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Higher order nodal basis functions for representing equivalent surface currents on antennas and scatterers are introduced. The performance of the nodal basis is evaluated by comparing two existing higher order edge bases, using the magnetic field integral equation (MFIE) formulation for scattering by a perfect electric conductor (PEC) sphere and icosahedron as test problems. Both nodal and edge bases are implemented on rational Bezier patches, giving an exact representation of the surfaces, free from geometrical error. The accuracy of the numerical solutions obtained with the three different bases for both the surface current and the radar cross section (RCS) are compared, and it is shown that in general the nodal bases give better accuracy than the edge bases for equal computational cost.
Published in:
Antennas and Propagation, IEEE Transactions on
(Volume:56
,
Issue:
6
)
Date of Publication: June 2008
- Page(s):
- 1812 - 1818
- ISSN :
- 0018-926X
- INSPEC Accession Number:
- 10035018
- Digital Object Identifier :
- 10.1109/TAP.2008.922694
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 June 2008
- Issue Date :
- June 2008
- Sponsored by :
- IEEE Antennas and Propagation Society
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