| 摘要 |
PROBLEM TO BE SOLVED: To realize an antenna that can provide an excellent communication environment by reducing unnecessary coupling with a metal object placed in the vicinity.SOLUTION: An antenna comprises: a plurality of stacked insulation layers; and a coil which is made up of a plurality of horizontal conductors formed on main surfaces of the plurality of insulation layers, and a plurality of vertical conductors formed on side parts of the insulation layers, and connecting a horizontal conductor formed on the main surface of one insulation layer and another horizontal conductor formed on the main surface of another insulation layer, and in which a horizontal conductor and a vertical conductor are connected sequentially, and formed as a spiral shape as a whole. The horizontal conductors are formed on the main surface of different insulation layers according to position in the longitudinal direction of the coil, and when either one of the main surfaces of insulation layers positioned at both ends in the stacked direction in the plurality of insulation layers on which the horizontal conductors are formed is regarded as a reference plane, the coil is formed so as to separate away from the reference plane toward at least one end from a prescribed position in the longitudinal direction of the coil. |
