A Novel Nonuniform Grid AH FDTD Method for Fine Structure by Using the Coordinate Transformation

被引：0

作者：

Duan, Hai-Yan ^{[1
]}

Huang, Zheng-Yu ^{[1
]}

Tan, Eng Leong ^{[2
]}

Liang, Yan-Qiu ^{[1
]}

Jiang, Feng ^{[1
]}

Gong, Xiu-Zhen ^{[1
]}

Zhang, Xin-Ge ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Key Lab Radar Imaging & Microwave Photon, Nanjing 210016, Peoples R China

[2] Nanyang Technol Univ, Sch Eletr & Elect Engn, Singapore 210016, Singapore

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2024年 / 23卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Finite difference methods; Mathematical models; Time-domain analysis; Numerical stability; Power system stability; Accuracy; Stability criteria; Associated hermite (AH); coordinate transforma- tion; fine structure; finite-difference time domain (FDTD); nonuniform grid; UNCONDITIONALLY STABLE SCHEME; ALGORITHM;

D O I：

10.1109/LAWP.2024.3425715

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：

This letter proposes an associated hermite finite-difference time-domain (AH FDTD) method suitable for nonuniform grids, which is implemented based on coordinate transformation. A coordinate transformation that can transform nonuniform grids into uniform grids is introduced. Subsequently, by combining the 2-D AH FDTD method with the aforementioned coordinate transformation, a five-point coefficient matrix equation for the electromagnetic field component is obtained. The proposed method is verified by calculating the magnetic field inside a waveguide filled with a lossy medium. The effects of varying different coordinate transformation parameters on the computational accuracy of electromagnetic scattering from metal thin plates with gaps have been investigated. Compared to traditional methods, this method can save computation time while ensuring high computational accuracy when dealing with electromagnetic problems of fine structures. It can also guarantee computational stability even when the ratio of coarse grid size to fine grid size is large.

引用

页码：3118 / 3122

页数：5

共 31 条

[31] A Novel Computational Method for Deriving Protein Secondary Structure Topologies Using Cryo-EM Density Maps and Multiple Secondary Structure Predictions
Biswas, Abhishek
Ranjan, Desh
Zubair, Mohammad
He, Jing
BIOINFORMATICS RESEARCH AND APPLICATIONS (ISBRA 2015), 2015, 9096 : 60 - 71

← 1 2 3 4 →