AM, FM, DAB, digital television and the internet - which is more energy-efficient? And what effect could switching off certain radio platforms have on energy use? Is FM radio more energy-efficient ...

Add Yahoo as a preferred source to see more of our stories on Google. In a major development, researchers have created a transparent device that can harvest energy from both radio waves and sunlight ...

Have you recently stopped to think about how much energy your radio broadcasts use? That was the question the BBC has attempted to answer about both its radio and TV energy consumption in a recently ...

Radio-frequency (RF) wave rectifier circuits play an invaluable role in extracting the appropriate DC voltage and current in wireless energy applications, such as mobile power supplies and ...

The author runs International Media Action, a non-profit engineering organization that helps build community radio stations. KCAW is a community radio station in Sitka, Alaska, a city with a ...

Earlier this year, a company called Betavolt made news by announcing a nuclear battery that can go on for 50 years before needing a recharge. Technology is marching further ahead. In the future, at ...

Gleaning electricity from radio signals isn’t super-efficient (or a new concept), but it’s possible technically. Two companies from Japan have recently come up with new devices that can do just that: ...