Investigation of Radar Cross-Section Reduction for Dihedral Corner Reflectors Based on Camouflage Grass

The investigation of how to control themicrowave scattering from strong scattering sources has vital applications in military and civilian areas. As a typical target, a right-angle dihedral corner reflector has been extensively investigated because of its strong electromagnetic scattering over a wide observation angle range. In this letter, a right-angle dihedral corner reflector with three loading conditions of the camouflage grass described in our previous investigation is discussed to investigate the radar cross-section (RCS) reduction effect for the typical target. For different RCS reduction effects of the camouflage grass loading conditions, which include paste, cover, and shield, the calculated results and the measurement results are presented and compared. The loading of camouflage grass greatly reduces the RCS of the corner reflector over a wide-angle range at 10 GHz and a broad band from 4 to 18 GHz. The paste loading condition of camouflage grass achieves the best RCS reduction effect. Then, the difference in the monostatic RCS curves is analyzed and explained by multiple scattering effects. The advantages of employing camouflage grass lie in its ability to clearly reduce the RCS of the dihedral corner reflector without having to shape the target structure or use absorbing materials. This approach can be broadly applied to composite scattering studies and the RCS reduction of targets.