Microwave holographic imaging of underground objects

Propagation of electromagnetic waves through a system of randomly placed cylinders: the partial scattering wave resonance

“…The practical tasks of discerning the nature of random media by analysing the radiation reflected from and transmitted through them, and locating and imaging objects buried within them, requires a comprehensive understanding of the processes associated with the propagation of electromagnetic waves in such systems [7][8][9][10]. In particular, the scattering of the radiation from such structures can be both beneficial and detrimental to the accomplishment of the objectives.…”

An Inverse Scattering Approach Based on A Neural Network Technique for the Detection of Dielectric Cylinders Buried in a Lossy Half-Space

“…In the past years, different approaches, oriented both to a global reconstruction of the internal constitutive parameters [1][2][3][4][5][6][7] and to the localization and reconstruction of the external boundary [8][9][10][11], have been proposed for the imaging of an object buried in a half-space. In particular, great attention has been devoted to the analysis of cylindrical targets.…”

FMCW radar for hidden object detection

“…This paper is based on research that has continued over a number of years. A number of workers have developed radars for locating underground pipes and for geophysical prospecting [1][2][3][4]. The problem is characterised by the need for a radar with a very large dynamic range and high sensitivity.…”

“…A version of the FMCW radar was developed for this purpose [5], but as will become clear later in this paper an FMCW radar is not well-suited to these applications, where a relatively low frequency signal has to be used to achieve adequate penetration in lossy soil. Consequently, most of the radars that have been developed for buried-object detection have been pulse radars [2,3,6] or have used holographic imaging [4,7]. There are, however, a range of applications where the detection is required of an object that is hidden only a very short distance in front of the radar.…”