1887

Abstract

Summary

Understanding how energy is transmitted and received by Ground Penetrating Radar antennas is crucial to many areas of the industry: antenna design, data processing and inversion algorithms, usage of antennas in GPR surveys, and interpretation of GPR responses. The radiation characteristics of antennas are usually investigated by studying the radiation patterns and directivity. For GPR antennas it is important to study these characteristics when the antenna is in environments that would typically be encountered in GPR surveys. Physically measuring antenna radiation patterns in such environments presents many practical difficulties, and there have been very limited numerical studies that combine real GPR antenna models with realistic environments. This paper presents a numerical investigation of the radiation characteristics of a high-frequency GPR antenna in a realistic environment. An advanced modelling toolset has been developed that enables detailed models of GPR antennas to be used with realistic heterogeneous soil models. In this initial investigation small differences in directivity have been observed between a lossless dielectric environment and a more realistic environment featuring a heterogeneous soil model. These findings are part of an on-going full parametric study incorporating a range of different soils, fractal weightings and also the inclusion of rough surface modelling.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201414187
2015-10-05
2024-07-17
Loading full text...

Full text loading...

References

  1. Diamanti, N., and Annan, A. P.
    [2013] Characterizing the energy distribution around GPR antennas. Journal of Applied Geophysics, 99, 83–90.
    [Google Scholar]
  2. Dobson, M. C., Ulaby, F. T., Hallikainen, M. T., and El-Rayes, M. A.
    [1985] Microwave dielectric behavior of wet soil-part ii: Dielectric mixing models Geoscience and Remote Sensing, IEEE Transactions on, 1, 35–46.
    [Google Scholar]
  3. Galagedara, L., Redman, J., Parkin, G., Annan, A., and Endres, A.
    [2005] Numerical modeling of GPR to determine the direct ground wave sampling depth. Vadose Zone Journal, 4, 1096–1106.
    [Google Scholar]
  4. Giannakis, I., and Giannopoulos, A.
    [2014] A novel piecewise linear recursive convolution approach for dispersive media using the finite-difference time-domain method Antennas and Propagation, IEEE Transactions on, 62(5), 2669–2678.
    [Google Scholar]
  5. Giannopoulos, A.
    [2005] Modelling Ground Penetrating Radar by GprMaxConstruction and Building materials, 19(10), 755–762.
    [Google Scholar]
  6. Jeannin, M., Garambois, S., Gregoire, C., and Jongmans, D.
    [2006] Multiconfiguration GPR measurements for geometric fracture characterization in limestone cliffs (Alps)Geophysics, 71, B85.
    [Google Scholar]
  7. Lopera, O., and Milisavljevic, N.
    [2007] Prediction of the effects of soil and target properties on the antipersonnel landmine detection performance of ground-penetrating radar: A Colombian case study. Journal of Applied Geophysics, 63(1), 13–23.
    [Google Scholar]
  8. Soldovieri, F., Hugenschmidt, J., Persico, R., and Leone, G.
    [2007] A linear inverse scattering algorithm for realistic GPR applications. Near Surface Geophysics, 5(1), 29–42.
    [Google Scholar]
  9. Turcotte, D. L.
    [1987] A fractal interpretation of topography and geoid spectra on the Earth, Moon, Venus and Mars. Journal of Geophysics, 94(B4), E597–E601.
    [Google Scholar]
  10. Warren, C., and Giannopoulos, A.
    [2011] Creating FDTD models of commercial GPR antennas using Taguchi’s optimisation method. Geophysics, 76(37), G37–G47.
    [Google Scholar]
  11. [2015] Experimental and modelled performance of a Ground Penetrating Radar antenna in lossy dielectrics. Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of, (in press)
    [Google Scholar]
/content/papers/10.3997/2214-4609.201414187
Loading
/content/papers/10.3997/2214-4609.201414187
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error