Study of propagation of ultra-wide band electromagnetic pulse through a dispersive soil medium for the detection of buried unexploded ordnance

Vijayakumar, S and Thomas, M Joy (2017) Study of propagation of ultra-wide band electromagnetic pulse through a dispersive soil medium for the detection of buried unexploded ordnance. In: 13th International Conference on Electromagnetic Interference and Compatibility, INCEMIC 2015, 22-23 July 2015, Visakhapatnam, India, pp. 81-86.

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Abstract

Buried Unexploded ordnance (UXO) poses a serious humanitarian problem. At Present, there is no single equipment/system available to detect the unexploded buried ordnance (UXO), which fully satisfies the United Nations Mine Action Standard (UNMAS) requirements for safe removal and disposal of such ordnance. This paper presents the importance of the soil electrical characteristics and its electromagnetic model in the detection of buried UXO. Frequency domain analysis of EM wave propagation in the lossy dispersive soil media is carried out to study the detection range of the buried target. It is found that for the soil conductivity below 2 mS/m, effect of conductivity on EM wave attenuation in the moist soil can be neglected for the frequency of interest (3-5GHz). From the analysis, incident wave bandwidth between 3-5 GHz offers nominal ground penetrating imaging capability with nominal detection range in the soil media. Studies were carried out to find the importance of dispersive soil dielectric model against the constant permittivity model in the simulation of landmine detection system. Double Debye model is used to model the dielectric permittivity of the soil, Weighted Least Square (WLS) method is used to find the unknown parameters in the Double Debye model using the experimental results available in the literature. It is found that WLS model offers better performance for a wide band spectra dielectric model of the soil. One dimensional Finite Difference Time Domain method (FDTD) along with Piecewise Linear Recursive Convolution (PLRC) is used to simulate the system.

Item Type:	Conference Paper
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The Copyright of this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Electromagnetic(EM) wave; Pulsed EM Field; Ultra-wide Band (UWB); Unexploded Ordnance (UXO); Dielectric materials; Dispersion (waves); Electromagnetic pulse; Electromagnetic wave interference; Electromagnetic waves; Explosives; Finite difference time domain method; Frequency domain analysis; Landmine detection; Least squares approximations; Ordnance; Permittivity; Phonons; Piecewise linear techniques; Signal interference; Soils; Ultra-wideband (UWB); Wave propagation; Dielectric permittivities; Electrical characteristic; Electromagnetic modeling; EM field; Landmine detection systems; Piecewise linear recursive convolution; Unexploded ordnance; Weighted least square method; Time domain analysis
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	10 Jun 2022 05:17
Last Modified:	10 Jun 2022 05:17
URI:	https://eprints.iisc.ac.in/id/eprint/73260

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