Title :
Numerical Analysis of Scattering by Dielectric Random Rough Surfaces Using Modified SMCG Scheme and Curvilinear RWG Basis Functions
Author :
Huang, S.W. ; Zhang, G.H. ; Xia, M.Y. ; Chan, C.H.
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Peking Univ., Beijing, China
Abstract :
An augmented sparse-matrix canonical-grid (SMCG) approach for numerical analysis of scattering by dielectric random rough surfaces is developed. It is an extension of the previous modified SMCG scheme for perfect-electric-conducting (PEC) surfaces to dielectric cases, and is enhanced by adopting curved triangulation modeling. By using the curved modeling with curvilinear Rao-Wilton-Glisson basis functions (CRWG bases), the number of unknowns can be reduced substantially to extract results of the same accuracy, compared with using the planar triangular discretization with planar RWG bases. Numerical results for Gaussian and ocean-like dielectric rough surfaces are provided to confirm the validity and efficacy of the proposed method.
Keywords :
Gaussian processes; conducting bodies; dielectric bodies; electromagnetic wave scattering; rough surfaces; sparse matrices; Gaussian surface; PEC surface; SMCG scheme; augmented sparse-matrix canonical-grid approach; curved triangulation modeling; curvilinear RWG basis function; curvilinear Rao-Wilton-Glisson basis function; dielectric random rough surface; electromagnetic wave scattering; numerical analysis; perfect-electric-conducting surface; planar RWG bases; planar triangular discretization; Chebyshev approximation; Concurrent computing; Dielectrics; Electromagnetic scattering; Flexible printed circuits; Numerical analysis; Rough surfaces; Sea surface; Surface roughness; Taylor series; Transmission line matrix methods; Dielectric rough surface scattering; curvilinear Rao–Wilton–Glisson (CRWG) basis functions; modified sparse-matrix canonical-grid (SMCG) method;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2009.2029374
