| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-reciprocal circuit device which is capable of transmitting inputted signals to an output terminal with small loss, while efficiently maintaining the signals in energy. SOLUTION: A non-reciprocal circuit device is equipped with magnetic yokes 1 and 2 serving as also as a case, a permanent magnet 9, a center conductor 8, and a magnetic material 7. The magnetic yoke is formed of mother material of a metal plate that is 120 to 240μm in thickness and whose main component is iron, and the surface of the magnetic yoke is covered with a metal film which has resistivity of 5.5μΩ.cm or below, is 0.5 to 25μm in thickness, and high in electric conductivity.
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