Journal ArticleDOI
Improvement of quasi-monostatic frequency-swept microwave imaging of conducting objects using illumination diversity technique
Chao-Hsiung Tseng,Tah-Hsiung Chu +1 more
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TLDR
In this article, a quasi-monostatic frequency-swept microwave imaging system using illumination diversity technique is proposed to have an efficient scattered field acquisition arrangement, where the image reconstruction principle is developed under physical optics approximation.Abstract:
A quasi-monostatic frequency-swept microwave imaging system using illumination diversity technique is proposed to have an efficient scattered field acquisition arrangement. The measurement system, calibration method, and experimental results are presented. The image reconstruction principle is developed under physical optics approximation. Reconstructed images of the continuous, discrete conducting objects and B-52 model aircraft measured in the frequency range 7.5-12.5 GHz are shown to be in good agreement with the scattering object geometries. The images reconstructed with and without using illumination diversity technique are presented to illustrate the effectiveness of the developed microwave imaging system.read more
Citations
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K-Space Aware Multi-Static Millimeter-Wave Imaging
TL;DR: Using the proposed structure and algorithm, the average improvement in peak-signal-to-noise ratio, structural similarity index measure, and digital image correlation metrics of 3.03, 0.22, and 0.173 dB are achieved.
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The Mutual Coupling Reduction between Two J-Shaped Folded Monopole Antennas for Handset
TL;DR: A method to reduce mutual coupling between two J-shaped folded monopole antennas (JFMAs), which cover the IEEE 802.11 b/g (2400-2484MHz) band is proposed and it is shown that the JFMA is effective when miniaturized.
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Dispersion characteristics of optical fibers under PEMC twists
TL;DR: In this article, the dispersion behavior of twisted clad optical fibers is investigated under the situation of sheath helix of perfect electromagnetic (PEMC) conductor introduced at the core-clad interface.
Journal ArticleDOI
Optimal Illumination Schemes for Near-Field Microwave Imaging
TL;DR: Here, ANI is achieved with four transmitting antennas, and its implementation is investigated in a planar scanning scenario, proving that at least two-fold improvement in the spatial resolution can be achieved in near-field imaging scenarios compared to the conventional single-source illumination.
Proceedings ArticleDOI
Application of micro-genetic algorithm (MGA) to monostatic microwave local imaging of PEC cylinder
Tao Wei,Cheng Liao,Yunlin Liu +2 more
TL;DR: In this paper, a single-illumination single-view (SISV) approach is proposed and the optimization is realized by means of the micro-genetic algorithm (MGA).
References
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High resolution radar imaging
TL;DR: In this article, the authors proposed a high-resolution radar imaging system for high resolution radar imaging, which can be found in the High-Resolution Radar Imaging (HRIMI) project.
Journal ArticleDOI
Physical optics inverse diffraction
TL;DR: In this paper, a general method for solving the inverse diffraction problem is presented based on an identity of Bojarski which states that \gamma(x) and \Gamma(p) are a Fourier transform pair.
Journal ArticleDOI
A survey of the physical optics inverse scattering identity
TL;DR: In this paper, the physical optics approximation is applied to the acoustic and electromagnetic direct scattering integral representation, yielding an inverse scattering identity which relates the characteristic function of a scatterer to the three-dimensional spatial Fourier transform of the augmented far-field scattering amplitude.
Journal ArticleDOI
Prospects for three‐dimensional projective and tomographic imaging radar networks
TL;DR: In this paper, the authors demonstrate the feasibility of broadband and speckle-free projective imaging of a complex shaped scattering object in the 6-17 GHz range with centimeter resolution.