An Analysis on Magnetostatic Waves by FDTD Method

Toshiro KODERA  Hitoshi SHIMASAKI  Makoto TSUTSUMI  

IEICE TRANSACTIONS on Electronics   Vol.E83-C   No.5   pp.713-719
Publication Date: 2000/05/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Developments in Guided-Wave Problems)
magnetostatic wave,  nonlinear analysis,  ferrite,  FDTD method,  gyromagnetic equation,  

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This report introduces a new approach to the time domain analysis of the magnetostatic wave in ferrite materials. The time domain analysis is carried out by the finite difference time domain (FDTD) method. To include the gyromagnetic properties which is the origin of magnetostatic wave, direct differentiation of magnetic dipole moment equation in time and space domains without any approximation are carried out and is combined with Maxwell's equation under the FDTD method. As a result, the possibilities of the analysis on the magnetostatic wave with the FDTD method are confirmed and the validities of this approach are confirmed by some inspections. In addition, the analyses of the nonlinear characteristics on the magnetostatic backward volume waves (MSBVW) are carried out and clarify the dependance of the space profile on the input power.