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Double resonance antenna structure for several frequency ranges

  • US 6,140,966 A
  • Filed: 07/02/1998
  • Issued: 10/31/2000
  • Est. Priority Date: 07/08/1997
  • Status: Expired due to Term
First Claim
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1. An antenna structure for use in a multiband device, comprising a planar antenna element and a ground plane so that the said antenna element is short-circuited to the ground plane at least at one place, characterized in that said antenna element has at least two separate resonance frequencies, and that said antenna element has at least two connection points for connecting feed lines of the antenna, so that the antenna structure works in at least two TX-frequency bands and two RX-frequency bands of at least two wireless systems.

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