Design of Spherical Convex Multibeam Dielectric Lens Antenna for Mobile Communication

Multibeam lens antennas are a potential future wireless communications technology. Finding the optimal feed position is necessary in multibeam applications. Focal region ray tracing is a highly effective approach for determining the optimum feed position. The focal region ray tracing on a spherical-convex lens is presented in this paper. Simple equations define the shape of the lens. The ray tracing is then performed and determination of feed position is applied. Finally, electromagnetic simulations at 28 GHz are performed for validation. It shows a good multibeam performance with 70% maximum aperture efficiency.