Patent ID: 6992540
Filing Date: 2006-01-31
Classification: H01P

Abstract:
1. A two-port isolator comprising: a permanent magnet; a microwave ferrite member to which a DC magnetic field is applied by the permanent magnet; a first center electrode disposed on a surface of the microwave ferrite member or disposed in the microwave ferrite member, the first center electrode having a first end electrically connected with an input port and a second end electrically connected with an output port; a second center electrode disposed on the surface of the microwave ferrite member or disposed in the microwave ferrite member so as to intersect with the first center electrode with electrical isolation therebetween, the second center electrode having a first end electrically connected with the output port and a second end electrically connected with a ground; a first capacitor electrically connected between the input port and the output port; a second capacitor electrically connected between the output port and ground; and a resistor electrically connected between the input port and the output port; wherein the second capacitor has a Q factor that is substantially higher than the first capacitor.