Generation and Modulation of a Two-Dimensional Airy Beam Based on a Holographic Tensor Metasurface

Abstract

The Airy beam has the characteristics of nondiffraction, self-bending, and self-healing, so it is of great significance to wireless power transfer (WPT) and wireless communication in the radio-frequency (rf) field. This paper proposes the generation and modulation method of the two-dimensional (2D) Airy beams based on a holographic tensor metasurface, which can generate 2D Airy beams with different trajectories. A multidimensional controllable tensor metasurface unit operating at 10 GHz is designed to concentrate the electromagnetic energy to achieve the linearly polarized Airy beam. The unit with tiny size can also precisely regulate both the amplitude and the phase of the electromagnetic wave so that the high-performance 2D Airy beams can be generated by the holographic tensor metasurface in the microwave band. Meanwhile, the Airy beams with varying deflected angles are designed based on beam-steering theory to obtain different energy transmission trajectories for WPT. The simulation and measurement results show that the deflected 2D Airy beam still maintains the characteristics of nondiffraction and self-bending.