Design of Passive Reconfigurable Coding Metasurface based on Ring Structure
Coding metasurfaces can regulate the spatial beam direction through coding sequences,which facilitates directional transmission and improves the communication quality for target users of wireless communication systems. In this paper,a three-layer structured cellular hypersurface with ring-shaped periodic metal patches operating at 3.5 GHz is designed. By changing the dimensions of the cell structure,the basic coding unit is obtained,and single-beam,dual-beam electromagnetic wave radiation is achieved by arranging the coding unit in different ways. With the beam regulation method of convolutional operation,the maximum value of the reflected beam angle under the vertical incident plane wave excitation is expanded from 30° to 51° under the traditional arrangement,and the minimum reflected beam angle reaches 5°,which provides a new idea for the continuous and flexible regulation of the electromagnetic beam on the metasurfaces.