UTD Settings

A number of optional settings are available when using the uniform theory of diffraction (UTD) to solve a face or faces.

On the Solve/Run tab, in the Solution settings group, click the  Solver settings icon. On the Solver settings dialog, click the High frequency tab.

Decouple from MoM solutions

This option ignores the UTD regions when calculating the MoM currents.

Tip:

• Where the MoM and UTD regions are electrically far apart and far field quantities are of interest, decouple the solution to reduce the memory and run time without sacrificing the accuracy of the results.
• MoM and faceted UTD are not supported in the same model.

Maximum number of ray interactions

This option limits the number of ray interactions (reflection and diffraction combined). For example, if this parameter is set to 3, a ray can have three reflections, or two reflections and a diffraction. A value of 0 means that only direct rays are taken into account.

Note: For faceted UTD, this setting only affects the reflected rays.

Export ray file for post processing

This option exports the rays during the UTD solution process to a .ray file. The ray-tracing information is also stored in the .bof and you can view the rays in POSTFEKO.

Note: Large .ray files are possible when the MoM and UTD solution have not been decoupled and the MoM region contains a large number of mesh elements.