Scattering from a metallic object embedded near the randomly rough surface of a lossy dielectric

Two-dimensional electromagnetic scattering from a perfectly conducting target embedded near the randomly rough surface of an isotropic lossy dielectric is investigated. The randomly rough surface is illuminated by a finite width beam from an antenna in the free space above the surface, with off-normal incidence. Standard integral equation methods are applied and include all subsurface interactions between the object and rough surface. For a chosen embedded target, Monte Carlo simulations are performed for a selection of ensembles of rough surface types intended to be suggestive of natural ground. Far field scattering coefficient distributions and corresponding synthetic images suggest when the buried object should be discernible. Sensitivities are explored in terms of surface type, polarization of the incident field, depth and orientation of target, soil characteristics, incidence angle, and beamwidth. Many of the scattering features identified should also apply in 3D.

[1]  D. Jackson,et al.  The validity of the perturbation approximation for rough surface scattering using a Gaussian roughness spectrum , 1988 .

[2]  Matteo Pastorino,et al.  Numerical electromagnetic inverse-scattering solutions for two-dimensional infinite dielectric cylinders buried in a lossy half-space , 1993 .

[3]  A. G. Yarovoy,et al.  Two-dimensional scattering from an inhomogeneous dielectric cylinder embedded in a stratified medium: case of TM polarization , 1994 .

[4]  Sumit Roy,et al.  Imaging of a shallow subsurface objects: an experimental investigation , 1992, IEEE Trans. Geosci. Remote. Sens..

[5]  Xiao-Bang Xu,et al.  Current induced by TE excitation on a conducting cylinder located near the planar interface between two semi-infinite half-spaces , 1986 .

[6]  L. Peters,et al.  Ground penetrating radar as a subsurface environmental sensing tool , 1994, Proc. IEEE.

[7]  Chien-Ching Chiu,et al.  Electromagnetic inverse scattering of a conducting cylinder buried in a lossy half-space , 1992 .

[8]  Gerald W. Hohmann,et al.  ELECTROMAGNETIC SCATTERING BY CONDUCTORS IN THE EARTH NEAR A LINE SOURCE OF CURRENT , 1971 .

[9]  S. H. Ward,et al.  Electromagnetic scattering from cylinders of arbitrary cross-section in a conductive half-space , 1971 .

[10]  Hsueh-Jyh Li,et al.  Imaging of objects buried in a finite-sized dielectric background , 1994, IEEE Trans. Geosci. Remote. Sens..

[11]  P. G. Cottis,et al.  Scattering of Electromagnetic Waves From Cylindrical Inhomogeneities Embedded Inside a Lossy Medium With Sinusoidal Surface , 1992 .

[12]  A. Glisson,et al.  Current induced on a conducting cylinder located near the planar interface between two semi-infinite half-spaces , 1985 .

[13]  Allan J. Delaney,et al.  Dielectric properties of soils at UHF and microwave frequencies 36R. J. Geophys. Res. V79, N11, Apr. 1974, P1699–1708 , 1974 .

[14]  X.-B. Xu,et al.  A Hybrid Integral Equation Solution of Scattering of TE Excitation by Inhomogeneous Cylinders Near a Medium Interface , 1993 .

[15]  James R. Wait,et al.  Electromagnetic scattering from a buried cylindrical inhomogeneity inside a lossy earth , 1981 .

[16]  A.P. Freundorfer,et al.  A study on the scattering of radio waves from buried spherical targets using the step frequency radar , 1993, IEEE Trans. Geosci. Remote. Sens..