中文题目: 超薄电磁屏蔽光窗超材料吸波器
外文题目: Ultra-Thin Metamaterial Absorber for Electromagnetic Window Shielding
作者: 白正元; 姜雄伟; 张龙
刊名: 光学学报
年: 2017 卷: 37 期: 8 文章编号：816003
中文关键词:
材料; 超材料; 电磁吸波器; 微波; 谐振
英文关键词:

materials; metamaterials; electromagnetic absorber; microwaves; resonance
中文摘要:
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。

英文摘要:
A novel ultra-thin microwave metamaterial absorber design is proposed and experimentally demonstrated. The metamaterial absorber consists of three metallic structural layers and two dielectric-material layers.Two identical metallic circular rings are used as the double composite resonant structural units.Compared to the traditional resonant unit with a single-layered pattern,this new design has an efficient enhancement in the absorptivity of electromagnetic wave as well as an obvious reduction in the thickness of the whole structure.The electromagnetic simulation based on the finite element method is employed to simulate and analyze the distributions of inner spatial electromagnetic field and surface current of this absorber,and the absorption mechanism of electromagnetic waves is expounded.The simulated and experimental results both confirm this absorber is polarization-independent and stable for the wide oblique angle incidence.This ultra-thin metamaterial absorber with a simplified structure and a low duty cycle has potential applications in many practical areas such as electromagnetic window shielding.


文献类型: 期刊论文
正文语种: Chinese
收录类别: CSCD
DOI: 10.3788/AOS201737.0816003


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