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Multiple resonance antenna and mobile phone antenna

  • US 7,023,388 B2
  • Filed: 05/26/2003
  • Issued: 04/04/2006
  • Est. Priority Date: 06/10/2002
  • Status: Expired due to Fees
First Claim
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1. A multiple resonance antenna comprising an insulating antenna bobbin with a lower part and upper part and with an inner circumferential surface and an outer circumferential surface;

  • which has a pattern of an element that resonates in a plurality of frequency bands formed on the outer circumferential surface of the insulating antenna bobbin; and

    a conductive parasitic conductor with an inner circumferential surface and an outer circumferential surface which is inserted into an accommodating hole formed by the inner circumferential surface of the insulating antenna bobbin, which is substantially along the central axis of the insulating antenna bobbin, and the lower part of the insulating antenna bobbin is engaged with a conductive antenna holder, the antenna holder and the element are electrically connected, and an insulating cap part that covers the insulating antenna bobbin is mounted on the upper part of the antenna holder.

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