Radio-wave tomography of inhomogeneous media

Abstract

Results of experimental investigations on radar sensing of inhomogeneous media and objects with the use of both superbroadband (from 0.5 to 17 GHz) multifrequency scanning and supershort nanosecond and subnanosecond radar pulses are considered. It is demonstrated that addition of angular and spatial scanning and subsequent synthesis of a large aperture allow a three-dimensional tomography of low-contrast inhomogeneities to be realized with a spatial resolution of about 1 cm. Examples are presented that confirm a high efficiency of the method for contactless tomography of the forest structure and detection and visualization of infantry mines below a rough sand surface.

Radio-wave tomography of hidden objects for safety systems

“…, E x t with complex-conjugate AFS [12,13]: Figure 11b illustrates the image of the function ( , ) W x y so obtained. It can be seen that all three reflectors are distinguished sufficiently well where they were set.…”

“…Many methods of solving inverse problem of ground penetrating radar with SAR have been developed [3][4][5][6][7][8][9][10][11][12][13][14]. In most cases, the scattered field is measured with a system of omnidirectional transceiving antennas displaced successively in the horizontal plane at a fixed height above the ground surface.…”