| 摘要 |
A magnetic rotor 2 includes a soft ferrite substrate 4 and a plurality of central conductors 31 - 33 . The magnetic rotor 2 is provided inside a casing 9 . A permanent magnet 8 is provided inside the casing 9 , and disposed to overlap the magnetic rotor 2 so as to apply a DC magnetic field to the magnetic rotor 2 . The casing 9 includes a magnetic metal material. The casing 9 is coupled with the permanent magnet 8 so as to form a yoke. A coupling portion 901 is formed in a direction crossing a magnetic circuit of the yoke. The casing 9 is coupled in a direction of the magnetic circuit through the coupling portion 901 . The coupling portion 901 includes a capacitance element which has high impedance in response to a DC current and has low impedance in response to a high frequency current.
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