Расчет электромагнитных полей в неоднородных средах для выбора защитных покрытий

Abstract

The aimof the work is to develop a method for high-frequency EMFs calculation in terms of the modified vector potential and to use it for choice of the parameters of the layered absorbing coatings that provide effective absorption of radio wave radiation. Methodology. A method for calculation of electromagnetic fields in inhomogeneous media is described. It is performed in terms of the modified magnetic potential at presented a plane electromagnetic wave as an incident and reflected one. To rеduce the computational domain size, additional uniaxially perfectly matched layers ensuring fast and nonreflective attenuation of electromagnetic field (EMF) strengths are used at its boundaries. It is supposed that electrical parameters of such layers have not only resistive, but alsomagnetic losses. Results. Modification of the known methods for dividing the wave into the incident and reflected, aswell as introducing uniaxially perfectly matched layers at the domain boundaries and formula-tion of the problem in terms ofthe modified vector potential, provide a possibility to solve the problem of the electromagnetic wave incidence onto heterogeneousmedia at reduced memory and counting time compared to the formulation tasks through the EMF strengths. Practical value. The described method was used to select parameters of radio-absorbing coatings, applica-tion of which on conductive bodies reduces the reflections from them of the incident electromagnetic waves. This provides a possibility to choose the electrical parameters of layered coat-ings with active losses, as well as magnetic losses, which pro-vide a decrease of the reflected waves amplitude by an order of magnitude or more. Originality. For the first time, the problem of calculating the incidence of an electromagnetic wave on an inhomogeneous medium with active electricaland magnetic losses was formulated in terms of the modified vector potential. The parameters of a multilayer lossy coating, which ensures decrease of the reflected EMF wave strengths by an order of magnitude or more are determined.