Title:
ANTENNA DEVICE AND COMMUNICATIONS APPARATUS
Document Type and Number:
WIPO Patent Application WO/2015/147132
Kind Code:
A1
Abstract:
An antenna device (101) comprising: a power supply coil connected to an RFIC (4); and a coil antenna (3) that joins to the power supply coil. The power supply coil comprises a first power supply coil (1) and a second power supply coil (2) connected to the first power supply coil (1). The second power supply coil (2) has a coil opening (CA2) that expands in a planar shape. The coil antenna (3) has a coil opening (CA3) that expands in a planar shape along the same surface as, or a surface parallel to, the coil opening (CA2) of the second power supply coil (2). In the planar view, the center of gravity of the coil antenna (3) is positioned inside the coil opening (CA2) of the second power supply coil (2), the winding axis direction of the first power supply coil (1) intersects the winding axis direction of the coil antenna (3), and the first power supply coil (1) and the second power supply coil (2) are magnetic-field coupled to the coil antenna (3).
Inventors:
TENNO NOBUYUKI (JP)
Application Number:
PCT/JP2015/059304
Publication Date:
October 01, 2015
Filing Date:
March 26, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q7/00; G06K19/077; H04B5/02
Foreign References:
| JP2013168756A | 2013-08-29 | |||
| JP2008226070A | 2008-09-25 | |||
| JP2008167190A | 2008-07-17 | |||
| JP2008197714A | 2008-08-28 | |||
| JP2005352858A | 2005-12-22 | |||
| JP2008067057A | 2008-03-21 | |||
| JP2008129850A | 2008-06-05 |
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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