[[EM.Tempo]] allows you to simulate doubly periodic structures with periodicities along the X and Y directions. In the FDTD method, this is accomplished by applying periodic boundary conditions (PBC) at the side walls of the computational domain.
{{Note| [[EM.Tempo]] can only handle regular, non-skewed periodic lattices only with no secondary offsets.}}
[[Image:Info_icon.png|40px]] Click here to learn more about the theory of '''[[Basic_FDTD_Theory#Time_Domain_Simulation_of_Periodic_Structures | Time Domain Simulation of Periodic Structures]]'''.