Scientists have invented a device that converts Wi-Fi signals into electricity that powers electronic devices without the need for a battery.
This invention resulted in a small two-dimensional device that is operated only by the waves of Wi-Fi passing through it.
According to the team of scientists, Wi-Fi technology can become a source of widespread energy thanks to advanced semiconductors, which turn the signals into useful direct current.
The antennas known as “rectennas” convert alternating currents (ACs) into direct electrical current, which is more useful for electronics.
The new antennas pick up the “electromagnetic” wavelengths of electromagnetic currents, including those that carry Wi-Fi wireless waves, and convert them into semiconductor wireless energy.
The team from the Massachusetts Institute of Technology claims that the device can operate large electronic devices and wearable devices and even medical devices.
The scientists used a highly flexible material known as Molybdenum Disulfide (MoS2), one of the thinnest semiconductors in the world, to convert the energy of Wi-Fi signals into electricity.
“This design has enabled a fully flexible device, fast enough to cover most of the RF bands used by our daily electronic devices, including Wi-Fi, Bluetooth, LTE networks for cellular communication, etc.” said Ch Chang, author of the study.
The new technology can produce about 40 megawatts of power, depending on the power of the Wi-Fi source (about 150 megawatts). This energy is sufficient to illuminate the mobile screen, as well as wearable medical devices.
Source: Daily Mail