Naslov
A boundary integral method for numerical computation of radar cross section of 3D targets using hybrid BEM/FEM with edge elements

Autori
Dodig, Hrvoje

Izvornik
Journal of computational physics (0021-9991) 348 (2017); 790-802

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Radar cross section ; Boundary element method ; Finite element method ; Hybrid BEM/FEM method ; Edge elements ; Computational electromagnetism ; Interior resonance problem

Sažetak
This contribution presents the boundary integral formulation for numerical computation of time-harmonic radar cross section for 3D targets. Method relies on hybrid edge element BEM/FEM to compute near field edge element coefficients that are associated with near electric and magnetic fields at the boundary of the computational domain. Special boundary integral formulation is presented that computes radar cross section directly from these edge element coefficients. Consequently, there is no need for near-to-far field transformation (NTFFT) which is common step in RCS computations. By the end of the paper it is demonstrated that the formulation yields accurate results for canonical models such as spheres, cubes, cones and pyramids. Method has demonstrated accuracy even in the case of dielectrically coated PEC sphere at interior resonance frequency which is common problem for computational electromagnetic codes.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Elektrotehnika

POVEZANOST RADA