可调人工电磁材料在雷达智能隐身技术中的应用研究

This project will be based on the peculiar properties and design principles of various metamaterial. Tunable metamaterials are to be designed and utilized to ameliorate radar smart stealth materials, and their application on radar smart stealth technique are explored in this project. Firstly, the tunable curved Frequency Selective Surfaces(FSS)is to be studied, it is desired that the FSS has both absorbing and band-pass frequency band and each band can be steered independently. The curved FSS as a curved radome, which is propitious to the shaping stealth, is to be designed and combined with various practical antennas for analysis and measurement validation. Secondly, to construct a kind of AMC reflecting surface,in which each unit can be tuned independently,we will propose some advisable unit design models and analyze their arrangement on the given curve surfaces of some familiar stealth objects, and then explore the effective composite steering method for all of the tunable unit to control the direction of the reflected wave. At the same time, the research is to be carried out to construct some tunable ultra-thin RAMs, and the feasible design proposals will be proposed for them,these RAMs are required to have compact conformation, thin thickness , wide absorbing frequency bands and wide adjustable range, in addition, some tunable RAMs with one or more tunable absorbing frequency bands are also to be designed, and these experimental verifications will be carried out. The study result of the project will create new path for the development of radar smart stealth technology.

本项目将以各种人工电磁材料的有效性能及其设计原理为基础，设计出有效性能实时可调的人工电磁材料，将其用于雷达波智能隐身材料的开发，探索其在雷达波智能隐身技术中的应用。首先，将研究曲面布阵的、同时具有吸波与带通频带、并且两频带位置独立可调的FSS设计，设计出外形有利于目标外形隐身的FSS天线罩，与不同天线相结合进行分析，并制备出有效的实验结构进行实验验证；随后，以各单元独立可调的AMC反射面作为研究对象，提出有效的单元设计模型，将其与具体隐身目标相结合，分析其在不同曲面上的布阵方法，同时为实现对反射波方向的控制，寻找有效的调控方法；另外，将以基于可调人工电磁材料的薄超雷达吸波体设计作为研究内容，建立切实可行的设计方案，实现对结构紧凑、厚度薄、吸波频带宽、可调范围广或同时具有多个独立可调频带的雷达吸波体的设计，并辅之以有效的实验验证。课题研究结果可为雷达波智能隐身技术的发展开辟新的有效。

本项目按原计划，首先, 研究了各种类型的FSS天线罩的设计，为不同类型的FSS天线罩均提出了多种有效的设计方案，并对较好的设计方案进行了实验验证；随后分析了可调AMC反射面的工作原理，提出了多种可调AMC反射面的设计方案，并对其有效性进行了有效分析；最后，设计出了同时具有两个吸波频带且各频带独立可调的雷达吸波体，并制作了具体实验样本进行了有效测量。本项目先后资助发表了学术论文29篇，其中SCI收录19篇，同时还有多篇论文投稿在审，1篇论文录用待刊。