Antiradar Protection of a Metal Body with a Dielectric Coating

摘要

A metal body can be made invisible for a radar (radar-protected) through covering it with a dielectric film. The invisibility means that the scattered (diffraction) field induced when a plane wave radiated by a radar is incident on a body has a zero amplitude in the direction toward the radar and that this situation occurs for any direction of the arrival of an arbitrarily polarized incident wave. The permittivity of the film should be anisotropic, complex, and different on different sections of a body's surface. A system of equations from which this permittivity can be found is derived. The problem of protection of a cylinder of an arbitrary section is considered in detail.