Application of a multiregion model to the EM scattering from a rough surface with or without a target above it

• Published in: Chinese physics B Vol. 20; no. 5; pp. 12 - 22
• Main Author: 王安琪 郭立新 柴草
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.05.2011
• Subjects: Computer simulation; Conduction; Electric current; Electromagnetic scattering; Mathematical models; Method of moments; Mutual coupling; Scattering; 区域选择; 应用; 模型; 混合方法; 电磁散射; 相互耦合; 粗糙表面; 表面粗糙
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/20/5/050201

An efficient multiregion model is introduced to calculate the electromagnetic scattering from a perfectly electrical conducting （PEC） rough surface with or without a PEC target above it. In the multiregion model, the rough surface is split into multiple regions depending on their position along the rough surface. Two intermediate regions are chosen as the dominant region. If a target is located above the rough surface, the target will also be included in the dominant region. The method of moments （MOM） is only adopted on the dominant region to ensure validity. Hence, the new model can greatly reduce the number of unknowns associated with full MOM analysis. The induced electric currents on the other regions are obtained by approximately considering the mutual coupling between different regions along the rough surface. Compared with the published hybrid method, this new model is not only suitable for EM scattering from a target above a rough surface but also applicable for just rough surfaces. Several numerical simulations are presented to show the validity and efficiency of the multiregion model.