Enhancing the Detection Probability of Buried Objects by Phase Analysis of a SFCW-GPR

The difficulty of an accurate and reliable detection of land mines requires a detailed analysis of ground penetrating radar data. This includes the power and phase of the received stepped frequency continuous wave signal, which both shows a unique pattern. In the B-Scan a typical hyperbola is present with an increased or decreased contrast of the reflected power or a constant phase along this hyperbola resulting in a circular pattern in the corresponding C-Scan. Thereby the phase along such a circular shape is constant, which is unique for the anti personnel mine simulants used in context of this paper. The measurements conducted also exhibit the importance of the measurement grid size with respect to the object size.