Web Desk: Scientists have invented a machine that converts Wi-Fi signals into electricity to power devices without the need for a battery, reports Dailymail.
The two-dimensional device is powered solely by Wi-Fi waves passing through it.
According to researchers, Wi-Fi could become a widespread power source thanks to a cutting-edge semiconductor that converts the signal into a useful direct current.
Antennas known as ‘rectennas’ convert alternating current (AC) waves into direct current voltage, which is more useful for electronics.
A new type of rectenna captures Wi-Fi waves carrying the Wi-Fi and converts them to wireless energy using the semiconductor.
The team, from MIT, claim the device could power large-area electronics, wearables and even medical devices to beam data to doctors.
‘We have come up with a new way to power the electronics systems of the future – by harvesting Wi-Fi energy in a way that’s easily integrated in large areas – to bring intelligence to every object around us,’ said Professor Tomás Palacios, who co-authored the study.
The rectenna uses a radio-frequency antenna to capture electromagnetic waves carrying Wi-Fi in the form of AC waves.
This is then connected to a flexible and inexpensive two-dimensional semiconductor.
The AC Wi-Fi signal travels into the semiconductor and is converted into a DC voltage that could be used to power electronic circuits or recharge batteries.
This conversion requires a piece of equipment known as a rectifier. Most traditional rectifiers are thick and inflexible.