| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a resistance reduction method for an antenna circuit, which can obtain desired characteristics with an inductance being maintained and at the same time a wiring resistance being reduced to an appropriate value. <P>SOLUTION: An antenna circuit 11 is provided in a transponder of a carrier frequency band of 13.56 MHz. The antenna circuit 11 includes: a predetermined base 12; and two antenna conductors 13a, 13b that are composed of a predetermined same conductor pattern constituting an antenna coil, formed on front and rear faces of the base 12, respectively, and electrically connected in parallel. Each of thicknesses of the two antenna conductors 13a, 13b is made to be no less than 5% but less than 50% of a total thickness of the two antenna conductors 13a, 13b and the base 12. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
