Patent ID: 6900704

Claim:
A two-port isolator comprising: a permanent magnet; a ferrite to which a DC magnetic field is applied by the permanent magnet; a first central electrode disposed on a main surface of the ferrite or inside the ferrite, one end of the first central electrode being electrically connected to a first input-output port, and the other end of the first central electrode being electrically connected to a second input-output port; a second central electrode disposed on the main surface of the ferrite or inside the ferrite so as to intersect the first central electrode with electrical insulation disposed therebetween, one end of the second central electrode being electrically connected to the second input-output port, and the other end of the second central electrode being electrically connected to a third port; a first matching capacitor electrically connected between the first input-output port and the second input-output port; a resistor electrically connected between the first input-output port and the second input-output port; and a second matching capacitor electrically connected between the second input-output port and the third port; wherein the third port is electrically connected to a ground and the inductance L 1 of the first central electrode is different from the inductance L 2 of the second central electrode.