| 主权项 |
1. A push-button switch including a wiring board having a first surface on which electronic components are mounted, the push-button switch being used for an immobilizer system and supplying power to a portable device from the first surface side of the wiring board, the push-button switch comprising:
a coil antenna including a magnetic core and a coil conductor wound around the magnetic core, the coil antenna being attached to a second surface of the wiring board; and a conductor pattern formed in at least one wiring layer so as to surround the coil conductor in plan view, the wiring board having an inner layer including the at least one wiring layer, wherein the coil conductor is connected to the conductor pattern, and wherein a direction of current flowing through the coil conductor is the same as a direction of current flowing through the conductor pattern. |
