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The FDTD method applied to the study of ferrites with a negative effective permeability: A new algorithm
Author(s) -
Melon Ch.,
Monediere Th.,
Jecko F.
Publication year - 1997
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19970420)14:6<340::aid-mop10>3.0.co;2-7
Subject(s) - circulator , ferrite (magnet) , finite difference time domain method , microwave , permeability (electromagnetism) , anisotropy , materials science , relative permeability , electronic engineering , engineering , physics , optics , chemistry , composite material , telecommunications , porosity , biochemistry , membrane
Ferrites, which are used in many microwave devices as circulators or isolators, have complex geometries. When subjected to a magnetic field ferrites exhibit anisotropic and dispersive permeability. If this magnetic field is orthogonal to the direction of propagation the ferrite is characterized by an effective permeability μ eff that can be either positive or negative. Many ferrite devices work in a frequency range where μ eff is negative. The particular behavior of ferrite in this case is studied in this article with the use of the finite‐difference‐time‐domain (FDTD) method. First phenomena are presented in a one‐dimensional case; then a new two‐dimensional FDTD algorithm is presented. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 14: 340–345, 1997.