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Microwave imaging of two‐dimensional dielectric cylinders with a multiscaled frequency hopping approach
Author(s) -
Thomas Vinu,
Gopakumar C.,
Lonappan Anil,
Bindu G.,
Hamsakutty V.,
Mathew K.T.
Publication year - 2004
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.20467
Subject(s) - microwave , inverse scattering problem , inverse problem , inverse , microwave imaging , dielectric , profiling (computer programming) , algorithm , scattering , mathematical optimization , computer science , optics , mathematics , physics , mathematical analysis , telecommunications , geometry , optoelectronics , operating system
A multiscaled multifrequency method for inverse profiling of 2D dielectric cylinders is presented. The inverse problem is solved at all frequency hops using a multiscale scheme: the problem is solved at a coarse resolution where it is more stable, and this solution is used as a starting estimate for solving the problem at progressively increasing scales. Multiscaling reduces the risk of the solution getting trapped in a local minimum with respect to the deterministic optimization method employed for the inverse‐scattering problem. Thus, better initial estimates are provided for the iterations at higher frequencies. Testing the strategy on synthetic multifrequency data provides promising results. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 353–355, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20467