Ultra-wideband, short-pulse ground-penetrating radar: simulation and measurement

Abstract

Abstract-Ultra-wideband (UWB), short-pulse (SP) radar is investigated theoretically and experimentally for the detection and identification of targets buried in and placed atop soil. The calculations are performed using a rigorous, three-dimensional (3-D) Method of Moments algorithm for perfectly conducting bodies of revolution. Particular targets investigated theoretically include anti-personnel mines, anti-tank mines, and a 55-gallon drum, for which we model the time-domain scattered fields and the buried-target late-time resonant frequencies. With regard to the latter, the computed resonant frequencies are utilized to assess the feasibility of resonance-based buried-target identification for this class of targets. The measurements are performed using a novel UWB, SP synthetic aperture radar (SAR) implemented on a mobile boom. Experimental and theoretical results are compared.

Fast multipole method for scattering from an arbitrary PEC target above or buried in a lossy half space

“…4(a), situated above a lossy half space. The soil is characterized as Yuma soil, with 10% water content [20], [22]. As depicted in Fig.…”

“…The importance of the FMM becomes even more evident as the size of the trihedral increases. For example, ultra-wideband synthetic aperture radar (SAR) systems operate over frequencies from 50 to 1200 MHz [20], [22], for which very large trihedrals are required, to account for the lowest frequencies. The efficacy of applying the FMM to this problem has been examined in detail, in a separate paper [37].…”

“…8, buried in Yuma soil with 5% water content [20], [22], the target symmetry axis in the -plane. The plane wave is incident at (in the -plane) and , and the bistatic scattered fields are observed at angles and , with a 500-MHz operating frequency.…”

“…There are many applications for which the free-space model or a quasi-planar approximation are inappropriate. For example, there has been significant interest in radar sensing of buried targets, such as mines [20], unexploded ordnance (UXO) [21], drums [22], etc. In this paper we concentrate on the two-level FMM, with the goal of extending it to the case of a target in the vicinity of a lossy half space.…”

Several new ultra-wideband antenna systems for radio telescopes and industry sensor imaging process

“…Extensive studies have contributed to utilizing UWB transient scattering for automated target recognition and imaging purposes [7], [8], where a UWB synthetic aperture radar (SAR) imaging algorithm was presented and applied for subsurface object imaging. One limitation of the algorithm is that an artefact in the imaging procedure causes ambiguity.…”