Diseño y simulación de una lente de Rotman en tecnología microstrip en la banda X

Abstract

In this work the results of design and simulation are presented. The geometric optics and the two-dimentional aperture model were used to design and model the lens, the former is used to obtain the physical geometry and the latter to describe the approximate behavior of the lens. Matlab was used to process information and to obtain the input and output port’s coordinates, the power and phase distribution and ideal radiation diagrams for each input port. In addition, to verify the required pointing angles, a prototype of the final lens was modeled and simulated using a commercial electromagnetic software.

To optimize the behavior of the lens, the original model was modified in order to analyze the influence of different parameters in the final result. The error in pointing angles in the final model was less than one degree. The Rotman lens was designed at 10GHz using microstrip technology given its cost and size advantages. The RO4003C susbtrate, available in Antenna’s Laboratory, was used to implement the final model. It could be used in comercial applications such as 5G technology wich requires massive MIMO systems and in military applications as an antenna feed system in radar equipment.