All-metal metamaterial lens based on near-field convergence function and phasor shift design method thereof

The invention discloses an all-metal metamaterial lens based on a near-field convergence function and a phase shift design method thereof. The all-metal metamaterial lens is composed of a plurality of array units, and the array units with different phase shifters are arranged on an XOY plane according to a pre-designed phase shift distribution rule. Each unit comprises four metal layers 1 and three air layers 2, the four metal layers 1 and the three air layers 2 are arranged at intervals; each metal layer 1 comprises a square spiral gap; and the metal layer 1 of each unit is formed by rotating one square spiral gap by 0 degree, 90 degrees, 180 degrees and 270 degrees to obtain a center rotational symmetry structure. With the all-metal metamaterial lens based on the near-field convergence function and the phasor shift design method thereof of the invention adopted, the problems of high temperature resistance and mechanical stability of the all-metal metamaterial lens are solved. 本发明公开一种基于近场汇聚功能的全金属超材料透镜及其移相量设计