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Abstract-This paper deals with the design and numerical analysis of a reconfigurable antenna implemented according to the total geometry morphing approach. The reconfigurable antenna is designed so to resemble a reference bowtie antenna, suitable for a stepped frequency Ground Penetrating Radar (GPR) applications, with geometry variable in order to work in different operative conditions. In particular, the good agreement between the reference antenna and the reconfigurable one is tested within the work frequency band 0.3-1 GHz for both the free-space and half-space geometry. Finally, a trial of the reconfigurability of the proposed solution is shown for operative conditions with antenna in contact with different dielectric media.

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We have developed a new strategy for indirect measurement of the dielectric permittivity of the soil using ground penetrating radar (GPR) data. In particular, the GPR data are provided as field scattered by a pipe buried in the soil; the scattered field data is collected at the air–soil interface and under a multimonostatic configuration (B‐scan). The strategy is based on the use of a microwave tomographic approach that achieves more robust results with respect to the simple calculation of the round‐trip time of the signal. Preliminary results are presented with synthetic data, achieved by means of a finite‐difference time‐domain code, for both the simple case of a pipe buried in a homogeneous soil and the more complicated case of multiple pipes in a layered medium.

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