Millimeter-Wave High-Gain Ridge Gap Beam Steerable Antenna For 5g Wireless Networks

A novel high-gain beam steerable antenna is presented to rotate the radiation pattern continuously around the broadside axis at 60 GHz frequency band. A broadside nulled pattern patch antenna is designed with ridge gap waveguide (RGW). A phase gradient metasurface (PGM) is implemented on top of the antenna which by mechanically rotating the PGM surface around its center, the radiation pattern can be rotated continuously. The proposed PGM surface behaves like a soft surface, and consists of square-shaped unit cells placed on the host substrate with a relative permittivity of 3.