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Systems and methods of beamforming in radio frequency identification applications

  • US 7,652,577 B1
  • Filed: 02/05/2007
  • Issued: 01/26/2010
  • Est. Priority Date: 02/04/2006
  • Status: Expired due to Fees
First Claim
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1. A system for radio frequency identification of a tag in an interrogation zone comprising:

  • a plurality of beamforming nodes each configured to generate radio frequency identification signals in a first frequency band;

    a calibration node disposed in the interrogation zone configured to measure a signal strength of the radio frequency identification data; and

    a reader node configured to receive the signal strength data and to adjust the radio frequency identification signals generated by the beamforming nodes based upon the signal strength data.

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