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DUAL-BAND INVERTED-F ANTENNA WITH A BRANCH LINE SHORTING STRIP

  • US 20060145924A1
  • Filed: 04/25/2005
  • Published: 07/06/2006
  • Est. Priority Date: 12/31/2004
  • Status: Active Grant
First Claim
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1. A dual-band inverted-F antenna comprising:

  • a primary radiating member comprising a first metallic strip, a second metallic strip integrally formed with the first metallic strip, a feeding point on the second metallic strip, and a first shorting point on the second metallic strip wherein a first current path is created in the first metallic strip such that the antenna is adapted to operate in a first low frequency operating mode, and a second current path shorter than the first current path is created in the second metallic strip such that the antenna is adapted to operate in a second high frequency operating mode;

    a secondary radiating member for increasing an operating frequency of the antenna when the antenna operates in the second high frequency operating mode, the secondary radiating member comprising a second shorting point;

    a ground surface;

    a dielectric substrate;

    a branch line shorting strip having one end electrically connected to the ground surface, and a bifurcation distal its one end, the bifurcation including a first branch electrically connected to the first shorting point and a second branch electrically connected to the second shorting point; and

    a feeding member formed of a metallic strip having one end electrically connected to the feeding point and the other end electrically connected to a system signal source for sending and receiving electromagnetic waves.

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