| 摘要 |
<P>PROBLEM TO BE SOLVED: To raise the sensitivity of an MI magnetometric sensor to be used for an antenna circuit. <P>SOLUTION: The antenna circuit 42 has the MI magnetometric sensor Z1 being a magnetic field detecting means whose electric property changes according to changes in a magnetic field, a high-frequency signal generator S1 for applying a high-frequency signal to the magnetometric sensor Z1, and a detection means for detecting a received signal obtained by the magnetometric sensor Z1. The magnetometric sensor Z1 is composed of a body 102 in a meandrous shape which is made of magnetic thin wire or a thin film of magnetic material, and has a plurality of linear portions 107 stretching approximately in the same direction and arranged approximately in parallel individually, and turning portions 108 connecting between the ends of adjoining linear portions, and a pair of leads 106 stretching from both ends of the body. <P>COPYRIGHT: (C)2008,JPO&INPIT |
