A multi-materials 3D-printed continuous conductive fibre-based metamaterial for broadband microwave absorption
Tongtong Zhang, Dichen Li, Zhen Yang, Yubing Duan, Ningyu Zhang, Ling Wang, Qingxuan Liang
Abstract
Electromagnetic pollution and military stealth technique have raised tremendous interest in highperformance microwave-absorbing structures.However, an ultra-broadband absorbing functional structure is still in urgent demand.Herein, a novel continuous conductive fibre-based absorbing metamaterial was successfully designed and fabricated by multi-materials hybrid 3D printing technique.Benefitting from the highly symmetric structured design of a super unit cell and appropriate conductive property of continuous fibre, the absorbing metamaterial is demonstrated to have an ultra-wide band microwave absorption and polarisation insensitivity.Furthermore, the thickness of the proposed metamaterial is only 3.2 mm of 0.085max.In the wave absorption test, the metamaterial shows a broadband absorption of 8-18.1 GHz (greater than 90%) and maintains a good absorption effect at an incident angle of 40.The design and fabrication method of the continuous fibre-absorbing metamaterial provides a new idea for the realisation of the integrated bearing and absorbing metamaterial, which will greatly promote the practical application of absorbing metamaterial.