Abstract
In this paper, the Finite-Different Time-Domain (FDTD) schemes were used to find antenna parameters of the simulated dipole antenna. The dipole model has a feeding gap, and there are four FDTD cells around the feeding point. For flexibility in the simulation, the width of the feeding gap can be varied, and results were compared with results from simulations using the Moment Method (MOM). For standard FDTD scheme, there are four equations represent field variations at the center-fed cell. However, this paper proposes a field formulations that reduce from four equations to two equations. In this paper, input impedances and the return losse are ploted as a function of the ratio of dipole's length and a wavelength (L/λ). Simulations show that FDTD schemes give results agree well with the results from MoM. However, FDTD simulation time is much less than the one used in the MOM simulation.
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