Green's Function of Metasurface-Assisted Cavities

An efficient and fast approach is presented for closed-form evaluation of the spatial domain Green's function for a 2D rectangular room. The room comprises a metasurface and dielectric walls. The characteristic Green's function (CGF) technique, separability assumption and generalized sheet transition condition are used to find a closed-form relation for magnetic vector potential Green's function of vertical electric dipole (normal to metasurface wall). The advantage of the proposed CGF-CI method lies in its speed due to independence from source and field point locations as well as its accuracy.