Title:
ANTENNA DEVICE AND ELECTRONIC APPARATUS
Document Type and Number:
Japanese Patent JP2019054336
Kind Code:
A
Abstract:
To suppress a situation in which magnetic fluxes for communication in a first frequency band affect communication in a second frequency band.SOLUTION: In an antenna device 1, a first coil antenna 6 has a first opening 61 and is arranged on a side of a first main surface 51 of a first magnetic body 5 to perform communication in a first frequency band. A second coil antenna 7 has a second opening 71 and is arranged on a side of a second main surface 52 of the first magnetic body 5 to perform communication in a second frequency band. The second opening 71 of the second coil antenna 7 is overlapped with the first magnetic body 5 in plan view from a first direction D1 where the first main surface 51 and the second main surface 52 oppose each other, and is not overlapped with the opening 61 of the first coil antenna 6. A magnetic permeability of the first magnetic body 5 in the first frequency band is higher than a magnetic permeability of the first magnetic body 5 in the second frequency band.SELECTED DRAWING: Figure 1
Inventors:
KUBO HIROYUKI
Application Number:
JP2017175730A
Publication Date:
April 04, 2019
Filing Date:
September 13, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO
International Classes:
H01Q1/52; H01Q7/06; H02J7/00; H02J50/12; H02J50/70; H04B5/02
Attorney, Agent or Firm:
Patent business corporation Hokuto patent office