallization by a name of your choice.

Delete...

Deletes the substrates chosen.

Create/Modify...

Creates a substrate/metallization definition or modifies an existing one.

Update From Schematic

If the substrate used in a Momentum layout is defined in a schematic (for example, with the MSUB component) and the substrate on the schematic is modified, you must update the substrate information in the layout by choosing Momentum > Substrate > Update From Schematic .

Precompute...

• Substrate > Precompute - Computes the substrate function over a designated range.
• Mesh > Precompute - Specifies the frequency for which the mesh will be precomputed. The default value in the Global Mesh Setup Panel or the Precompute Substrate dialog box is used if no value is specified here. You can set the frequency to any value within the range of the substrate definition.

Summary...

Displays the summary of a Momentum process:

• Substrate > Summary - Displays a summary of the substrate processes which have occurred.
• Mesh > Summary - Provides a count of the cell types. A count of the resources used to compute the mesh is also provided. Every mesh computation completed is reported.
• Simulation > Summary - Provides a summary of simulation data. Details about mesh reduction and quasi-static calculations are included when using the RF mode.
• Optimization > Summary - Displays a copy of the Optimization window data.

Port Editor...

Defines the Momentum specific characteristics of the ports in the layout. The port editor cannot be activated until after the substrate dielectric layers and the circuit metallization have been defined.

Box-Waveguide Menu

Add Box...

A box can be added onto a substrate that is between an upper and a lower ground plane.

Delete Box

Click and the previously defined box will be deleted.

Add Waveguide...

A waveguide can be added onto a substrate that is between an upper and a lower ground plane. A waveguide can be defined parallel to either the X-axis or the Y-axis.

Delete Waveguide

Click and the previously defined waveguide will be deleted.

Component

Parameters...

Allows you to change a layout parameter to show how an incremental change in the parameter value affects your original layout.

Create/Update...

Specifies settings for creating or updating a layout component.

Model Database...

Displays models already available for a component. The parameter settings for every available model can be viewed and models can be deleted.

Mesh Menu

Setup...

Defines the parameters to be used in computing a mesh.

Precompute...

Specifies the frequency for which the mesh will be precomputed. The default value in the Global Mesh Setup Panel or the Precompute Substrate dialog box is used if no value is specified here. You can set the frequency to any value within the range of the substrate definition.

Summary...

Provides a count of the cell types. A count of the resources used to compute the mesh is also provided. Every mesh computation completed is reported.

Clear

Erases the mesh that is displayed on the structure after the mesh is computed.

Simulation Menu

S-parameters...

Defines the parameters and performs a simulation.

Summary...

Provides a summary of simulation data. Details about mesh reduction and quasi-static calculations are included when using the RF mode.

Optimization Menu

Parameters...

Specifies the layout parameters to be optimized. Opens any designs related to optimization. Displays the optimal values of specified parameters.

Goals...

Specifies the goals of the optimization.

Run...

Runs the optimization. Specifies the type of optimization method to be used.

Summary...

Displays a copy of the Optimization window data.

Post-Processing Menu

Radiation Pattern...

Defines the properties for calculating a radiation pattern and performs the calculations.

Visualization...

Opens the Momentum Visualization display tool for viewing simulation results in 3D.

3D EM Menu

Save Files for 3D EM

Writes Momentum data to 3D EM project files for import into 3D EM
modeling tools. The files are saved in the current project under <project_name>/ mom_dsn /<design_name>/ 3DEM , and contain the design geometry and the Momentum setup.