Abstract:

In order to calculate quickly the composite electromagnetic scattering from buried objects below a large dimensional rough surface, the E-PILE+BMIA/CAG method is presented by combining the extended propagation-inside-layer expansion (PILE) and banded matrix iterative approach canonical grid (BMIA/CAG). The actual ground surface is simulated by a random surface with Gauss spectrum, and the tapered incident wave is chosen to reduce the truncation error. The composite scattering from an infinite length 2-D cylinder buried under the 1-D randomly rough surface with lossy media is calculated by using E-PILE+BMIA/CAG. The validity and convergence of this method are verified by comparing the result with that of the existing method. The coupling effect between the surface and the object and the roughness is studied. Finally, the scattering pattern of buried targets below a rough surface is studied. The numerical results provide a guide in the application of the ground penetrating radar.