A combination of time domain finite element-boundary integral with time domain physical optics for calculation of electromagnetic scattering of 3-D structures

This paper presents a hybrid numerical approach combining an improved Time Domain Finite Element-Boundary Integral ( FE-BI) method with Time Domain Physical Optics (TDPO) for calculations of electromagnetic scattering of 3-D combinative-complex objects. For complex-combined objects containing a small size and large size parts, using TDPO is an appropriate approach for coupling between two regions. Therefore, our technique calculates the objects complexity with the help of FE-BI and the combinatory structures by using of the TDPO. The hybridization algorithm for restrictive object is implemented and the numerical results validate the superiority of the proposed algorithm via realistic electromagnetic applications.