DURHAM, N.C., Nov. 7 (UPI) -- An array of cells using inexpensive materials can capture microwave signals from sources like satellites or WiFi to create electrical power, U.S. engineers say.
The power-harvesting technology, with efficiency similar to that of modern solar panels, can capture and utilized otherwise "lost" energy by converting the microwave signal to direct current voltage capable of recharging a cellphone battery or other small electronic device, scientist at Duke University reported Thursday.