基于低频超材料的吸波层板复合材料及多电磁损耗机制耦合效应研究

项目名称： 基于低频超材料的吸波层板复合材料及多电磁损耗机制耦合效应研究

项目编号： No.51503192

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 宫元勋

作者单位： 中国航天科工飞航技术研究院

项目金额： 21万元

中文摘要： 本项目将低频吸波超材料与阻抗渐变式电磁匹配结构相结合，设计制备了具有优异宽频吸波性能及良好力学承载能力的结构吸波复合材料，对多电磁波耗散机制耦合效应以及材料力学性能/吸波性能协同优化中的难点问题进行系统研究。通过混杂组元低频超材料的引入成功突破了材料厚度对低频吸波性能的限制，显著改善了薄厚度条件下吸波复合材料的低频吸波性能，大幅拓展了材料的有效吸波带宽。本项目分别就低频吸波超材料结构、阻抗渐变材料电磁特性以及多层阻抗渐变材料叠层结构等因素对吸波性能及力学性能的影响展开研究，获得影响规律、阐明影响机制。通过电磁仿真技术对低频吸波超材料以及多损耗机制下吸波复合材料的电磁传输行为进行研究，获得多损耗机制下吸波复合材料的电磁传输模型，掌握材料宽频电磁匹配结构调控规律，并据此对复合材料的吸波结构进行优化设计。此项目的实施可为多损耗机制吸波复合材料的研制提供理论基础，推动宽频吸波复合材料技术的进步。

中文关键词： 超材料；阻抗渐变；吸波复合材料；电磁特性；吸波性能

英文摘要： A new-type structual microwave absorbing composites (MAC) based on the co-operation of low-frequency microwave absorbing metamaterial and impedance gradiual changing structure is designed and prepared, which is proved to be possessed exellent microwave absorbing performance as well as perfect mechanical properties. In the current work the problems in the fields of microwave dissipation mechanism under multiple microwave absorbing theory and optimization of mechanical properties in cooperation with microwave absorbing properties is systemicly studied. Low frequency microwave absorbing metamaterial is introduced to break the limit of materials thickness on the microwave absorbing performance in the region of low frequency.The influence of low-frequency metamaterial structure, electromagnetic properties and lamination structure of impedance gradiation material on the EMA performance and mechanical properties is studied to obtain the relevant principle and to clarify the mechanism. The electromagnetic transmission theory will be studied by using electromagnetic simulation method. The transmission model of electromagnetic wave in the conposites with multi microwave dissipation mechanism will be construct. A theoretical fundamental can be found through the current work, which is beneficial for the investigation of wideband EMA composites and the solving of EMA problem in the low frequency with thin material thickness. The current work is believed to be helpful to promote the development and application of wideband microwave absorbing composites.

英文关键词： Metamaterial;Impedance gradiation;Microwave absorbing composites;Electromagnetic properties;Microwave absorbing performance