The Characteristic Basis Function Method (CBFM): A Numerically Efficient Strategy for Solving Large Electromagnetic Scattering Problems

Authors : Eugenio LUCENTE, Gianluigi TIBERI, Agostino MONORCHIO

Pages : 41-56

View : 16 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The objective of this paper is to describe a numerically efficient strategy for solving large electromagnetic scattering problems. This novel approach, termed as the Characteristic Basis Function Method insert ignore into journalissuearticles values(CBFM);, is based on utilizing Characteristic Basic Functions insert ignore into journalissuearticles values(CBFs);-special functions defined on macro domains insert ignore into journalissuearticles values(blocks);-that include a relatively large number of conventional sub-domains discretized by using triangular or rectangular patches. The CBFs can be derived either analytically insert ignore into journalissuearticles values(from PO solutions);, or by applying the conventional MoM. Use of these basis functions leads to a significant reduction in the number of unknowns, and results in a substantial size reduction of the MoM matrix. This, in turn, enables us to handle the reduced matrix by using a direct solver, without the need to iterate. Numerical results that demonstrate the accuracy and time efficiency of the CBFM for several representative scattering problems are included in the paper.
Keywords : Characteristic Basis Functions, Method of Moments, Electromagnetic Scattering, Radar Cross Section, Electrically Large, Integral Equation Method, High Frequency, Spectral Domain