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Constant Speed Parametrization Mapping of Curved Boundary Surfaces in Higher-Order Moment-Method Electromagnetic Modeling

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4 Author(s)
Ilic, M.M. ; Sch. of Electr. Eng., Univ. of Belgrade, Belgrade, Serbia ; Savic, S.V. ; Ilic, A.Z. ; Notaros, B.M.

A constant speed parametrization (CSP) mapping of boundary surfaces is proposed for moment-method analysis of antennas and scatterers, along with its approximation using large higher-order Lagrange-type curved quadrilateral patches. The importance of the proper placement of interpolation nodes that ensures minimum mapped parametric space distortion (arc-length parametrization) is explained and demonstrated on simple examples. The CSP mapping results in on average five times lower radar cross section (RCS) error for a spherical scatterer than with the ray casting (central projection) parametrization mapping. The extension of the CSP concept to arbitrary surfaces is illustrated in modeling of the double-ogive target.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:10 )