Ring antennas for resonant circuits

  • US 5,864,323 A
  • Filed: 12/19/1996
  • Issued: 01/26/1999
  • Est. Priority Date: 12/22/1995
  • Status: Expired due to Fees
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First Claim
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1. A ring antenna for a resonant circuit for mounting on or around an object comprising:

  • a core ring having a first core surface and a second core surface wherein said core ring is made from a ferromagnetic material;

    a wire coil including wire made from an electrically conductive material; and

    a shield made from a non-magnetic material, affixed to said second core surface thereby separating said core from a surface of said object, and wherein said shield is separated from said first core surface by an air gap.

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