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INTERROGATING DEVICE, RFID INTERROGATOR, AND RFID INTERROGATING METHOD

  • US 20090289767A1
  • Filed: 02/10/2009
  • Published: 11/26/2009
  • Est. Priority Date: 05/20/2008
  • Status: Abandoned Application
First Claim
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1. An interrogating device that transmits a signal to an electronic tag that generates a response signal by controlling a reflectivity at a reception end to at least a first reflectivity and a second reflectivity higher than the first reflectivity, the interrogating device comprising:

  • a transmitting unit that transmits a transmission signal to the electronic tag;

    a receiving unit that receives a response signal in response to the transmission signal from the electronic tag;

    an extracting unit that extracts, from the response signal, a signal portion to which the second reflectivity is applied based on strength of a reception signal; and

    an estimating unit that estimates reception quality in the electronic tag based on the signal portion extracted by the extracting unit.

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