Radio Frequency Identification Tag for Use on Metal Objects
First Claim
Patent Images
1. An RFID tag comprising:
- a magnetic core;
a wire wrapped around said core;
an integrated circuit connected to said wire;
a metal sleeve having an open first end and an open second end opposing said first end, said sleeve further having at least one impediment to the flow of eddy currents formed between said first and said second ends; and
an encapsulating material for fixing said wire wrapped core and said circuit within said sleeve.
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Abstract
An RFID tag comprises a magnetic core, a wire wrapped around the core, and an integrated circuit electrically connected to the wire. A metal sleeve has an open first end and an open second end opposing the first end. The sleeve further has at least one impediment to the flow of eddy currents, such as a slit, formed between the first and the second ends. An encapsulating/potting material is used to fix the wire wrapped core and the circuit within the sleeve. A method of making such an RFID tag is also disclosed.
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Citations
23 Claims
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1. An RFID tag comprising:
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a magnetic core; a wire wrapped around said core; an integrated circuit connected to said wire; a metal sleeve having an open first end and an open second end opposing said first end, said sleeve further having at least one impediment to the flow of eddy currents formed between said first and said second ends; and an encapsulating material for fixing said wire wrapped core and said circuit within said sleeve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19)
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12. An RFID tag comprising:
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a ferrite core defining a longitudinal axis; a wire wrapped around said core; an integrated circuit electrically connected to said wire; a metal sleeve having an open first end and an open second positioned at opposing ends of said longitudinal axis, said sleeve further having at least one slit extending from said first end to said second end; and an encapsulating material for fixing said wire wrapped core and said circuit within said sleeve. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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20. A tag comprising:
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a magnetic core; a wire wrapped around said core; a metal sleeve having an open first end and an open second end opposing said first end, said sleeve further having at least one impediment to the flow of eddy currents formed between said first and said second ends; and an encapsulating material for fixing said wire wrapped core and said circuit within said sleeve.
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21. A method of constructing an RFID tag, comprising:
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winding a wire about a core; connecting an integrated circuit to said wire; inserting said wire wound core and circuit into a metallic sleeve having open opposing ends and at least one impediment to the flow of eddy currents formed between said open opposing ends; and fixing the wire wound core and circuit within the metallic sleeve. - View Dependent Claims (22, 23)
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Specification