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A hybrid finite element method for 3-D scattering using nodal and edge elements

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2 Author(s)
Boyse, W.E. ; Lockheed Palo Alto Res. Lab., CA, USA ; Seidl, A.A.

A hybrid finite element method for three-dimensional scattering is presented and numerical examples shown. This approach, which couples finite element discretization with the method of moments, is particularly well suited for monostatic radar cross section calculations. The method is based on a scalar and vector potential formulation of Maxwell's equations, the use of nodal elements, and a highly efficient body of revolution implementation of the method of moments. Combined nodal and edge elements are employed to accurately model fields around corners and edges. A curvature-based sampling criterion is derived and shown to ensure accurate answers for highly curved scatterers. Numerical results and Cray computer timings are compared with published results for an edge element code using radiation boundary conditions

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:42 ,  Issue: 10 )

Date of Publication:

Oct 1994

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