RL-GO

Parameters:

Use RL-GO on all surfaces with label

The label to which the RL-GO should be applied

(optionally) up to label

The label up to which the RL-GO should be applied. RL-GO will not be applied to labels outside of the range between this field and the label in the previous field.

Max no. of ray interactions

This parameter gives the maximum number of ray-interactions (that is reflection and transmission combined). If for example, the parameter is set to 3, a ray can have 3 reflections, or 2 reflections and a transmission. If left empty, then the maximum number of ray interactions is determined automatically.

Write ray data to

*.bof file (default)

This option exports the rays during the RL-GO solution process to the .bof file for visualisation in POSTFEKO.

*.ray file

This option exports the rays during the RL-GO solution process to a .ray file. This text file can be used for custom post-processing.

Note:

• Large .ray files are possible when the MoM and UTD solution have not been decoupled and the MoM part contains a large number of mesh elements.
• For parallel runs the run-time can also increase significantly when exporting ray data.

The following abbreviations are used in the .ray file and POSTFEKO.

Q

Source point

R

Reflection

S

Observation point

T

Transmission on a dielectric

Ray contributions (higher order)

Determines which ray contributions to take into account.

Edge and wedge diffractions

Diffraction on edges and wedges are taken into account.

Set face absorbing properties

This option enables the specification of the absorbing and reflection/transmission properties of the faces with regards to rays. For both sides of a face (normal side / opposite to normal side), the following options are supported:

• Consider transmission / reflection of rays from the face(s).
• No transmission / reflection of rays from the face(s).

Ray launching settings

Specify the settings for the launching of rays.

Adaptive ray launching

The ray launching parameters are determined automatically during the solution process.

Fixed grid increment

The Angular increment (theta / phi) and the Spatial increment (distance between the individual rays in the parallel ray front) for the ray launching are specified by the user.

Adaptive ray launching accuracy

Controls the density of the rays launched as well as when to stop tracing a ray based on the ray's decay. Choose between High (more rays), Normal (default) and Low (fewer rays).

Tip: Start with Low (fewer rays), which uses the least computational resources, and when the model appears to be performing roughly as expected, use a higher setting.

Uncoupled with moment method

This item specifies whether the coupling from the UTD region to the MoM region should be considered. This option should only be used when the UTD and MoM regions do not couple (interact) strongly.