Synthesis of 1-bit Digital Anisotropic Impedance Cylindrical Metasurface for Monostatic RCS Reduction

摘要

2D-problems of scattering of plane E- and H-waves on a cylindrical metasurface (MS) with a smooth convex contour of the normal section and an impedance tensor from the class of deviators are considered in the paper. Systems of integral equations of currents on a surface of a homogeneous (not coded) and azimuthally coded 1-bit cylindrical digital anisotropic MS (CDAMS) are obtained and analyzed. In the high-frequency approximation, the problem of synthesis of the impedances of 1-bit CDAMS with bistatic scattering diagrams of radar cross section (RCS) on co-polarizations as in a similar black body (of Macdonald) is analytically solved. This provides zero monostatic RCS diagrams on co-polarizations, regardless of the shape of the cylindrical MS contour. The possibilities of reduction the bistatic and monostatic RCS of a metal cylindrical surface with a thin-layer dielectric coating and 1-bit MS on the base of anisotropic lattice of conductors in the form of a "figure-eight" are demonstrated. Efficiency of RCS reduction of different CDAMS models is compared.