Patent ID: 7990331

Claim:
An antenna coil comprising: a first magnetic core having a flat plate shape; a second magnetic core having a flat plate shape and juxtaposed to the first magnetic core with a space therebetween; one flexible board wound around the two magnetic cores and having a conductor on a surface thereof; a first coil portion arranged around the first magnetic core by the conductor; a second coil portion arranged around the second magnetic core by the conductor such that a coil axis direction of the second coil portion coincides with a coil axis direction of the first coil portion, and such that a coil winding direction of the second coil portion is opposite to a coil winding direction of the first coil portion; and a connecting conductor defined by the conductor and arranged so as to connect the first coil portion and the second coil portion; wherein the first coil portion, the second coil portion, and the connecting conductor are all disposed on the surface of the one flexible board.