Modeling of Scattering of Electromagnetic Waves on the Base of Multialternative Optimization

Abstract

One of the problems arising in management of large systems, is a scattering of electromagnetic waves on complex structures with radio absorbing coatings. In many cases the hollow metallic structures with circular cross section are observed. The modal method was used to estimate the modes in the inner area of the cavity. Tangential components of electric and magnetic fields at the aperture of the cavity excited by a plane electromagnetic wave can be represented in the form of expansions in modes of waveguide with the corresponding unknown modal coefficients. At this stage, the reciprocity theorem of modal coefficients within the relevant cavity modes is determined. Methods of optimization of characteristics of radar absorbing coating are introduced. Determination of the real part of dielectric permeability of radar absorbing coatings in a given thickness of its layer is shown on corresponding figure. Application of absorbing load in the form of the two radar absorbing layers with increasing thickness of one absorbing coating with constant thicknesses of a different radar absorbing coating is introduced. The possibility of achievement of a significant reduction in the level of radar cross section is described.