Estimating the permittivity of soil using common-mode currents on a coaxial transmission line

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Abstract

Knowing the value of the permittivity of the soil is important when using ground-penetrating radar (GPR) systems in outdoor conditions. Soil permittivity can be estimated by a variety of techniques, from destructive methods that require soil sampling though to non-contact methods using the GPR system. This paper introduces a novel method for estimating the permittivity of soils, based on measuring the travel time of common-mode currents on coaxial transmission lines such as semi-rigid coax cables. The common-mode current concept was validated using finite-difference time-domain simulations of dielectric half-spaces. Experimental measurements were taken of air and de-ionised water as reference materials. The estimated value of the permittivity of these materials was within 3% of the expected value.

Bibliographical metadata

Original languageEnglish
Publication statusPublished - 1 Jan 2019
Event10th International Workshop on Advanced Ground Penetrating Radar, Held at Near Surface Geoscience Conference and Exhibition 2019, NSG 2019 - The Hague, Netherlands
Event duration: 8 Sep 201912 Sep 2019

Conference

Conference10th International Workshop on Advanced Ground Penetrating Radar, Held at Near Surface Geoscience Conference and Exhibition 2019, NSG 2019
CountryNetherlands
CityThe Hague
Period8/09/1912/09/19

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