Cylindrical FDTD grid-compatible Greens functions
Cylindrical grid-compatible discrete Greens functions (DGFs), derived from the first principles of the FDTD-discretized Maxwells equations, are the topic of this work. These functions enable the hybridization between differential and integral equation based numerical methods. The DGF replicates the FDTD solutions, as opposed to an outright discretization of the continuous Greens function (CGF). The cylindrical formulation is attractive since it is inherently axially symmetric, such that it fits the description of a point source.
maxwells equations finite difference time domain (fdtd) cylindrical coordinates