Tag Archives | ambient

wifi_backscatter

No power source needed for new wireless communications technique

A new wireless communications technique uses what researchers call “ambient backscatter” to allow devices to communicate and exchange information with each other by reflecting (or absorbing) existing radio and television signals. Impressively, the devices do not require any power source apart from the existing ambient radio and TV signals that already surround us. “We can […]

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energy_scavenging

Harvested TV, radio signals power devices




Georgia Tech scientists using a novel printable ultra-wideband antenna have shown that the ambient electromagnetic waves from TV stations, radio stations, satellites and cell phones can be harvested and used to power a range of electronic devices. “There is a large amount of electromagnetic energy all around us, but nobody has been able to tap […]




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