Title:
ANTENNA COIL
Document Type and Number:
WIPO Patent Application WO/2008/072496
Kind Code:
A1
Abstract:
An antenna coil (100) is provided with a coil body (104) composed of a magnetic
core (106), a bobbin (108) surrounding the magnetic core (106), and a coil (110)
wound on the bobbin; and a case (102) storing the coil body (104). A foam body (122)
is arranged in a gap between the coil body (104) and the case (102). The foam body
(122) is compressed to 45-65% by having the thickness in unloaded status as a reference.
Such configuration prevents the magnetic core (106) from breaking, and the
antenna coil suitable for a short-distance communication system in a LF band
is provided.
Inventors:
SAKO YOSHIHIRO (JP)
NAITO KENJI (JP)
OOI TAKAAKI (JP)
NAITO KENJI (JP)
OOI TAKAAKI (JP)
Application Number:
PCT/JP2007/073301
Publication Date:
June 19, 2008
Filing Date:
December 03, 2007
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
SAKO YOSHIHIRO (JP)
NAITO KENJI (JP)
OOI TAKAAKI (JP)
SAKO YOSHIHIRO (JP)
NAITO KENJI (JP)
OOI TAKAAKI (JP)
International Classes:
H01Q7/06; H01Q1/24
Domestic Patent References:
| WO2007015344A1 | 2007-02-08 |
Foreign References:
| JPH05331364A | 1993-12-14 |
Attorney, Agent or Firm:
KOMORI, Hisao (Noninbashi Chuo-k, Osaka-shi Osaka 11, JP)
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