Title:
ANTENNA STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2013/014958
Kind Code:
A1
Abstract:
[Problem] The purpose of the present invention is to provide an antenna structure for short-distance wireless communications not readily affected by antenna location or usage environment conditions, etc., in contrast to conventional antenna structures that have used magnetic sheets and have not been designed to improve antenna sensitivity. [Solution] An antenna structure that sends and receives signals for short-distance wireless communications and comprising: an antenna (3) having a conductor (2) formed in a spiral wound shape on a plane; and a magnetic sheet (5) having a flat powder magnetic body oriented in a desired direction. The antenna structure is characterized by: overlapping the antenna (3) and the magnetic sheet (5); and having the orientation of the magnetic sheet (5) preferentially oriented in the surface direction of the plane in a region wherein the antenna (3) and the magnetic sheet (5) overlap and preferentially oriented in the direction orthogonal to the plane in at least part of the region further on the outside than the antenna (3).
Inventors:
ISHIGAKI ISAO (JP)
Application Number:
PCT/JP2012/053432
Publication Date:
January 31, 2013
Filing Date:
February 14, 2012
Export Citation:
Assignee:
ALPS ELECTRIC CO LTD (JP)
ISHIGAKI ISAO (JP)
ISHIGAKI ISAO (JP)
International Classes:
H01Q7/06; H01Q1/38
Foreign References:
| JP2005269599A | 2005-09-29 | |||
| JPH07318768A | 1995-12-08 | |||
| JP2005080023A | 2005-03-24 |
Attorney, Agent or Firm:
NOZAKI, Teruo et al. (JP)
Teruo Nozaki (JP)
Teruo Nozaki (JP)
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Claims: