Define an infinite PEC plate by using periodic boundary condition

I want to define an infinite PEC plate by using periodic boundary condition in FEKO. When I ran the attached model I always get the following error message.

ERROR 32730: A solution is not possible for this combination of frequency, periodic spacing and phase shift. Please change one of these quantities slightly.

Can you have a look at the model and let me know how to model an infinite plate in feko?

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shan25_22144

Simulation ran when I selected phase shift option in periodic boundary condition setting as specify manually and set the phase shift in u1 and u2 directions to be zero.

image.png.f163bb61d71a46c0b34cbbacad915f6c.png

In post feko I compared the efield obtained by plate- PBC vs plate UTD simulation. In UTD simulation I asked the solver to include only reflection which in turn means the plate is infinitely extended. The near field results looks acceptable only for certain observation points

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I have attached both feko models. As a next step I want to define an infinitely extended anisotropic slab by using periodic boundary condition.

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shan25_22144

I simulated the model in FEKO 2019.3 and got the same plot as shown in my previous comment. I feel the periodic boundary condition in FEKO is not very reliable.

Mel

If the PBC boundary and plate is reduced to a size of width=length=lam/2 then the results agree.

It seems, at least for now, that the same error ERROR 32730 should have been given when you changed to the manual setting for the phase shift.

This is logged for further investigation.

Mel

This error has been fixed in Feko version 2019.3.2 which is downloadable now.