Abstract: The present disclosure provides a wake-up receiver, including: a radio frequency filter configured to filter a composite signal including an input signal and a background noise signal to obtain a first filtered signal, the first filtered signal includes the input signal and a part of the background noise signal, and the input signal is a product of a modulated signal and a radio frequency carrier; a self-mixing oscillator connected to the radio frequency filter and configured to cause the first filtered signal to self-mix to obtain a mixed signal; an intermediate frequency filter connected to the self-mixing oscillator and configured to filter the mixed signal, so as to filter out the noise self-mixed signal in the mixed signal and obtain a second filtered signal, the second filtered signal includes the modulated signal; and a wake-up signal generation module connected to the intermediate frequency filter and configured to obtain a wake-up signal according to the modulated signal.

Abstract: Provided are a 3D filter circuit and a 3D filter. The 3D filter circuit includes a multilayer structure. The multilayer structure includes at least two conductive layers and at least one organic dielectric layer. Each organic dielectric layer is disposed between different conductive layers. The multilayer structure is configured to form at least one capacitor.

Abstract: A resonator includes an LC resonant unit and an embedded resonant unit. The LC resonant unit includes a resonant element. The resonant element includes a first portion, a second portion, and an interface between the first portion and the second portion. The first portion is connected to the second portion through the interface. The embedded resonant unit is embedded in the LC resonant unit through the interface.

Abstract: Provided are an antenna assembly and a communication system, relating to the technical field of antennas. The antenna assembly comprises a filter module and an antenna module, wherein the antenna module is connected to the filter module, and the antenna module is integrated with the filter module, wherein an output impedance of the filter module is matched with an input impedance of the antenna module.

Abstract: Disclosed are a filter production method and a filter, which relate to the technical field of wireless communication. In the above, the filter production method includes: providing a substrate structure; producing and forming a line structure on at least one side of the substrate structure, wherein the line structure includes at least one line layer, and at least one of the line layers has at least one inductor element; and producing and forming a capacitor structure and/or a resonator structure on the side of the at least one line layer close to the substrate structure and/or away from the substrate structure, wherein the capacitor structure includes at least one capacitor element, and the resonator structure includes at least one acoustic resonator. On the basis of the above method, the problem of relatively large integrated size existing in filters produced according to the prior art can be improved.

Abstract: Provided are tuning circuit and communication device. The tuning circuit includes tuning switch, ground patch point, and at least two sets of patch units. Each set of patch units at least includes a first patch point and a second patch point; the tuning switch comprises a standard port and at least one conversion port, and each set of patch units is connected to the corresponding conversion port; a first end of a first patch point and a first end of a second patch point in the same set of patch units are connected to the same conversion port; second ends of first patch points in different patch units are respectively connected to different contact points of an antenna; the second ends of all the second patch points are connected to the ground; and both ends of the ground patch point are respectively connected to the standard port and the ground.

Abstract: Provided are balun circuit structure and balun device, the balun circuit structure comprises unbalanced terminal, first and second balanced terminals, grounded power terminal, first, second, third and fourth inductors. The first terminal of the first inductor is connected to the first terminal of the second inductor, the second terminal of the first inductor is connected to the unbalanced terminal, the second terminal of the second inductor is open-circuited, the first terminal of the third inductor and the first terminal of the fourth inductor are connected to the grounded power terminal, the second terminal of the third inductor is connected to the first balanced terminal, the second terminal of the fourth inductor is connected to the second balanced terminal, the first, second, third and fourth inductors are located in different planes, respectively, the first inductor is coupled to the third inductor, and the second inductor is coupled to the fourth inductor.

Abstract: Provided is a chip inductor and manufacturing method thereof. The chip inductor includes: a pin layer, a plurality of insulating layers and a plurality of metal layers, where the insulating layers and the metal layers are arranged successively and alternately on the pin layer. Multiple patterned metal structures arranged in the plurality of metal layers are respectively electrically connected to form a multilayer plane spiral coil structure. The multilayer plane spiral coil structure has two ends electrically connected with respective pin structures in the pin layer.

Abstract: Provided are an antenna assembly and a communication system, relating to the technical field of antennas. The antenna assembly comprises a filter module and an antenna module, wherein the antenna module is connected to the filter module, and the antenna module is integrated with the filter module, wherein an output impedance of the filter module is matched with an input impedance of the antenna module.

Abstract: The present disclosure provides a filter circuit and an electronic device, and relates to the field of filters. The filter circuit can include a filter and a suppression ring, the suppression ring can be arranged around a periphery of the filter, the filter can include several grounded ports, each of grounded ports can be electrically connected to the suppression ring, and each of grounded ports can be grounded. The out-of-band rejection capability of the filter can be greatly improved by providing the suppression ring on the periphery of the filter and connecting each of grounded ports to the suppression ring before grounding.

Abstract: The present disclosure provides an acoustic resonator based on a high crystallinity doped piezoelectric thin film, including: a substrate; a seed layer arranged on the substrate, wherein the substrate and the seed layer form a Bragg reflection structure; a doped layer arranged on the seed layer; and a metal electrode arranged on the doped layer; wherein the seed layer is configured to increase a lattice matching degree between the doped layer and the substrate, and configured to reflect a sound wave emitted by the doped layer. The present disclosure further provides a method for preparing the acoustic resonator described above.

Abstract: Provided are a band-stop filter and a multi-frequency band-stop filter. The band-stop filter includes at least one band-stop filtering unit; the at least one band-stop filtering unit includes an input port, an output port, at least two resonators, and at least one inductive element; and the first terminal of the first resonator is connected between the input port and the inductive element, and the first terminal of the second resonator is connected between the output port and the inductive element.

Abstract: Provided by a bandpass filter circuit and a multiplexer. The bandpass filter circuit includes at least one electromagnetic LC filter circuit and at least one acoustic wave resonance unit. The at least one acoustic wave resonance unit includes an input port, an output port, at least one circuit element and at least three resonators. The at least one electromagnetic LC filter circuit is electrically connected to the at least one acoustic wave resonance unit, and the at least three resonators include at least one first resonator and at least one second resonator. In a case where the at least one first resonator includes one first resonator, the first resonator is connected in series between the input port and the output port.

Abstract: Provided are a band-pass filter circuit and a multiplexer. The band-pass filter circuit includes an electromagnetic LC filter circuit and acoustic resonance units. At least one of the acoustic resonance units each includes at least one first acoustic resonator and at least one second acoustic resonator. The first acoustic resonator is connected in series between the band-pass filter circuit and the electromagnetic LC filter circuit. Each of the at least one second acoustic resonator is connected to a terminal of the at least one first acoustic resonator, where the first terminal of the band-pass filter circuit serves as an input terminal or output terminal of the band-pass filter circuit. One or more of the acoustic resonance units are connected on an input side of the electromagnetic LC filter circuit; and the remaining of the acoustic resonance units are connected on an output side of the electromagnetic LC filter circuit.

Abstract: Provided are a 3D filter circuit and a 3D filter. The 3D filter circuit includes a multilayer structure. The multilayer structure includes at least two conductive layers and at least one organic dielectric layer. Each organic dielectric layer is disposed between different conductive layers. The multilayer structure is configured to form at least one capacitor.

Abstract: Provided are tuning circuit and communication device. The tuning circuit includes tuning switch, ground patch point, and at least two sets of patch units. Each set of patch units at least includes a first patch point and a second patch point; the tuning switch comprises a standard port and at least one conversion port, and each set of patch units is connected to the corresponding conversion port; a first end of a first patch point and a first end of a second patch point in the same set of patch units are connected to the same conversion port; second ends of first patch points in different patch units are respectively connected to different contact points of an antenna; the second ends of all the second patch points are connected to the ground; and both ends of the ground patch point are respectively connected to the standard port and the ground.

Abstract: A notch filter and a multi-frequency notch filter. The notch filter includes at least one notch filtering unit, each of the at least one notch filtering unit includes an input port, an output port, at least three resonators and at least one inductive element, and the at least three resonators include at least two first resonators and at least one second resonator. The at least two first resonators are connected in series to each other, the at least two first resonators in series are connected in series between the input port and the output port, a first end of each of the at least one second resonator is connected to a connection point between two adjacent first resonators, and a second end of the each of the at least one second resonator is connected to a fixed potential end.

Abstract: A filter structure and a filter device provided by the present application relate to the technical field of electronic devices. The filter structure includes: a shielding component, which includes a first shielding layer and a second shielding layer, which are arranged opposite each other at an interval; at least two resonance components, which are arranged at an interval, wherein each resonance component includes a resonance column and a resonance disk connected to the resonance column, and the resonance column is located between the first shielding layer and the second shielding layer and is connected to the first shielding layer; and a coupling enhancement component, which is respectively arranged at intervals from the first shielding layer and the second shielding layer, and is respectively connected to at least two resonance columns, so as to increase a coupling coefficient between the at least two resonance columns.

Abstract: A resonance circuit and a filtering device, which relate to the technical field of electronic devices. The resonance circuit includes: a connection port, wherein the connection port includes a first port and a second port; and a resonance unit, wherein the resonance unit includes at least one inductor element and at least one capacitor element, and the inductor element is connected to the capacitor element. The first port and the second port are respectively connected to the resonance unit, so as to form at least two branches which are connected in parallel, and at least one of the first port and the second port is not connected to any of the capacitor elements.

Abstract: Provided is an inductor stack structure. The inductor stack structure include a substrate; at least two metal layers sequentially stacked on one side of the substrate, each metal layer at least comprises a first plane inductor; a through hole, which is located between any two neighboring metal layers, first plane inductors in different metal layers are electrically connected through the through hole; and a thickness of the through hole is greater than that of the metal layer.