Patent ID: 9627764
Date: 2017-04-18
CPC Classifications: G06K,H01Q

Claim:
1. An antenna device comprising: a first coil which is wound in one direction; a second coil which is wound in a direction opposite to the winding direction of the first coil and which is disposed adjacent to the first coil; and a magnetic core having a first main surface and a second main surface, wherein the first coil and the second coil are disposed such that a conductor opening of the first coil and a conductor opening of the second coil are adjacent to each other, as viewed from above, the magnetic core is inserted into the conductor opening of the first coil and the conductor opening of the second coil such that a portion of a conductor line forming the first coil positioned farther away from the second coil than a portion of the conductor line forming the first coil and positioned closer to the second coil, and a portion of a conductor line forming the second coil positioned farther away from the first coil than a portion of the conductor line forming the second coil and positioned closer to the first coil, are disposed along the first main surface of the magnetic core, the windings of the first coil and the windings of the second coil are each configured such that an innermost winding portion of each of the first and second coils on the second main surface are closer to each other as compared to respective innermost winding portions of the first and second coils on the first main surface, and the first coil and the second coil are connected with each other in polarities such that a current and a voltage induced in the first coil are in phase with a current and a voltage induced in the second coil when magnetic flux passes through the magnetic core in one direction.