Design of Tapered Periodic Meta-Surfaces for Suppressing Edge Electromagnetic Scattering

Abstract

In this paper, a novel approach for designing tapered periodic meta-surfaces (TPMS) is proposed for suppressing electromagnetic scattering from a trailing edge of a square metallic plate with a given thickness. The TPMS is realized by periodic square metallic patches with tapered dimensions at the direction perpendicular to the considered edge but keeping its period unchanged. Based on the geometric phase interaction, the mechanism of suppressing electromagnetic scattering is analyzed. The lossy material is not required in this design, so it doesn’t generate thermal energy and benefits infrared stealth of military objects. The backscattering properties from the trailing edge with the proposed TPMS loading are analyzed and compared with that of original trailing edge. It is observed that wide angular trailing edge scattering suppressing can be obtained and the average value of mono-static radar cross section (RCS) reduction is 10 dB for L-band, S-band and C-band. Finally, the bi-static RCS properties and energy distribution of the proposed structure are also proposed to explain the mechanism of the electromagnetic scattering suppression of the trailing edge employed with the TPMS.

A Low RCS Design under a Large Incident Angle for the Curved Surface Edge Considering Edge Effects

“…Edge scattering is an important phenomenon that can be explained as the scattering caused by the discontinuity impedance between the edge of the target object and its surrounding environment. So it is also useful to have gradient impedance loaded on edge [16][17][18][19]. Additionally, other related research includes the use of inhomogeneous anisotropic impedance surface to guide surface waves and suppress scattering from the oblique sides of triangular scatterers [20], as well as the utilization of soft and hard anisotropic impedance surfaces for redirecting backscattering [21,22].…”

The method of moments for electromagnetic scattering analysis accelerated by the polynomial chaos expansion in infinite domains

“…In recent decades, the research of electromagnetic scattering is playing a crucial role in the stealth system of military structures [1,2], exploration of underground resources and stratum structures, target recognition, antenna radiation, electromagnetic compatibility, etc. Higher target detection ability and lower detection risk are currently considered important indicators for its design [3], manufacture, and inspection.…”