超薄电磁屏蔽光窗超材料吸波器

发布时间：2018-02-26 07:00

本文关键词： 材料超材料电磁吸波器微波谐振　出处：《光学学报》2017年08期 　论文类型：期刊论文

【摘要】：提出并验证了一种新型超薄微波超材料吸波器设计。该超材料吸波器由三层金属结构层和两层介质材料层组合而成,并采用两个相同的金属圆环作为双层复合谐振结构单元。该设计与传统的单层谐振结构单元相比,不仅大大减小了吸波器整体结构厚度,而且有效提高了电磁波吸收率。利用有限元电磁模拟对该吸波器内部的空间电磁场及表面电流分布进行仿真与分析,阐述了其电磁吸波物理机理。模拟和实验结果均证实该吸波器具有极化不敏感及宽角度入射稳定特性。该超薄超材料电磁吸波器整体结构简单,占空比低,在电磁屏蔽光窗等领域具有潜在应用。
[Abstract]:The design of a novel ultra-thin microwave supermaterial absorber is proposed and verified. The super material absorber consists of three layers of metal structure and two layers of dielectric material. Two same metal rings are used as double-layer composite resonant structure elements. Compared with the conventional single-layer resonant structure unit, this design not only greatly reduces the thickness of the whole structure of the absorber. The electromagnetic field and surface current distribution inside the absorber are simulated and analyzed by finite element electromagnetic simulation. The physical mechanism of electromagnetic wave absorption is described. The simulation and experimental results show that the microwave absorber has the characteristics of polarization insensitivity and wide angle incidence stability. The whole structure of the ultra-thin ultra-material electromagnetic wave absorber is simple and the duty cycle is low. It has potential application in electromagnetic shielding optical window and other fields.
【作者单位】：中国科学院上海光学精密机械研究所强激光材料重点实验室;中国科学院大学;
【基金】：国家自然科学基金(61405224) 上海市自然科学基金(14ZR1445000)
【分类号】：O441.4;TB34

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