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RF Tomography in Free Space: Experimental Validation of the Forward Model and an Inversion Algorithm Based on the Algebraic Reconstruction Technique

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posted on 27.01.2014 by Vittorio Picco, Tadahiro Negishi, Shingo Nishikata, Douglas Spitzer, Danilo Erricolo
Radio-frequency tomography was originally proposed to image underground cavities. Its flexible forward model can be used in free-space by choosing an appropriate dyadic Green’s function and can be translated in the microwave domain. Experimental data are used to validate a novel inversion scheme, based on the algebraic reconstruction technique. The proposed method is improved by introducing physical bounds on the solution returned. As a result, the images of the dielectric permittivity profiles obtained are superior in quality to the ones obtained using classical regularization approaches such as the truncated singular value decomposition. The results from three experimental case studies are presented and discussed.

Funding

This research was supported by AFRL through Grant FA9550-12-1-0174, by RNET and AFRL through Grant FA8659010-D-1750, and the UIC Chancellor Undergraduate Research Award.

History

Publisher

Hindawi Publishing Corporation

Language

en_US

issn

1687-5869

Issue date

22/05/2013

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