In today’s somewhat creepy too-good-to-be-true technology announcement is this technique called Ambient Backscatter. In the demo, researchers create 2 devices that neither one takes batteries, yet they are able to communicate to each other. The devices harness radio waves that are already in the air like TV signals.
By either choosing to absorb or reflect the existing signals, the other device notices either a 1 or a 0. Thus data transfer wirelessly, without batteries! These devices have to run on real low power to work, because it’s consuming some of the rf signals to harness as power. The future for these devices is huge, imagine tons of little smart objects that can communicate, that don’t need batteries! People are already making small things that sip battery power but they do eventually need batteries. And typically those devices if they communicate wirelessly they are power hungry.
Amazing technology. Read more on the writeup on phys.org for a more detailed explanation, or watch the video below.