The aim of this paper is to discuss rectangular and cylindrical representations of finite-difference time-domain (FDTD) method over characteristic tests and comparisons. A ring resonator is chosen as a canonical structure and modeled with both rectangular- and cylindrical-FDTD packages. Calibration against analytical exact solution derived in terms of cylindrical Bessel functions is also performed. It is shown that rectangular-FDTD with periodic boundary condition, where the computation domain is reduced, can also be applied in modeling circular structures.
AKLEMAN, FUNDA and SEVGİ, LEVENT (2008) "Comparison of Rectangular and Cylindrical FDTD representations on a Ring Resonator Problem," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 16: No. 1, Article 9. Available at: https://journals.tubitak.gov.tr/elektrik/vol16/iss1/9