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Electronics 2017, 6(4), 85; https://doi.org/10.3390/electronics6040085

Frequency and Polarization-Diversified Linear Sampling Methods for Microwave Tomography and Remote Sensing Using Electromagnetic Metamaterials

1
Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202, USA
2
Department of Electrical and Computer Engineering, Isfahan university of Technology, Isfahan 8415683111, Iran
3
Division of Engineering Technology, Wayne State University, Detroit, MI 48202, USA
4
Department of Electrical and Computer Engineering, Rutgers University, Piscataway, NJ 08854, USA
*
Author to whom correspondence should be addressed.
Received: 13 September 2017 / Revised: 9 October 2017 / Accepted: 16 October 2017 / Published: 18 October 2017
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Abstract

Metamaterial leaky wave antennas (MTM-LWAs), one kind of frequency scanning antennas, exhibit frequency-space mapping characteristics that can be utilized to obtain a sufficient field of view (FOV) and reconstruct shapes in both remote sensing and microwave imaging. In this article, we utilize MTM-LWAs to conduct a spectrally encoded three-dimensional (3D) microwave tomography and remote sensing that can reconstruct conductive targets with various dimensions. In this novel imaging technique, we employ the linear sampling method (LSM) as a powerful and fast reconstruction approach. Unlike the traditional LSM using only one single frequency to illuminate a fixed direction, the proposed method utilizes a frequency scanning MTM antenna array able to accomplish frequency-space mapping over the targeted 3D background that includes unknown objects. In addition, a novel technique based on a frequency and polarization hybrid method is proposed to improve the shape reconstruction resolution and stability in ill-posed inverse problems. Both simulation and experimental results demonstrate the unique advantages of the proposed LSM using MTM-LWAs with frequency and polarization diversity as an efficient 3D remote sensing and tomography scheme. View Full-Text
Keywords: inverse scattering; leaky wave antenna; linear sampling method; metamaterial; microwave tomography; polarization; remote sensing inverse scattering; leaky wave antenna; linear sampling method; metamaterial; microwave tomography; polarization; remote sensing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Salarkaleji, M.; Eskandari, M.; Chen, J.C.-M.; Wu, C.-T.M. Frequency and Polarization-Diversified Linear Sampling Methods for Microwave Tomography and Remote Sensing Using Electromagnetic Metamaterials. Electronics 2017, 6, 85.

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