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《工程(英文)》 >> 2023年 第20卷 第1期 doi: 10.1016/j.eng.2022.04.028

一种作为主动控制宽带吸波器的热可调超材料

State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China

收稿日期: 2021-09-28 修回日期: 2022-02-23 录用日期: 2022-04-29 发布日期: 2022-11-12

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摘要

近年来,超材料因其操纵电磁波的强大能力而受到越来越多的关注。然而,大多数先前报道的超材料无法动态调控超宽波段电磁波。在本文中,我们提出了一种使用具有不同相变温度的石蜡基复合材料(PDCs)来实现热可调谐宽带吸波的超材料结构体(T-TBM)。通过在不同相变温度下控制PD-Cs 的固液态,实现了从低频到高频的T-TBM反射损耗峰值的动态调控。T-TBM可以改变吸收峰值带宽(反射损耗值小于−30 dB),并且通过调整T-TBM 的温度依然满足宽带吸波(反射损耗值小于−10 dB)。实验结果表明,T-TBM中PD-Cs的相变恒温效应为在不同热条件下主动控制电磁波吸收响应提供了时间窗口。该器件在电磁吸收、智能超材料、多功能结构器件等领域具有广阔的应用前景。

补充材料

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