| 摘要 |
<P>PROBLEM TO BE SOLVED: To supply power stably. <P>SOLUTION: The antenna device comprises: a substrate; a feed line; and an antenna part. The feed line and the antenna part are formed on the substrate. The antenna part includes a coupling part, power supply part and a line. The coupling part is an MSL having a predetermined length of electromagnetic field coupling with the feed line. The power supply part has a spiral shape of feeding power to a wireless tag. The line is an MSL having a predetermined length connecting the coupling part and the power supply part. The sum of the predetermined lengths of the coupling part and the line is determined so as to maximize the electrical field at the joint of the line and the power supply part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
