Patent ID: 7365616

Claim:
A non-reciprocal element with three central conductors, comprising: a ferrite thin plate with a static magnetic field being applied by a permanent magnet; and first, second and third central conductors arranged in proximity to the ferrite thin plate, to cross each other in an electrically insulated state; wherein an end of each of the first, second and third central conductors constitutes first, second and third input/output terminals, respectively, and the other end thereof is connected to a common portion; wherein first, second and third matching capacitors are inserted between the first, second and third input/output terminals, respectively, and the common portion; and wherein a resistor is connected between selected one of the first, second and third input/output terminals and the common portion, one of the remaining two input/output terminals constitutes an input terminal while the other remaining input/output terminal constitutes an output terminal, a central conductor portion directly connected to the input terminal and a central conductor portion directly connected to the output terminal are arranged at an intersection angle, as viewed from a position disposed between central conductor portions directly connected to the input terminal and the output terminal, of less than 90 degrees with each other; and wherein the intersection angle, as viewed from the position disposed between the input terminal and the output terminal, of the central conductor having the input terminal and the central conductor having the output terminal is about 60 degrees.