An approximate theory of propagation of a Gaussian-Hermitian bounded wave beam obliquely incident on an arbitrary plane-conserving electrodynamic structure was constructed using the Rayleigh formalism in the paraxial approximation. The transmission coefficient of the structure is represented as a rapidly converging quadratic Hermitian form comprising the relevant plane-wave factors and their spatial derivatives. The form obtained is convenient for both a numerical study of reflection, absorption, and propagation of bounded wave beams in various media and for analytic calculations and estimations.
Department of Radiophysics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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