Broadband and Wide‐Angle Radar Cross‐Section Reduction of Dihedral Corner Reflectors Based on the Chessboard Metasurfaces

In this article, a chessboard metasurface is proposed to reduce the radar cross section (RCS) of the dihedral corner reflector (DCR). By loading a checkerboard metasurface on one side of the DCR, a broadband RCS reduction is achieved. The simulation results show that the proposed DCR has a significant RCS reduction of more than −10 dB in the frequency ranges of 6.5–13.53 GHz with fractional bandwidths of 70.2% under transverse electric (TE) polarization and in the frequency ranges of 6.2–13.6 GHz with fractional bandwidths of 74.75% under transverse magnetic (TM) polarization. Additionally, the RCS reduction properties of the proposed DCR at various azimuth angles are investigated, and the wide‐angle RCS reduction from 0° to 65° is realized. To obtain more wide‐angle RCS reduction, double‐sided checkerboard loading is performed on the DCR. The RCS reduction angle range increases from 65° to 90° for TE polarization and TM polarization. Namely, the RCS is reduced from 0° to 90° for TE polarization and TM polarization, as calculated by numerical simulations. The measured results are in great agreement with the simulation results. This method verifies the novelty and effectiveness of wide‐angle and wideband RCS reduction of DCR.