A 3-D Total-Field/Scattered-Field Plane-Wave Source for the Unconditionally Stable Associated Hermite FDTD Method

In this letter, we apply the basic principle of the total field/scattered field method to the 3-D associated Hermite unconditionally stable finite-difference time-domain (FDTD) method (AH FDTD) and achieve the plane-wave incidence for the 3-D AH FDTD method. The theory of the translation operator is...

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Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 23; no. 2; pp. 628 - 632
Main Authors Huang, Zheng-Yu, Jiang, Feng, Chen, Zi-An, Liu, Shao-Bin, Li, Chao, Shi, Li-Hua
Format Journal Article
LanguageEnglish
Published New York IEEE 01.02.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Computational modeling
Current density
Finite difference methods
Finite difference time domain method
Finite-difference time-domain (FDTD)
Magnetic domains
Magnetic fields
multiple small-steps (MSS)
Plane waves
plane-wave incidence
Thermal expansion
Three-dimensional displays
Time-domain analysis
translation operator
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Summary:In this letter, we apply the basic principle of the total field/scattered field method to the 3-D associated Hermite unconditionally stable finite-difference time-domain (FDTD) method (AH FDTD) and achieve the plane-wave incidence for the 3-D AH FDTD method. The theory of the translation operator is introduced, and the electric and magnetic density are expressed explicitly in the AH domain. Then, the expansion coefficients of the incident plane-wave at any point are calculated using the AH translation operator and the multiple small-steps method. Numerical examples demonstrate the accuracy of the proposed method, particularly when computing a model with low-frequency or large wavelength-grid ratios.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2023.3331381