导航

Acta Aeronautica et Astronautica Sinica ›› 2025, Vol. 46 ›› Issue (1): 430486.doi: 10.7527/S1000-6893.2024.30486

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Broadband wave absorber with filled step-structured design using FDM technology

Yongsheng YE1,2, Qinfeng LIU1,2, Ruipeng JIA3, Di DING4, Weidong JIAO1,2, Xicong YE1,2, Haihua WU1,2, Enyi HE1,2()   

  1. 1.College of Machinery and Power Engineering,China Three Gorges University,Yichang  443002,China
    2.Graphite Additive Manufacturing Technology and Equipment Hubei Engineering Research Center,China Three Gorges University,Yichang  443002,China
    3.Confederation of Chinese Metalforming Industry,Beijing 102206,China
    4.Jiangsu Branch of China Academy of Machinery Science and Technology Group Co. ,Ltd,Changzhou  213164,China
  • Received:2024-04-03 Revised:2024-05-06 Accepted:2024-06-17 Online:2025-01-15 Published:2024-07-01
  • Contact: Enyi HE E-mail:heenyi@ctgu.edu.cn
  • Supported by:
    2022 Industrial Technology Foundation Public Service Platform(2022-232-223);Hubei Provincial Key Laboratory of Hydropower Machinery and Equipment Design and Maintenance Open Fund(2022KJX 05)

Abstract:

Broadband absorption poses a significant challenge in the development of wave absorbers for practical applications. We utilized Fused Deposition Modeling (FDM) technology to fabricate the absorber shell, by employing homemade Graphene (rGO)-Fe3O4/Ethyl Cellulose Ethoce (EC) composite microspheres as the absorber material. We investigated the influence of geometric parameters of the unit structure and the inter-layer distribution of materials on the absorption performance, and analyzed the variation characteristics of equivalent impedance matching through normalization. Our findings demonstrate that the absorber exhibits broadband absorption, polarization-independent characteristics, and large-angle absorption properties. Physical testing of the absorber reveals a 99% effective absorption (reflection loss less than -10 dB) bandwidth (2.1 GHz to 18.0 GHz) within the 2 GHz to 18 GHz range, with peak reflective loss intensities of -21.9 dB and -24.1 dB, respectively. These results closely align with CST simulations, demonstrating effective absorption and peak intensities of -20.6 dB and -20.1 dB over the entire 2 GHz to 18 GHz range. For Transverse Electric Wave (TE) polarization, the absorber maintains a 15 GHz effective absorption bandwidth at an incident angle of 40°, and effective absorption in the X and Ku bands at 50°. The absorber's performance is attributed to well-regulated equivalent impedance matching, while the gradient parameters within its structure significantly increase the number of electromagnetic wave reflections, thereby fully utilizing the diffraction capabilities of electromagnetic waves.

Key words: wave absorber, graphene, electromagnetic wave, broadband absorption, equivalent impedance matching

CLC Number: