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Tunable antenna circuit, particularly for contactless integrated circuit reader

  • US 20050219132A1
  • Filed: 05/06/2005
  • Published: 10/06/2005
  • Est. Priority Date: 11/12/2002
  • Status: Active Grant
First Claim
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1. An antenna circuit tunable to a determined resonance frequency, comprising an antenna coil and adjustable components, the antenna circuit comprising a filter that is an integral part of the antenna circuit and that has at least one voltage tap point to tap an electric voltage the amplitude of which forms a pertinent indication for tuning the antenna circuit.

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