| 摘要 |
PROBLEM TO BE SOLVED: To easily adjust the inductance of an antenna coil by electrically connecting an IC to an end part of an antenna coil printed on one surface of a plastic film and making open an end part of an antenna coil printed on the other surface of the plastic film. SOLUTION: The antenna coil 2 is printed on the top surface of the plastic film 1 and the antenna coil 3 is printed on its reverse surface. Then the end part (a) of the antenna coil 2 is connected to a terminal of an IC 4 through an end part (b) by a jumper line 5. Further, another terminal 7 of the IC 4 is connected directly to the other end part of the antenna, coil 2 and end parts (c) and (d) of the antenna coil 3, on the other hand, are connected nowhere and made open. Consequently, the antenna coils 2 and 3 can easily be adjusted in inductance and the yield of manufacture can be improved. |
