| 摘要 |
Provided is an antenna coil capable of forming a magnetic field in a desired direction in an efficient manner, while suppressing leakage of magnetic flux into a space other than the space in which the magnetic field is formed. The antenna coil includes a main coil portion 41 formed by winding a length of conductor wire 40 around a first reference axis X1 and an auxiliary coil portion 42 formed by winding the conductor wire 40 around a second reference axis X2. The second reference axis X2 is set to intersect the magnetic flux of the main coil portion 41 at an axial end of the auxiliary coil portion 42. The main coil portion 41 and the auxiliary coil portion 42 are connected to together form a closed circuit. |
