Changes

Your physical structure in EM.Libera can be excited by an incident plane wave. In particular, you need a plane wave source to compute the radar cross section of a target. The direction of incidence is defined by the θ and φ angles of the unit propagation vector in the spherical coordinate system. The default values of the incidence angles are θ = 180° and φ = 0° corresponding to a normally incident plane wave propagating along the -Z direction with a +X-polarized E-vector. [[EM.IlluminaLibera]] provides the following polarization options: TMz, TEz, Custom Linear, LCPz and RCPz.