A Hybrid Energy Harvesting System using Meandered Square Loop Rectenna for IOT Devices

This paper presents a hybrid energy harvester for wireless sensor node. The harvester comprises of a transparent compact meandered loop rectenna for RF energy harvesting mounted on solar panel to maximize the solar irradiance on the solar panel. The measured results shows an output dc voltage of 1.958 V have been achieved over 10 KΩ load for 316 µW power density at 868 MHz combined with a solar irradiance of 300 -400 lux. The proposed energy harvester finds its application in hilly (elevated) region where most cellular base stations has the same elevation as the sensor node.