| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable an interrogator to receive data of a response wave returned from a responder at the same time with writing data of a writing wave to the responder regarding a communication method in a transponder. <P>SOLUTION: This transponder is provided with the interrogator Q which has a transmitting function for transmitting the writing wave S<SB>1</SB>and an interrogation wave S<SB>2</SB>and a receiving function for receiving the returned response wave S<SB>3</SB>, and with the responder R which receives the writing wave S<SB>1</SB>transmitted from the interrogator Q to write data, receives the interrogation wave S<SB>2</SB>to read response data and to apply diffusion modulation and returns the resultant response data as the response wave S<SB>3</SB>to the interrogator Q. In the transponder, the transmitting function of the interrogator Q simultaneously transmits the writing wave S<SB>1</SB>and the interrogation wave S<SB>2</SB>subjected to the same modulation to the responder R, and a means for negating modulation components of the transmitted interrogation wave S<SB>2</SB>about data of the response wave S<SB>3</SB>received by the interrogator Q is provided between the transmitting function side and the receiving function side of the interrogator Q. <P>COPYRIGHT: (C)2004,JPO |
