ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Broadband wave absorber with filled step-structured design using FDM technology
Received date: 2024-04-03
Revised date: 2024-05-06
Accepted date: 2024-06-17
Online published: 2024-07-01
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)
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.
Yongsheng YE , Qinfeng LIU , Ruipeng JIA , Di DING , Weidong JIAO , Xicong YE , Haihua WU , Enyi HE . Broadband wave absorber with filled step-structured design using FDM technology[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(1) : 430486 -430486 . DOI: 10.7527/S1000-6893.2024.30486
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