An analysis of the inhomogeneous wave interaction with plane interfaces

We present the analysis of the interaction of inhomogeneous plane waves with planar interfaces in different scenarios. We consider the leaky wave in a vacuum generated by a two-dimensional dissipative prism and we study it with a theoretical method presented in the literature. To validate our results, we compare them with the simulations obtained with a Finite Element Method (FEM) software. As a second example, we consider a leaky-wave antenna proposed in the literature, based on a stub-loaded rectangular waveguide. We simulate the antenna on the FEM software, validating the results with the measurements presented in the literature. Moreover, we consider the incidence of the leaky wave generated by the antenna on a dielectric-conductor interface and we compute the transmission angles of both the phase and attenuation vectors with the theoretical analysis and with the simulations, finding a very good agreement.