Most of the devices and sensors connecting to the Internet of Things (IoT) rely on transmitting radio waves to communicate, which requires power, which means batteries if mains power isn't an option.

Engineers have designed the first battery-free cellphone that can send and receive calls using only a few microwatts of power, which it harvests from ambient radio signals or light. It's a major step ...

At CES, we saw Samsung show off a TV remote that powers itself with nearby wireless waves, eliminating the need to even have a battery. While our own A/V Editor Phil Nickinson is skeptical about the ...

IoT sensors that don’t require power sources could be coming soon. Researchers from University of California, San Diego, claim they’ve figured out how to optimize lab-based modules to such an extent ...

If you've ever been caught out with a dead phone battery in the middle of nowhere, take heart. A team of researchers from the University of Washington (UW) have developed a phone that requires no ...

Researchers report that lab tests of a new metasurface-based antenna that can harvest 100 microwatts of power, enough to power simple devices, from low power radio waves. This represents an important ...

The no-frills battery-free phone prototype is powered by ambient radio signals or light. Mark Stone/University of Washington In 1945, a hand-carved wooden copy of the Great Seal of the United States ...

File this under, “Technology I Never Knew Existed,” but Nokia says that in a few years time, they will be able to charge cell phones by using ambient radio waves. This intriguing and exciting ...

Abstract: Traditional active radars transmit a powerful electromagnetic pulse and record the echo's delay time and power to measure target properties of interest, such as range, velocity, and ...

WASHINGTON — Researchers have developed a new metasurface-based antenna that represents an important step toward making it practical to harvest energy from radio waves, such as the ones used in cell ...