| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna for a power transmission system capable of improving transmission efficiency by suppressing heating on a vehicle bottom part or emission of a magnetic field from the vehicle bottom part.SOLUTION: An antenna arranged at the bottom part of a vehicle includes: a main coil MC composed of a conductor enclosing a first axis as its center; and a plurality of sub coils SC composed of conductors enclosing a plurality of second axes included in a plane whose normal line is the first axis as their centers, where the plurality of sub coils SC are arranged so that the number of sub coils SC at a farther position from a circumference of the vehicle is larger than that of sub coils SC at a nearer position from the circumference of the vehicle. |
