Open AccessUPML‐ABC and TF/SF boundary for unconditionally stable AH‐FDTD method in conductive medium
Author(s) -
Huang ZhengYu,
Shi LiHua,
Zhou Yinghui,
Chen Bin
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.2488
Subject(s) - finite difference time domain method , perfectly matched layer , lossy compression , scattering , mathematics , mathematical analysis , boundary value problem , transformation (genetics) , physics , computational physics , optics , chemistry , gene , biochemistry , statistics
For analysing the scattering problem in conductive medium with the new unconditionally stable associated Hermite (AH) finite‐difference time‐domain (FDTD) method, the formulation of uniaxial anisotropic perfectly matched layer absorbing boundary condition (UPML‐ABC) and the total‐field/scattered‐field (TF/SF) implementation scheme are deduced. By virtue of AH differential transformation matrix and the eigenvalue transformation, frequency‐dependent parameters of the lossy medium can be well treated in AH‐UPML, without using any additional auxiliary variables. Numerical verification for the scattering of buried conductor in lossy half‐space is performed. Compared with Mur's ABC, UPML increases the absorbing performance by more than 80 dB in AH‐FDTD analysis.