===Modeling Planar Structures of Infinite Extents===
[[Image:FDTD23.png|thumb|Domain Settings dialog]]
You may occasionally want to use EM.Cube's FDTD simulator to model planar structures. Although EM.Cube provides the more computationally efficient [[Planar Module]] for this very purpose, there are many cases when an FDTD simulation might prove advantageous over a 2.5-D MoM simulation. Examples include examining the transient response of a planar structure, very wideband simulations, planar structures involving complex materials or 3D geometries embedded inside the substrate layers, to name a few.
<font color="#a52a2a"><u>'''The current release of EM.Cube's [[FDTD Module]] does not support anisotropic or dispersive layers of laterally infinite extents. In other words, You can only define anisotropic and dispersive material objects of finite size that do not touch the CPML boundaries.'''</u></font><br />
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[[Image:FDTD23.png]]
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[[Image:FDTD24.png]]
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Figure 1: Setting the ±X and ±Y and -Z domain offsets equal to zero for a laterally infinite planar structure with a PEC ground.