▎ 摘　　要

NOVELTY - The broadband tunable absorber comprises multiple structural units. The unit structure includes a metal substrate (1), a dielectric isolation layer (2) and a graphene layer (3). The upper end of the metal substrate is provided with the dielectric isolation layer. The upper end of the dielectric isolation layer is provided with the graphene layer. The graphene layer is provided with a square groove (31). The square groove extends to the medium isolation layer. The square groove is provided with a square graphene sheet (32). Multiple unit structures are periodically arranged. The top points of the four sides of the square groove are connected with the middle points. USE - Broadband tunable absorber based on graphene. ADVANTAGE - The simple structure, high absorption rate and simple control principle are provided by the broadband adjustable wave absorbing body. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the broadband tunable absorber. Metal substrate (1) Dielectric isolation layer (2) Graphene layer (3) Square groove (31) Square graphene sheet (32)