| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a three-axis antenna which can be arranged even under a metallic roller conveyor and is prevented from the occurrence of eddy current by magnetic flux and is reduced in change of inductance. <P>SOLUTION: The three-axis antenna 1 comprises: an H-shaped core consisting of two vertical magnetic members 10a and 10b arranged opposite to each other and a horizontal magnetic member 9 connecting the opposite faces of the two vertical magnetic members 10a and 10b; an antenna core 11 having bar-like magnetic members 8a and 8b connected to the upper ends 12 of the vertical magnetic members 10a and 10b, respectively; a first loop coil 4 and a second loop coil 5 wound around individual ends 14 of each bar-like magnetic member 8a and 8b; and a third loop coil 6 and a fourth loop coil 7 wound around an appropriate portion of the vertical magnetic members 10a and 10b, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT |
