▎ 摘　　要

NOVELTY - The utility model claims a graphene-based broadband terahertz surface plasma of microwave absorbing device, a microwave absorbing device belongs to technical field of terahertz, using the graphene surface plasma characteristics. the microwave absorbing device is a three-dimensional periodic structure, which structure is composed of metal of the metal substrate (1), silicon dioxide medium layer (2), and cross the graphene layer (3). The utility model mainly through finite element method to calculate the simulation out of graphene to the absorption spectrum of the terahertz wave, the wave absorbing device structure is optimized so as to reach ideal broadband microwave absorbing effect. The utility model structure is simple, it is easy to process; it can only realize absorbing efficiency is more than 90%, the bandwidth is 2.2 THz of microwave absorbing device by superposing two layers of crossed graphene material.