Design of QR-Coded Metasurfaces for RCS Reduction at mmWave

This article presents the design of 1-bit metasurfaces for radar cross section (RCS) reduction over wide frequency band from 60 GHz to 120 GHz. The proposed can be designed without need any complicated optimization algorithms such as genetic (GA) or particle swarm (PSO), time-consuming simulations achieve optimized phase distribution map. maps required more than 10-dB RCS were generated using two-dimensional (2D) quick response (QR) generator in MATLAB which are fast and efficient. After we carefully studied several with various 2D QR codes, it was found that coded very powerful achieving low-level diffusive scattering patterns. Two their unit cells distributions being exactly same codes words “IEEE” “Metasurface” characteristics investigated. For off-normal oblique incidence, is preserved up incident angles 60° entire band. simulation measured results show reduce backscattered energies by different polarizations range yielding a fractional bandwidth 66.7%. approach makes realization coding metasurface much easier.