基于相移偏移的分层介质微波成像方法(英文)

刘媛; 陈洁; 方广有; 阴和俊

doi:10.12000/JR14152

Microwave Imaging of Layered Medium Based on Phase Shift Migration

DOI: 10.12000/JR14152

1.
① Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2.
Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China;
3.
③ University of Chinese Academy of Sciences, Beijing 100049, China;
4.
Chinese Academy of Sciences, Beijing 100864, China

Funds:

Supported by the National High Technology Research and Development Program of China (863 Program) (2012AA061403).

摘要

Abstract:
The classical Frequency-Wavenumber (F-K) imaging algorithm can efficiently reconstruct the image for homogeneous medium; however, it cannot generate focused and properly-located images for layered medium. Considering the electrical properties of individual layer and the discontinuity between layers, the phase shift migration for layered medium is derived in this paper. The analysis on the backscattered transfer function shows that some assumptions and mathematical approximations are applied in the proposed method. The numerical and experimental results are presented to show the feasibility of the proposed method for real-time imaging of layered medium.
- Microwave imaging /
- Layered medium /
- Phase Shift Migration (PSM) /
- Backscattered transfer function
摘要:
传统的频率-波数域成像方法能有效地重建均匀介质中的目标图像,但对于分层介质,不能生成聚焦的图像,而且目标也无法准确定位.考虑到各层介质介电常数的差异和层间的不连续性,该文推导了适用于分层介质的相移偏移成像方法.并由分层介质中点目标的散射传递函数,分析了成像方法所做的假设和数学近似.通过仿真模拟和试验,验证了所提的方法适用于分层介质实时成像.
- 微波成像 /
- 分层介质 /
- 相移偏移 /
- 后向散射传输函数

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