Multi-Modal Scattering and Propagation Through Several Close Periodic Grids

The presented method describes reflection and transmission of electromagnetic waves at multiple closely stacked metal grids using multimodal S-parameter propagation. For that, the periodic surface admittance curve every layer was determined through a novel semianalytic approach that uses simple Fourier transformations instead solving an integral equation. modal components this were used to express generalized scattering matrices individual grids. By applying propagation techniques resulting parameters, it possible model interactions within multilayer stack impedance sheets. Resulting parameters perfectly matched corresponding full-wave simulations even above grating lobe regime. In end, universal mode enabled modeling stack, connected lumped components.