Relaying apparatus and communication system

  • US 20050125093A1
  • Filed: 09/21/2004
  • Published: 06/09/2005
  • Est. Priority Date: 10/01/2003
  • Status: Active Grant
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First Claim
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1. A relaying apparatus for relaying wireless communication of the electromagnetic coupling system, mediated by a carrier wave of a preset frequency, between an information read/write device and a non-contact information medium, said relaying apparatus comprising a first antenna coil electromagnetically coupled to an antenna coil of said information read/write device;

  • a second antenna coil, connected in series with said first antenna coil and electromagnetically coupled with an antenna coil of said non-contact information medium; and

    a tuning capacitor connected in series with said first antenna coil and with said second antenna coil;

    said first antenna coil, second antenna coil and the tuning capacitor forming a resonance circuit resonated at the resonance frequency which is the same as the resonance frequency of a resonance circuit of said read/write device and the resonance frequency of a resonance circuit of said non-contact information medium.

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