| 摘要 |
An irreversible circuit element that achieves both miniaturization and low loss and has superior temperature stability is obtained. In the irreversible circuit element, a plurality of central conductors 21, 22, 23 are disposed, in an insulated state and intersecting one another, on ferrite 20 to which a DC magnetic field is applied by a permanent magnet. One end of each of the central conductors serves as an input/output port P1, P2, P3, and the other ends are connected to the ground. Capacitance elements C1, C2, C3 are connected in parallel to the respective central conductors. The permanent magnet includes a first permanent magnet 25A and a second permanent magnet 25B. The first permanent magnet 25A and the second permanent magnet 25B apply the DC magnetic fields to the ferrite 20 in directions opposite to each other, and have residual magnetic flux density versus temperature characteristics that are different from each other. |
