Yes, but what layout in X,Y??? is it Layout of a Dielectric layer?
Actually it is conductor layer which is finite (layout) in x, y & Dielectric Layer is infinite...!!! & in Z the dielectic layer height is finite ... and finally infinite groud plane???
You can't do finite dimension substrate analysis in Momentum...
But having said that it has a Box mode with approximation for such types of analysis...which is OK...
after defining finite substrate in box how can i define a metal under the sbstrate bigger than that beacuse ads gives error that your metal strip cannot be outside the box . following is the case i want to simulate
..........singnal
..........fininte ferrite substrate
..........metal block bigger than substrate size