Reflection, Transmission, and Absorption Coefficients Calculated for the Oblique Incidence of an Electromagnetic Wave on a Plate

摘要

The averaging and direct methods are applied to calculate the characteristics of propagation of an electromagnetic wave through a parallel-sided plate with an arbitrary conductance in the case when the wave is obliquely incident on the plate's plane. On the basis of averaged electrodynamic boundary conditions, simplified expressions for the reflection, transmission, and absorption coefficients are derived for the arbitrary conductance of the plate. It is shown that the averaging method facilitates calculations and yields simplified expressions owing to reduction of the order of the system of equations to be solved and to elimination of exponents and trigonometric functions. The error of the averaging method relative to the error of the direct method is several percent for the incidence angle ranging from 0° to 90° and for a plate as thick as 0.35 of the wavelength in the medium.