TY - JOUR
T1 - Scattering analysis of a large body with deep cavities
AU - Liu, Jian
AU - Jin, Jian Ming
N1 - Funding Information:
Manuscript received January 4, 2002; revised May 3, 2002. This work was supported by a grant from ONR under Contract N00014-01-1-0210. The authors are with the Center for Computational Electromagnetics, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801-2991 USA (e-mail: [email protected]). Digital Object Identifier 10.1109/TAP.2003.812280
PY - 2003/6
Y1 - 2003/6
N2 - A numerical scheme is presented for simulating electromagnetic scattering from a large and arbitrarily shaped body, coated with inhomogeneous composite materials, with large and deep cavities. This numerical scheme employs the higher order vector finite-element method (FEM) to discretize the fields inside the cavities and coatings and the higher order boundary integral (BI) method to terminate the FEM computational domain. A highly efficient special solver is designed to eliminate the unknowns inside the cavities, which yields a computed relation (CR) matrix over the cavity's aperture between the tangential electric and magnetic fields. This CR matrix is then combined with the finite element-boundary integral (FE-BI) matrix equation to form a complete linear system for the discrete fields everywhere in the computational domain. The resulting system is solved iteratively using a novel preconditioner derived by replacing the BI with a corresponding absorbing boundary condition (ABC).
AB - A numerical scheme is presented for simulating electromagnetic scattering from a large and arbitrarily shaped body, coated with inhomogeneous composite materials, with large and deep cavities. This numerical scheme employs the higher order vector finite-element method (FEM) to discretize the fields inside the cavities and coatings and the higher order boundary integral (BI) method to terminate the FEM computational domain. A highly efficient special solver is designed to eliminate the unknowns inside the cavities, which yields a computed relation (CR) matrix over the cavity's aperture between the tangential electric and magnetic fields. This CR matrix is then combined with the finite element-boundary integral (FE-BI) matrix equation to form a complete linear system for the discrete fields everywhere in the computational domain. The resulting system is solved iteratively using a novel preconditioner derived by replacing the BI with a corresponding absorbing boundary condition (ABC).
KW - Boundary integral equations
KW - Electromagnetic scattering
KW - Finite-element methods (FEMs)
KW - Numerical analysis
KW - Radar cross section (RCS)
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U2 - 10.1109/TAP.2003.812280
DO - 10.1109/TAP.2003.812280
M3 - Article
AN - SCOPUS:0037707288
SN - 0018-926X
VL - 51
SP - 1157
EP - 1167
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 6
ER -