Patent ID: 6977559

Claim:
A nonreciprocal circuit element comprising: a flat ferrite member; first, second and third central conductors disposed on the ferrite member such that the first, second and third central conductors are disposed on surfaces different in a vertical direction with a dielectric element interposed therebetween, and parts thereof intersecting one another in the vertical direction; a magnet disposed on the central conductors; a first yoke disposed so as to cover a top surface of the magnet; and a second yoke forming a closed magnetic circuit in combination with the first yoke, the second yoke being disposed below the ferrite member; wherein the first yoke has a rectangular upper plate, a pair of side plates bent downward from at least sides of the upper plate facing each other, and notch parts formed in a central portion of the pair of side plates, and respective ends of the magnet are placed within the notch parts.