FDTD method: analysis of an one-dimensional array of H-plane sectoral horn antennas with dielectric lens

The FDTD method is used in the analysis of the radiation characteristics of a one-dimensional array antenna. Here, the array elements are two-dimensional H-plane sectoral horns with parabolic dielectric lenses. In this case, the dielectric materials used were chosen so that they have low dielectric constant in order to avoid considerable reflections on the air-dielectric interfaces. The numerical results obtained show that the distance between the array elements, and the lens characteristics, in spite of its low dielectric constant, change the phase distribution and power at the aperture of the array. For a suitable choice of these parameters, radiation patterns are obtained with low level of sidelobes.