CST2013: Settings for Floquet Boundary

Simulation: Settings Boundaries Floquet Boundaries

This dialog box offers options to modify the parameters of Floquet modes. Only experienced users should change these settings.
Please note that this dialog is available after you have defined a boundary as type unit cell.

Properties frame

Edit Floquet port: Specify the Floquet port for which the following settings are valid.

Number of Floquet modes: Set the number of Floquet modes that will be considered for the simulation.

Distance to reference plane: Specifies the distance to your reference plane which is then used during the simulation to obtain the correct phase information for the S-parameters (phase deembedding). Positive values move the reference plane outwards, negative inwards. The deembedding for Floquet ports can only be set before the calculation.

Details>>

Enlarges the dialog box to show further details for the Floquet port.

Floquet modes frame

The list of Floquet modes can be fully customized or can be set up automatically. For the latter case, the maximum Floquet mode order along the two lattice vectors may be changed if required. Press the Update button to overwrite the list of Floquet modes based on the new settings.

After manually changing the TE/TM check boxes or the mode's order numbers, Floquet modes (customized) is displayed as the title of the Floquet modes frame to indicate that the list has been customized. Pressing the Update button again overwrites the list and thereafter the title will read Floquet modes again.

The fundamental Floquet modes TE(0,0) and TM(0,0) are linearly polarized plane waves. In order to consider Circular Polarization, check the corresponding box.

By clicking on the mode list's header, the sorting of the Floquet modes can be changed. For instance, click on Beta once to sort by decreasing beta, and again to sort by increasing beta. The default sorting is by decreasing beta, with the TE(0,0) and TM(0,0) fundamental modes as the first modes, regardless of their beta. If the list has not yet been customized, click on the Nr. column header to restore the default sorting order. The propagating constants are determined at the Sort evaluation point.

Sort evaluation point frame

The sorting of the Floquet modes needs to be independent of the current sample's frequency, theta, phi, and media factor. Change the values to evaluate the propagation constants and sort the modes for different parameters. The media factor is the square root of the relative permittivity times the square root of the relative permeability. If not specified, the media factor refers to the background material, which in many cases is vacuum, hence a media factor of One. If one Floquet port is within the background material and the other is not, you may want to overwrite the media factor for the second port to preview the modes' parameters in that port, considering its material filling.

OK

Accepts your settings and leaves the dialog box. You will return to the boundary dialog box.

Cancel

Closes this dialog box without performing any further action.

Help

Shows this help text.

See also

Boundary Conditions: Boundaries, Symmetry Planes, Phase Shift/Scan Angle, Unit Cell, Boundary Temperature