| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio tag reader writer which stably reads and/or writes even radio tags in a close state. <P>SOLUTION: The radio tag reader writer is equipped with an antenna and a reflector which is disposed opposite from the antenna in the direction of a radio tag to reflects radio waves that the antenna transmits and receives, and has one or more steps differing in distance from the radio tag. As the number of steps of the reflector is increased, a frequency band in which the radio tag can stably be read and written widens. A movable mechanism which enables the antenna and reflector to move may be further provided to read and write many radio tags in a close state. <P>COPYRIGHT: (C)2008,JPO&INPIT |
