| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication apparatus capable of stabilizing a communication between the communication apparatus with a reader/writer function and an information processing terminal, on which a non-contact type IC chip is mounted, and to provide a tuning frequency adjustment method and a program. <P>SOLUTION: The communication apparatus capable of performing a non-contact communication with the information processing terminal, on which the IC chip is mounted, by transmitting carrier signals and performing a load modulation by the IC chip received with the carrier signals comprises: a reference clock generation part for generating the reference clock signals of a fixed cycle; a communication antenna for transmitting the carrier signals of a prescribed frequency corresponding to the reference clock signals, resonating response signals corresponding to the load modulation by a prescribed tuning frequency and receiving them; and a tuning frequency control part for adjusting the prescribed tuning frequency of the communication antenna on the basis of the phase change to the reference clock signals of the carrier signals in the communication antenna. <P>COPYRIGHT: (C)2009,JPO&INPIT |
