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RFID tag using a surface insensitive antenna structure

  • US 7,501,984 B2
  • Filed: 10/06/2005
  • Issued: 03/10/2009
  • Est. Priority Date: 11/04/2003
  • Status: Active Grant
First Claim
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1. An RFID device comprising:

  • an expandable substrate; and

    an antenna structure on one face of the substrate;

    wherein expandable substrate may be selectively expanded from a compressed state to an expanded state, increasing thickness of the expandable substrate by at least 50%.

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