基于有源超表面的宽带电磁散射动态调控技术

项目名称： 基于有源超表面的宽带电磁散射动态调控技术

项目编号： No.61775218

项目类型： 面上项目

立项/批准年度： 2018

项目学科： 无线电电子学、电信技术

项目作者： 黄成

作者单位： 中国科学院光电技术研究所

项目金额： 16万元

中文摘要： 隐身技术作为未来先进作战平台的必备技术，引起研究人员的广泛兴趣。传统隐身技术以缩减RCS为主要目标，但被隐身后的目标电磁特征固化，在不同背景环境下易被探测和识别。近来出现的有源超表面技术虽能动态调控电磁散射特征，但其存在调控带宽窄等技术难题，难以满足实际需求。针对这些问题，本项目提出基于多物理场调控机制的有源超表面设计思路，以实现电磁散射特征的宽带动态调谐。通过深入研究有源超表面单元结构对散射波幅度、位相和极化的调控规律，获取电磁散射特征与单元结构布局之间的映射关系，并建立有源超表面对电磁散射特征动态调控的物理模型。在此基础上，突破有源超表面的宽带调控技术，掌握宽带有源超表面的实现方法，发展有源超表面的可编程优化算法和大尺寸制备工艺，完善测试方法；构造出宽带有源超表面，实现目标电磁特征的动态可控。本项目的开展有望推动该技术在隐身、电子对抗等领域的快速发展。

中文关键词： 超表面；动态调控；宽带；电磁散射

英文摘要： As a key technology of future advanced combatant platforms, stealth technology have caused great interest of scientists around the world. Traditional stealth technology mainly focuses on how to reduce RCS. However, under the different background environments, the hidden object covered by the absorbing material can be easily detected due to its invariable electromagnetic(EM) scattering property. Metasurface, as a new emerging material,is able to dynamically tune RCS, but some drawbacks, such as narrow tuning bandwidth and polarization-sensitivity, block its development in real application. In order to solve these issues, we propose a new method of using active metasurface to modulate multi-physical field for achieving dynamical control of RCS at a broad band. In this project, we mainly investigate how to tune amplitude, phase and polarization of scattering wave through active metasurface, acquiring the mapping relation of distribution for the unit cells and EM scattering pattern. Then the corresponding physical model of using active metasurface to achieve dynamcial control of RCS would be established.In addition, we need to overcome the bandwidth expansion technique of the active metasurface and acquire the design method for the wideband active metasurface. The optimization algorithm and programmable technique of the active metasurface is also required to be developed, with the large-scale fabriation technique and measurement method. Finally, a wideband active metasurface would be constructed for dynamically tuning RCS. The implemention of this project is expected to promote the rapid development of the corresponding technology in many fields, including stealth and electronic countermeasures.

英文关键词： metasurface;dynamical control;wideband;electromagnetic scattering