The studies of cylindrical microstrip line with the FD-TD method in cylindrical coordinate system

In this paper, a full-wave two dimensional Finite-Difference-Time-Domain method in cylindrical coordinate system is developed, in which the arch is chosen as the difference cell. It is proved that the method is efficient and economical in both CPU time and temporary storage requirement, and potentially useful for the numerical analysis of dispersion of cylindrical guidewave structure. the numerical results, including the dispersive curves of the cylindrical single microstrip line and the coupled microstrip line are presented.