Researchers Believe They Can Harvest Usable Electricity From Radio Waves

radio-waves

Via phys.org:

An energy harvesting technology that its developers say will be able to turn ambient radio frequency waves into usable electricity to charge low power devices was unveiled in London on Wednesday.

Former British science minister Lord Paul Drayson launched “Freevolt” in a theatre at the Royal Institution, where electromagnetism pioneer Michael Faraday delivered his lectures in the mid-19th century.

Drayson demonstrated the energy created by the signals from mobile phones being used by attendees at the presentation before utilising it to power a loudspeaker in the lecture hall.

The Freevolt technology has a multi-band antenna and rectifier—a type of battery that converts alternating current to direct current—and is “capable of absorbing energy from multiple radio frequency bands,” its developers Drayson Technologies and Imperial College London said in a statement.

Link

Researchers Believe They Can Harvest Usable Electricity From Radio Waves