A Hybrid MoM-PO Method Combining ACA Technique for Electromagnetic Scattering from Target above a Rough Surface

摘要

In this paper, an efficient hybrid method of moments (MoM)-physical optics (PO) method combining adaptive cross approximation (ACA) technique is applied to calculate the electromagnetic scattering from three-dimensional (3-D) target and rough surface composite model. The current on the rough surface is obtained through the PO approximation, while the current on the target surface is obtained through the MoM. Furthermore, an ACA technique is used to accelerate the coupling interaction between the target and the rough surface. Numerical results demonstrate that the memory and time cost can be substantially reduced without losing precision by applying the hybrid method, and which can be used to analyze large scale target/rough surface scattering problems.