Image Reconstruction for a Perfectly Conducting Cylinder Buried in Slab Medium by TE Wave Illumination

摘要

The electromagnetic imaging of a perfectly conducting cylinder illuminated by transverse electric (TE) wave is investigated. A perfectly conducting cylinder of unknown shape buried in the second layer scatters the incident wave from the first layer or the third layer. The metallic cylinder with cross section described by the equation is illuminated by an incident plane wave whose magnetic field vector is perpendicular to the z axis (i.e., TE polarization). Based on the boundary condition and the recorded scattered field, a set of nonlinear integral equations is derived and the imaging problem is reformulated into an optimization problem. The genetic algorithm is then employed to find out the global extreme solution of the cost function. Numerical results demonstrated that, even when the initial guess is far away from the exact one, good reconstruction can be obtained.