| 摘要 |
In a RFID tag (11), antenna wires (14a, 14b) are embedded in a thin plate (12) made of a resin. The antenna wires (14a, 14b) configure, for example, a dipole antenna. In the thin plate (12), a radio wave reflecting material (15a, 15b, 15c, 15d) which is made of a metal and extends parallel to the antenna wires (14a, 14b) is further embedded. Radio waves entering toward the thin plate (12) are reflected by the radio wave reflecting material (15a, 15b, 15c, 15d). The reflected radio waves are guided to the antenna wires (14a, 14b). A reception quantity of the radio waves increases at the antenna wires (14a, 14b). The RFID tag remarkably contributes to increase of a communication distance. Since the radio wave reflecting material (15a, 15b, 15c, 15d) is embedded in the thin plate (12), the conventional application can be ensured. When a reflecting plate is attached to the external side of the RFID tag, the application of the RFID tag is greatly limited. |
