Patent ID: 8077106

Claim:
A receiving antenna coil, comprising: a core including an X-axis winding core part extending in an X-axis direction and a Y-axis winding core part extending in a Y-axis direction crossing said X-axis direction; an X-axis receiving coil wound around said X-axis winding core part and a Y-axis receiving coil wound around said Y-axis winding core part; and a Z-axis receiving coil wound in a Z-axis direction crossing both said X-axis direction and said Y-axis direction so as to surround said X-axis winding core part and said Y-axis winding core part, wherein said X-axis winding core part and said Y-axis winding core part each comprises a magnetic material and are provided in a same plane, and said X-axis winding core part comprises one or more bars provided in a plurality of places in said Y-axis direction, and said Y-axis winding core part comprises one or more bars provided in a plurality of places in said X-axis direction, and wherein said X-axis winding core part and said Y-axis winding core part form a closed rectangular loop shape or an H-letter shape in an XY plane.