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Antenna device and wireless communication apparatus

  • US 7,466,277 B2
  • Filed: 12/12/2007
  • Issued: 12/16/2008
  • Est. Priority Date: 06/17/2005
  • Status: Active Grant
First Claim
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1. An antenna device comprising:

  • a first chip antenna including a first radiation electrode and a frequency variable circuit arranged to vary an electrical length of the first radiation electrode provided on a dielectric or magnetic base mounted on an upper side of a non-ground region of a substrate;

    at least one antenna element including an additional radiation electrode provided on the base of the first chip antenna and an auxiliary element disposed on the upper side or an underside of the non-ground region and connected to the additional radiation electrode, and having a predetermined electrical length; and

    a second chip antenna including a second radiation electrode disposed on the dielectric or magnetic base mounted on the upper side or underside of the non-ground region of the substrate, and having a predetermined electrical length.

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