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Transmitarray unit cell

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Hi guys

 I am designing a unit cell of a transmitarray antenna in a periodic structure condition. The unit cell consist of a perfect conductor plate on a thin dielectric substrate. If I want to choose the dielectric to be a foam with a unity relative permittivity (similar to free space) and assuming that it is a lossless foam. In this case , do I need to mesh the dielectric substrate either surface mesh of tetrahedral  ? or no need because the dielectric behaves like free space. 

thanks 

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Hi designer

 

You can omit the dielectric and just mesh the plate.

 

But in general, adding a single dielectric layer to a periodic boundary condition solution would not add much runtime or memory.

If you want to add the dielectric, use the surface meshing method. It will be the default method, unless you change e.g. to finite element method.

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