Title:
RADIO TAG COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/035598
Kind Code:
A1
Abstract:
There is provided a radio tag communication device capable of realizing communication of high sensitivity not depending on the relative positional relationship with the radio tag. The radio tag communication device includes an antenna (54) formed by a plurality of antenna elements (18) arranged at a predetermined relative positional relationship and capable of controlling polarization plane and directivity of the transmission signal, and a transmission weight control unit (36) for controlling the polarization plane and the directivity of the transmission signal transmitted from the antenna (54). Accordingly, regardless of the relative position of the radio tag (14) as a communication object, it is possible to match the polarization plane and the directivity of the transmission signal with the radio tag (14). That is, it is possible to provide a radio tag communication device (12) capable of realizing communication of high sensitivity not depending on the relative positional relationship with the radio tag (14).
Inventors:
KURAMOTO KATSUYUKI (JP)
Application Number:
PCT/JP2005/016898
Publication Date:
April 06, 2006
Filing Date:
September 14, 2005
Export Citation:
Assignee:
BROTHER IND LTD (JP)
KURAMOTO KATSUYUKI (JP)
KURAMOTO KATSUYUKI (JP)
International Classes:
H04B7/10; H01Q3/26; H01Q9/16; H04B1/59; H04B5/02
Domestic Patent References:
| WO2002051034A1 | 2002-06-27 |
Foreign References:
| JP2004507850A | 2004-03-11 | |||
| JP2002026790A | 2002-01-25 | |||
| JPH1075196A | 1998-03-17 | |||
| JPH0998019A | 1997-04-08 | |||
| JPH088641A | 1996-01-12 | |||
| JP2000124733A | 2000-04-28 | |||
| JPH09153721A | 1997-06-10 |
Attorney, Agent or Firm:
Ikeda, Haruyuki (Nagoya-Dia. Bldg. No.2 15-1, Meieki 3-chome, Nakamura-k, Nagoya-shi Aichi, JP)
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