Title:
ANTENNA DEVICE AND COMMUNICATION-TERMINAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/199861
Kind Code:
A1
Abstract:
This antenna device is provided with the following: two conducting surfaces (11, 12) laid out so as to face each other with a space therebetween; connecting conductors (21, 22) that connect said conducting surfaces (11, 12) to each other at at least two points, respectively; and an antenna coil (30) laid out so as to be adjacent to one of said connecting conductors (21). The two connecting conductors (21, 22) and the two conducting surfaces (11, 12) form a closed loop with an opening therethrough. The antenna coil (30) is positioned so as not to overlap the opening in the closed loop in a planar view of said opening and is also positioned so as to electromagnetically induce an induced current to flow in the abovementioned connecting conductor (21). This makes it possible to use conducting surfaces such as metal plates as radiating elements without providing slits or openings therein, avoiding the problems of reduced mechanical strength, design constraints, and a reduced electric-field shielding effect.
Inventors:
KATO NOBORU (JP)
Application Number:
PCT/JP2014/064665
Publication Date:
December 18, 2014
Filing Date:
June 03, 2014
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q7/00; H01Q1/24
Domestic Patent References:
| WO2012173080A1 | 2012-12-20 |
Foreign References:
| JPH11112226A | 1999-04-23 | |||
| JP2013055637A | 2013-03-21 | |||
| JP5532191B1 | 2014-06-25 | |||
| JP4993045B2 | 2012-08-08 |
Other References:
See also references of EP 2897221A4
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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