| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a portable RFID-tag reader which communicates with a desired RFID-tag even when a plurality of RFID-tags exist in a service area and prevents increase in size. <P>SOLUTION: In the portable RFID-tag reader, the intersecting angle made by a transmitting antenna 7 and a receiving antenna 8 is variable. The directivities of both antennas intersect by varying the intersecting angle and the range of the intersecting directivities varies. Therefore, the communication with the RFID-tag is established by moving both antennas 7, 8 so that the directivities of them are within the range. <P>COPYRIGHT: (C)2009,JPO&INPIT |
