In accordance with one or more embodiments, a directional coupler includes a first dielectric cable is configured to receive a first electromagnetic wave from the first port and to generate a second electromagnetic wave that propagates along a transmission medium in a first direction without requiring an electrical return path. A second dielectric cable is configured to couple a first portion of the second electromagnetic wave to a second port, wherein a second portion of the second electromagnetic wave continues to propagate in the first direction along the transmission medium. A third dielectric cable is configured to couple the second portion of the second electromagnetic wave to a third port and to isolate the third port from a third electromagnetic wave propagating along the transmission medium in a second direction that is opposite to the first direction.

The invention relates to a high frequency amplifier unit comprising several amplifier modules to amplify high frequency input signals into high frequency output signals and a coaxial combiner having an outer conductor and an inner conductor arranged coaxially to this to combine the high frequency output signals of the amplifier modules, wherein the amplifier modules are arranged on the outside of the outer conductor of the coaxial combiner and the amplifier modules are connected to the coaxial inner conductor of the coaxial combiner to transmit the high frequency output signals to the coaxial combiner. The invention additionally relates to an amplifier system.

Power combiner/divider includes a transmission line (TL) resonator having an inner conductor, an outer conductor that surrounds the inner conductor, and a cavity between the inner conductor and the outer conductor. The inner conductor and the outer conductor are electrically connected at a proximal end of the TL resonator. The power combiner/divider also includes coupling elements extending through respective openings of the outer conductor and into the cavity. The power combiner/divider also includes a capacitive element connected to at least one of the inner conductor or the outer conductor. The capacitive element capacitively couples the inner conductor and the outer conductor at a distal end of the TL resonator.

An apparatus comprising a first power combiner/divider network and a second power combiner/divider network. The first power combiner/divider network splits a first electromagnetic signal into split signals that are connectable to signal processor(s). The second power combiner/divider network combines processed signals into a second electromagnetic signal. The apparatus includes a three-dimensional coaxial microstructure.

A blind mate waveguide flange includes a mating surface for interfacing with a waveguide probe interface. The mating surface includes a choke flange and a first opening to one end of a waveguide transition section. The choke flange includes a choke groove separating a peripheral region of the mating surface from an inner region of the mating surface. The inner region is recessed relative to the peripheral region to provide an air gap upon mating with another mating surface. The first opening has a first shape. The blind mate waveguide flange further includes a waveguide connection interface that includes a second opening at an opposite end of the waveguide transition section for interfacing with a waveguide. The second opening has a second shape such that the waveguide transition section provides a transition from the first shape to the second shape.

A stacked coaxial cavity radio frequency power combiner is disclosed that includes: an outer conductor in which a cavity is formed in an axial direction; a plurality of amplifier modules, including an input coupler that surrounds the device main body, each amplifier module is spaced apart from each other on the outer wall of the device main body, stacked, and disposed radially and orthogonally to the central axis of the cavity; an inner conductor configured to stack and spaced apart by a predetermined inner gap in the central axial direction in the cavity of the device main body and include a plurality of inner conductor blocks disposed corresponding to each layer of the amplifier module; at least one inner insulating support located between the plurality of inner conductor blocks; and an output coupler provided at one side of the device main body and extended outside of the device main body.

Power-combining devices, and more particularly spatial power-combining and related structural arrangements are disclosed. Such structural arrangements involve mechanical connections between center waveguide sections and input and/or output coaxial waveguide sections that provide scalable structures for different operating frequency bands, improved mechanical connections, and/or improved assembly. Exemplary structural arrangements include structures that extend through center waveguide sections and into input and/or output coaxial waveguide sections, integrated mechanical structures within the center waveguide section, compression fit arrangements, dielectric inserts arranged within channels of coaxial waveguide sections, and/or various combinations thereof.

An active waveguide transition includes a waveguide defining a waveguide volume and including a back short wall at a first end. A first probe is mounted on the waveguide in an operable position extending into the waveguide volume, and a first RF electrical signal connector is mounted on the active waveguide transition. A first circuit assembly is mechanically coupled to an exterior surface of the waveguide, the circuit assembly including a first multi-layer ceramic substrate with an RF amplifier system mounted thereon. The RF amplifier system is electrically coupled to the multi-layer ceramic substrate, the first probe, and the first RF electrical signal connector to define an active first signal path for RF communication signals between the probe and first RF signal connector.

A cable television apparatus includes a coupled-line directional coupler. The coupled-line directional coupler includes a coupled-line directional coupler body, an input side, an output side and a coupled side. The coupled-line directional coupler body receives a cable television video-audio-data signal through the input side or the output side. The coupled-line directional coupler body receives a high frequency signal through the input side. A frequency of the high frequency signal is higher than a frequency of the cable television video-audio-data signal. The coupled-line directional coupler body electromagnetically couples the high frequency signal to the coupled side. The coupled-line directional coupler includes a high pass filter function at the coupled side to filter out the cable television video-audio-data signal.

A directional coupler operable at microwave and RF frequencies. Embodiments of directional coupler includes a main transmission line supporting transverse electromagnetic (TEM) or quasi-TEM wave mode propagation. A coupled transmission line supports TEM or quasi-TEM wave mode propagation. The coupled transmission line is adjacent to and oriented at an angle with respect to the main transmission line. A coupling hole is formed through conductive shielding between the main and coupled lines, the coupling hole formed at an intersection region between the main and coupled lines. The angle is nominally 60 degrees for optimal directivity and isolation.