Efficient PML Implementation for Approximate CN-FDTD Method

被引：20

作者：

Jiang, Hao Lin ^{[1
]}

Cui, Tie Jun ^{[1
]}

机构：

[1] Southeast Univ, State Key Lab Millimeter aves, Nanjing 210096, Jiangsu, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2019年 / 18卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Bilinear transform (BT); Crank-Nicolson approximate-factorization-splitting (CNAFS); finite-difference time-domain (FDTD); perfectly matched layer (PML); PERFECTLY MATCHED LAYER; CRANK-NICOLSON SCHEME; CFS;

D O I：

10.1109/LAWP.2019.2901303

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Instead of applying the standard Crank-Nicolson (CN) method, an efficient perfectly matched layer (PML) based on the CN approximate-factorization-splitting (CNAFS) scheme is proposed to terminate three-dimensional (3-D) finite-difference time-domain lattices. It can not only be free from the Courant-Friedrich-Levy limit, but also has higher efficiency than the standard CN-PML. Considering that its iteration form based on the original CNAFS scheme is still complicated, its calculation speed is further improved via introducing a series of intermediate variables. All mathematical derivations are based on the bilinear transform method to guarantee the accuracy. Finally, the absorption performance, computational efficiency, and unconditional stability of our work are verified through two 3-D numerical examples of electromagnetic waves radiating in homogeneous spaces.

引用

页码：698 / 701

页数：4

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