Non-reciprocal circuit element

摘要

In a non-reciprocal circuit element, the characteristics variation with respect to temperature is suppressed with a simple configuration without changing a magnetic material or the material of a magnet. A non-reciprocal circuit element includes: a magnetic material (32) to which a DC magnetic field (G) is applied; a plurality of center electrodes (35, 36) disposed on the magnetic material (32) so as to intersect each other in an insulated state; a terminal resistor (R) connected between input and output ports (P1, P2) and in in parallel with one of the center electrodes (35, 36); a variable capacitance element (C11) connected between the input and output ports (P1, P2) and in parallel with the terminal resistor (R); and a thermistor element (S) connected to a control power supply circuit (E) of the variable capacitance element (C11) and in series with the variable capacitance element (C11).

主权项

1. A non-reciprocal circuit element comprising:
a magnetic material to which a DC magnetic field is applied; a plurality of center electrodes disposed on the magnetic material so as to intersect each other in an insulated state; a terminal resistor connected between input and output ports and in parallel with one of the center electrodes; a first variable capacitance element connected between the input and output ports and in parallel with the terminal resistor; a control power supply circuit supplying a voltage to the first variable capacitance; and a first thermistor element connected to the control power supply circuit and in series with the first variable capacitance element, wherein:
a resistance value of the first thermistor element changes in response to temperature,a capacitance value of the first variable capacitor varies in response to changes of the voltage supplied by the control power supply circuit, andthe voltage supplied by the power supply circuit changes in response to the resistance value of the first thermistor element.