Non-reciprocal circuit device, high-frequency circuit, and communication device

A non-reciprocal circuit device comprising:

• a permanent magnet;
• a ferrite to which a direct current magnetic field is applied by the permanent magnet;
• and a plurality of center conductors disposed on the ferrite so as to intersect with one another with being insulated from one another,
• wherein one ends of the respective center conductors serve as input-output ports, and other ends of the respective center conductors are connected to a ground,
• wherein capacitance elements are connected in parallel to the respective center conductors,
• wherein the permanent magnet includes a first permanent magnet and a second permanent magnet, and
• wherein, directions of respective direct current magnetic fields applied to the ferrite are opposite to each other in the first permanent magnet and the second permanent magnet, and there is a difference between temperature characteristics of respective residual magnetic flux densities in the first permanent magnet and the second permanent magnet.