Generating and Steering Quasi-Non-Diffractive Beam by Integrated Coding-Metasurface-Based Reflectarray

A highly integrated coding-metasurface-based reflectarray antenna generating and steering the quasi-nondiffractive beam is proposed in this paper. The effect of the phase error introduced by the 1-bit phase correction is studied. An optimization method of the 1-bit discrete phase shift distribution is proposed to reduce the influence of phase shift error on nondiffractive beam. The numerical simulation and measurement results indicate that the 1-bit phase correction reflectarray using the proposed optimization method can effectively generate and steer the quasi-non-diffractive beams. The beam steering speed is up to 40,000 times per second.