A subminiature circulator includes feed pin assemblies, a hollow base having an opening formed in the top, and a locating iron sheet, wherein a laminated assembly is arranged in the base, notches are formed in the peripheral wall of the base and are communicated with the bottom face of the base, the locating iron sheet is clamped in the laminated assembly and is provided with extension parts which stretch out of the base via the notches, and the feed pin assemblies are installed in installation holes formed in the extension parts. The feed pin assemblies are arranged in the installation holes formed in the extension parts of the locating iron sheet, and such installation manner is not limited to an integrally-formed structure, so that a sophisticated device is easy to machine in the fabrication process.

A subminiature circulator includes feed pin assemblies, a hollow base having an opening formed in the top, and a locating iron sheet, wherein a laminated assembly is arranged in the base, notches are formed in the peripheral wall of the base and are communicated with the bottom face of the base, the locating iron sheet is clamped in the laminated assembly and is provided with extension parts which stretch out of the base via the notches, and the feed pin assemblies are installed in installation holes formed in the extension parts. The feed pin assemblies are arranged in the installation holes formed in the extension parts of the locating iron sheet, and such installation manner is not limited to an integrally-formed structure, so that a sophisticated device is easy to machine in the fabrication process.

A reciprocal element includes a housing having a plurality of circumferential side portions with a plurality of openings and a bottom portion in which at least one removed portion is defined. A first lamination part includes a center conductor with a plurality of leads extending to the outside of the plurality of openings, respectively, wherein the first lamination part is laminated on the bottom portion. A frame includes a main body to accommodate the first lamination part, at least one leg portion extending from a lower edge of the main body and insertedly coupled to the removed portion, and a plurality of supporting portions extending in an outer direction from the main body to support the plurality of leads, wherein through-holes extend in a vertical direction and defined in the plurality of supporting portions, respectively; and a plurality of conductive pins coupled to the plurality of through-holes, respectively.

An apparatus is disclosed having a circulator having a transmit port, a receive port, and a tuner port with tuner circuitry coupled between the tuner port and an antenna port. At least one analog control branch is coupled between the receive port and at least one control input of the tuner circuitry to generate at least one control signal from a transmit leakage signal leaking into the receive port. The tuner circuitry is configured to respond to the at least one control signal by automatically electronically tuning such that a cancellation signal of substantially equal amplitude and opposite phase of that of the transmit leakage signal is reflected through the tuner port and into the receive port, thereby reducing the transmit leakage signal to a level corresponding to an isolation of at least 30 dB between the transmit port and the receive port.

An apparatus is disclosed having a circulator having a transmit port, a receive port, and a tuner port with tuner circuitry coupled between the tuner port and an antenna port. At least one analog control branch is coupled between the receive port and at least one control input of the tuner circuitry to generate at least one control signal from a transmit leakage signal leaking into the receive port. The tuner circuitry is configured to respond to the at least one control signal by automatically electronically tuning such that a cancellation signal of substantially equal amplitude and opposite phase of that of the transmit leakage signal is reflected through the tuner port and into the receive port, thereby reducing the transmit leakage signal to a level corresponding to an isolation of at least 30 dB between the transmit port and the receive port.

A circulator is provided, comprising, first second and third conductors forming three equally spaced junctions and a permanent magnet configured to apply a shaped bias magnetic field to a ferrite resonator in operable communication with the first, second, and third conductors. The permanent magnet comprises a substantially planar monolithic structure having defined thereon at least first and second substantially concentric regions having first and second respective magnetic field strength levels, wherein the second magnetic field strength level is lower than the first magnetic field strength level. The first and second magnetic field strength levels are configured to cooperate to shape an external bias magnetic field of the permanent magnet to counteract at least a portion of a demagnetizing effect resulting from of an overall shape of the ferrite resonator, to achieve a substantially uniform internal magnetic bias within at least a portion of the ferrite resonator.

A circulator is provided, comprising, first second and third conductors forming three equally spaced junctions and a permanent magnet configured to apply a shaped bias magnetic field to a ferrite resonator in operable communication with the first, second, and third conductors. The permanent magnet comprises a substantially planar monolithic structure having defined thereon at least first and second substantially concentric regions having first and second respective magnetic field strength levels, wherein the second magnetic field strength level is lower than the first magnetic field strength level. The first and second magnetic field strength levels are configured to cooperate to shape an external bias magnetic field of the permanent magnet to counteract at least a portion of a demagnetizing effect resulting from of an overall shape of the ferrite resonator, to achieve a substantially uniform internal magnetic bias within at least a portion of the ferrite resonator.

A circulator is provided, comprising, first second and third conductors forming three equally spaced junctions and a permanent magnet configured to apply a shaped bias magnetic field to a ferrite resonator in operable communication with the first, second, and third conductors. The permanent magnet comprises a substantially planar monolithic structure having defined thereon at least first and second substantially concentric regions having first and second respective magnetic field strength levels, wherein the second magnetic field strength level is lower than the first magnetic field strength level. The first and second magnetic field strength levels are configured to cooperate to shape an external bias magnetic field of the permanent magnet to counteract at least a portion of a demagnetizing effect resulting from of an overall shape of the ferrite resonator, to achieve a substantially uniform internal magnetic bias within at least a portion of the ferrite resonator.

A circulator is provided, comprising, first second and third conductors forming three equally spaced junctions and a permanent magnet configured to apply a shaped bias magnetic field to a ferrite resonator in operable communication with the first, second, and third conductors. The permanent magnet comprises a substantially planar monolithic structure having defined thereon at least first and second substantially concentric regions having first and second respective magnetic field strength levels, wherein the second magnetic field strength level is lower than the first magnetic field strength level. The first and second magnetic field strength levels are configured to cooperate to shape an external bias magnetic field of the permanent magnet to counteract at least a portion of a demagnetizing effect resulting from of an overall shape of the ferrite resonator, to achieve a substantially uniform internal magnetic bias within at least a portion of the ferrite resonator.

Integration of self-biased magnetic circulators with microwave devices is disclosed herein. In microwave and other high-frequency radio frequency (RF) applications, a magnetic circulator can be implemented with a smaller permanent magnet. Aspects disclosed herein include a process flow for producing a self-biased circulator in an integrated circuit chip. In this regard, a magnetic circulator junction can be fabricated on an active layer of a semiconductor wafer. A deep pocket or cavity is formed in an insulating substrate under the active layer. This cavity is then filled with a ferromagnetic material such that the circulator junction is self-biased within the integrated circuit chip, eliminating the need for an external magnet. The self-biased circulator provides high isolation between ports in a smaller integrated circuit.