| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic antenna and an antenna device that implement high flux radiation efficiency and high sensitivity by ensuring a required number of turns and widening an antenna aperture in the vicinity of a flux transmission surface of a magnetic core. <P>SOLUTION: A flexible substrate 23 is provided with a spiral coil conductor 24 having a conductor aperture CW in a turn center region, and is folded in U shape so as to enclose a magnetic core 22 along lines passing the conductor aperture CW. The magnetic core 22 is disposed with an end face opposite the fold portion of the flexible substrate 23, and is provided with notched portions 22a, 22b spaced from coil conductor portions CC of the fold portion of the flexible substrate 23 in regions of the end face opposite the coil conductor portions CC. <P>COPYRIGHT: (C)2012,JPO&INPIT |
