Title:
ANTENNA DEVICE AND WIRELESS COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/051187
Kind Code:
A1
Abstract:
A radiator (40) is provided with a loop-shaped radiating conductor (1, 2), a capacitor (C1), an inductor (L1), a feed point (P1) provided on the radiating conductor (1), and a magnet block (M1) provided in at least part of the interior of the radiating-conductor loop. When the radiator (40) is excited by a lower resonance frequency (f1), a first current (I1) flows on a first path that runs along the inside of the radiating-conductor loop, including the inductor (L1) and the capacitor (C1), and the magnetic flux induced by the first current (I1) passes through the magnet block (M1), thereby increasing the inductance of the radiating conductor (1, 2). When the radiator (40) is excited by a higher resonance frequency (f2), a second current (I2) flows on a second path that includes a segment between the feed point (P1) and the inductor (L1) along the outside of the radiating-conductor loop, including the capacitor (C1) but not the inductor (L1).
Inventors:
ASANUMA KENICHI
YAMAMOTO ATSUSHI
SAKATA TSUTOMU
YAMAMOTO ATSUSHI
SAKATA TSUTOMU
Application Number:
PCT/JP2012/005535
Publication Date:
April 11, 2013
Filing Date:
August 31, 2012
Export Citation:
Assignee:
PANASONIC CORP (JP)
ASANUMA KENICHI
YAMAMOTO ATSUSHI
SAKATA TSUTOMU
ASANUMA KENICHI
YAMAMOTO ATSUSHI
SAKATA TSUTOMU
International Classes:
H01Q5/10; H01Q7/00; H01Q7/06; H01Q9/16; H01Q9/30
Domestic Patent References:
| WO2010137061A1 | 2010-12-02 |
Foreign References:
| JP2009111999A | 2009-05-21 | |||
| JP2005228785A | 2005-08-25 | |||
| JP2009239463A | 2009-10-15 | |||
| JP2010041359A | 2010-02-18 | |||
| JP2009206847A | 2009-09-10 |
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
Mutsumi Sameshima (JP)
Mutsumi Sameshima (JP)
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Claims: