Modal analysis of planar structures loaded with wire-medium slabs using a transmission-line approach

A transmission-line approach is presented for the analysis of planar structures including homogenized wiremedium slabs with vertically aligned wires. The network formalism allows for an effective determination of the modal dispersion equation via transverse resonance, as opposed to the more cumbersome field-matching approach. A parallel-plate waveguide loaded with wire medium to suppress TEM-mode propagation is considered as a case study. Numerical results, benchmarked also against state-of-the-art simulation software, confirm the accuracy and effectiveness of the proposed formulation.