Wide-angle beam steering achieved by an array-fed phase reconfigurable metasurface

In this letter, we propose and experimentally demonstrate a space-fed beamforming approach capable of steering beams up to & PLUSMN;70 & DEG; with a focal ratio (F/D) reduced to 0.27 and a scan loss remained 4 dB. It is implemented based on an mmWave phase reconfigurable metasurface, and an unconventional array-fed architecture. By doing so, while the total profile of conventional space-fed phased arrays can be significantly reduced, specifications such as scan range and scan loss can be simultaneously improved. Compared with conventional phased array systems, such specifications are unique, and can be used to realize low-profile, cost-effective, space-fed phased arrays requiring ultrawide coverages at mmWave frequencies.