Title :
A hybrid finite element-boundary element method and its application to inverse scattering
Author :
Lee, Taek-Kyung ; Lee, Soo-Young ; Ra, Jung-Woong
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
Abstract :
A hybrid finite-element-boundary-element (FE-BE) formulation is applied to direct and inverse electromagnetic scattering from inhomogeneous scatterers. FEM is used in the inhomogeneous region, while BEM is applied to the external unbounded region. This hybrid method has the merits of both methods, i.e. the flexibility and sparse matrix of FEM for complicated inhomogeneous scatterers, and the easy handling with smaller nodes of BEM for unbounded regions. The numerical efficiency of this hybrid method makes it possible to apply this scheme to inverse scattering with least-square-error iteration. The accuracy of this formulation is checked by comparing the calculated results with an analytic solution for scattering from three-layer concentric infinite cylinders.<>
Keywords :
boundary-value problems; electromagnetic wave scattering; field emission electron microscopy; electromagnetic scattering; hybrid finite element-boundary element method; inhomogeneous scatterers; inverse scattering; least-square-error iteration; numerical efficiency; sparse matrix; three-layer concentric infinite cylinders; unbounded region; Application software; Boundary conditions; Dielectrics; Electromagnetic scattering; Finite element methods; Integral equations; Inverse problems; Message-oriented middleware; Nonuniform electric fields; Sparse matrices;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.135039
