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Title:
ELONGATED ANTENNA
Document Type and Number:
WIPO Patent Application WO/2010/023752
Kind Code:
A1
Abstract:
An elongated antenna has a base material, a feeding element and a nonexciting element. The base material is elongated and the permittivity is different in the outer peripheral portion and the central portion. The feeding element is in contact with at least the outer peripheral portion and arranged along the profile of the outer peripheral portion. The nonexciting element is arranged in proximity to the feeding element. The feeding element is thereby arranged in the outer peripheral portion of the base material, i.e. on the outside of the central portion thereof. When the feeding element is arranged along the outer peripheral portion of the elongated base material, the feeding portion approaches the distal end of the feeding element and coupling of electromagnetic field takes place between them. But since the central portion of the base material is dug out suitably and the permittivity is low as compared with the outer peripheral portion, such coupling of electromagnetic field can be suppressed.

Inventors:
SUZUKI MASAMI (JP)
FUJIEDA TOMOYUKI (JP)
Application Number:
PCT/JP2008/065546
Publication Date:
March 04, 2010
Filing Date:
August 29, 2008
Export Citation:
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Assignee:
PIONEER CORP (JP)
SUZUKI MASAMI (JP)
FUJIEDA TOMOYUKI (JP)
International Classes:
H01Q9/26; H01Q1/38; H01Q1/40
Domestic Patent References:
WO2001018909A12001-03-15
Foreign References:
JP2004032776A2004-01-29
JPH0738325A1995-02-07
JPS60129708U1985-08-30
JPS5025785B11975-08-26
JP2002217628A2002-08-02
JP2005303637A2005-10-27
Attorney, Agent or Firm:
NAKAMURA, Toshinobu et al. (JP)
Akinobu Nakamura (JP)
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