Abstract: Disclosed is a dielectric filter unit and a dielectric filter, where the dielectric filter unit includes a first dielectric resonant cavity and a second dielectric resonant cavity. The first dielectric resonant cavity is provided with a first frequency hole in an upper end face or a lower end face of the first dielectric resonant cavity, and the second dielectric resonant cavity is connected to the first dielectric resonant cavity and provided with a second frequency hole in an upper end face or a lower end face of the second dielectric resonant cavity. A coupling slot is provided at a joint of the first dielectric resonant cavity and the second dielectric resonant cavity, and a third frequency hole is provided at the joint of the first dielectric resonant cavity and the second dielectric resonant cavity.

Abstract: A filter includes a series arm resonator, parallel arm resonators, a multilayer substrate including main surfaces, a piezoelectric substrate, and a bump electrode on the piezoelectric substrate. Each of the parallel arm resonators include an IDT electrode on the piezoelectric substrate. The bump electrode is connected to the IDT electrode. The multilayer substrate includes a first planar electrode on a first of the main surfaces and bonded to the bump electrode, a second planar electrode on a second of the main surfaces and connected to a ground, and via conductors that connect the first and second planar electrodes. In a plan view of the first main surface, the bump electrode is between via conductors connected to the first planar electrode.

Abstract: Embodiments of the present disclosure provide a filter, an integrated passive device, an electronic device, and a display apparatus. The filter is applied in the field of radio frequency and includes: a first port, a second port, a first band-stop filter circuit, a low-pass filter circuit, a band-pass filter circuit, and a high-pass filter circuit. The first band-stop filter circuit is coupled to the first port, and is configured to perform out-of-band suppression on a signal input from the first port and input a signal subjected to the out-of-band suppression to the low-pass filter circuit. The low-pass filter circuit is configured to input a first signal, a frequency of which is between a first frequency and a second frequency, of the signal input by the first band-stop filter circuit to the band-pass filter circuit.

Abstract: An acoustic wave filter includes a first filter circuit on a first path and an additional circuit connected to the first path. The first filter circuit includes a series arm resonator and a longitudinally coupled resonator. The longitudinally coupled resonator includes a first acoustic wave resonator and a first reflector. The additional circuit includes a second acoustic wave resonator on the opposite side of the first acoustic wave resonator with respect to the first reflector. The second acoustic wave resonator includes a first end connected to the first path through a second path and a second end connected to ground. The series arm resonator is connected to a portion of the first path between a connection node at which the second acoustic wave resonator is connected to the first path and the longitudinally coupled resonator.

Abstract: The present application provides an adjustable radio frequency unit, a filter, and an electronic device. The adjustable radio frequency unit includes a first tunable dielectric layer and a second tunable dielectric layer; a first conductive layer located between the first tunable dielectric layer and the second tunable dielectric layer; a second conductive layer located on the side, away from the first conductive layer, of the first tunable dielectric layer; and a third conductive layer located on the side, away from the first conductive layer, of the second tunable dielectric layer; wherein orthographic projections of the first conductive layer, the second conductive layer and the third conductive layer on the first tunable dielectric layer at least partially overlap with one another. The adjustable radio frequency unit has the characteristic of passband adjustability and with high adjustment precision, good controllability, wide working frequency range, and low loss and cost.

Abstract: The invention discloses a waveguide power divider with a high-pass filtering function, and solves the problems of overlarge length dimension and incapability of placement in a narrow space after a conventional waveguide power divider is connected with a waveguide high-pass filter in a cascading manner.

Abstract: An adjustable phase shifter and a manufacturing method therefor, and an electronic device. The adjustable phase shifter includes: a first substrate and a second substrate, which are arranged opposite each other; an adjustable dielectric layer, which is arranged between the first substrate and the second substrate; a first electrode, which is located on the side of the first substrate facing the adjustable dielectric layer; and a second electrode, which is located on the side of the second substrate facing the adjustable dielectric layer, wherein an adjustable capacitor is formed in an overlap region between the first electrode and the second electrode.

Abstract: A phase shifter module is provided. The phase shifter module includes a dielectric, a plate, and a PCB including a metal pattern. The metal pattern includes a power divider having first and second transmission branches. The first transmission branch includes a first structure formed between a branch point of the power divider and an output terminal of the first transmission branch. The second transmission branch includes a second structure formed between the branch point of the power divider and the output terminal of the first transmission branch. The dielectric is disposed to overlap at least one of at least a portion of the first structure or at least a portion of the second structure. The dielectric is flexibly disposed so that a first region where the dielectric overlaps the first structure and a second region where the dielectric overlaps the second structure vary, according to movement of the plate.

Abstract: Multi-frequency capacitance cancellation in an acoustic filter circuit is provided. The acoustic filter circuit includes an acoustic resonator configured to resonate in a series resonance frequency to pass a radio frequency (RF) signal. However, the acoustic resonator may create an electrical capacitance that can cause the acoustic resonator to resonate at multiple operating frequencies outside the series resonance frequency, thus compromising performance of the acoustic resonator at these operating frequencies. Herein, a negative capacitance circuit is provided in parallel to the acoustic resonator and configured to present multiple negative capacitances to cancel (or at least reduce) the electrical capacitance at the operating frequencies. As a result, it is possible to improve the performance of the acoustic filter circuit across a broader frequency bandwidth.

Abstract: A negative differential phase shifter includes a first uncoupled transmission line, wherein the first uncoupled transmission line has a length of ?/2 at a center frequency; a first coupled transmission line, wherein the first coupled transmission line is operatively connected to the first uncoupled transmission line; and a second uncoupled transmission line, wherein the second uncoupled transmission line is operatively connected to the first coupled transmission line, and the second uncoupled transmission line is operatively connected to the first uncoupled transmission line.

Abstract: A system includes a first electrode with a first main portion extending along a longitudinal axis. A plurality of T-shaped sub-electrodes extend laterally from the first main portion with respect to the longitudinal axis. A plurality of inductive sub-electrodes extend laterally from the first main portion with respect to the longitudinal axis. The inductive sub-electrodes interdigitate with the T-shaped sub-electrodes to form an alternating pattern with the T-shaped sub-electrodes in a lengthwise direction with respect to the longitudinal axis. A second electrode with a second main portion extends parallel to the longitudinal axis, with a gap between the second electrode and the T-shaped sub-electrodes.

Abstract: A filter includes a substrate including a piezoelectric layer, and first and second signal electrodes, a filter circuit on a first path connecting the first signal electrode and the second signal electrode, and an additional circuit on a second path connected in parallel with at least a portion of the first path. The filter circuit includes one or more resonators and a main wiring line on the substrate, and the additional circuit includes a sub-wiring line and an acoustically coupled resonator on the substrate, the acoustically coupled resonator including acoustic wave resonators adjacent to each other. An insulating film is between the substrate and the sub-wiring line. A dielectric constant of the insulating film is smaller than a dielectric constant of the piezoelectric layer.

Abstract: In certain aspects, a receiver includes first amplifiers, wherein each one of the first amplifiers comprises an input and an output. The receiver also includes second amplifiers, wherein each one of the second amplifiers comprises an input and an output, and the outputs of the second amplifiers are coupled to a combining node. The receiver also includes transmission lines, wherein each one of the transmission lines is coupled between the output of a respective one of the first amplifiers and the input of a respective one of the second amplifiers. The receiver further includes a load coupled to the combining node, and receiver elements, wherein each one of the receiver elements comprises an input and an output, and the output of each one of the receiver elements is coupled to the input of a respective one of the first amplifiers.

Abstract: A spatial filter, a driving method thereof and an electronic device are provided, and belong to the field of wireless communication technology. The spatial filter of the present disclosure includes at least one filter structure; wherein each filter structure includes a first substrate, a second substrate opposite to the first substrate, and a dielectric layer between the first substrate and the second substrate; wherein the first substrate includes a first dielectric substrate and at least one first electrode on a side of the first dielectric substrate close to the dielectric layer; the second substrate includes a second dielectric substrate and at least one second electrode on a side of the second dielectric substrate close to the dielectric layer; and the at least one first electrode intersects with the at least one second electrode, which defines at least one resonant unit configured to filter an electromagnetic wave.

Abstract: A power divider includes an input port, a first output port, a second output port, a first phase adjusting part, a second phase adjusting part, and a matching part, wherein: the first phase adjusting part is connected in series between the input port and the first output port, and is configured to adjust a phase of a first output signal output by the first output port; the second phase adjusting part is connected in series between the input port and the second output port, and is configured to adjust a phase of a second output signal output by the second output port; the matching part is connected in series between the first output port and the second output port, and is configured to match the first output port with the second output port; a phase difference between the first output signal and the second output signal is 180 degrees.

Abstract: A multi-embedded circuit board includes a first circuit board and a first cold plate thermally coupled to the first circuit board. The first circuit board includes a substrate and a power amplifier within the substrate, the power amplifier electrically coupled to one or more electromagnetic signal interfaces. The first cold plate includes one or more first cooling elements configured to extract heat from the power amplifier.

Abstract: A compact feed system (600) is provided which comprises an orthomode transducer or junction (400) and a waveguide H-plane directional coupler (100). The waveguide H-plane directional coupler may comprise two hollow waveguide sections (110, 120) and a coupling section (130) arranged in between the two hollow waveguide sections for coupling a signal from one hollow waveguide section to another hollow waveguide section. In a transverse cross-section of the waveguide H-plane directional coupler, the hollow waveguide sections may be angled towards the coupling section and delimit a recess (20) formed at an inner side of the waveguide H-plane directional coupler. The orthomode transducer or junction (400) may be positioned at least partially in the recess to increase compactness of the feed system.

Abstract: A switching module assembly is provided. The switching module assembly includes a plurality of transmit/receive terminals, an antenna terminal, a shunt indictor coupled to the antenna terminal, a plurality of duplexers coupled to the plurality of transmit/receive terminals, and a plurality of impedance rotation elements coupled to the plurality of duplexers. Each duplexer corresponds to a signal frequency of a plurality of signal frequencies, and the impedance rotation elements are configured to adjust the impedance of each duplexer in conjunction with the shunt inductor to provide a resonant frequency at the signal frequency of each duplexer. The switching module can be used in the front-end module of a communications device, such as a mobile phone.

Abstract: A microwave filter includes a multilayer stack. The multilayer stack includes one or more first-type layers composed of a first superconductor material having a first superconducting critical temperature; and one or more second-type layers composed of a non-superconductor metal or a second superconductor material having a second superconducting critical temperature that is lower than the first superconducting critical temperature. The multilayer stack is configured to behave as a dissipative metal for photons having a frequency above twice a superconducting gap frequency of the multilayer stack and to behave as a superconductor for photons having a frequency below twice the superconducting gap frequency of the multilayer stack.

Abstract: A conductive assembly may include a deformable substrate disposed around an axis, and a deformable conductor arranged on the deformable substrate. The substrate may be arranged to form a channel along the axis, and the deformable conductor may be arranged on the deformable substrate to form a waveguide. The deformable substrate, the first deformable conductor, and a second deformable conductor may be arranged to form a microstrip or a coaxial transmission line. A deformable transmission line may include a deformable substrate arranged in a substantially enclosed channel around an axis, a first deformable conductor arranged in a trace along the axis of the deformable substrate, and a second deformable conductor arranged on the deformable substrate to form a reference conductor for the first deformable conductor. A method of fabricating a deformable conductive assembly may include forming a deformable conductor on a deformable substrate, and disposing the deformable substrate around an axis.