基于时间反演电磁波近场超分辨率特性的微波无损检测研究

项目名称： 基于时间反演电磁波近场超分辨率特性的微波无损检测研究

项目编号： No.61301271

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 王晓华

作者单位： 电子科技大学

项目金额： 28万元

中文摘要： 如何利用目标体近场电磁波所携带的丰富信息反演目标精细结构特征是探测与成像领域的研究热点，也是极富挑战性的基础性研究课题。本项目旨在基于时间反演电磁波的近场超分辨率聚焦特性，研究含亚波长微结构的多尺度目标近场电磁特性，并将其应用到含精细结构目标的无损检测之中。研究包括：(1)将近场超分辨率信息有效获取并传递到远场成像设备的关键技术；(2)高效、高精度、高稳定性的时间反演超分辨率成像算法；(3)基于时间反演技术对含精细结构的多尺度目标进行超分辨率无损检测的实验验证。通过理论分析、电磁仿真、实验验证，为时间反演电磁波近场超分辨率无损检测提供可靠的理论分析依据、高效的探测方法、高性能的成像算法以及经过原理性实验验证的初始模型。

中文关键词： 电磁无损检测；时间反演；超分辨率；亚波长；电磁成像

英文摘要： How to ultilize the rich informations, carried by electromagnetic wave in the near-field region of target, to reverse the fine structure characteristics is a hot research in detection and imaging. It is also a challenging fundamental research. In this project, the near-field super-resolution focusing characteristics of the multiscale targets with subwavelength micro-structures will be researched based on time-reversal electromagnetics. And it will be applied to nondestructive evaluation for the targets with fine structures. The researches are including:(1)the key technique of efficiently getting and transporting near-field super-resolution informations to the far-field imaging devices, (2)the research on time reversal super-resolution imaging algorithm with high efficiency, high accuracy, and high stability, (3)experimental verification for the near-field super-resolution nondestructive evaluation of multiscale targets with fine structures by time-reversal technique. By theoretical analysis, electromagnetic simulati on and experimental verification, the reliable theoretical analysis, high efficency detective method, high performance imaging algorithms, and some initial models verified by principle experiments will be provided for nondestructive evaluation based on the time reversal near-field super-resolution ch

英文关键词： Electromagnetic Non-Destructive Evaluation；Time Reversal；Super Resolution；Subwavelength；Electromagnetic Imaging