Cross-Well Radar. II: Comparison and Experimental Validation of Modeling Channel Transfer Function
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 135, Issue 9
Abstract
Close agreement between theory and experiment is critical for adequate understanding and implementation of the cross-well radar (otherwise known as cross-borehole ground penetrating radar) technique, mentioned in a previous paper by the authors. Comparison of experimental results to simulation using a half-space dyadic Green’s function in the frequency domain requires development of transfer functions to transform the experimental data into a compatible form. A channel transfer function (CTF) was developed to avoid having to model the transmitting and receiving characteristics of the antennas. The CTF considers electromagnetic wave propagation through the intervening media only (soil in this case) and hence corresponds to the simulation results that assume ideal sources and receivers. The CTF is based on assuming the transmitting antenna, soil, and receiving antenna as a cascade of three two-port microwave junctions between the input and output ports of the vector network analyzer used in the experimental measurements. Experimentally determined CTF results are then compared with computational model simulations for cases of relatively dry and saturated sandy soil backgrounds. The results demonstrate a reasonable agreement, supporting both the model and CTF formulation.
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References
Chew, W. C. (1995). Waves and fields in inhomogeneous media, IEEE, New York.
Collin, R. E. (1992). Foundations for microwave engineering. McGraw-Hill series in electrical engineering, radar and antennas, McGraw-Hill, New York.
Dasgupta, N., Geng, N., Dogaru, T., and Carin, L. (1999). “On the extended-Born technique for scattering from buried dielectric targets.” IEEE Trans. Antennas Propag., 47(11), 1739–1742.
Habashy, T. M., Groom, R. W., and Spies, B. (1993). “Beyond the Born and Rytov approximations: A nonlinear approach to electromagnetic scattering.” J. Geophys. Res., 98, 1759–1775.
Kurson, C. (2006). “Minimally invasive microwave measurements for modeling of a sandy soil properties.” MS thesis, Northeastern Univ., Boston.
Peterson, A. F. (1992). “Accuracy of 3D radiation boundary conditions for use with the vector Helmholtz equation.” IEEE Trans. Antennas Propag., 40, 351–355
Rappaport, C. M., Wu, S., and Winton, S. (1999). “FDTD wave propagation in dispersive soil using a single pole conductivity model.” IEEE Trans. Magn., 35, 1542–1545.
Tai, C. (1971). Dyadic green functions in electromagnetic theory, International Textbook, Scranton, Pa.
Tsang, L., Kong, J. A., and Shin, R. T. (1985). Theory of microwave remote sensing, Wiley, New York.
von Hippel, A. R. (1953). Dielectric materials and applications, Wiley, New York.
Weedon, W., and Rappaport, C. M. (1997). “A general method for FDTD modeling of wave propagation in arbitrary frequency-dispersive media.” IEEE Trans. Antennas Propag., 45, 401–410.
Zhan, H., Farid, A. M., Alshawabkeh, A. N., Raemer, H., and Rappaport, C. M. (2007). “Validated half-space Green’s function formulation for Born approximation for cross-well radar sensing of contaminants.” IEEE Trans. Geosci. Remote Sens., 45(8), 2423–2428.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 135 • Issue 9 • September 2009
Pages: 1219 - 1227
Copyright
© 2009 ASCE.
History
Received: Nov 5, 2007
Accepted: Jan 28, 2009
Published online: Mar 3, 2009
Published in print: Sep 2009
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