A Low-Profile Programmable Metasurface Excited by Fabry-Perot Cavity for Beam Steering

A low-profile programmable metasurface based on Fabry-Perot cavity with 1-bit coding is proposed working at the frequency of 5 GHz, which has the compact nature and the ability of beam steering. The basic principle and overall structure of the programmable metasurface are presented. The simulated amplitudes and phases of meta-atoms and scattering patterns are investigated. Due to its compactness, this metasurface is promising in applications like radar-cross-section reduction, radar, imaging, and wireless communications.