Results 251 to 260 of about 184,235 (277)

Machine Learning For Microwave Imaging

2020 14th European Conference on Antennas and Propagation (EuCAP), 2020
This paper proposes a fully-connected artificial neural network (ANN) approach for addressing the full-wave inverse scattering problem in a quantitative fashion. The proposed scheme processes the scattered field samples collected at receivers locations and provides as output an estimate of the unknown complex permittivity in strongly non-linear ...
Ambrosanio M., Franceschini S., Baselice F., Pascazio V.   +3 more
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Imaging Techniques for Microwave Diagnostics

Contributions to Plasma Physics, 2011
AbstractImaging diagnostics, such as Electron Cyclotron Emission Imaging (ECEI) and Microwave Imaging Reflectometry (MIR), exhibit unique characteristics that make them particularly well suited to the validation of theoretical models for plasma instabilities and turbulent fluctuations.
Tobias, B., Donne, A.J. H., Park, H.K., Boom, J.E., Choi, M.J., Classen, I.G.J., Domier, C.W., Kong, X., Lee, W., Liang, T., Luhmann, N.C., Munsat, T., Yu, L., Yun, G.S.   +13 more
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2D microwave imaging reflectometer electronics

Review of Scientific Instruments, 2014
A 2D microwave imaging reflectometer system has been developed to visualize electron density fluctuations on the DIII-D tokamak. Simultaneously illuminated at four probe frequencies, large aperture optics image reflections from four density-dependent cutoff surfaces in the plasma over an extended region of the DIII-D plasma.
A G, Spear, C W, Domier, X, Hu, C M, Muscatello, X, Ren, B J, Tobias, N C, Luhmann   +6 more
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Microwave imaging excavator

Second International Conference on Detection of Abandoned Land Mines, 1998
MIcrowave Imaging eXcavator (MIIX) is based on transmitting and receiving antennas mounted within a cylindrical auger, a stepped frequency CW transmitter/receiver, and an artificial neural network (ANN) imaging processor, all controlled by a small computer.
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Breast Phantoms for Microwave Imaging

IEEE Antennas and Wireless Propagation Letters, 2014
Herein, we study the dielectric properties of various mixtures susceptible to be used in manufacturing of reference inhomogeneous breast phantoms dedicated to the experimental validation of microwave breast imaging systems in the 0.5-6-GHz frequency range.
Joachimowicz, Nadine, Conessa, Christophe, Henriksson, Tommy, Duchêne, Bernard   +3 more
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Microwave thermoacoustic tomographic (MTT) imaging

Physics in Medicine & Biology, 2021
Abstract Microwave thermoacoustic tomography (MTT) uses microwave pulse-induced thermoelastic pressure waves to form planar or tomographic images. Since the generation and detection of thermoelastic pressure waves depends on dielectric permittivity, specific heat, thermal expansion, and acoustic properties of tissue, microwave ...
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Superhigh image resolution for microwave imaging

International Journal of Imaging Systems and Technology, 1990
AbstractAlgorithms for extrapolating the scattered field along the frequency direction and the azimuthal direction are developed and analyzed. Their effects on the image resolution for polar format processing and rectangular format processing are discussed.
Hsueh‐Jyh Li, Ta‐Yung Liu, Sheng‐Hui Yang   +2 more
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Quantitative microwave imaging with a 2.45-GHz planar microwave camera

IEEE Transactions on Medical Imaging, 1998
This paper presents microwave tomographic reconstructions of the complex permittivity of lossy dielectric objects immersed in water from experimental multiview near-field data obtained with a 2.45-GHz planar active microwave camera. An iterative reconstruction algorithm based on the Levenberg-Marquardt method was used to solve the nonlinear matrix ...
Franchois, A., Joisel, Alain, Pichot, Christian, Bolomey, J.-C.   +3 more
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Verification using spaceborne microwave imaging

IEEE Technology and Society Magazine, 1991
Synthetic aperture radar (SAR) imaging for arms control verification is discussed. SAR images are particularly suited for verification purposes because their image resolution capabilities are independent of weather conditions, surface penetration, and lighting. Their restrictions are related to data handling and power requirements.
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Passive Microwave Imaging

2009
Although the theme of this book is radar remote sensing, imaging with passive microwave is a complementary technology that warrants an introduction to identify its role alongside radar. This chapter lays the framework for passive microwave imaging, drawing in part from the scattering treatment developed for imaging radar in Chapt ...
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