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System for powering and reading RFID tags

  • US 20080150696A1
  • Filed: 12/21/2006
  • Published: 06/26/2008
  • Est. Priority Date: 12/21/2006
  • Status: Active Grant
First Claim
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1. A system for identifying products bearing RFID tags using a reader receiving data signals transmitted on a data frequency by tags on a multiplicity of such products, the tags being powered by received RF energy on a power frequency, comprising:

  • a product-containing area within which the multiplicity of products are located,one or more readers within the product-containing area to receive transmitted data from the RFID tags on the data frequency, anda plurality of power nodes within the area, the power nodes being separate from the readers and spaced apart within the area, each power node being capable of sending a power frequency RF signal that can power up RFID tags within a transmit distance of the power node,whereby tags can be powered up to be read from positions generally more distant from a particular reader than possible if a powering signal were sent by the particular reader itself.

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