• US 20080036588A1
  • Filed: 06/25/2007
  • Published: 02/14/2008
  • Est. Priority Date: 06/23/2006
  • Status: Active Grant
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First Claim
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1. A wireless system that, when in operation, is coupled to an RF field transmitted by a power-emitting master unit, the system comprising:

  • an antenna;

    an electrical energy storage unit connected to the antenna, wherein the energy storage unit receives energy via electromagnetic coupling of the antenna with the RF field, at least a part of the received energy being stored in the energy storage unit; and

    an electronics package powered solely by the received energy, the electronics package including a sensor, a processor that is capable of acquiring data from the sensor, and a transmitter connected to the processor and to the antenna, wherein the energy storage unit is capable of storing sufficient received energy to supply power for the transmitter to transmit a message wirelessly via the antenna, the message containing data acquired by the processor from the sensor.

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