Finite-element boundary-integral analysis of electromagnetic scattering by a buried dielectric object

Abstract

The standard hybrid finite‐element boundary‐integral (FE–BI) technique has been extended to deal with the problem of electromagnetic scattering from buried objects. The presence of the ground–air interface is taken into account by using the half‐space Green's function, thus reducing the number of unknowns necessary to numerically solve the problem. The problem has been conveniently formulated by using the field transmitted into the half space containing the object as an incident field. ©2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 24: 422–426, 2000.

A Numerical Method for Electromagnetic Scattering by 3-D Dielectric Objects Buried Under 2-D Locally Rough Surfaces

“…However, it requires the discretization of the entire solution domain that causes very high simulation time. The similar problem is solved by a hybrid method with finite element method (FEM) which has the capability of more accurate discretization of solution domain in [3], [4]. Another common approach to direct scattering problem is to use an integral equation formulation of scattered field involving the Green's function.…”

FE-BI with UV Method for Scattering Analysis from Objects above a Lossy Half Space

“…The numerical integration of SI is time consuming since the integrand is both highly oscillating and slowly decaying. Therefore, the discrete complex image method (DCIM) [8][9][10] is employed to overcome this difficulty.…”

“…FMM [10][11][12][13] can be extended for general targets in the presence of a lossy half space [8][9] with real-image method, which determines the large minimum group size of the FMM and leads to a low efficiency. In this paper, the rank-based methods, the multilevel UV method [14][15][16] is applied to overcome the above difficulty for the approximation to the half-space Green's function.…”