Progress In Electromagnetics Research
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By D. Uduwawala, M. Norgren, P. Fuks, and A. Gunawardena

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The finite difference time domain (FDTD) method is used to analyze a practical ground penetrating radar (GPR) antenna system operating above lossy and dispersive grounds. The antenna is of the resistor-loaded bow-tie type and the analysis is made for two known soil types, namely Puerto Rico and San Antonio clay loams. The soil is modeled by a two term Debye model with a static conductivity and it is matched to the mentioned soils by using curve fitting. The FDTD scheme is implemented by the auxiliary differential equation (ADE) method together with the uniaxial perfectly matched layer (UPML) absorbing boundary conditions (ABC). In order to model a real GPR environment, ground surface roughness and soil inhomogeneities are also included. The effect of soil properties on the GPR response and antenna input impedance is presented. Thus the ability to detect buried metal and plastic pipes is investigated.

Citation: (See works that cites this article)
D. Uduwawala, M. Norgren, P. Fuks, and A. Gunawardena, "A Complete FDTD Simulation of a Real GPR Antenna System Operating Above Lossy and Dispersive Grounds," Progress In Electromagnetics Research, Vol. 50, 209-229, 2005.

1. Yee, K. S., "Numerical solution of initial boundary value problems involving Maxwells equations in isotropic media," IEEE Trans. Antennas Propagat., Vol. AP-14, No. 5, 302-307, 1966.

2. Taflove, A., Computational Electrodynamics, Artech House, 1995.

3. Taflove, A., Advances in Computational Electrodynamics, Artech House, 1998.

4. Hipp, J. E., "Soil electromagnetic parameters as functions of frequency, density, and soil moisture," Proc. IEEE, Vol. 62, No. 1, 98-103, 1974.

5. Gurel, L. and U. Oguz, "Simulations of ground penetrating radars over lossy and heterogeneous grounds," IEEE Trans. Geosci. Remote Sensing, Vol. 39, No. 6, 1190-1197, 2001.

6. Oguz, U. and L. Gurel, "Frequency responses of ground penetrating radars operating over highly lossy grounds," IEEE Trans. Geosci. Remote Sensing, Vol. 40, No. 6, 1385-1394, 2002.

7. Teixeira, F. L., W. C. Chew, M. Straka, M. L. Oristaglio, and T. Wang, "Finite-difference time domain simulation of ground penetrating radar on dispersive, Inhomogeneous, and conductive soils," IEEE Trans. Geosci. Remote Sensing, Vol. 36, No. 11, 1928-1937, 1998.

8. Bourgeois, J. M. and G. S. Smith, "A fully three-dimensional simulation of a ground-penetrating radar: FDTD theory compared with experiment," IEEE Trans. Geosci. Remote Sensing, Vol. 34, No. 1, 36-44, 1996.

9. Kashiwa, T. and I. Fukai, "A treatment by FDTD method of dispersive characteristics associated with electronic polarization," Microwave and Optics Technology Letters, Vol. 3, 203-205, 1990.

10. Joseph, R. M., S. C. Hagness, and A. Taflove, "Direct time integration of Maxwell's equations in linear dispersive media with absorption for scattering and propagation of femtosecond electromagnetic pulse," Optics Letters, Vol. 16, 1412-1414, 1991.

11. Sacks, Z. S., D. M. Kingsland, R. Lee, and J. F. Lee, "A perfectly matched anisotropic absorber for use as an absorbing boundary condition," IEEE Trans. Antennas Propagat., Vol. 43, No. 12, 1460-1463, 1995.

12. Gedney, S. D., "An anisotropic perfectly matched layer-absorbing medium for the truncation of FDTD lattices," IEEE Trans. Antennas Propagat., Vol. 44, No. 12, 1630-1639, 1996.

13. Gedney, S. D., "An anisotropic PML absorbing media for FDTD simulation of field in lossy dispersive media," Electromagnetics, Vol. 16, 399-415, 1996.

14. Maloney, J. G., K. L. Shlager, and G. S. smith, "A simple FDTD model for transient excitation of antennas by transmission lines," IEEE Trans. Antennas Propagat., Vol. 42, No. 2, 289-292, 1994.

15. Uduwawala, D., M. Norgren, P. Fuks, and A. Gunawardena, "A deep parametric study of resistor-loaded bow-tie antennas for ground penetrating radar applications using FDTD," IEEE Trans. Geosci. Remote Sensing, Vol. 42, No. 4, 732-742, 2004.

16. Taflove, A. and M. E. Brodwin, "Numerical solution of steady-state electromagnetic scattering problems using the time- dependent Maxwells equations," IEEE Trans. Microwave Theory Tech., Vol. MTT-23, No. 8, 623-630, 1975.

17. Jurgens, T. G., A. Taflove, K. Umashankar, and T. G. Moore, "Finite-difference time-domain modeling of curved surfaces," IEEE Trans. Antennas Propagat., Vol. 40, No. 4, 357-366, 1992.

18. Daniels, D. J., D. J. Gunton, and H. F. Scott, "Introduction to subsurface radar," IEEE Proc., Vol. 135, No. 4, 278-320, 1988.

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