Dihedral Corner Region Camouflage in Radar Vision by Super-Dispersion Encoded Surfaces

The dihedral angular structure is a key source of strong dispersion in radar images and serves as a crucial basis for radar image recognition. Modifying the scattering characteristics of the dihedral angular structure is essential for achieving stealth recognition in jamming radar systems. In this paper, we design a wideband super-dispersion coded surface (SDES) and apply it to the angular surfaces of dihedral angular structures to adjust their local scattering characteristics, enabling regional stealth camouflage. Experimental results show that the SDES effectively disperses the cumulative spectral components of dihedral angular structures, thereby modulating the radar target's scattering properties in these regions. Given that dihedral angular structures are often associated with cylindrical structures in practical applications, we also investigate the scattering characteristics of dihedral angular structures incorporating cylinders to further refine the stealth strategy. This research introduces a novel method for the stealth and camouflage of jamming target imaging radar and has the potential to be extended to other frequency bands, enabling multi-band electromagnetic wave stealth and camouflage.