| 摘要 |
The present invention provides an antenna coil which can be made smaller and intends to improve a receiving sensitivity in consideration of all directions. According to one embodiment of the present invention, an antenna coil including: a first coil 4 having an X-axis coil wound on an X axis of a first core and a Z-axis coil wound on a Z axis of the first core, the thickness direction of the first core being determined to be the Z-axis, an axis orthogonal to the Z axis being determined to be the X axis; a second coil 5 having a Y-axis coil wound around a second core, the second core having flanges at both ends; four external terminals 3 each connected to a corresponding end of the X-axis coil or the Z-axis coil and additionally provided on the first core; and two external terminals 3 each connected to a corresponding end of the Y-axis coil and additionally provided on the second core. The first coil 4 and the second coil 5 are arranged to be close to each other so that winding axis directions of the X-axis coil, the Y-axis coil, and the Z-axis coil are orthogonal to each other. The first coil 4 and the second coil 5 are integrally molded using an exterior resin 2, leaving part of each of the external terminals to be connected to an external circuit.
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