Frequency Selective Surface Structures-Based RF Energy Harvesting Systems and Applications: FSS-Based RF Energy Harvesting Systems

With the recent developments in the field of ultralow-power wearable and portable electronic gadgets and wireless sensor networks, the number of devices and sensors in a system has increased significantly [1] . The emergence of the Internet of Things has added many additional devices and sensors connected via the Internet [2] , [3] . It is also anticipated that the number of connected devices will continue to increase in the coming years [4] . Currently, batteries remain the only source of power for these interconnected devices and systems.