| 摘要 |
PROBLEM TO BE SOLVED: To provide radio communication equipment in which loss caused at composing received signals received respectively by a plurality of antenna elements is reduced to the utmost extent. SOLUTION: An array antenna 18 in radio tag communication equipment 12 or the like comprises the plurality of antenna elements 26, and the radio tag communication equipment 12 is provided with, in accordance with the respective antenna elements 26, cancel circuits 66 for suppressing sneak path signals from a transmission side included in the received signals from the antenna elements 26 and reception amplifiers 62 for amplifying the received signals to which the cancel circuit 66 are applied, and the radio tag communication equipment 12 is further provided with a received signal composite section 28 for composing output signals from the reception amplifiers 62, and since the cancel circuit 26 is provided for each of the antenna elements 26, the reception amplifier 26 can be provided in accordance with each antenna element 26, with the result that loss in the received signal composite section 28 can sufficiently be reduced. COPYRIGHT: (C)2008,JPO&INPIT
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