=== Plane Wave Sources ===
[[File:po_phys15.png|thumb|300px|plane wave dialog]]
The wire-frame structure in the [[MoM3D Module]] can be excited by an incident plane wave. In particular, a plane wave source can be used to compute the radar cross section of a metallic target. A plane wave is defined by its propagation vector indicating the direction of incidence and its polarization. EM.CUBE's [[MoM3D Module]] provides the following polarization options:
{{Note|In the spherical coordinate system, normal plane wave incidence from the top of the domain downward corresponds to θ of 180°. }}
[[File:po_phys15.png]] [[File:po_phys16_tn.png]]
The plane wave dialog and illuminating Figure: Illuminating a metallic sphere with an obliquely incident plane wave source.
== Running Wire MoM Simulations ==