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Signal line structure for a radio-frequency identification system

  • US 8,289,163 B2
  • Filed: 09/27/2007
  • Issued: 10/16/2012
  • Est. Priority Date: 09/27/2007
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID)-enabled shelf comprising:

  • a substrate providing a shelf for items having RFID tags; and

    a signal line structure comprising;

    a plurality of signal lines affixed to a first side of the substrate to generate one or more radio frequency (RF) electromagnetic fields for interrogating one or more of the RFID tags, wherein the plurality of signal lines extend longitudinally along the shelf;

    an electrical conductor providing an electrical ground plane on a second side of the substrate opposite the plurality of signal lines, wherein the electrical ground plane extends longitudinally along the length of the substrate; and

    an electrical load coupling at least one of the plurality of signal lines and the ground plane.

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