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Three-dimensional electromagnetic scattering from inhomogeneous objects by the hybrid moment and finite element method

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1 Author(s)
X. Yuan ; Thayer Sch. of Eng., Dartmouth Coll., Hanover, NH, USA

The hybrid moment and finite element methods are used to obtain 3-D scattering and/or absorption from inhomogeneous, arbitrarily shaped objects. The surface of the object is approximated by triangles and the volume of the object is approximated by tetrahedrons. The electrical parameters are assumed constant in each tetrahedron. The Galerkin testing procedure is used. To avoid contaminations of spurious mode, a divergenceless vector basis function is used in finite elements. The calculated internal field and scattered field for a homogeneous sphere, a layered sphere, and a lossy prolate spheroid are compared with Mie series solutions and other numerical techniques. The accuracy and rate of convergence of the solution are discussed.<>

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:38 ,  Issue: 8 )