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LOW POWER RADIO FREQUENCY COMMUNICATION

  • US 20140062668A1
  • Filed: 03/05/2013
  • Published: 03/06/2014
  • Est. Priority Date: 04/05/2012
  • Status: Active Grant
First Claim
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1. An RF tag for use in a sensor network, the tag comprising:

  • an energy harvesting unit operable to convert incident RF energy to direct current (DC);

    a storage unit operable to store recovered DC power;

    one or more sensors for sensing;

    a backscatter communicator to backscatter energy to communicate; and

    a microcontroller coupled to the energy harvesting and storage units, the one or more sensors, and the backscatter communicator, the microcontroller operable to wake up from a sleep state and cause the backscatter communicator to communicate sensed data from at least one of the one or more sensors while powered by energy previously harvested and stored by the energy harvesting and storage unit.

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