Abstract:
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Recent attention has been devoted to the development
of nonconforming method-of-moment (MoM) implementations of
the Electric-Field Integral Equation (EFIE), which provide
current solutions with no continuity constraints between
neighboring facets. These schemes rely on the testing of the fields
over small volumetric domains attached to the surface
triangulation, inside the body under analysis. In the scattering
analysis of closed conductors with edges and corners, improved
accuracy is observed when compared with the conventional
RWG-discretization of the EFIE. Similarly, in these cases, the
Galerkin MoM-implementation of the Magnetic-Field Integral
Equation (MFIE) with the monopolar-RWG basis functions, a
low-order example of nonconforming set, shows improved
accuracy with respect to the poorly accurate RWG-discretization
of the MFIE. In this paper, we show RCS-results for the
monopolar-RWG MoM-implementation of the Combined-Field
Integral Equation (CFIE), which arises from the linear
combination of the EFIE and the MFIE. As expected, it offers
improved accuracy for the sharp-edged conductor tested with
respect to the conventional RWG-discretization of the CFIE. |