A coupling device is provided for coupling microwave radiation from a first microwave structure, in particular a microwave waveguide, into a second microwave structure, in particular a microwave resonant cavity, wherein the first and second microwave structures share a common wall, through an iris opening in said wall in front of which the coupling device is positioned on the side of the first microwave structure, in particular wherein the coupling device is of a basically cylindrical shape, characterized in that the coupling device comprises N electrically conducting conductor loops, with N≥3, preferably 3≤N≤20, that the conductor loops are arranged coaxially in an array along a z-axis, and that axially neighboring conductor loops are separated by a dielectric. The inventive coupling device allows for a larger coupling coefficient, and in particular allows for a larger dynamic range.

A modified directional coupler structure is used to provide a controllable time delay or phase shift for radiation propagating through the structure. A longitudinal displacement of the interaction region of the directional coupler relative to one or both of the waveguides of the directional coupler provides this effect. Double flexure arrangements can be used to provide longitudinal displacement with substantially no corresponding lateral displacement (or vice versa). In some embodiments, lateral and longitudinal displacement of the waveguides of the directional coupler are independently adjustable to provide full control of the power splitting and phase shift/time delay of the directional coupler.

A modified directional coupler structure is used to provide a controllable time delay or phase shift for radiation propagating through the structure. A longitudinal displacement of the interaction region of the directional coupler relative to one or both of the waveguides of the directional coupler provides this effect. Double flexure arrangements can be used to provide longitudinal displacement with substantially no corresponding lateral displacement (or vice versa). In some embodiments, lateral and longitudinal displacement of the waveguides of the directional coupler are independently adjustable to provide full control of the power splitting and phase shift/time delay of the directional coupler.

A load-pull test system uses controller, interface, calibration method and at least one low profile, two-probe, slide screw impedance tuner; the tuner probes share the same slabline; they are inserted anti-diametrical at fixed depth (distance from the center conductor) from both sides into the channel and move only horizontally along the slabline. The tuner does not have adjustable high precision vertical axes controlling the penetration of the probes and its low profile is optimized for on-wafer operations. The carriages holding the probes are moved at high speed along the slabline using linear electric actuators. An efficient de-embedding calibration method serves speeding up additionally the measurement procedure.

A load-pull test system uses controller, interface, calibration method and at least one low profile, two-probe, slide screw impedance tuner; the tuner probes share the same slabline; they are inserted anti-diametrical at fixed depth (distance from the center conductor) from both sides into the channel and move only horizontally along the slabline. The tuner does not have adjustable high precision vertical axes controlling the penetration of the probes and its low profile is optimized for on-wafer operations. The carriages holding the probes are moved at high speed along the slabline using linear electric actuators. An efficient de-embedding calibration method serves speeding up additionally the measurement procedure.

The present disclosure relates to the field of communication technologies, and more particularly, to an adjustable coupling device and a radio frequency communication device. The adjustable coupling device includes a coaxial transmission line for transmitting signals across the two terminals thereof and a coupling body for sampling the signals via coupling. The adjustable coupling device further includes a coupling cavity formed on the outer surface of the coaxial transmission line; a printed circuit board on which the coupling body is disposed, the printed circuit board capping the coupling cavity to seal the coupling body within the coupling cavity; a tuner, disposed through the printed circuit board, where the lower end of the tuner extends into the coupling cavity, and the tuner can be moved up and down to change the depth thereof extended into the coupling body so as to change the electromagnetic field distribution within the coupling cavity. In this way, the present disclosure has a simple structure and thus eliminates the influence on the coupling device derived from the structure and the machining accuracy and assembly techniques of printed circuit board, with simple tuning means and high reliability.

The present disclosure relates to the field of communication technologies, and more particularly, to an adjustable coupling device and a radio frequency communication device. The adjustable coupling device includes a coaxial transmission line for transmitting signals across the two terminals thereof and a coupling body for sampling the signals via coupling. The adjustable coupling device further includes a coupling cavity formed on the outer surface of the coaxial transmission line; a printed circuit board on which the coupling body is disposed, the printed circuit board capping the coupling cavity to seal the coupling body within the coupling cavity; a tuner, disposed through the printed circuit board, where the lower end of the tuner extends into the coupling cavity, and the tuner can be moved up and down to change the depth thereof extended into the coupling body so as to change the electromagnetic field distribution within the coupling cavity. In this way, the present disclosure has a simple structure and thus eliminates the influence on the coupling device derived from the structure and the machining accuracy and assembly techniques of printed circuit board, with simple tuning means and high reliability.

An embodiment of the present disclosure provides an impedance matching circuit including a matching network. The matching network includes a first port and a second port, and one or more variable reactance components. The one or more variable reactance components are operable to receive one or more variable voltage signals to cause the one or more variable reactance components to change an impedance of the matching network. At least one of the one or more variable reactance components includes a first conductor coupled to one of the first port or the second port of the matching network, a second conductor, and a tunable material positioned between the first conductor and the second conductor. Additionally, at least one of the first conductor and the second conductor are adapted to receive the one or more variable voltage signals to cause the change in the impedance of the matching network. Additional embodiments are disclosed.

An embodiment of the present disclosure provides an impedance matching circuit including a matching network. The matching network includes a first port and a second port, and one or more variable reactance components. The one or more variable reactance components are operable to receive one or more variable voltage signals to cause the one or more variable reactance components to change an impedance of the matching network. At least one of the one or more variable reactance components includes a first conductor coupled to one of the first port or the second port of the matching network, a second conductor, and a tunable material positioned between the first conductor and the second conductor. Additionally, at least one of the first conductor and the second conductor are adapted to receive the one or more variable voltage signals to cause the change in the impedance of the matching network. Additional embodiments are disclosed.

Embodiments of a circuit, system, and method are disclosed. In an embodiment, a circuit includes first and second microstrip transmission lines. The first and second microstrip transmission lines include linearly arranged conductive strips on the circuit and a slotline formation extends between the first microstrip transmission line and the second microstrip transmission line so that the slotline formation is configured to electromagnetically couple the first microstrip transmission line to the second microstrip transmission line during operation of the circuit. In addition, the circuit includes at least one controllable capacitance circuit electrically connected to at least one of the first microstrip transmission line and the second microstrip transmission line, where a magnitude of a capacitance value of the at least one controllable capacitance circuit (e.g., including a barium strontium titanate (BST) capacitor) is controllable (e.g., in response to a capacitance control signal received at a control interface).