Graphene reinforced resin matrix composites have low density and excellent electromagnetic wave absorption properties

and are highly promising radar stealth absorbing materials. However

traditional graphene absorbing composite materials have complicated processes

making it difficult to prepare and manufacture complex structures. As an artificial electromagnetic medium

metamaterial is designed based on the electromagnetic properties of the material

and can realize the design of high-performance metamaterial absorber (MMA) through the design of unit cell structure

and can achieve the integrated manufacture of resin matrix MMA functional structure

taking advantages of rapid prototyping for complex structural parts using 3D printing technology. The research progress of the absorbing properties of graphene reinforced resin matrix composites and 3D printing metamaterials is emphasized. A 3D printed graphene reinforced polylactic acid composite gradient metamaterial absorbing structure based on wood pile structure is proposed. In the 4.5–40GHz band

this structure has an ultra broadband microwave absorption performance of 35.5GHz (reflection loss below –10dB).