The Periodic Region object is used to define periodic or anti–periodic behavior in a particular model for Electromagnetic analyses (see Electromagnetic Periodic Symmetry section).

Electromagnetic Periodicity

A model exhibits angular periodicity when its geometry and sources occur in a periodic pattern around some point in the geometry, and the repeating portion that you are modeling represents all of the sources, as shown below (see the Periodicity Example).

Electromagnetic Anti-Periodicity

A model exhibits angular anti-periodicity when its geometry and sources occur in a periodic pattern around some point in the geometry and the repeating portion that you are modeling represents a subset of all of the sources, as shown below.