Reconfigurable Intelligent Surface (RIS) Design for 5G n260 Frequency Band

In this paper, a new low profile reconfigurable intelligent surface design with high resolution steering reflector and wide frequency band width is proposed at n260 frequency band, used for 5G new radio applications. The dynamic reflection phase and tunability is realized by integrating of varactor diode with each unit cell. This study presents design procedures, reflection simulation verifications, and the effects of important parameters on the performance of the proposed novel resonant unit cell. The proposed unit cell offers a dynamic reflection phase range of more than 270° at a wide frequency bandwidth. Simulation results of beam steering capability in horizontal plane at 38 GHz is presented to verify the design performance of the RIS.