Reconstruction of a large and high-contrast penetrable object by using the genetic and Levenberg–Marquardt algorithms
✍ Scribed by Sang-Yong Yang; Hong-Ki Choi; Jung-Woong Ra
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 184 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
A large and high-contrast two-dimensional dielectric object is reconstructed from the measured scattered fields by using a hybrid optimization algorithm combining the genetic algorithm and the Le¨enberg᎐Marquardt algorithm. Ill-posedness is filtered out by using the effecti¨e angular modes excluding the e¨anescent modes, and multiple incidences of plane wa¨es of multifrequencies are used to reconstruct a dielectric object of its size, 3 = 3 wa¨elengths, and its relati¨e permitti¨ity 4.0 in presence of 10% Gaussian noise in the scattered fields. Object size is enlarged by using the large discretized cells up to 0.5 wa¨elength di¨ided by the square root of relati¨e permitti¨ity.