Numerical Methods for Electromagnetic Scattering by Large Structures

Engineers and researchers have long been interested§in efficiently modeling electromagnetic (EM)§scattering by electrically large structures. The§integral-equation-based Method of Moments results in§linear algebraic equations with large coefficient§matrices that require excessive computer storage and§execution time. The accumulation of errors while§inverting large matrices greatly impairs the accuracy§of the solution. The objective of the research aims§at making progress in this area. This book proposes§and analyses the progressive numerical method (PNM)§and the projection iterative method (PIM), including§formulations, operation counts, stopping criteria,§and their connection. In applications, the PNM works§fine for 2-D problems and can depress internal§resonances. The PIM is successful for both 2- and 3-D§problems. Both methods avoid matrix inversion by§dividing the object and using iteration, thus saving§computer memory and time. This monograph is an§important reference for university professors,§graduate students and professional engineers with§work or research involving numerical modeling for EM§scattering, especially by large structures.