Antenna coil to be mounted on a circuit board and antenna device

摘要

An antenna coil comprises a first magnetic core (4a) shaped like a flat plate, a second magnetic core (4a) shaped like a flat plate and juxtaposed to the first magnetic core (4a) with a space therebetween, a first coil portion (2a) formed around the first magnetic core (4a) by the conductor, and a second coil portion (2b) formed around the second magnetic core (4a) by the conductor such that a coil axis direction of the second coil portion (2b) coincides with a coil axis direction of the first coil portion (2a), and such that a coil winding direction of the second coil portion (2b) is opposite to a coil winding direction of the first coil portion (2a), wherein one flexible board (5) having a conductor on a surface thereof is provided, wherein the first coil portion (2a) is formed by the conductor, and wherein the second coil portion (2b) is formed by the conductor, and wherein a connecting conductor (7) is formed by the conductor so as to connect the first coil portion (2a) and the second coil portion (2b).