wireless energy harvesting

Converting the radio transmissions in the air into power. All wireless signals comprise energy and data, the latter derived by the way the radio waves are modulated. Wireless energy harvesting (WEH) is used to power low-energy devices such as the Internet of Things (see IoT). When optimized for specific wireless signals such as Wi-Fi, wireless energy harvesting can generate a predictable power source. However, to harvest the energy from multiple frequency bands, a more complicated WEH device is required.

Thousands of Signals

All day long, thousands of electromagnetic signals are in the air from radio, TV and cellular towers, satellites, Wi-Fi and Bluetooth. To put this energy to more use than the data transmission it was designed for is the challenge of wireless harvesting. See electromagnetic hypersensitivity.