Circularly polarized device for 5G-NR applications on Industry 4.0

This work presents a 5G eMBB (Enhanced Mobile Broadband) device with a circularly polarized radio frequency front-end operating at 3.75GHz. This function enhances the system's reliability and versatility without being affected by its orientation or position. To achieve this goal, the study presents the design of a dual-polarized antenna array that is combined with a 90◦ hybrid coupler. The radiating structure of the antenna is then connected to a 5G eMBB commercial module, and practical results are obtained in terms of RSSI (Received Signal Strength Indication) and throughput using the circularly polarized radio interface. These results are then compared to the equivalent linear single polarization structure.