The Periodic Port node is a default subnode to the Periodic Structure node. These nodes are added automatically when the Periodic Structure node is added.

The Diffraction Order and Orthogonal Polarization subnodes are available from the context menu (right-click the parent node) or from the Physics toolbar, Attributes menu. However, it is simpler to add these subnodes by clicking the Add diffraction Orders button in the parent Periodic Structure Settings.

This selection is locked to All boundaries and filtered to include all boundaries in the plane defined by the parent Periodic Structure Excited Port Selection.

Enter a unique Port name. Only nonnegative integer numbers can be used as Port name, as it is used to define the elements of the S-parameter matrix, reflectance and transmittance variable names, and numeric port names are also required for port sweeps and Touchstone file export.

The remaining settings are only displayed here. The editable settings are found in the Settings for the parent Periodic Structure node.