Title:
ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/210784
Kind Code:
A1
Abstract:
This antenna device comprises: a substrate; a coil antenna; and a resonance circuit. The substrate has a planar conductive part. An opening and a slit are formed in the conductive part. The slit is connected to the opening. The coil antenna is mounted on the substrate so as to at least partially overlap the opening when seen from a vertical direction orthogonal to the substrate. The coil antenna is provided with a coil and a magnetic core. The magnetic core partially forms a magnetic path of the coil. The magnetic core is positioned in a region excluding a specific region directly below the coil. The magnetic core has at least a center core. The center core is at least partially positioned on the inner side of the coil.
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Inventors:
TAMASHIRO KATSUAKI (JP)
HOSHI NORIMITSU (JP)
OKA TOSHIAKI (JP)
HOSHI NORIMITSU (JP)
OKA TOSHIAKI (JP)
Application Number:
PCT/JP2023/016764
Publication Date:
November 02, 2023
Filing Date:
April 27, 2023
Export Citation:
Assignee:
TOKIN CORP (JP)
International Classes:
H01Q7/06; H01Q19/02
Domestic Patent References:
| WO2013115148A1 | 2013-08-08 | |||
| WO2005017821A1 | 2005-02-24 |
Foreign References:
| JP2014075775A | 2014-04-24 | |||
| JPH0289698A | 1990-03-29 |
Attorney, Agent or Firm:
YAMAZAKI Takuya (JP)
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