Circulator, front-end circuit, antenna circuit, and communication apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorReiji NAKAJIMA
Life of this patent
Estimating the term…
Abstract
A circulator includes: a ferrite plate; a permanent magnet that applies a direct current (DC) magnetic field to the ferrite plate; a first coil, a second coil, and a third coil arranged on the ferrite plate while being insulated from one another, the first coil, the second coil, and the third coil having coil axes intersecting one another; a first port that is electrically continuous with the first coil; a second port that is electrically continuous with the second coil; and a third port that is electrically continuous with the third coil. An inductance of the first coil or the second coil is different from an inductance of the third coil, and an impedance of the first port or the second port is not 50Ω.
Claims20
A circulator comprising:
- a ferrite plate;
- a permanent magnet that applies a direct current (DC) magnetic field to the ferrite plate;
- a first coil, a second coil, and a third coil arranged on the ferrite plate while the first coil, the second coil, and the third coil being insulated from one another, the first coil, the second coil, and the third coil having coil axes intersecting one another;
- a first port that is electrically continuous with the first coil;
- a second port that is electrically continuous with the second coil;
- and
- a third port that is electrically continuous with the third coil, wherein:
- the permanent magnet applies a DC magnetic field to the ferrite plate such that a signal input to the first port will be output to the third port and a signal input to the third port will be output to the second port, and
- an inductance of the first coil or the second coil is different from an inductance of the third coil, and an impedance of the first port or the second port is not 50Ω.
Dependencies are inferred from the claim text.