Title:
PRODUCTION METHOD FOR ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/013661
Kind Code:
A1
Abstract:
Disclosed is a production method for an antenna device that is capable of stably communicating and also capable of adjusting, within a correction range, frequency drift caused by variation factors in the circuit characteristics of an antenna module after production. An antenna circuit (11) comprises: an antenna coil (11a) for receiving a magnetic field transmitted from a reader/writer (2); and a capacitor (11b) that is electrically connected to the antenna coil (11a). The disclosed method comprises: a first step (S11) for creating the antenna circuit (11) in such a way that the resonance frequency of the antenna circuit (11) is lower than the oscillation frequency of the reader/writer (2); and a second step for adhering a magnetic sheet (12), which is positioned so as to be superimposed on the antenna coil (11a) and which changes the inductance of the antenna coil (11a), onto the antenna coil (11a), by means of a film thickness adhesive agent (14), which changes the inductance of the antenna coil (11a), according to the separation distance between the antenna coil (11a) and the magnetic sheet (12), so that the resonance frequency of the antenna circuit (11) matches the oscillation frequency.
Inventors:
ORIHARA KATSUHISA (JP)
SUGITA SATORU (JP)
SAITO NORIO (JP)
KANNO MASAYOSHI (JP)
SUGITA SATORU (JP)
SAITO NORIO (JP)
KANNO MASAYOSHI (JP)
Application Number:
PCT/JP2010/062617
Publication Date:
February 03, 2011
Filing Date:
July 27, 2010
Export Citation:
Assignee:
SONY CHEM & INF DEVICE CORP (JP)
ORIHARA KATSUHISA (JP)
SUGITA SATORU (JP)
SAITO NORIO (JP)
KANNO MASAYOSHI (JP)
ORIHARA KATSUHISA (JP)
SUGITA SATORU (JP)
SAITO NORIO (JP)
KANNO MASAYOSHI (JP)
International Classes:
H01Q7/06; H01P11/00; H01Q1/24
Domestic Patent References:
| WO2008105477A1 | 2008-09-04 |
Foreign References:
| JP2003188765A | 2003-07-04 | |||
| JP2005210223A | 2005-08-04 | |||
| JP2008109212A | 2008-05-08 | |||
| JP2009175750A | 2009-08-06 | |||
| JP2009111483A | 2009-05-21 |
Other References:
See also references of EP 2461424A4
Attorney, Agent or Firm:
KOIKE, Akira et al. (JP)
Akira Koike (JP)
Akira Koike (JP)
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