Title:
COIL DEVICE AND MOBILE WIRELESS TERMINAL
Document Type and Number:
WIPO Patent Application WO/2013/157191
Kind Code:
A1
Abstract:
The device is provided with: a first loop coil (2) operating in a first frequency band (f1); and a second loop coil (4) operating in a second frequency band (f2); the first loop coil (2) being electrically connected to an impedance adjustment circuit (3), and the impedance adjustment circuit (3) being configured to have lower impedance in the second frequency band (f2) than in the a first frequency band (f1), for the first loop coil (2). Thus, when the second loop coil (4) is used, degradation in coupling with respect to the first loop coil (2) is reduced, and degradation in performance of the second loop coil (4) can be kept to a minimum.
Inventors:
HIROBE TAKANORI
SATOU HIROSHI
KOYANAGI YOSHIO
UEJIMA HIROYUKI
SATOU HIROSHI
KOYANAGI YOSHIO
UEJIMA HIROYUKI
Application Number:
PCT/JP2013/001619
Publication Date:
October 24, 2013
Filing Date:
March 12, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
H01Q1/52; H01Q1/24; H01Q7/00; H02J17/00
Foreign References:
| JPH09326736A | 1997-12-16 | |||
| JP2012019302A | 2012-01-26 |
Attorney, Agent or Firm:
HASHIMOTO, Kimihide et al. (JP)
Kimihide Hashimoto (JP)
Kimihide Hashimoto (JP)
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