Identification of Small Objects with Near-Field Data in Quasi-Backscattering Configurations

AbstractThis paper is concerned with the inverse scattering problem for the three-dimensional Maxwell equations in bi-anisotropic periodic structures. The inverse scattering problem aims to determine the shape of bi-anisotropic periodic scatterers from electromagnetic near-field data at a fixed frequency. The factorization method is studied as an analytical and numerical tool for solving the inverse problem. We provide a rigorous justification of the factorization method which results in the unique determination and a fast imaging algorithm for the periodic scatterer. Numerical examples for imaging three-dimensional periodic structures are presented to examine the efficiency of the method.

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Estimating Far-Field Emissions From Simulated Near-Field Data With Artificial Neural Networks

IEEE Transactions on Magnetics ◽

10.1109/tmag.2013.2282354 ◽

2014 ◽

Vol 50 (2) ◽

pp. 205-208

Author(s):

Luciana Firmino ◽

Adroaldo Raizer ◽

Yves Marechal

Keyword(s):

Neural Networks ◽

Artificial Neural Networks ◽

Field Data ◽

Near Field ◽

Far Field ◽

Field Emissions ◽

Artificial Neural

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Single-Cut Antenna Characterization from Near Field Data

2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting ◽

10.1109/ieeeconf35879.2020.9329502 ◽

2020 ◽

Author(s):

Amedeo Capozzoli ◽

Claudio Curcio ◽

Angelo Liseno

Keyword(s):

Field Data ◽

Near Field

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USE OF RIGID REFLECTORS FOR THE VIRTUAL INCREASE OF FIELD DATA IN THE NEAR-FIELD ACOUSTICAL HOLOGRAPHY

Journal of Computational Acoustics ◽

10.1142/s0218396x07003202 ◽

2007 ◽

Vol 15 (01) ◽

pp. 49-61 ◽

Cited By ~ 1

Author(s):

SUNG-IL KIM ◽

JEONG-GUON IH ◽

JI-HOON JEONG

Keyword(s):

Boundary Element Method ◽

Transfer Matrix ◽

Field Data ◽

Near Field ◽

Measurement Data ◽

Source Reconstruction ◽

Matrix Equations ◽

Inverse Boundary ◽

Additional Information ◽

Acoustical Holography

This paper suggests the use of rigid reflectors to provide additional information for source reconstruction in near-field acoustical holography based on the inverse boundary element method. The additional field pressure and transfer matrix equations introduced provide a virtual increase in the measurement data without increasing the number of sensors or altering their arrangement, which could cost more than using reflectors. In order to validate this method, we successfully reconstruct a vibrating ellipse.

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