| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the cost of construction work and cables. <P>SOLUTION: Antenna branch parts 4 are serially connected via an antenna cable 3 to an RFID reader/writer body 2, and an antenna 5 is installed in each of the antenna branch parts, and a radio signal and an antenna selection signal, generated by the RFID reader/writer body 2, are successively transmitted to the antenna branch parts 4. When the an antenna selection signal is transmitted to the antenna branch part 4, to which the selected antenna 5 is connected, circuit is connected to the antenna 5. <P>COPYRIGHT: (C)2008,JPO&INPIT |
