| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a non-electric source RF tag capable of obtaining information even at the far distance. <P>SOLUTION: In (a), an interrogator 200 comprises a transmission and receiving part 210 and a light emission part 220 for emitting invisible light of acute directivity. A tag 300 is irradiated with an invisible laser or a light with acute directivity which an LED has. The tag 300 receives the lights at a light receiving part 320 to convert them into electric energy and operates the transmission and receiving part 310 with that energy as an energy source. Then, a radio wave transmitted by the interrogator 200 is modulated by information which the transmission and receiving part 310 of the tag 300 has is transmitted to the interrogator side as the radio wave. In the construction of (b), the tag 300 which has received the visible light from the interrogator 200 converts the light received by the light receiving part 320 into the electric energy. Using the power, a microwave is generated by a transmission part 330 on the tag 300 side, modulated by data, and transmitted to the interrogator 200. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
