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Detacher system and method having an RFID antenna for a combination EAS and RFID tag

  • US 7,973,661 B2
  • Filed: 03/06/2008
  • Issued: 07/05/2011
  • Est. Priority Date: 03/06/2008
  • Status: Active Grant
First Claim
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1. A detaching unit for detaching a combination electronic article surveillance/radio frequency identification tag that is affixed to an article by a spring clamp mechanism, the tag having a tag magnetic loop antenna, the detaching unit comprising:

  • a placement region for receiving the electronic article surveillance/radio frequency identification tag;

    a near field magnetic loop antenna situated proximate the placement region, the near field magnetic loop antenna magnetically coupling to the tag magnetic loop antenna, the near field magnetic loop antenna is substantially circular, includes a substrate material having a relative dielectric constant, and has a diameter “

    d”

    in which

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