An Accelerated SBR for EM Scattering From the Electrically Large Complex Objects

In this study, an accelerated shooting and bouncing ray (SBR) method was proposed to improve the computational efficiency of electromagnetic (EM) scattering from the electrically large complex objects. Initially, an open graphics library was employed to speed up the shadow faces removal. Then, the neighbor search technique was utilized to accelerate the ray tracing process, which was different from traditional SBR based on the traversal algorithms of Octree. The validation of the proposed method was verified by comparing the simulation results with those of the FEKO multilevel fast multipole method. Moreover, the EM scattering from two electrically large complex ship models was analyzed, and a desirable acceleration ratio was achieved. Therefore, the accelerated SBR method yields a superior performance for scattering analysis of electrically large complex targets, especially at high frequency.