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RFID booster antennas, antenna modules, and increasing coupling

  • US 8,708,240 B2
  • Filed: 06/29/2013
  • Issued: 04/29/2014
  • Est. Priority Date: 08/12/2010
  • Status: Active Grant
First Claim
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1. A transponder comprising:

  • a booster antenna comprising a first antenna structure in the form of a flat coil having a number of turns, an outer end and an inner end, and a second antenna structure in the form of a flat coil having a number of turns, an outer end and an inner end;

    the inner end of the second antenna structure is connected with the outer end of the first antenna structure; and

    the outer end of the second antenna structure and the inner end of the first antenna structure are left unconnected.

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