# '''[[FDTD_Source_Types#Plane_Wave_Source|Plane Wave Source]]''': A distributed source with a plane wave profile defined using a virtual box object enclosing the entire physical structure.
# '''[[FDTD_Source_Types#Gaussian_Beam_Source|Gaussian Beam Source]]''': A distributed source with a complex-valued focused Gaussian beam profile defined using a virtual box object enclosing the entire physical structure.
# '''Huygens Source''': A distributed source defined based on know tangential electric and magnetic field components on the surface of a virtual box object.
[[Image:FDTD48.png|thumb|300px|The Port Definition dialog]]