Nonreciprocal circuit device and communications device
AssigneeMurata Manufacturing Co., Ltd.
InventorsHiromu Tokudera, Katsuyuki Ohira
Life of this patent
Estimating the term…
Abstract
A nonreciprocal circuit device can be reduced in size by omitting an impedance matching circuit. The nonreciprocal circuit device includes a ferrite member, a plurality of mutually intersecting central conductors disposed in proximity to the ferrite member, and a magnet for applying a DC magnetic field. The plurality of central conductors have lengths of substantially λg/2 or a multiple thereof with respect to a wavelength λg at a usable frequency. One end of each of the central conductors is connected to an input/output terminal, and the other end thereof is disconnected so as to be an electrically open end. Alternatively, the central conductors may have lengths of substantially λg/4 or a multiple thereof, the other ends thereof being grounded.
Claims10
A nonreciprocal circuit device comprising:
- a magnetic body;
- a plurality of mutually intersecting central conductors disposed in proximity to said magnetic body;
- and
- a magnet for applying a DC magnetic field to said central conductors;
- wherein a plurality of central conductors have lengths of substantially n·λg/2, n being a natural number, λg being the wavelength of a usable frequency, and with one end of each of the central conductors being connected to an input/output terminal of said non-reciprocal circuit device and the other end thereof being electrically open.
A nonreciprocal circuit device comprising:
- a magnetic body;
- a plurality of mutually intersecting central conductors disposed in proximity to said magnetic body;
- and
- a magnet for applying a DC magnetic field to said central conductors;
- wherein the plurality of central conductors have lengths of substantially (2m−1)·λg/4, m being a natural number, λg being the wavelength of a usable frequency, and with one end of each of the central conductors being connected to an input/output terminal of said nonreciprocal circuit device and the other end thereof being connected to a ground terminal.
A communications device comprising:
- a transmitting circuit;
- a receiving circuit;
- and
- a nonreciprocal circuit device, said nonreciprocal circuit device comprising:
- a magnetic body;
- a plurality of mutually intersecting central conductors disposed in proximity to said magnetic body;
- and
- a magnet for applying a DC magnetic field to said central conductors;
- wherein a plurality of central conductors have lengths of substantially n·λg/2, n being a natural number, λg being the wavelength of a usable frequency, and with one end of each of the central conductors being connected to an input/output terminal of said non-reciprocal circuit device and the other end thereof being electrically open;
- and
- said nonreciprocal circuit device being connected to one of said transmitting circuit and said receiving circuit.
A communications device comprising:
- a transmitting circuit;
- a receiving circuit;
- and
- a nonreciprocal circuit device, said nonreciprocal circuit device comprising:
- a magnetic body;
- a plurality of mutually intersecting central conductors disposed in proximity to said magnetic body;
- and
- a magnet for applying a DC magnetic field to said central conductors;
- wherein the plurality of central conductors have lengths of substantially (2m−1)·λg/4, m being a natural number, λg being the wavelength of a usable frequency, and with one end of each of the central conductors being connected to an input/output terminal of said nonreciprocal circuit device and the other end thereof being connected to a ground terminal;
- and
- said nonreciprocal circuit device being connected to one of said transmitting circuit and said receiving circuit.
Dependencies are inferred from the claim text.