| 摘要: |
| 为了适应现代武器设备在低频端的应用和对于吸波性能的要求，基于电磁超材料理论，利用电磁谐振特性设计了一种在P/L波段工作的大带宽轻质柔性吸波体。当电磁波入射到该新型吸波体，根据电磁感应作用机理，会在吸波体表面产生感应电流，通过装载集总电阻的方式，可将入射电磁波的能量转化为热能，从而实现对于电磁波的有效吸收。对于吸波体单元结构形状和尺寸的设计使得该吸波体具有两处谐振频点，并通过多谐振频率的耦合进一步展宽吸波带宽。仿真和实测结果验证了吸波体的优良性能。其工作频段为382~1 419.4 MHz，相对带宽为140.9%，吸波层厚度仅为0.2 mm，在保证大带宽的同时具有重量轻、可共形的优点，在转台曲面吸波、雷达隐身等领域具有广阔的应用前景。 |
| 关键词: 电磁超材料 P/L波段 柔性吸波体 |
| DOI：10.20079/j.issn.1001-893x.231126004 |
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| 基金项目:军科委基础加强计划项目（2022-JCJQ-JJ-0230） |
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| A Lightweight and Flexible Metamaterial Absorber with Broad Bandwidth in P/L Band |
| LI Shixian,WU Weiwei,CUI Kaibo,WANG Fuxing,XU Yixuan |
| (State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,National University of Defense Technology,Changsha 410073,China) |
| Abstract: |
| In order to adapt to the application of modern weapons and equipment in the low-frequency range and the requirements for absorbing performance,based on the theory of electromagnetic metamaterials,a lightweight and flexible absorber with broad utilizing electromagnetic resonance characteristics bandwidth operating in P/L band is proposed.When electromagnetic waves are incident on this new absorber,according to the mechanism of electromagnetic induction,induced currents will be generated on the surface of the absorber.The energy of incident electromagnetic waves can be converted into heat through lumped resistors,achieving effective absorption of electromagnetic energy.The design of the shape and size of the absorber unit structure enables this structure to have dual resonance frequencies,and coupling multiple resonance frequencies broadens the absorption bandwidth.Simulation and experimental results have verified excellent performance of the absorber.Its operating frequency range is 382~1 419.4 MHz with a relative bandwidth of 140.9%.The thickness of the absorbing layer is only 0.2 mm.It offers advantages such as light weight and conformal design while maintaining a large bandwidth,making it highly promising for applications involving curved wave absorption and radar stealth technology. |
| Key words: electromagnetic metamaterials P/L band flexible absorber |
