| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibited effectively generating of a null state whose transmission disabled in an approached state, when performing radio communication with a reader/writer in a noncontact manner. <P>SOLUTION: It has a radio tag as a radio communications apparatus which performs a short range radio transmission with the reader/writer, or a presumed means 15 to presume a metric with the reader/writer in a mobile terminal apparatus with which the radio tag function was built in, and a frequency-shifting means 17, to which frequency tuned with an tuning means 12 in the radio communications apparatus, is shifted according to the metric presumed with the presumed means 15. When the metric with the reader/writer approaches very much, the tuning frequency is shifted, and the occurrence of the null state occurring is avoided. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
