WIRELESS TAG COMMUNICATION DEVICE

WIPO Patent Application WO/2007/094118

A1

[PROBLEMS] To improve credibility and reliability of information transmission/reception to and from a wireless tag circuit element. [MEANS FOR SOLVING PROBLEMS] A wireless tag communication device is provided with transmitting antenna elements (1B, 1C) for accessing a wireless tag (T) by transmitting a signal at least including a transmission wave without contact; receiving antenna elements (1A, 1D) for receiving a replay signal, corresponding to the signal transmitted from the transmitting antenna elements (1B, 1C) without contact; and high frequency transmitting/receiving sections (34B, 34C), high frequency receiving sections (34A 34D), a reception weight multiplying section (28) and a PAA weight control section (46) for controlling the receiving antenna elements (1A, 1D) so that a reception half value angle (Kr) in reception is smaller than the transmission half value angle (Kt) in transmission by the transmitting antenna elements (1B, 1C) and that a reception main lobe direction (θrx) by the reception antennal elements (1A, 1D) are within a prescribed range in an electric wave reaching range of the transmitting antenna elements (1B, 1C).

KURAMOTO KATSUYUKI (JP)

PCT/JP2006/324704

August 23, 2007

December 11, 2006

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BROTHER IND LTD (JP)
KURAMOTO KATSUYUKI (JP)

G06K17/00; H01Q3/30; H01Q3/34; H04B1/59; H04B5/02; H04B7/08

WO2006013677A1

2006-02-09

JP2002325062A	2002-11-08
JPS53113457A	1978-10-03
JP2003229713A	2003-08-15
JP2003283411A	2003-10-03
JP2002280945A	2002-09-27
JP2001297308A	2001-10-26
JP2005151300A	2005-06-09
JPH05153011A	1993-06-18

MASUDA, Hirofumi (1-7-13 Higashiueno, Taito-k, Tokyo 15 ., JP)

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