3-D scattering from a PEC target buried beneath a dielectric rough surface: an efficient PILE-ACA algorithm for solving a hybrid KA-EFIE formulation - Université de Rennes Accéder directement au contenu
Article Dans Une Revue IEEE Transactions on Antennas and Propagation Année : 2015

3-D scattering from a PEC target buried beneath a dielectric rough surface: an efficient PILE-ACA algorithm for solving a hybrid KA-EFIE formulation

Résumé

In this paper, an efficient hybrid KA-EFIE formulationis deployed to analyse the ElectroMagnetic (EM) scatteringfrom a three-dimensional (3-D) Perfectly Electric Conducting(PEC) object buried beneath a two-dimensional (2-D) dielectricrough surface. In this approach, the electric and magnetic currentdensities on the rough surface are analytically obtained throughthe current-based Kirchhoff Approximation (KA) whereas theelectric current density on the buried object is rigorously determinedby solving the Electric Field Integral Equation (EFIE) usingthe Galerkin’s Method of Moments (MoM) with Rao-Wilton-Glisson (RWG) basis functions. The KA-EFIE matrix systemis then efficiently solved by the iterative PILE (Propagation-Inside-Layer-Expansion) method combined with the algebraicAdaptive Cross Approximation (ACA). The current densitieson the dielectric rough surface are thereafter used to handlethe bistatic Normalized Radar Cross Section (NRCS) patterns.The proposed hybrid approach allows a significant reduction incomputation time and memory requirements compared to the rigorousPMCHW(Poggio-Miller-Chang-Harrington-Wu)-EFIE formulationwhich requires solving a large MoM matrix equation.Moreover, the hybridization of the ACA algorithm with the PILEmethod, improves further the computational cost thanks to therank-deficient propriety of the coupling matrices. To validatethe hybrid approach, we compare its results with those of therigorous PMCHW-EFIE approach.
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Dates et versions

hal-01195825 , version 1 (08-09-2015)

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Sami Bellez, Christophe Bourlier, Gildas Kubicke. 3-D scattering from a PEC target buried beneath a dielectric rough surface: an efficient PILE-ACA algorithm for solving a hybrid KA-EFIE formulation. IEEE Transactions on Antennas and Propagation, 2015, 63 (11), pp.5003-5014. ⟨10.1109/TAP.2015.2480123⟩. ⟨hal-01195825⟩
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