| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact antenna coil with large inductance. SOLUTION: The antenna coil has a structure where conductive patterns on the same plane are provided with a mutually electrically connected pair of helical patterns wound in opposite directions and are made into multiple layers and conductive layers being adjacent via an insulating layer are provided with helical patterns which are mutually wound in the opposite directions when viewed from the same direction and are mutually electrically connected. Stronger inductance may be obtained when a core structure consisting of a magnetic body is provided in the central core part of the coil. |
