Electromagnetic waves scattering from infinite periodic arrays of thin absorbing wires

Resonance absorption of the electromagnetic waves reflected from the infinite perfectly conducting screen covered with different layered structures of thin absorbing wires is studied. In the first case a structure represents a set of planar infinite 1D arrays of parallel infinitely long absorbing thin wires. In the second case a single mesh consists of the infinite 2D array of finite in length absorbing thin wires. For both problems the quasi-periodic electromagnetic wave field involves the incident and the specular reflected from the screen two plane waves as well as the diffracted field which is constructed as a superposition of the interacting wave fields irradiated by the induced electric currents of thin wires. The approach that allows us to calculate the diffracted field is based on the method of the integral equations of the Pocklington type suitable in the case of the thin wire approximation. The key point in this study is the analysis of the frequency spectrum of the reflected energy flux. A few cases of resonance absorption of the wave reflected from the screen covered with the layered structures are demonstrated numerically. The described layered structures represent the simplest construction in the sense of technology of manufacturing radio-absorbing surfaces that could be used in radio-location to reduce the monostatic radar cross section of various metallic objects of large size.