Scattering Characteristics, Based On The Partial Exposure Of The Large Target Of The Method Of Moments

With the development of radar technology, the research of electromagnetic scattering from electrically large structures has attracted much attentions for long time because of strong engineering application requirement. In this paper, the electromagnetic scattering characteristics of some electrically large metallic structures that have local illumination are researched. Firstly, the ponderance of these characteristics is pointed out. Secondary, some investigations of present research methods are reported and compared. Then the derivation of local illumination source is reported, the near-field electromagnetic scattering characteristics of some electrically large structures are calculated and analyzed. What's more, the concept of effective illumination area is pointed out and proved by using numerical method, some useful conclusions are drawn. Finally, the entire domain Galerkin method is adopted to analyze the backward scattering characteristic of electrically large metallic plate in local illumination.In Chapter 1, the background and the developments of methods to analyze the characteristic of electrically large structures in recent ten years are reviewed. The advantages and disadvantages are introduced respectively, in the aspects of computational time and the accuracy of the result. Lastly, the research contents and innovations are reported.In Chapter 2, the method of moment (MoM) and the electric field integral equation (EFIE) are introduced respectively. The sub-domain is used to solve the entire equivalence current integral equation. Two sub-domain basis functions are adopted respectively to calculated the RCS of electrically large metallic plate in plane wave illumination. The two basis functions are pulse function with point match and RWG function with Galerkin method. The results are compared and discussed.In Chapter 3, the derivation of local illumination source is reported. The method of...