Surface Asymptotic Phase Function Of The Ap-crwg Combination Of The Aca Algorithm

Together with the development of methods to measure electromagnetic field, research activities in the electromagnetic emission of electrically large conductors are carefully watched. For the analysis of electrically large conductors, conventional methods of moment proved to be limited because memory usages and CPU time. As a matter of fact, finding a method enabling, under limited computer resource circumstances, the modeling and calculating accurately of the electromagnetic scattering of electrically large conductors has become an important research objective.Firstly, the thesis introduces important principles and techniques of methods of moment used in integral equations such as electromagnetic field integral equations (EFIE) and options related to basic function and weight function. Secondly, the thesis provides the analysis of the relationship between surface current and forward wave in details, which leads to the Curve Asymptotic Phase Basic Function (AP-CRWG). Then this thesis proceeds with the introduction of basic AP-CRWG applicable for the analysis of the electromagnetic scattering of electrically large conductors. This basic function is efficient in reducing the number of unknown, memory and calculation time whose results are completely agree with classic methods. Finally, in order to improve calculation efficiency further, this thesis presents two techniques, including Matrix Sparsification Technique and basic function of AP-CRWG combined with Adaptive Cross Approximation Algorithm (ACA).