Title:
ANTENNA DEVICE AND ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/044896
Kind Code:
A1
Abstract:
Provided is an antenna device with which it is possible to improve the coupling coefficient of magnetic field coupling between a feed coil and a planar coil. The antenna device is provided with a planar coil, a feed coil, and a magnetic body. The planar coil includes a conductor portion including a first coil conductor portion and a second coil conductor portion. The feed coil is coupled with the planar coil via magnetic field coupling. The feed coil has a winding axis intersecting a winding axis direction of the planar coil and intersecting an extending direction of the conductor portion. In a plan view of the planar coil, the first coil conductor portion overlaps the feed coil, and the second coil conductor portion does not overlap the feed coil. The magnetic body is disposed on the side of the first coil conductor portion opposite to the feed coil. In the winding axis direction of the feed coil, the coil length of the feed coil is less than the width of the second coil conductor portion. The width of the first coil conductor portion is less than the width of the second coil conductor portion.
Inventors:
KUBO HIROYUKI
Application Number:
PCT/JP2019/029305
Publication Date:
March 05, 2020
Filing Date:
July 25, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q7/00; H01Q1/24; H04B5/02
Domestic Patent References:
| WO2014054747A1 | 2014-04-10 | |||
| WO2013183552A1 | 2013-12-12 |
Foreign References:
| JP2001351084A | 2001-12-21 | |||
| JP2001319207A | 2001-11-16 | |||
| JP2013146050A | 2013-07-25 | |||
| JP2018011353A | 2018-01-18 | |||
| JP2014154896A | 2014-08-25 | |||
| JP2013243566A | 2013-12-05 |
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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