FDE Settings

This section describes the settings for FDE solvers.

Select the FDE button in the Home tab and click any empty space in the Composite viewer to create an FDE solver. Then modify the settings of the FDE solver in the automatically pop-up Edit properties interface to complete the addition of the FDE solver.

FDE Solver Settings

General Settings

The General tab is used to set the simulation space (including simulation and geometric dimensions) for the solver.

Simulation Dimension

The Dimension and polarization tab is used to set the simulation dimensions for the FDE solver. The user can select a 1D or 2D solver.

Name	Description
2D	2D X normal；2D Y normal；2D Z normal.
1D	Linear X：Y prop；Linear X：Z prop；Linear Y：X prop；Linear Y：Z prop；Linear Z：X prop；Linear Z：Y prop.

Geometry

The Geometry tab is used to set the geometric parameters for the FDE solver. The parameter types that can be set for the X, Y, and Z directions may vary depending on the solver space type selected.

Name	Description
Z/X/Y pos	Set the center of the solver.
Z/X/Y span	Set the scope of the solver.

FDE

When performing FDE mode solving, you can select different material sampling types based on specific material types.

Sampled Material Sampling Types

The following two material sampling types are available for Sampled materials:

Name	Description
Linear interpolation	When applying the Linear interpolation to acquire material data, the resulting material data may have discontinuities in frequency.
Fit model	Use a polynomial material model to fit Sampled material data.

Analytic Material Sampling Types

The following two material sampling types are available for Analytic materials:

Name	Description
Analytic model	Use model data for Analytic materials.
Fit model	Use a polynomial material model to fit Analytic material data.

When the Fit model is selected as the Material sampling type, the menu bar of Fit bandwidth is editable.

Show/Hide Advanced Settings

The Show/Hide advanced tab provides an advanced FDE setting that allows you to set whether to automatically remove PML modes.

Name	Description
Automatically remove PML modes	Checked by default.
Threshold for PML mode removal	The threshold required to remove PML modes.

Background Material

The Background material tab provides the Background material drop-down menu for user selection.

Name	Description
Background material	The background material library, including materials from the Global library. You can also use the Add/Edit in the Project library to create project-specific materials as background materials.

After selecting a background material, its relevant information (Name, Type, Last modified, etc.) is displayed simultaneously.

Mesh

The Mesh tab provides the mesh settings for solvers.

For more details on Mesh, see Mesh.

Boundary Conditions

The Boundary conditions tab provides the boundary condition settings for solvers.

For more details on Boundary conditions, see Boundary Conditions.

Impedance

The Impedance tab is used to calculate the result based on the effective characteristic impedance within the specified integration region. This tab is disabled by default.

Check to enable the Calculate characteristic impedance option.

Name	Description
Integration shape	Select the shape of the integration, including rectangular and circular structures.

Advanced Settings

The Advanced tab provides the advanced settings for solvers.

Name	Description
Force symmetric x/y/z mesh	Only the positive-axis half of the simulation region needs to be considered; the mesh of the negative-axis half replicates that of the positive-axis half. In general, this option is very practical for simulations with structural symmetry.