Summary
International Symposium on Antennas and Propagation
2006
Session Number:3C2b
Session:
Number:3C2b-5
Microwave Imaging of Dielectric Cylinders Using the Multigrid Optimization Method
Mitsuru Tanaka, Toshiynki Takada, Kazuki Yano,
pp.1-4
Publication Date:2006/11/2
Online ISSN:2188-5079
Summary:
This paper investigates the image reconstruction of lossy dielectric cylinders based on the multigrid optimization method (MGOM), which consists of the conjugate gra- dient method (CGM), the frequency-hopping technique (FHT), and the multigrid method (MGM). The inverse scattering problem is reduced to an optimization problem where a cost functional is minimized to obtain the contrast function. A fast reconstruction algorithm of estimating the relative permittivities of the objects is presented with multifrequency scattering data in microwave region. Some numerical results for dielectric circular cylinders confirm the effectiveness of the proposed method.