Evaluation of the FVTD technique for electromagnetic field problems containing highly inhomogeneous structures

In this paper, the cut-off frequency of the dominant mode of a finned waveguide is computed using the Symmetric Condensed Node Transmission Line Matrix (SCN-TLM) and Finite Volume Time Domain (FVTD) methods. The cut-off frequencies are computed for various sizes of fins as well as fine and coarse meshes. The values of the cut-off frequencies are obtained and compared with each other and with a benchmark solution.