The Associated Hermite FDTD Method With the Thin-Wire Modeling in Low-Frequency Cases

To analyze the thin-wire model in low-frequency cases, the unconditionally stable Associated Hermite finite-difference time-domain (AH FDTD) method is proposed in this paper. The thin wire model combined with the AH domain operators is applied to update the coefficient matrix equation of the 3-D AH FDTD method to get the final solution. Two examples related with a dipole antenna and a Yagi antenna are set up to verify the proposed algorithm. Compared with the conventional FDTD method, the efficiency for the proposed method is enhanced by as high as a factor of 15 while keeping a sound accuracy in low-frequency cases.