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IEEE Microwave and Guided Wave Letters
Volume 10 Number 6, June 2000

The Determination of the Effective Radius of a Filamentary Source in the FDTD Mesh

Page 217.

Abstract:

This paper proposes a rigorous method for determining the effective radius, r_eff, of a single axial field component, E_z or H_z, in a two-dimensional (2-D) TM_z or TE_z FDTD grid, respectively. The method is based upon matching FDTD results for a filamentary field source with the analytical Green's function in two dimensions. We find that r_eff 0.2 grid cells over a wide range of grid resolutions. Further, our findings vividly demonstrate the nondissipative nature of the Yee algorithm even for very coarse grid resolutions.

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