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RFID verifier

  • US 7,221,278 B2
  • Filed: 09/16/2004
  • Issued: 05/22/2007
  • Est. Priority Date: 09/16/2004
  • Status: Expired due to Fees
First Claim
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1. An RFID verifier, comprising:

  • a transceiver operable to interrogate with an interrogating signal an RFID tag and to receive a resulting backscattered signal from the interrogated RFID tag;

    a transmit signal strength indicator operable to measure the interrogating signal power;

    a received signal strength indicator operable to measure the signal power from the interrogated RFID tag; and

    a processor operable to compare the measured interrogating signal power and RFID tag signal power to obtain a measure of quality for the interrogated RFID tag.

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