Title:
ANTENNA DEVICE, ANTENNA DRIVING METHOD AND ID TAG READER
Document Type and Number:
WIPO Patent Application WO/2006/080300
Kind Code:
A1
Abstract:
An antenna device for more surely detecting a plurality of ID tags near the center of a long and thin space, an antenna driving method and an ID tag reader are provided. The antenna device is provided with facing antennas (13, 14), which are two loop antennas arranged to face each other, a resonant antenna circuit (15) which is arranged between the facing antennas and is provided with a loop antenna configuring a resonant circuit, and an antenna driving circuit (10) for driving the facing antennas. Alternatively, the antenna device is provided with a plurality of loop antennas arranged on every two facing rectangular parallelepiped faces, and an antenna driving circuit for driving each antenna in a desired phase so that a magnetic flux having a component parallel to facing two planes at the center part of the rectangular parallelepiped is generated. Since sufficient power is supplied to an ID tag even near a shelf (12), ID information can be detected at a higher accuracy.
More Like This:
Inventors:
TAKANO TAKASHI (JP)
Application Number:
PCT/JP2006/301031
Publication Date:
August 03, 2006
Filing Date:
January 24, 2006
Export Citation:
Assignee:
CENTRAL ENGINEERING CO LTD (JP)
TAKANO TAKASHI (JP)
TAKANO TAKASHI (JP)
International Classes:
H01Q3/24; G06K7/10; G06K17/00; G06K19/07; H01Q1/22; H01Q3/44; H01Q7/00; H04B1/3822; H04B1/40; H04B1/59; H04B5/02
Foreign References:
| JP2004241929A | 2004-08-26 | |||
| JP3611192B2 | 2005-01-19 | |||
| JP2001225921A | 2001-08-21 | |||
| JP2002056361A | 2002-02-20 | |||
| JP2002074278A | 2002-03-15 | |||
| JP2001184467A | 2001-07-06 | |||
| JPH10200452A | 1998-07-31 | |||
| JP2004088346A | 2004-03-18 | |||
| JP2004310293A | 2004-11-04 | |||
| JP2001156525A | 2001-06-08 | |||
| JPH0721479A | 1995-01-24 |
Attorney, Agent or Firm:
Kubota, Naoki c/o Kubota, Tokkyo-jimusyo (3101-10 Okura-mach, Machida-shi Tokyo 62, JP)
Download PDF: