Patent ID: 7532084
Filing Date: 2009-05-12
Classification: H01P

Abstract:
1. A non-reciprocal circuit element comprising: a permanent magnet; a ferrite arranged to receive a direct-current magnetic field from the permanent magnet; a first center electrode disposed on the ferrite, one end of the first center electrode being electrically connected to an input port, and the other end of the first center electrode being electrically connected to an output port; a second center electrode arranged on the ferrite so as to intersect the first center electrode with being insulated from the first center electrode, one end of the second center electrode being electrically connected to the output port, and the other end of the second center electrode being electrically connected to a ground port; a first matching capacitor electrically connected between the input port and the output port; a second matching capacitor electrically connected between the output port and the ground port; a resistor electrically connected between the input port and the output port; and an inductor and a capacitor constituting an LC series resonant circuit electrically connected in parallel to the first center electrode and in series with the resistor between the input port and the output port.