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Tuneable wireless tags using spatially inhomogeneous structures

  • US 20040134991A1
  • Filed: 09/03/2003
  • Published: 07/15/2004
  • Est. Priority Date: 09/03/2002
  • Status: Active Grant
First Claim
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1. A device responsive to a wireless electromagnetic interrogation signal and having a plurality of non-equivalent interacting current pathways representing multi-bit information, each of the pathways responding differently to the interrogation signal and the responses contributing to the provision of the multi-bit information, wherein at least one of the pathways is altered to encode the represented multi-bit information.

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