Title:
ANTENNA APPARATUS AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/022554
Kind Code:
A1
Abstract:
An antenna apparatus (101) is provided with a coil antenna (41) having a coil conductor (31) wound around a winding shaft (AX1), and a planar conductor (11). The coil antenna (41) has a first region (F1) in which the coil conductor (31) overlaps the planar conductor (11), and a second region (F2) in which the coil conductor (31) does not overlap the planar conductor (11), when the planar conductor is viewed in plan view (from the Z direction). The line width (W1) of the coil conductor (31) in the first region (F1) is greater (W1 > W2) than the line width (W2) of a portion (the portion extending in the X direction) of the coil conductor (31) in the second region (F2). Therefore, the inductance per unit length of the coil conductor (31) in the circumferential direction of the first region (F1) is lower than the inductance per unit length of the coil conductor (31) in the second region (F2).
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Inventors:
SHI XIAODONG (JP)
Application Number:
PCT/JP2016/071789
Publication Date:
February 09, 2017
Filing Date:
July 26, 2016
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q7/00; G06K19/077
Domestic Patent References:
| WO2007105606A1 | 2007-09-20 | |||
| WO2010055683A1 | 2010-05-20 | |||
| WO2006134935A1 | 2006-12-21 | |||
| WO2009142114A1 | 2009-11-26 | |||
| WO2011077877A1 | 2011-06-30 | |||
| WO2011062238A1 | 2011-05-26 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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