Affiliations: [a] Department of Computer Technology and Mobile
Communication, Taipei College of Maritime Technology, New Taipei City, Taiwan | [b] Department of Electrical Engineering, Tamkang
University, New Taipei City, Taiwan
Correspondence:
[*]
Corresponding author: C.-H. Huang, Department of Computer
Technology and Mobile Communication, Taipei College of Maritime Technology, New
Taipei City, 25137, Taiwan. E-mail: chhuang@mail.tcnt.edu.tw
Abstract: In this paper, we apply the DDE algorithm to solve the inverse
scattering problem for which a two-dimensional (2-D) dielectric cylinder with
unknown cross section is buried in a dielectric slab medium. Finite difference
time domain method (FDTD) is used to solve the scattering electromagnetic wave
of a dielectric cylinder. The inverse problem is resolved by an optimization
approach and the global searching scheme dynamic differential evolution (DDE)
is then employed to search the parameter space. By properly processing the
scattered field, some EM properties can be reconstructed. One is the location
of the dielectric cylinder; the others are the shape of the dielectric cylinder
and permittivity of the dielectric cylinder. This method is tested by several
numerical examples, and it is found that the performance of the DDE is robust
for reconstructing the dielectric cylinder. Numerical simulations show that
even when the measured scattered fields are contaminated with Gaussian noise,
the quality of the reconstructed results obtained by the DDE algorithm is very good.
