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Title:
ANTENNA DEVICE
Document Type and Number:
Japanese Patent JP2008109220
Kind Code:
A
Abstract:

To provide an antenna device which is made compact.

The antenna device 100 includes: a dielectric substrate 120; a conductive layer 140 formed by providing a plurality of spiral slots 144 (146, 148) to a flat plate type conductive member 142 disposed on one surface of the dielectric substrate 120 so that one antenna axis 102 is shared; and a feed pattern 160 disposed on the backside of a conductive layer arrangement surface of the dielectric substrate 120 and feeding the slots 144. In the plane direction of the conductive layer 160, the feed pattern 160 is provided overlapping with portions 146b and 148b of the plurality of slots 144 nearby outer-peripheral side ends, and the conductive member 142 has its inner-peripheral part 142b for the slot 144 and its outer-peripheral part 142a for the slot 144 electrically connected by a connection pattern 172 different from the conductive member 142.


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Inventors:
Fukui, Shinji
Fujita, Mitsuru
Application Number:
JP2006000287851
Publication Date:
May 08, 2008
Filing Date:
October 23, 2006
Export Citation:
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Assignee:
NIPPON SOKEN INC
DENSO CORP
International Classes:
H01Q13/10; H01Q17/00; H01Q19/10; H01Q21/26; H01Q21/30
Domestic Patent References:
JP2002330024A
JP2003507915A
JPH09232864A
JP2005209323A
JP2002530982A
Foreign References:
US6466177B1
Attorney, Agent or Firm:
矢作 和行
野々部 泰平



 
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