Broadband wave-absorbing material with multi-layer structure

Abstract

The invention provides a broadband wave-absorbing material with a multilayer structure, and the broadband wave-absorbing material with the multilayer structure is formed by depositing a conductive carbon-based material or a carbon-based magnetic composite material on the surface of an insulating substrate material to form wave-absorbing sheets, and then stacking the prepared wave-absorbing sheets to construct the broadband wave-absorbing material with the multilayer structure. The broadband wave-absorbing material with the multilayer structure prepared by the invention has excellent broadband wave-absorbing performance, and can effectively absorb microwaves in S, C, X and Ku frequency bands (2-18GHz) (RL is less than-10dB) at the same time. According to the invention, the problem that the impedance matching of the wave-absorbing material is poor due to the fact that electromagnetic waves cannot enter the material due to good conductivity of a carbon-based material is solved, the problems that the existing wave-absorbing material is complicated in process, narrow in effective absorption bandwidth, incapable of simultaneously realizing multi-band effective absorption and the like are solved, and a wide prospect is provided for the design and application of a novel wave-absorbing material.

Images