Generalized Sheet Transition Conditions (GSTCs) for a Metascreen
Christopher L. Holloway
Using the multiple-scales homogenization method, we derive generalized sheet transition conditions (GSTCs) for electromagnetic fields at the surface of a metascreen---a metasurface with a ``fishnet'' structure. These surfaces are characterized by periodically spaced apertures in an otherwise relatively impenetrable surface. The apertures that compose the metascreen are of arbitrary shape and are embedded between two different magneto-dielectric media. The parameters in these GSTCs are interpreted as effective surface susceptibilities and surface porosities, which themselves are related to the geometry of the apertures that constitute the metascreen. Finally, we compare and contrast the important, but subdual, difference in the GSTCs required for metascreens to those required for a metafilms (where metafilms have a ``cermet'' structure, which refers to an array of isolated (non-touching) scatterers).
Generalized Sheet Transition Conditions (GSTCs) for a Metascreen, IEEE Transactions on Antennas and Propagation, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924091
(Accessed December 9, 2023)