周期性结构非正弦波散射机理及探测方法研究

项目名称： 周期性结构非正弦波散射机理及探测方法研究

项目编号： No.61271048

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 王均宏

作者单位： 北京交通大学

项目金额： 95万元

中文摘要： 周期性结构或包含周期性结构的目标和材料，如天线阵列、频率选择表面(FSS)、人工电磁材料等，在各类电磁波侦察和探测系统中发挥着重要作用，其散射特性对目标整体的可探测性具有非常重要的影响，目前的研究工作主要集中于频域。瞬变、快变、溅射等非正弦波能够从时间因果上追踪其与物体的相互作用过程，因而有可能从其散射波形中提取出目标的内部结构信息，从而使得原本希望的特性、如隐身等丧失，并可能由此发展新的非正弦波探测技术。本项目将对瞬变电磁波、快变电磁波以及正弦波被截断产生的溅射电磁波作用下、目标的散射机理和散射特性进行研究，包括一般目标、天线阵列、FSS、人工电磁材料、覆盖有FSS和人工材料的目标等；同时研究基于非正弦波散射波形中目标结构信息提取的非正弦波探测方法。本项目的研究将进一步完善电磁波散射理论，对探索新的非常规目标探测方法、评估现有周期性电磁结构性能、以及指导宽带周期性结构设计都具有重要意义。

中文关键词： 周期性结构；非正弦电磁波；电磁波散射；电磁波时域溅射；电磁波探测

英文摘要： Since the targets and materials of periodic structure or containing periodic structures, such as the antenna arrays, the frequency selective surfaces (FSS) and artificial electromagnetic materials, play an important role in various types of electromagnetic wave surveillance and detection systems, their scattering properties have a significant impact on the detectability of the overall target. The current studies mainly focus on the frequency domain. However, the transient, fast-changing, sputtering and other nonsinusoidal wave can track its interaction with the objects from the temporal causality. Therefore, it opens a possibility that the physical information of the target can be extracted from its scattering waveform, leading to the failure of achieving the originally designed characteristics, such as the loss of stealth and may thus develop a new detection technique utilizing the nonsinusoidal wave instead. The present project will carry a research on the scattering mechanism and properties of the target under the interaction with the transient electromagnetic wave, the fast-changing electromagnetic wave and the sputtering electromagnetic wave generated by the truncation of the conventional sinusoidal wave, including the ordinary structure, the antenna array, the FSS, the artificial electromagnetic materials

英文关键词： Periodic structure；non-sinusoidal electromagnetic wave；electromagnetic wave scattering；electromagnetic wave time domain sputtering；electromagnetic wave detection