Non-reciprocal circuit element

A non-reciprocal circuit element comprising:

• a magnetic material to which a DC magnetic field is applied;
• and
• a first center electrode, a second center electrode, and a third center electrode disposed on the magnetic material so as to intersect each other in an insulated state, wherein
• one end of the first center electrode is a first port, one end of the second center electrode is a second port, and one end of the third center electrode is a third port,
• other ends of the first center electrode, the second center electrode, and the third center electrode are connected to each other and connected to a ground terminal,
• capacitance elements are connected in parallel with the first center electrode, the second center electrode, and the third center electrode, respectively,
• a first variable capacitance element is connected between the ground terminal and ground and in series with an inductor element, and
• a first thermistor element is connected to a control power supply circuit of the first variable capacitance element and in series with the first variable capacitance element.

A non-reciprocal circuit element comprising:

• a magnetic material to which a DC magnetic field is applied;
• and
• a first center electrode, a second center electrode, and a third center electrode disposed on the magnetic material so as to intersect each other in an insulated state, wherein
• one end of the first center electrode is a first port, one end of the second center electrode is a second port, and one end of the third center electrode is a third port,
• other ends of the first center electrode, the second center electrode, and the third center electrode are connected to each other and connected to a ground terminal,
• first, second and third variable capacitance elements are connected in parallel with the first center electrode, the second center electrode, and the third center electrode, respectively, and
• each of the first, second and third thermistor elements is connected to a control power supply circuit of each of the first, second and third variable capacitance elements, respectively and in series with each of the first, second and third variable capacitance elements, respectively.