| 摘要 |
<p>[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 (?rx) 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).</p> |
