Novel development of conformal FDTD method for large-scale electromagnetic simulations

A novel and smart data container is proposed to reduce the memory burden and improve the computational efficiency for electrically-large electromagnetic simulations of PEC objects. Based on the conformal FDTD method, the computational region is classified into the partial-fill, dielectric full-fill, and PEC full-fill regions. Since the electromagnetic fields in the PEC full-fill region are negligible, we eliminate the corresponding zero elements from the highly sparse 3D field component matrix to reduce the unknown number remarkably. To store the discontinuous field elements caused by the randomly eliminating operation, a smart matrix container is proposed, which is composed of sequential containers and associative containers. Numerical results show that the proposed method is highly remarkable to relax the memory burden and save the CPU time.