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NFC antenna using dual resonance technical field

  • US 9,406,997 B2
  • Filed: 05/23/2014
  • Issued: 08/02/2016
  • Est. Priority Date: 06/10/2009
  • Status: Active Grant
First Claim
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1. A case configured to be attachable to and detachable from a portable wireless terminal, the case having an inner surface and an outer surface and comprising a relay unit attached to the inner surface or the outer surface of the case,wherein the relay unit comprises a closed circuit with a loop antenna configured to provide a resonance to relay transmission signals of an external reader and an attached NFC antenna unit on an inner substrate of the portable wireless terminal.

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