| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily perform an adjustment of the fluctuation of the ambient environment of a loop antenna and an adjustment at installation of the loop antenna by measuring the intensity of an induced AC electromagnetic field which the loop antenna generates. <P>SOLUTION: This non-contact reader is constituted of: a loop antenna 1; an AC power amplifier part 3; a power control part 4; a central control part 5; a sense coil 2 arranged in the direction crossing approximately perpendicularly the radiation direction of an induced electromagnetic field which is generated from the loop antenna 1 in the vicinity of the loop antenna 1; and an indicator part 6 utilizing induced AC power which is generated at both ends of the sense coil 2, or a sense circuit 15 which performs voltage conversion of the induced AC power. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
