Analysis of rectangle dielectric antenna in time-domain

This paper analyzes propagation characteristic of electromagnetic (EM) wave in rectangle dielectric waveguide by effective dielectric constant (EDC) method. The relationship between phase velocity and dielectric rod size is shown. This paper also discusses the feasibility of rectangle dielectric antenna used in time-domain and presents how to choose antenna´s parameter and size. At the end of this paper some simulations are made by finite difference time domain (FD-TD) method. The influence of antenna´s size, length and taper on the propagation and radiation characteristic is analyzed. The result shows that rectangle dielectric antenna is likely to be used in time-domain.