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Radio frequency identification system

  • US 20080100446A1
  • Filed: 10/27/2006
  • Published: 05/01/2008
  • Est. Priority Date: 10/27/2006
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) system comprising:

  • a radio frequency (RF) reader for transmitting a first RF signal having a first frequency; and

    an RFID tag configured to receive the first RF signal and, in response thereto, to transmit a second RF signal having a second frequency, wherein the second frequency is between 30 GHz and 300 GHz and the first frequency is less than 30 GHz.

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