Modeling Gyromagnetic Media in Symmetrical Condensed Node TLM

L. de Menezes and W. J. R. Hoefer

12th Annual Review of Progress in Applied Computational Electromagnetics, pp 294-301, Monterey, California USA, March 18-22 1996.


In this paper the symmetrical condensed node (SCN) TLM model of gyromagnetic materials is described. The constitutive relations of the medium are represented by equivalent sources connected to the node. The resulting TLM scattering matrix is independent of the material behavior. The equivalent sources are calculated at each timestep and included in the scattering procedure of TLM. This approach is robust, general, and capable of modeling the frequency dependent characteristics of the gyromagnetic medium in time domain. The technique has been implemented and used in the simulation of a resonance ferrite isolator.

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