Abstract: The present invention provides a coil component provided with a magnetic core and a coil wound around the magnetic core. The coil component of the present invention is provided with an eddy-current generation member using any one of or any combination of a tape member using a conductive metallic foil, a thin film using a conductive metal material, a ribbon using a conductive metal material, a coated film using a conductive metal material, and a plate member using a conductive metal material. In a coil antenna adopting the coil component of the present invention, it is enabled to adjust the Q value to a desired value without increasing the direct current resistance value.

Abstract: The present invention provides a coil component provided with a magnetic core and a coil wound around the magnetic core. The coil component of the present invention is provided with an eddy-current generation member using any one of or any combination of a tape member using a conductive metallic foil, a thin film using a conductive metal material, a ribbon using a conductive metal material, a coated film using a conductive metal material, and a plate member using a conductive metal material. In a coil antenna adopting the coil component of the present invention, it is enabled to adjust the Q value to a desired value without increasing the direct current resistance value.

Abstract: In a transmission antenna provided with an antenna coil outfitted with a core whereon a coil is mounted by winding, and with a capacitor connected to the aforementioned coil forming a serial resonance circuit between the aforementioned antenna coil inductance, the aforementioned antenna coil is outfitted with small core screw with a core smaller than the aforementioned core, and with a joining material that magnetically joins the aforementioned screw to the aforementioned core and with a screw hole that serves as a non-magnetic distance adjuster whereby the distance between the aforementioned core and the aforementioned screw is adjustable, and the resonance frequency is set by adjusting the thread volume of the aforementioned screw.

Abstract: In a transmission antenna provided with an antenna coil ouffitted with a core whereon a coil is mounted by winding, and with a capacitor connected to the aforementioned coil forming a serial resonance circuit between the aforementioned antenna coil inductance, the aforementioned antenna coil is outfitted with small core screw with a core smaller than the aforementioned core, and with a joining material that magnetically joins the aforementioned screw to the aforementioned core and with a screw hole that serves as a non-magnetic distance adjuster whereby the distance between the aforementioned core and the aforementioned screw is adjustable, and the resonance frequency is set by adjusting the thread volume of the aforementioned screw.