Two dimensional microwave imaging of shielded objects
Journal Title: Вісник НТУУ КПІ. Серія Радіотехніка, Радіоапаратобудування - Year 2014, Vol 0, Issue 58
Abstract
Introduction. Microwave imaging is noninvasive method for determination objects internal structure (complex dielectric permittivity) by means of electromagnetic fields. Algorithm for solving microwave imaging problem of two-dimensional shielded objects is described. Methods. The direct problem is solved by finite element method, inverse problem by iterative Newton-Gauss method using Tikhonov regularization. Sensitivity matrix is calculated with numerically efficient method based on the reciprocity principle. Results. Solution of the inverse problem without noise makes it possible to determine the value of the dielectric constant of each element of the object up to a third mark. In the case of incorporation of noise, results of the inverse problem solution are unsatisfactory, since the algorithm converges only with significant signal/noise ratio. Conclusions. Further work should be directed to improve algorithm for solving the inverse problem, especially on the algorithm of calculating the sensitivity matrix.
Authors and Affiliations
E. Guseva, M. Gorb
Keywords
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- EP ID EP308877
- DOI 10.20535/RADAP.2014.58.35-46
- Views 74
- Downloads 0
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