Title:
ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/053282
Kind Code:
A1
Abstract:
The present invention provides an antenna device comprising: a single antenna element corresponding to a first usage frequency band and a second usage frequency band that is different from the first usage frequency band; a power feed point for supplying AC power to the antenna element; and a parallel resonance circuit electrically connected between the antenna element and the power feed point. The parallel resonance circuit has impedance that is set so as to indicate induction properties in the first usage frequency band and is set so as to indicate capacitance properties in the second usage frequency band, and return loss in the first and second usage frequency bands is sufficiently small so as to enable wireless communication.
Inventors:
UCHIDA JUN (JP)
Application Number:
PCT/JP2011/069095
Publication Date:
April 26, 2012
Filing Date:
August 18, 2011
Export Citation:
Assignee:
NEC ACCESSTECHNICA LTD (JP)
NEC CASIO MOBILE COMM LTD (JP)
UCHIDA JUN (JP)
NEC CASIO MOBILE COMM LTD (JP)
UCHIDA JUN (JP)
International Classes:
H01Q9/30; H01Q1/24; H01Q5/10; H01Q5/15; H01Q5/335
Domestic Patent References:
| WO2009147885A1 | 2009-12-10 |
Foreign References:
| JP2002076750A | 2002-03-15 | |||
| JPH11195917A | 1999-07-21 | |||
| JP2004142728A | 2004-05-20 | |||
| JP2010010960A | 2010-01-14 | |||
| JP2010236601A | 2010-10-21 |
Other References:
See also references of EP 2631992A4
Attorney, Agent or Firm:
SHIMOSAKA, NAOKI (JP)
Naoki Shimosaka (JP)
Naoki Shimosaka (JP)
Download PDF:
Claims:
Previous Patent: CLUTCH DEVICE
Next Patent: ELECTROPLATING BATH, METHOD FOR FORMING ELECTROPLATING COATING, AND ELECTROPLATED PRODUCT
Next Patent: ELECTROPLATING BATH, METHOD FOR FORMING ELECTROPLATING COATING, AND ELECTROPLATED PRODUCT