| 摘要 |
An isolator (a nonreciprocal circuit device) includes a magnetic assembly defined by center conductors for an input port, for an output port, and for a terminating port, and a ferrite member, a permanent magnet, and a spacer, all of which are provided in a housing. A series capacitor and a parallel capacitor are connected to the center conductor for the input port. A parallel capacitor is connected to the center conductor for the output port. A parallel capacitor and a resistor, which defines a terminating resistor, are connected to the center conductor for the terminating port. The center conductor for the input port has a width greater than that of the other center conductors. Thus, the characteristic impedance and the inductance of the center conductor for the input port are reduced to provide a wide operating frequency band. An equivalent series resistance is reduced to achieve a reduction in loss.
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