Nonreciprocal circuit device with vertical capacitors above half thickness of the ferrite
AssigneeMurata Manufacturing Co., Ltd.
InventorsToshihiro Makino, Takashi Kawanami, Takahiro Jodo, Takashi Hasegawa, Masakatsu Mori
Life of this patent
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Abstract
A nonreciprocal circuit device which can be miniaturized, and can achieve low insertion loss, having plate-like capacitors disposed vertically. Single plate capacitors are arranged vertically so that their electrode faces are at an angle of 90 degrees to a ferrite, and in addition, their bottom faces are at a position above the bottom half of the thickness of the ferrite, or more preferably, at a position higher than the top face of the ferrite.
Claims23
A nonreciprocal circuit device comprising:
- a case;
- a plurality of central conductors provided on a plate-shape ferrite in the case, a permanent magnet applying a DC magnetic field to said central conductors and said ferrite, and a plurality of plate-shaped capacitors accommodated in the case and connected to ports of said central conductors;
- said ferrite having top and bottom main faces, both main faces thereof being substantially parallel to a mounting surface, and said capacitors being disposed so that electrode surfaces of the capacitors are substantially perpendicular to the mounting surface, and a respective bottom face of each of the capacitors is disposed at a position above the bottom half of the thickness of said ferrite;
- each of said plurality of central conductors including a port which is bent upwardly so as to be substantially perpendicular to the mounting surface.
A communication device comprising:
- a high-frequency circuit comprising one of a transmitter and a receiver, and a non-reciprocal circuit device connected to said high-frequency circuit;
- said non-reciprocal circuit device comprising:
- a case;
- a plurality of central conductors provided on a plate-shaped ferrite in the case, a permanent magnet applying a DC magnetic field to said central conductors and said ferrite, and a plurality of plate-shaped capacitors accommodated in the case and connected to ports of said central conductors;
- said ferrite having top and bottom main faces, both main faces thereof being substantially parallel to a mounting surface, and said capacitors being disposed so that electrode surfaces of the capacitors are substantially perpendicular to the mounting surface, and a respective bottom face of each of the capacitors is disposed at a position above the bottom half of the thickness of said ferrite;
- each of said plurality of central conductors including a port which is bent upwardly so as to be substantially perpendicular to the mounting surface.
A nonreciprocal circuit device comprising:
- a resin case;
- a plurality of central conductors provided on a plate-shaped ferrite in the resin case, a permanent magnet applying a DC magnetic field to central conductors and said ferrite,
- a plurality of plate-shaped capacitors accommodated in respective recessed portions of the resin case and connected to ports of said central conductors;
- and
- a plurality of ground terminals, one end of each said ground terminal being disposed in a respective one of said recessed portions adjacent to the corresponding said capacitor;
- said ferrite having top and bottom main faces, both main faces thereof being substantially parallel to a mounting surface, and said capacitors being disposed so that electrode surfaces of the capacitors are substantially perpendicular to the mounting surface, and a respective bottom face of each of the capacitors is disposed at a position above the bottom half of the thickness of said ferrite.
Dependencies are inferred from the claim text.