Open AccessA direct discrete-finite-difference time-domain implementation of electromagnetic scattering by magnetized ferrite medium
Author(s) -
Lixia Yang,
Debiao Ge,
Zhao Yue-Hua,
Gang Wang,
Yan Shu
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.2936
Subject(s) - finite difference time domain method , physics , time domain , ferrite (magnet) , mathematical analysis , constitutive equation , magnetic domain , optics , magnetic field , mathematics , computer science , quantum mechanics , magnetization , finite element method , computer vision , thermodynamics
Based on the constitutive relation between the magnetic permeability and magnetic flux density, the constitutive relation of magnetized ferrite medium in frequency domain is transformed to the time domain by using the corresponding relation between the time-differential operator /t and jω. And the constitutive relation including the time-differential operator /t in time domain is presented. By the introduction of a direct-discrete method, the time-differential operator /t is dispersed. Then direct discrete-finite-difference time-domain(DD-FDTD) iterative formula are derived in the discrete time domain. To exemplify the availability of the algorithm, the backscattering radar scattering section of a magnetized ferrite sphere is computed, and the numerical results are the same as the reference values, and show that the DD-FDTD method is correct and efficient.