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.

The present disclosure relates to an electrical filter arrangement including a transmitter port, a receiver port and an antenna port. The electrical filter arrangement further includes a transmitter filter connected to the first transmitter port and a receiver filter connected to the receiver port. The electrical filter arrangement further includes a four-port circulator device that is connected between the filters, the antenna port, and a termination impedance that is connected to ground. The circulator device is adapted to admit signals to pass from the transmitter filter to the antenna port, from the antenna port to the receiver filter, and from the receiver filter to the termination impedance.

The present disclosure relates to an electrical filter arrangement including a transmitter port, a receiver port and an antenna port. The electrical filter arrangement further includes a transmitter filter connected to the first transmitter port and a receiver filter connected to the receiver port. The electrical filter arrangement further includes a four-port circulator device that is connected between the filters, the antenna port, and a termination impedance that is connected to ground. The circulator device is adapted to admit signals to pass from the transmitter filter to the antenna port, from the antenna port to the receiver filter, and from the receiver filter to the termination impedance.

A device includes a top ferrite layer and a bottom ferrite layer. The device also includes a first circuit stack between the top ferrite layer and the bottom ferrite layer. The first circuit stack includes a first dielectric layer and a circulator circuit including a first circuit portion on a first side of the first dielectric layer and a second circuit portion on a second side of the first dielectric layer opposite the first side. The first circuit portion is different from the second circuit portion. The device also includes a second circuit stack including a second dielectric layer and a top ground layer disposed over the second dielectric layer. The second circuit stack is disposed over the top ferrite layer.

A device includes a top ferrite layer and a bottom ferrite layer. The device also includes a first circuit stack between the top ferrite layer and the bottom ferrite layer. The first circuit stack includes a first dielectric layer and a circulator circuit including a first circuit portion on a first side of the first dielectric layer and a second circuit portion on a second side of the first dielectric layer opposite the first side. The first circuit portion is different from the second circuit portion. The device also includes a second circuit stack including a second dielectric layer and a top ground layer disposed over the second dielectric layer. The second circuit stack is disposed over the top ferrite layer.

The present disclosure relates to a radio system comprising an antenna device, an antenna connector arrangement and a radio transceiver with a transmitter branch and a receiver branch. The antenna connector arrangement connects the antenna device to the transmitter branch and to the receiver branch, and comprises a first tuneable band-stop filter, a second tuneable band-stop filter and a three-way-junction. The first tuneable band-stop filter is connected to the transmitter branch and a transmitter input port of the three-way-junction to filter radio signals, and the second tuneable band-stop filter is connected to the receiver branch and a receiver output port of the three-way-junction to filter radio signals. The three-way-junction comprises a first antenna port that is connected to the antenna device. The present disclosure also relates to an antenna connector arrangement, an antenna arrangement, and an electrically tuneable waveguide band-stop filter arrangement.

The present disclosure relates to a radio system comprising an antenna device, an antenna connector arrangement and a radio transceiver with a transmitter branch and a receiver branch. The antenna connector arrangement connects the antenna device to the transmitter branch and to the receiver branch, and comprises a first tuneable band-stop filter, a second tuneable band-stop filter and a three-way-junction. The first tuneable band-stop filter is connected to the transmitter branch and a transmitter input port of the three-way-junction to filter radio signals, and the second tuneable band-stop filter is connected to the receiver branch and a receiver output port of the three-way-junction to filter radio signals. The three-way-junction comprises a first antenna port that is connected to the antenna device. The present disclosure also relates to an antenna connector arrangement, an antenna arrangement, and an electrically tuneable waveguide band-stop filter arrangement.

A front end circuit includes a circulator having a first port into which a transmission signal is input, a second port into/from which a transmission/reception signal is input/output, and a third port from which a reception signal is output. The impedance of the second port of the circulator is set to a value different from the impedance value of the first port and the third port. With his configuration, the narrowing of a frequency band and the increase in loss, which occur when an impedance matching circuit is additionally provided, are prevented.

A front end circuit includes a circulator having a first port into which a transmission signal is input, a second port into/from which a transmission/reception signal is input/output, and a third port from which a reception signal is output. The impedance of the second port of the circulator is set to a value different from the impedance value of the first port and the third port. With his configuration, the narrowing of a frequency band and the increase in loss, which occur when an impedance matching circuit is additionally provided, are prevented.