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Trap microstrip PIFA

  • US 6,380,895 B1
  • Filed: 04/06/2000
  • Issued: 04/30/2002
  • Est. Priority Date: 07/09/1997
  • Status: Expired due to Fees
First Claim
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1. A microstrip antenna structure for receiving and transmitting radio frequency signals in at least two frequency bands, comprising:

  • a ground plane means, at least a first feeding means and, N radiating elements where N is an integer number greater than zero, said microstrip antenna structure having a first conductive patch, said feeding means being arranged for feeding radio frequency signals to the first patch, at least a first of the N radiating elements having a second patch, inductive means for inductively coupling the second patch to said first patch and, said second patch having a free end.

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