Rotman-Lens-Based Reconfigurable Intelligence Surface mmID with Energy Harvesting Capability

This paper presents a low-power and potentially energy-autonomous Rotman Lens-based reconfigurable intelligence surface millimeter wave identification (mmID) that is able to harvest and communicate selectively with a power consumption of 159.6 µW at 28 GHz. The prototype is inkjet-printed on a thin Rogers substrate using a masking technique followed by etching. Its harvesting performance is evaluated by its rectifier efficiency and the system is able to turn on at 2.5 dBm input power. Its communication ability is evaluated indoors in both close range and medium range. The system displays a medium-range communication capability up to 10 m with 41 dBm effective isotropic radiated power (EIRP) and can harvest 28 GHz signals up to 11 m and communicate up to 125 m with 75 dBm EIRP.