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Reconstruction of a Dielectric Cylinder with the Use of the T-Matrix and the Singular Value Decomposition

Kenichi ISHIDA

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Summary :

An algorithm is formulated for reconstructing a dielectric cylinder with the use of the T-matrix and the singular value decomposition (SVD) and is discussed through numerical examples under noisy conditions. The algorithm consists of two stages. At the first stage the measured data of scattered waves is transformed into the T-matrix. At the second stage we reconstruct the cylinder from the T-matrix. The singular value decomposition is applied in order to separate the radiating and the nonradiating currents, and the radiating current is directly obtained from the T-matrix. The nonradiating current and the object are reconstructed by decreasing a residual error of the current in the least square approximation, where linear equations are solved repeatedly. Some techniques are used in order to reduce the calculation time and to reduce the effects of noise. Numerical examples show us that the presented approach is simple and numerically feasible, and enables us to reconstruct a large object in a short time.

Publication
IEICE TRANSACTIONS on Communications Vol.E93-B No.10 pp.2595-2600
Publication Date
2010/10/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E93.B.2595
Type of Manuscript
Special Section PAPER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category
Electromagnetic Analysis

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