Frequency dependence on image reconstruction for a buried conductor

The frequency dependence of image reconstruction for a buried imperfectly conducting cylinder is investigated. A conducting cylinder of unknown shape and conductivity is buried in one half-space and scatters the incident wave from another half-space. By using the measured scattered field, the image problem is reformulated into an optimization problem and solved by the genetic algorithm. The frequency dependence of image reconstruction is investigated and numerical results show that the reconstruction is quite good in the resonant frequency range. On the contrary, if the frequency is too high or too low the reconstruction becomes bad. It is worth noting that the present work provides not only comparative information but quantitative information