A Novel Dielectric Honeycomb Structure for Broadband Traveling Wave Scattering Suppression

Traveling wave scattering represents a classic instance of non-specular scattering. It transpires when the electric field component of the incident wave runs parallel to the metal surface, situated within the plane formed by the surface normal and the incident direction, thus inducing the propagation of the traveling wave. Upon encountering impedance discontinuities, such as edges or vertices, the traveling waves experience backscattering, leading to an increase in the target radar cross section (RCS). This paper presents an innovative approach, introducing a dielectric honeycomb structure designed for wave absorption. When applied to a metal plate, this structure achieves a noteworthy 10 dB reduction in RCS within the frequency range of 0.8 GHz-4.5GHz at a 70° TM incidence. Additionally, the absorbing honeycomb exhibits a high structural strength-to-mass ratio, rendering it more competitive in the realm of stealth materials application.