Hacked Gadgets Forum

December 1, 2013

Ambient Backscatter – Wireless Power and Communication with No Batteries

at 7:10 am. Filed under Cool Gadgets, Insane Equipment

 ambient_backscatter

 

Today we have lots of battery free electronic devices such as RFID which in most cases gets powered wirelessly from the reader. What would the world of electronics be like if our small electronics that only consumed a small amount of energy could be powered by the RF signals that are already around us. Ambient Backscatter does just this and has an endless number of interesting applications. Just think of the possibilities of device placement if servicing batteries was no longer a concern. In our modern cities we have no lack of RF noise so device placement should not be an issue.

I have no knowledge in this field so hopefully someone can chime in here. If this becomes popular and we have tens of thousands of these devices all over the place will the load on transmission towers increase due to this power leaching? Will TV and cell towers need to increase their power output to achieve the same coverage as they had before these devices were being used?

 ”Ambient Backscatter transforms existing wireless signals into both a source of power and a communication medium. It enables two battery-free devices to communicate by backscattering existing wireless signals. Backscatter communication is orders of magnitude more power-efficient than traditional radio communication.”


 

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5 Responses to “Ambient Backscatter – Wireless Power and Communication with No Batteries”

  1. Mzungu54 Says:

    The thing comes down to what is the communication distances(which is not great), and what size of the antenna u need to build it with(going to be huge)?

  2. anonEngineer Says:

    In regards to having to increase power output of transmitters, think of it this way; if you put a solar panel on your roof, does the sun get dimmer? The answer of course is no. However, the roof behind the panel is darker. In essance, though these devices will absorb radio waves, so do mountains and water and metal. As you can probably tell at this point, for tv and any other omnidirectional signal, most of the power is already lost to the environment. All these new devices will do is harness instead of waste the minute amount of radio wave energy they receive.

  3. Alan Parekh Says:

    Thanks for that information anonEngineer.

    I was thinking of it as a very loosely coupled transformer where an increase in secondary load will cause an increase in the primary.

  4. Ambient Backscatter – Wireless power and communication with no batteries » Hallo, here is Pane! Says:

    […] Via Hacked Gadgets. […]

  5. JD Says:

    “If this becomes popular and we have tens of thousands of these devices all over the place will the load on transmission towers increase due to this power leaching?”

    Nope. Imagining shining a flashlight out in the air, and then shining it into a black surface which absorbs all light. This won’t make the flashlight shine brighter :)

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