Özet:

In this study, an effective microwave reverse distraction approach is recommended for the imaging of dielectric hairstyles buried in silinder-shaped objects known for electrical and geometric characteristics. This approach is based on the use of the Contrast Source (CSI) method, an iterative nonlinear inversion method. However, in the problem addressed, the application of the CSI by assumption of the background empty space, as it is widely done in different problems, often gives unsatisfactory results, even if the pre-known characteristics of the cylindrical structure are selected as the first estimate of the iterative process. Therefore, the electrical and geometric characteristics are known as the cylindrical structure background defined and the reverse fooling problem relating to the buried object is solved by applying CSI. Although such a approach significantly improves the performance of the CSI, it requires the numeric achievement of the background area, i.e. the total electric area in the absence of the embedded body, and the Green function related to the background. In order to reduce the additional calculation costs that will appear, the current problem has been adapted to the current approach of flat-blowing, which we have previously suggested, to the expression of the electric field as a series of cylindrical functions and the continuity relationships on the surfaces. Furthermore, for homogeneous hairstylists, the adaptation of a binary viewing approach in which the contrast function is expressed as a two-value function has made it possible for the CSI to be used more effectively in solving the problem addressed. Satisfactory results were obtained in numeric simulations performed using the recommended approach.

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