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Microstrip antenna for RFID device having both far-field and near-field functionality

  • US 8,970,378 B2
  • Filed: 09/12/2013
  • Issued: 03/03/2015
  • Est. Priority Date: 12/14/2005
  • Status: Active Grant
First Claim
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1. A radio frequency transponder comprising:

  • an antenna providing electromagnetic coupling for far-field operation, and thereby acting as a far-field antenna;

    a ground plane;

    a dielectric substrate interposed between the ground plane and the antennaan integrated circuit; and

    a matching circuit coupling the antenna with the integrated circuit, the matching circuit including a circuit loop providing inductive coupling for near-field operation, and thereby acting as a near-field antenna.

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