Edge-based FEM solution of scattering from inhomogeneous and anisotropic objects

Weimin Sun, Constantine Balanis

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


This paper presents an application of the edge-based vector finite element method to scattering problems of anisotropic and inhomogeneous objects. Based on conventional FEM functional, a hybrid finite element-surface integral formulation is established by introducing permittivity and permeability tensors. The space domain is divided into interior and exterior regions by an imaginary surface conformal to the scatterer. Edge vector finite elements are used to model the anisotropic and inhomogeneous interior, and a surface integral equation is used to model the unbounded exterior. Compared to other hybrid techniques, the approach here retains the symmetry and sparsity of the FEM matrix and introduces only one type of unknown equivalent current in the moment matrix equation. To validate the theory, typical 2-D numerical results are first presented, which show excellent agreement with exact eigenmode expansion solutions or accurate MoM data.

Original languageEnglish (US)
Pages (from-to)627-632
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Issue number5
StatePublished - May 1994

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'Edge-based FEM solution of scattering from inhomogeneous and anisotropic objects'. Together they form a unique fingerprint.

Cite this