Before you can run an FDTD simulation, you have to define a source to excite your projectâs physical structure. EM.Tempo offers a variety of excitation mechanisms for your physical structure depending on your particular type of modeling problem or application:
# '''[[FDTD_Source_Types#Ideal_Source|Ideal Source]]''': A stand-alone localized voltage source with an internal resistance.
# '''[[FDTD_Source_Types#Lumped_Source|Lumped Source]]''': An ideal source that must be place on a wire (a PEC line object).
# '''[[FDTD_Source_Types#Distributed_Source|Distributed Source]]''': A source with a prescribed impressed field component that is defined on a rectangular region of space parallel to a principal plane.