Abstract: Disclosed is a dual-band phase shifter in which series/parallel resonance circuits are applied to a polyphase filter to implement a phase shifter, which is a core block of a multi-channel RFIC for implementing a phased array antenna system. The dual-band phase shifter may be configured by converting a capacitor (C) of an LC circuit or a CL circuit in the RFIC into a series resonance circuit and converting an inductor (L) thereof into a parallel resonance circuit, so that a signal generator operating in one frequency band can operate in a dual-band.

Abstract: A digital phase shifter of the present invention is a digital phase shifter in which digital phase shift circuits are cascade-connected, each of the digital phase shift circuits including a signal line, a pair of inner lines provided on both sides of the signal line, a pair of outer lines provided on outer sides of the inner lines, a first ground conductor connected to one ends of the inner lines and one ends of the outer lines, a second ground conductor connected to the other ends of the outer lines, and a pair of electronic switches provided between the other ends of the inner lines and the second ground conductor. The digital phase shift circuits include a multi-row structure constituted by a front row and a rear row, the front row and the rear row are adjacent to each other, and the ground pattern is connected to the front row at one point.

Abstract: The present disclosure relates to a waveguide gasket arrangement (1, 1?, 1?) arranged for electrically sealing a waveguide interface (2) between a first waveguide end (3) and a second waveguide end (4). The waveguide gasket arrangement (1, 1?, 1?) comprises a carrier arrangement (5, 5?, 5?) where a carrier aperture (6; 6a, 6b) is formed in the mounted carrier arrangement (5, 5?, 5?). The waveguide gasket arrangement (1, 1?, 1?) further comprises an electrically conducting flexible ribbon arrangement (7) that comprises at least one plurality of electrically conducting members (8a, 8b) forming a coherent common structure.

Abstract: Baluns with integrated matching networks are provided herein. In certain embodiments, a balun structure includes a first pair of coupled lines, a second pair of coupled lines and a transmission line. Additionally, a first port of the balun is connected to a reference voltage by way of a first line of the first pair of coupled lines, the transmission line, and a first line of the second pair of coupled lines. Furthermore, a second port of the balun is connected to the reference voltage by way of a second line of the first pair of coupled lines, while a third port of the balun is connected to the reference voltage by way of a second line of the second pair of coupled lines. The first port serves as an unbalanced signal terminal, while the second port and the third port serve as positive and negative signal terminals.

Abstract: A low profile two probe load-pull slide screw impedance tuner uses two tuning probes sharing the same slabline; they are inserted diametrically 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 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. The “S” shaped center conductor allows for a neutral zero 50 Ohm state. An efficient de-embedding calibration method serves speeding up the measurement procedure additionally.

Abstract: A circuit board includes a multilayer body including a main surface, a mounted conductor, and a signal conductor at an intermediate position in the lamination direction of the multilayer body, and a ground conductor on the main surface. The multilayer body includes a connection portion including a portion overlapping the mounted conductor and overlapping an external board joined via a conductive joint material through use of the mounted conductor, and a circuit portion. A first region, which is the region of a circuit portion of the ground conductor, includes opening holes and a second region, which is the region of a connection portion of the ground conductor, includes opening holes. The ratio of the opening area of the opening holes to that of the second region is larger than the ratio of the opening area of the opening holes to that of the first region.

Abstract: A power divider includes first to third transmission lines (TLs) and first to third capacitors. The second TL includes a first transmission portion (TP) and a first output portion (OP). The first TP is connected between the first TL and the first OP. The third TL includes a second TP and a second OP. The second TP is connected between the first TL and the second OP. The first capacitor is connected between ground and a common node of the first TL and the first and second TPs. The second capacitor is connected between ground and a terminal of the first OP distal from the first TP. The third capacitor is connected between ground and a terminal of the second OP distal from the second TP.

Abstract: An electrical filter structure for forwarding an electrical signal from a first port, e.g. P1, to a second port, e.g. P2, in a frequency selective manner, wherein the filter is a microwave filter, the electrical filter structure comprising: a plurality of pairs of an open stub and a short-circuited stub coupled electrically in parallel to a transmission line comprising a plurality of transmission line portions at a plurality of respective junctions between adjacent transmission line portions, e.g.

Abstract: A method for servicing a duplexer having a cavity resonator defining an opening covered by an RF plate. The RF plate defines an opening through which a pass-band tuning pipe extends and is secured thereto. A collar is attached to one end of the pipe, and at least one steel set screw extends into the interior of the collar, the at least one end having a soft (e.g., brass) tip. A tuning plunger is slidingly positioned within the pass-band tuning pipe. A rod is attached to a first end of the tuning plunger and extends through the collar, the rod being fabricated from a material harder than the tip of the at least one set screw. The at least one set screw is configured for tightening down on the rod to secure the rod and tuning plunger in place. A trimmer capacitor is positioned in the RF plate.

Abstract: A circulator and similar devices adapted for use in the transmission and reception of electromagnetic signals, such as microwave and RF signals. Beneficially, the circulator is formed from a single layer, comprising vias therein that all or some of which are filled with a ferrimagnetic material that is used to generate a magnetic field in a particular direction. The magnetic field is a vector sum of the magnetic field generated in each of the vias filled with a ferrimagnetic material that is biased with an external magnetic field in a specific direction to establish a preferred precessional motion of the material's constituent dipoles. This preferred precessional motion will govern the circulatory behavior and non-reciprocal properties of the device when an external signal is applied. As noted above, this magnetic field guides electromagnetic signals in a first direction that substantially prevents an electromagnetic signal from propagating in a second direction opposite the first direction.

Abstract: Disclosed are embodiments of microstrip and substrate integrated waveguide circulators/isolators which can be integrated with a substrate. This composite structure can serve as a platform for other components, allowing for improved miniaturization of components. Embodiments of the disclosure can be particular advantageous in the high frequency ranges, such as above 1.8 GHz or above 3 GHz, which allows devices to be used in the 5G space.

Abstract: Disclosed is an antenna impedance matching circuit, an antenna system, a printed circuit board, and a terminal. The antenna impedance matching circuit comprises: a first transmission line having a first specific length such that the first transmission line is capacitive, and a second transmission line having a second specific length such that the second transmission line is inductive. In particular, the first transmission line and the second transmission line are connected in parallel, and terminals of the first transmission line and the second transmission line are open or shorted.

Abstract: A coupler module (1) includes a first component (11) and a second component (21) that are mounted on a substrate. The first component (11) includes a coupler (100) having a main line and an auxiliary line, and the second component (21) includes an external circuit for processing a signal that flows into the main line or the auxiliary line and a plurality of first signal terminals (P5, P6) that are input and output terminals of the external circuit for the signal. The plurality of first signal terminals (P5, P6) are arranged in a first portion (A1) that is one of two portions (A1, A2) obtained by dividing the second component (21) and that is farther from the first component (11).

Abstract: A magnetically tunable ferrimagnetic filter, including a top casing, a top magnetic conductor, a bottom magnetic conductor, coils, a balance coil, ferrimagnetic-based filters, and a bottom casing. The ferrimagnetic-based filters utilize ferrimagnetic resonator elements, such as yttrium-iron-garnet (YIG), configured to reduce a magnetic gap of the YIG filter and thereby to improve performance.

Abstract: A magnetically-tunable ferrimagnetic radio frequency (RF) circuit sub-assembly can include a resonant cavity comprising a first magnetically conductive member spaced apart from a second magnetically conductive member, and a side wall. The sub-assembly can include first and second ferrimagnetic elements arranged in spaced apart relation within the resonant cavity. The sub-assembly can include a transmission line comprising a first portion located for RF coupling to the first ferrimagnetic element and a second portion located for RF coupling to the second ferrimagnetic element.

Abstract: A dual-band transform circuit structure includes a first transmission line, a second transmission line, and a conductive layer. The first transmission line has a first input terminal, a first output terminal, and a second output terminal. The second transmission line has a second input terminal, a third input terminal, a third output terminal, and a fourth output terminal. The second input terminal is coupled to the first output terminal, and the third input terminal is coupled to the second output terminal. The conductive layer is stacked with the first transmission and the second transmission line. The conductive layer includes a first hollow pattern. The first hollow pattern and the second transmission line are overlapped in a top view.

Abstract: A phase shifter includes a base substrate; a signal electrode, first and second reference electrodes all on the base substrate, and the first and second reference electrodes being respectively on two sides of a length direction of the signal electrode; an interlayer insulating layer on a side of the signal electrode away from the base substrate; and a phase control unit including a film bridge on a side of the interlayer insulating layer away from the base substrate. The signal electrode is in space enclosed by the base substrate and the film bridge, and two ends of the film bridge respectively overlap with the first and second reference electrodes in a direction perpendicular to the base substrate. The film bridge includes first and second anchor point areas and a functional area between the first and second anchor point areas, and has a hollow pattern in the functional area.

Abstract: A cross-coupling structure for dielectric cavity filters includes a base and a tuner. The base is communicated with plural resonant cavities, a side through hole and a blind hole, and has a first channel formed between two adjacent resonant cavities which are not used for producing cross-coupling, and a second channel the resonant cavities formed between two adjacent resonant cavities which are used for producing cross-coupling. The side through hole is penetrated through the base and communicated with the second channel. The blind hole is formed on a wall of the second channel and has an opening facing the side through hole. The tuner is entered into the second channel from the side through hole and extended into the blind hole and can be adjustably moved between the opening of the blind hole and the bottom of the blind hole to set a cross-coupling amount target value.

Abstract: A band pass filter includes a dielectric substrate, conductor plates, a ground via, waveguide resonators, and a trap resonator. The conductor plates are inside the dielectric substrate and opposed to each other. The ground via connects the conductor plates together. The waveguide resonators are coupled in series in a space between the conductor plates along a principal coupling path from an input terminal to an output terminal. Waveguide resonators adjacent along the principal coupling path are subjected to inductive coupling. The trap resonator couples waveguide resonators in two pairs included in the waveguide resonators as jumping over a portion of the principal coupling path, and capacitive couples the waveguide resonators included in each of the pairs.

Abstract: A radio frequency, RF, auto-transformer circuit (300, 700, 901) and method (1000) of constructing a RF auto-transformer are described. The RF, auto-transformer circuit (300, 700, 901) includes: an inner coil formed (1102) with a first metal layer (MT1) to create a first shunt inductor (302), wherein at least a portion of the inner coil is overlayed (1106) with a second metal layer (MT2) that creates a first series inductor (303) that exhibits inductive coupling to the first shunt inductor (302). An outer coil is formed (1104) with the first metal layer (MT1) that creates a second series inductor (304), where the outer coil is located adjacent the inner coil and provides inductive coupling between the second series inductor (304) and each of the first shunt inductor (302) and first series inductor (303).