In order to use FDTD a computational ___domain must be established. The computational ___domain is simply the physical region verover which the simulation will be performed. The E and H fields will be determined at every point within the computational ___domain. The material of each cell within the computational ___domain must be specified. Typically, the material will be either free-space (air), [[metal]], or [[dielectric]]. Any material can be used as long as the [[permeability]], [[permittivity]], and [[conductivity]] are specified.
Once the computational ___domain and the grid material is established, a source is specified. The source can be an impinging plane wave, a current on a wire, or an applied electric field, depending on the application.
