Large-angle Beam-scanning Phased Array Designs Based on the Metasurface

Based on the metasurface, a large-angle beam-scanning phased array design is introduced in this paper. Due to the mutual coupling changes significantly with the increase of the scanning angle, the scanning coverage is generally limited. The metasurface design is an effective method to overcome this problem. Generally, the metasurface is designed as an impedance matching layer and placed in parallel at some distance above the array. Here, a metasurface composed of periodically arranged subwavelength cross-shaped metals is designed. The designed metasurface is used as the decoupling wall to broaden the scanning coverage.