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Dual frequency radio tag for a radio frequency identification system

DC
  • US 7,271,727 B2
  • Filed: 11/09/2005
  • Issued: 09/18/2007
  • Est. Priority Date: 07/20/1999
  • Status: Expired due to Term
First Claim
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1. A radio frequency tag, comprising:

  • an antenna system;

    a first radio frequency receiver coupled to the antenna system and operable to receive and process request signals from a base station at a first frequency;

    a second radio frequency receiver coupled to the antenna system and operable to receive and process request signals from one or more other radio frequency tags at a disparate second frequency; and

    a transmitter coupled to the antenna system and operable to transmit response signals at the second frequency.

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