Patent ID: 6955553

Claim:
A non-reciprocal device comprising a gyromagnetic component, a case and a circuit board, wherein: the gyromagnetic component comprises a soft ferrite body and a center conductor, the center conductor including a plurality of terminal portions and combined with the soft ferrite body; the case comprises a bottom portion and a plurality of side walls, the side walls arranged with a space therebetween on the periphery of the bottom portion; the circuit board comprising; a body having a through-hole; a plurality of external-terminal forming portions, each external-terminal forming portion protruding from the external side surface of the body and having a thick portion thicker than the body at the fore-end of the external-terminal forming portion; a plurality of conductor patterns, each conductor pattern including a connection electrode for center conductor, the connection electrode formed on the upper surface of the body, an external terminal electrode formed on the surface of said thick portion, and a connection conductor connecting the connection electrode for center conductor and the external terminal electrode to each other; the circuit board is placed inside the case so that the lower surface of the body of the circuit board is opposite to the internal surface of the bottom portion of the case and the external-terminal forming portions of the circuit board are led to the outside of the case through said spaces; and the gyromagnetic component is placed in the through-hole of the circuit board, the terminal portions of the center conductor being individually connected to the respective connection electrodes for center conductor.