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Multilayer film element

  • US 9,165,241 B2
  • Filed: 07/30/2014
  • Issued: 10/20/2015
  • Est. Priority Date: 01/05/2009
  • Status: Active Grant
First Claim
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1. A multilayer film element comprising a flexible dielectric carrier layer having a layer thickness of less than 800 μ

  • m, comprising a first electrically conductive layer, in which a first coil-shaped conductor track is shaped in a first region of the film element, comprising a second electrically conductive layer, in which a second coil-shaped conductor track is shaped in the first region, wherein the dielectric carrier layer is arranged between the first and second electrically conductive layers and the first and second conductor tracks overlap at least in regions and are coupled to one another to form an antenna structure, and wherein a first conductor track section comprising at least a three-quarter turn of the first coil-shaped conductor track overlaps at least in regions a second conductor track section comprising at least a three-quarter turn of the second coil-shaped conductor track with respect to a direction perpendicular to the plane spanned by the carrier layer,wherein, in a region comprising t turns of the first conductor track section, the first conductor track section completely overlaps the second conductor track section and in this region along the first conductor track section in at least one first direction, lying in the plane spanned by the carrier layer, the extent of the second conductor track is less than the extent of the first conductor track by the value r, where t≧

    ¼ and

    r≧

    100 μ

    m.

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