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Title:
ANTENNA DEVICE AND COMMUNICATION TERMINAL APPARATUS
Document Type and Number:
WIPO Patent Application WO/2016/132654
Kind Code:
A1
Abstract:
An antenna device (101) is provided with a feed coil (31) and a ring-shaped conductor (1) disposed around an axis (AX). The ring-shaped conductor (1) has a first edge portion (11) and a second edge portion (12) in an axial direction, and has an opening portion (2) formed inward from the first edge portion (11). At least part of the opening portion (2) overlaps a coil opening of the feed coil (31) when viewed from a radial direction. The feed coil (31) is electrically coupled, magnetically coupled or electromagnetically coupled with the opening portion (2). This configuration allows the ring-shaped conductor (1) to function as a booster antenna for the feed coil (31). Consequently, compared with when only the feed coil (31) is provided, a practical coil opening functioning as an antenna becomes larger, and coupling with a communication partner-side antenna coil becomes easier.

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Inventors:
TOKUNAGA TSUYOSHI (JP)
WANG JIAN (JP)
Application Number:
PCT/JP2015/086170
Publication Date:
August 25, 2016
Filing Date:
December 25, 2015
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q7/00; G06K19/077
Domestic Patent References:
WO2009142114A12009-11-26
Foreign References:
JP2013162195A2013-08-19
JP2008036350A2008-02-21
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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