The interior resonance problem that can occur when using a hybrid finite-element method/method of moments (FEM/MoM) method to model electromagnetic scattering problems is investigated. Calculations of the bistatic radar cross section of a coated dielectric sphere are presented using different formulations, solution approaches, and solvers. The solutions using the electric-field integral equation have significant errors near an interior resonance frequency. When the combined-field integral equation is employed, satisfactory solutions can be obtained that do not depend on the particular solution approach or solver.


Electrical and Computer Engineering

Keywords and Phrases

3D Hybrid FEM/MoM Method; CFIE; EFIE; MFIE; Bistatic Radar Cross Section; Coated Dielectric Sphere; Combined-Field Integral Equation; Dielectric Bodies; Electric Field Integral Equations; Electric-Field Integral Equation; Electromagnetic Scattering Problems; Electromagnetic Wave Scattering; Finite Element Analysis; Hybrid Finite-Element Method/Method of Moments; Interior Resonance Frequency; Magnetic Field Integral Equations; Magnetic-Field Integral Equation; Method of Moments; Numerical Investigation; Resonance

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2003 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2003