how to set groundplane with thickness 1mm in ie3d

hello i m sameer
i want to ask that how can i set the thickness of ground plane in ie3d. the thickness in the paper is given as 1mm with dimensions but i m not able to set the thickness please somebody help me by step by step procedure.
thank you

In case of horizontally-finite groundplane, you can first define a metal type of 1-mm thickness, then assign the finite groundplane to this metal type. In case of infinite groundplane, there is no way to realize this in IE3D if the groundplane is highly conductive.