J. Phys. IV France 07 (1997) C1-135-C1-136
A New F.D.T.D. Algorithm for the Study of Ferrite with a Negative Effective PermeabilityCh. Melon, Th. Monediere and F. Jecko
IRCOM-URA 356 du CNRS, Equipe "Electromagnétisme", Faculté des Sciences, 123 avenue Albert Thomas, 87060 Limoges cedex, France
Ferrite materials are used in many microwave devices (circulators, isolators ...) which work in a frequency range where the effective permeability µeff of the ferrite can be either positive or negative. Many authors ,  and  have applied the F.D.T.D. method to the study of saturated ferrite when µeff is positive. The behaviour of the material is completly different when its effective permeability becomes negative . In this paper a new 2D F.D.T.D. algorithm is developed to study ferrite when µeff is negative. It is validated by computation of resonant frequencies and fields patterns of a ferrite resonant structure.
© EDP Sciences 1997