Wavelength Domain

) study and study step are used to compute the response of a linear or linearized model subjected to electromagnetic harmonic excitation for one or several wavelengths.

For example, in electromagnetic wave propagation, it is used to compute a structure’s transmission and reflection versus wavelength. A Wavelength Domain study accounts for the effects of all eigenmodes that are properly resolved by the mesh and how they couple with the applied excitations. The output of a Wavelength Domain study step is typically displayed as a transfer function (for example, magnitude or phase of scattering parameters versus wavelength).

The Wavelength Domain study step also provides a frequency, defined as

where f is the frequency, c0 is the speed of light in vacuum, and λ is the vacuum wavelength. This frequency can be used as an input parameter to physics interfaces formulated to be run by Frequency Domain studies.

It is also possible to add an auxiliary sweep to this study step, which creates a multiparameter sweep (Parametric solver) over both the wavelength and the given parameters, and optionally with continuation in the wavelength or in one of the given parameters. It corresponds to a stationary parametric solver that is preset to linearize the equations (Stationary Solver with a Parametric attribute).

Alternatively, select the check box to use an AWE Solver instead of the Parametric solver.

	The Include geometric nonlinearity check box, Results While Solving, Mesh Selection, Adaptation and Error Estimates, and Auxiliary Sweep are described in Common Study Step Settings. There is also detailed information in the Physics and Variables Selection and Values of Dependent Variables sections.

This study and study step require the Wave Optics Module.

Specify the vacuum wavelengths to use for the wavelength sweep. Select the unit to use from the list (default: μm). Type the vacuum wavelength in the field using space-separated numbers or the range function.

Use the field to select a file with parameter values. You can browse your file system for files by clicking the button. After selecting a file, click the button to load the parameter values into the field.

For information about the list, see Reuse Solution from Previous Step List.

Also see Auxiliary Sweep.

Select the check box to enable the asymptotic waveform evaluation (AWE) solver. The Frequency Domain study generates a solver configuration that is used to solve a stationary parametric problem or an asymptotic waveform evaluation problem. By selecting this check box, this study step corresponds to an AWE Solver.

If you are running a parametric sweep and want to distribute it by sending one parameter value to each compute node, select the check box. This requires that your study includes a parametric sweep. To enable this option, click the button (

) and select .