Reseach On Electromagnetic Scattering From Combined Body Of Revolution And Arbitrary Target

In practical engineering, a series of simple bodies of revolution such as sphere, ellipsoid and finite length cylinder etc, are applied to test new computational electro-magnetic technologies and to correct instruments used to measure the RCS. While, in practical engineering, we will encounter electrically large bodies of revolution target scattering analysis such as warheads, rockets, radome, reflector antenna.Due to the axisymmetry of the structure, computational area is reduced from a con-ventional three-dimensional region to a two-dimensional region, which achieves the goal of efficient and fast calculation by reducing the solution area and number of unknows and saving computational memeory requirement and CPU time.This thesis studies the BOR and arbitrary target composite structure to pro-vide an efficient solution for solving electrically large complex targets, and studies the composite metallic and dielectric structure to lay the root for more complex application.This thesis describes the surface integral equation and volume integral equation methods, and process of applying the method of moments to solve the integral equation, and describes the RWG, CRWG and SWG basis functions.Then the bodies of revolution method of moments(BORMOM) is introduced. Detailing its principles and basis functions as well as the impedance matrix formula derivation.Then electromagnetic scattering from structures consisting of combined body of revolution and arbitrary surfaces is studied. Applied Surface integral equation, using BOR basis function expanding rotating structure, non-rotating structure surface using traditional RWG simulation, we use the method of moments to solve the combined structure. Accurate and efficient analysis can be obtained by utilizing the symmetry of the rotary structure.Finally, we study the composite structure of BOR and dielectric. I introduce Volume and Surface Integral Equation (referred VSIE), then detail coupling between BOR basis function and volume basis function, and apply it to specific examples.