摘要 |
A highly reliable nonreciprocal circuit device can be easily manufactured at low cost. In the nonreciprocal circuit device, a resin layer is formed on the surface of a metal case. On a ferrite member, the terminals of central conductors are arranged with a predetermined angle therebetween. Inside a resin case including input/output terminals and ground terminals, there are arranged the ferrite member, the central conductors, a permanent magnet for applying a static magnetic field to the ferrite member and the central conductors, a resistor, and capacitors. The resin case is sandwiched by an upper yoke and a lower yoke. A resin layer formed of a thermosetting resin is arranged on each of the yokes. When the permanent magnet is thermally demagnetized, the thermosetting resin layer is hardened at the same time.
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