Propagation model, optimal geometry and receiver design for RF Geotomography

A novel RF Geotomography system is introduced. RF Geotomography may become a powerful technique to detect tunnels and underground cavities. A RF Geotomography system requires a set of transmitters and receivers deployed above the ground according to a known geometry. Using the concept of diffraction tomography, an image of the ground is constructed, thus providing the capability to easily detect tunnels and cavities below the ground. This paper addresses the issues of 1) Propagation model specifically designed for RF geotomography 2) Appropriate frequency ranges for detection of tunnels and cavities 3) Design procedures for receivers. 4) Investigation on the optimal geometry to maximize the resolution and minimize the displaced units.