Fast Fourier Transform Accelerated Finite-Difference Delay Modeling Method

作者：Ding, Ji^*; Li, Jianfeng; Liu, Fan

来源：Electromagnetics, 2016, 36(6): 353-365.

DOI：10.1080/02726343.2016.1207748

• Finite-difference delay modeling
• fast Fourier transform
• time-domain integral equation
• fast algorithm

This article presents the fast Fourier transform scheme to accelerate the solution of finite-difference delay modeling method. The proposed fast Fourier transform-finite-difference delay modeling method projects the primary source onto a uniform auxiliary grid that enclosed the scatterer. The auxiliary sources can reproduce the equivalent transient fields of the primary source when source and observation points are far away from each other. After the projection, the impedance matrices have the spatial and temporal translational invariance property. The fast Fourier transform-finite-difference delay modeling method takes advantage of the translational invariance property to reduce the memory requirement and computational complexity of the original finite-difference delay modeling method. Numerical results about the electromagnetic scattering from perfect electric conductor objects are given to demonstrate the validity and efficiency of the proposed method.

• 出版日期2016
• 单位河海大学