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Terahertz/Millimeter Wave Characterizations of Soils for Mine Detection: Transmission and Scattering

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Abstract

The detection of anti-personnel mines depends on the soil transmission and scattering at a given wavelength. Transmission spectra were measured over the range 90–4200 GHz for 19 soil samples that span a number of soil orders that have extensive worldwide distribution using a vector network analyzer (90–140 GHz) and a Fourier spectrometer (120–4200 GHz). Transmission drops to nearly zero for wavelengths shorter than the characteristic particle size of the sample as a consequence of scattering. This interpretation is supported by a fit to a standard scattering model with physically reasonable fitting parameters. Transmission spectra were also measured for various liquids (90–600 GHz) for possible index matching. These liquids were mixed with the soil sample and were found to reduce scattering and increase transmission through the soil at higher frequencies. This work is relevant to mine detection using terahertz and millimeter wave radiation for high resolution images through the soil.

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Acknowledgment

This work was supported by a research contract between Northrop Grumman Corporation and Florida Photonics Center of Excellence. The authors would like to thank Ian McMichael of the US Army Night Vision Labs and Phil Jardine and Melanie Stewart from Oak Ridge National Labs for supplying some of the soil samples tested in this study.

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Authors and Affiliations

  1. Department of Physics, University of Central Florida, Orlando, FL, 32816, USA

    Todd W. Du Bosq & Robert E. Peale

  2. College of Optics and Photonics, University of Central Florida, Orlando, FL, 32816, USA

    Glenn D. Boreman

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  1. Todd W. Du Bosq
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  2. Robert E. Peale
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  3. Glenn D. Boreman
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Correspondence to Glenn D. Boreman.

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Du Bosq, T.W., Peale, R.E. & Boreman, G.D. Terahertz/Millimeter Wave Characterizations of Soils for Mine Detection: Transmission and Scattering. Int J Infrared Milli Waves 29, 769–781 (2008). https://doi.org/10.1007/s10762-008-9376-3

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  • DOI: https://doi.org/10.1007/s10762-008-9376-3

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