Circuit design with energy storage circuit that operates on low power for WIPT

In recent years, sensors have been installed every-where in our daily lives to monitor human flow due to COVID-19 pandemic and for inventory control in warehouses.It is impractical to supply power and information to these IoT devices and sensors individually, and the use of microwave-based WIPT (Wireless Information and Power Transmission) for data and power transmission to each sensor is being considered. However, long-distance transmission is difficult due to the large free-space loss in the current microwave-based WIPT.In this research, we investigate a system and a device of a repeater to improve the transmission efficiency and extend the transmission distance of the WIPT system. In this paper, we report on the design and fabrication of a circuit for storing reliable power at low input power.