基于FDM技术的填充型阶梯结构宽频吸波体
收稿日期: 2024-04-03
修回日期: 2024-05-06
录用日期: 2024-06-17
网络出版日期: 2024-07-01
基金资助
2022年产业技术基础公共服务平台(2022-232-223);水电机械设备设计与维护湖北省重点实验室开放基金(2022KJX 05)
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)
宽带吸收是吸波体向实际应用发展亟须解决的难题。基于熔融沉积成型（FDM）技术制备吸波体壳体，以自制的石墨烯（rGO）-Fe3O4/乙基纤维素（EC）复合微球为吸波剂，研究单元结构几何参数和材料层间分布对吸波性能的影响，通过归一化处理，分析等效阻抗匹配的变化特性。研究结果表明，该吸波体具有宽带吸收、极化无关特性和大角度吸收特性：该吸波体实物测试结果实现了2~18 GHz频段内99%带宽（2.1~18.0 GHz）的有效吸收（反射损耗低于-10 dB），两个反射损耗峰值的测试强度依次为-21.9、-24.1 dB，与CST仿真的2~18 GHz全频段有效吸收、峰值强度-20.6 dB和-20.1 dB的模拟结果相吻合；对于横电波（TE）极化而言，当入射角度为40°时仍然能维持15 GHz的有效吸收带宽，在50°时还能保持X、Ku波段的有效吸收。吸波体表现出的吸波性能归因于其合理的等效阻抗匹配调控，与此同时，其结构中梯度参数可显著增加电磁波的反射次数，充分利用了电磁波的衍射能力。
叶永盛 , 刘沁锋 , 贾瑞鹏 , 丁迪 , 焦未冬 , 叶喜葱 , 吴海华 , 何恩义 . 基于FDM技术的填充型阶梯结构宽频吸波体[J]. 航空学报, 2025 , 46(1) : 430486 -430486 . DOI: 10.7527/S1000-6893.2024.30486
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.
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