Focal Region Ray Tracing of Dielectric Lens Antennas for Multibeam Designing

Multibeam lens antennas are promising technology for future wireless communications. The most well-known multi-beam lens is the Abbe’s sine condition lens. On multibeam applications, finding optimum feed position is required. Focal region ray tracing is a very useful technique to find possible best feed position. In this paper, focal region ray tracing on Abbe’s sine condition lens is presented. Lens shape is determined by the lens shaping method. Then, the ray tracing is conducted. It shows good agreement with the theoretical locus of Abbe’s sine condition lens. Electromagnetic simulation at 28 GHz also shows good multibeam radiation pattern in wide angle range.