33 results about "Resonator filter" patented technology

An ESA antenna includes a layer of filters between the layer of radiating elements and the ground layer. The filter layer obviates certain post processing steps. The filters define a passband at the operating range of the antenna and a stopband defined to prevent crosstalk or reduce known external interference. Each filter includes alternating cells of a resonator cell formed by two split ring resonators and a resonator cell formed by a complementary split ring resonator and a complementary patch / stub. A particular implementation of the filter defines an operating range around 23 gigahertz with a passband to stopband transition of less than 500 megahertz. Vias may connect the filter layer to a surface component layer with beamforming integrated circuits, bypassing the routing layer.

One example includes an acoustic resonator filter system. The system includes a filter element arranged between a low-voltage rail and a filter-path node through which an RF input signal propagates to provide a filtered RF output signal. The filter element includes an acoustic resonator and a capacitive network arranged in parallel with the acoustic resonator.

A short-circuit rectangular metal patch and a dielectric slot act on a cavity-backed substrate integrated dielectric resonator, and by utilizing a newly-added mode of the short-circuit rectangular metal patch and a matching effect of the short-circuit rectangular metal patch and the dielectric slot on a slot mode and an adjusting effect of the short-circuit rectangular metal patch and the dielectric slot on amplitude distribution of an electric field of four modes, the broadband stable beam broadening dielectric resonator filtering antenna is obtained. By combining a low-frequency out-of-band radiation zero point generated by the whole resonator and a high-frequency out-of-band wave limiting effect of the U-shaped groove, the broadband wide-beam dielectric resonator antenna is realized, and the broadband wide-beam dielectric resonator antenna has the advantages of broadband stable beam broadening and integration of a filtering function, and can simultaneously take substrate integration and low profile into account.

The application discloses a manufacturing method of a resonant filter. The method comprises the following steps: manufacturing a first substrate and a resonant filter structure, wherein the resonant filter structure is formed on a first side of the first substrate, the resonant filter structure comprises a bulk acoustic wave resonant structure and a Lamb wave resonant structure, the bulk acoustic wave resonant structure and the Lamb wave resonant structure are electrically connected, the bulk acoustic wave resonant structure comprises a first electrode structure, the Lamb wave resonant structure comprises a second electrode structure, the second electrode structure comprises a first interdigital electrode and a second interdigital electrode, the first electrode structure and the second electrode structure share a same first electrode layer, the first interdigital electrode is electrically connected with the outside, and the second interdigital electrode is electrically connected with the first electrode structure.

A coupled resonator filter including a first parallel resonator including a first capacitance connected in parallel with a first inductance. The filter includes a second parallel resonator including a second capacitance connected in parallel with a second inductance and a third parallel resonator including a third capacitance connected in parallel with a third inductance. Magnetic coupling between the first inductance and the second inductance, between the second inductance and the third inductance, and between the first inductance the third inductance occurs in accordance with first, second and third coupling factors, respectively. A frequency response of the coupled resonator filter includes a notch when values of the first coupling factor, the second coupling factor and the third coupling factor satisfy predetermined conditions.

The invention relates to the technical field of circuits, in particular to a resonator filter structure, a preparation method and a filter. The resonator filter structure comprises a substrate and a circuit structure integrated on one side of the substrate, the substrate comprises a resonator region and a capacitor region; the resonator area is provided with a resonator circuit structure, and the capacitor area is provided with a capacitor structure; the acoustic mirror in the resonator circuit structure and the capacitor dielectric layer of the capacitor structure are both air and are formed through the same sacrificial layer deposition and release process.

Systems and methods for impedance shifting between a filter and an amplifier are disclosed. In one aspect, an active inductor, which may otherwise be placed between a filter and a low noise amplifier (LNA), may be replaced with a passive impedance enhancement circuit. The impedance enhancement circuit may be, for example, a passive voltage gain circuit, and, as another example, may be implemented with a coupled resonator filter (CRF) structure. The use of such a passive voltage gain structure in a receive circuit whose input noise is primarily determined by the noise voltage component means that any passive voltage gain prior to the active amplifier will result in a reduction in the overall receive path noise index, and may potentially save the space that would otherwise be dedicated to large inductor circuits.

Hybrid lattice filters with acoustic baluns are disclosed. In one aspect, a hybrid lattice filter may be formed using acoustic elements. The hybrid lattice filter may operate with acoustic baluns such as coupled resonator filters (CRF) or stacked crystal filters (SCF). To achieve the desired common mode rejection, an additional rejection or low common mode intermediate impedance network may be supplied between the acoustic balun and the hybrid lattice filter. By combining the acoustic balun with the low common-mode intermediate impedance network and the hybrid lattice filter, a passband filter with a desired bandwidth may be created.

One example includes an acoustic resonator filter system. The system includes a plurality of filter blocks. Each of the filter blocks can include a plurality of tunable filter elements. Each of the tunable filter elements can include an acoustic resonator. The system also includes a switching network that receives a radio frequency (RF) input signal and provides a filtered RF output signal. The switching network can be configured to selectively switch at least one of the filter blocks in a signal path of the RF input signal to provide the RF output signal.

The invention discloses a filter network based on external active group delay regulation and control equalization, which comprises a fourth-order microstrip split ring resonator filter network to be subjected to phase calibration, a 3dB bridge, two single-port reflection type split ring resonators and two active feedback amplification loops, the output end of the fourth-order microstrip split-ring resonator filter network is coupled with one port of the 3dB bridge, ports of the two single-port reflection-type split-ring resonators are connected with the other two ports of the 3dB bridge respectively, and the last port of the 3dB bridge serves as a microstrip output port. The two active feedback amplification loops and the two single-port reflection type split ring resonators are in one-to-one correspondence and weak coupling. According to the method, the working characteristics of the single-port reflection type split ring resonator are utilized, the group delay characteristic of the resonator acts on the to-be-calibrated filter network when the resonator resonates, the group delay characteristic of the resonator is superposed with the group delay characteristic of the to-be-calibrated filter network, and then the linear phase filter network with flat group delay is obtained; and meanwhile, an active feedback amplification loop is utilized, a reflected signal acts on the filter circuit through a single-ended split-ring resonator and a 3dB bridge, and the loss of the to-be-calibrated and regulated filter network is compensated, so that the overall transmission performance of the filter network is improved.

A coupled resonator filter including a first parallel resonator including a first capacitance connected in parallel with a first inductance. The filter includes a second parallel resonator including a second capacitance connected in parallel with a second inductance and a third parallel resonator including a third capacitance connected in parallel with a third inductance. Magnetic coupling between the first inductance and the second inductance, between the second inductance and the third inductance, and between the first inductance the third inductance occurs in accordance with first, second and third coupling factors, respectively. A frequency response of the coupled resonator filter includes a notch when values of the first coupling factor, the second coupling factor and the third coupling factor satisfy predetermined conditions.

The present invention relates to a fault signal detection system of target equipment using a resonance filter, which can precisely detect a fault signal of a coil in the target equipment regardless of frequency resolution, and can greatly improve a signal-to-noise ratio. To this end, provided is a detection device which detects a fault signal that may occur in a target coil (30) of the target equipment, comprising: a tuning capacitor (150) which is connected in series between a coil power source (120) and a coil inductor (160) with respect to a coil power source (120), the coil inductor (160), and a coil resistor (180) of the target coil (30), and is capable of tuning a frequency of the resonance filter; and a matching capacitor (140) which is connected to the coil power source (120) in parallel and can be matched with the frequency of the resonance filter, and thereby, a signal-to-noise ratio (SNR) may be further increased when the fault signal in the frequency domain passes through the resonance filter.

Structures for a micro-ring resonator filter and methods of forming a structure for a micro-ring resonator filter. The structure comprises a bus-ring coupling section including a first Mach-Zehnder interferometer, and a micro-ring resonator section including a ring resonator coupled to the first Mach-Zehnder interferometer. The ring resonator includes a second Mach-Zehnder interferometer.

The application discloses a parameter optimization method of a W-waveband wideband low standing wave ratio resonant filter network and relates to the field of resonant filter parameter optimization. The application adopts a variation method to optimize design variables, and utilizes the influence of the partial derivative of an objective function on design parameters to realize a more efficient optimization process, thereby reducing the standing wave ratio and the insertion loss.

A bulk acoustic wave resonator filter is provided. The bulk acoustic wave resonator filter includes: a series bulk acoustic wave resonator electrically connected in series between a first port and a second port through which a radio frequency signal passes; a second shunt bulk acoustic wave resonator electrically connected in shunt between the series bulk acoustic wave resonator and a ground, and having a resonant frequency lower than a resonant frequency of the series bulk acoustic wave resonator; and a first shunt bulk acoustic wave resonator electrically connected in shunt to the second shunt bulk acoustic wave resonator and having a resonant frequency higher than the resonant frequency of the second shunt bulk acoustic wave resonator. One or both of the series bulk acoustic wave resonator and the first shunt bulk acoustic wave resonator includes: a first electrode disposed above a substrate; a piezoelectric layer disposed on an upper surface of the first electrode; a second electrode disposed on an upper surface of the piezoelectric layer; and a trench formed in or above the second electrode and recessed downward.

The application discloses an energy generator topology and a control method thereof, and belongs to the field of energy generator design. The energy generator topology comprises an adjustable DC power supply, an input capacitor, an H-bridge circuit, a resonance filter, a current sampling transformer and a controller. The adjustable DC power supply outputs electric energy to an external bipolar plasma knife through the input capacitor, the H-bridge circuit and the resonance filter. The current sampling transformer collects the current value of the resonance filter output to the bipolar plasma knife in real time and outputs the current value to the controller. The controller receives the current value and determines the load state of the bipolar plasma knife. According to the load state, the working frequency of the switching device of the H-bridge circuit is controlled, so that the energy generator provides adaptive electric energy output for the bipolar plasma knife. The application can reduce the high current stress and thermal stress impact of high peak power on the energy generator, thereby greatly reducing the volume of the energy generator.

One example includes an acoustic resonator filter bank system. The system includes a multiplex passive filter that is configured to provide a plurality of filtered versions of a radio frequency (RF) input signal. The system also includes a filter bank that comprises a plurality of filter blocks that are each configured to provide a plurality of pass-bands across a frequency spectrum. Each of the filter blocks includes an acoustic resonator. The system further includes a switch matrix that is configured to provide one of the filtered versions of the RF input signal to one of the filter blocks in the filter bank to provide an RF output signal having a frequency band corresponding to a respective one of the pass-bands.

A galvanometer motor control method based on resonant filtering and a Luneburg observer, relating to the field of motor control, is disclosed. The drive control system of the galvanometer motor includes a position PI controller, a resonant filter, a speed PI controller, a current PI controller, and a DA conversion drive circuit connected in sequence, and a Luneburg observer positioned between the resonant filter and the speed PI controller. The method includes the following steps: the position PI controller processes position-related information; the resonant filter performs resonant filtering on the parameters output by the position PI controller; the Luneburg observer introduces an observation gain matrix to stabilize itself and estimates the speed; and the speed PI controller processes the speed estimate to generate the voltage controlling the galvanometer motor. This invention employs coordinated control of position, speed, resonant filter, Luneburg observer, and current, enhancing the system's dynamic performance, reducing inter-loop coupling effects, and improving control accuracy.

The utility model relates to a radio frequency filter and communication equipment, and the radio frequency filter comprises a first signal transmission end, a second signal transmission end, a filter network, a coupled resonator filter, and a suppression lifting unit. The filter network is arranged between the first signal transmission end and the second signal transmission end and comprises a plurality of series branches and at least one parallel branch; each series branch comprises at least one series surface acoustic wave resonator, and each parallel branch comprises at least one parallel surface acoustic wave resonator; the coupling resonant filter is arranged between the series branch closest to the second signal transmission end and the second signal transmission end; and a suppression lifting unit is connected between the second signal transmission end and the ground so as to generate a zero point on the high-frequency side of the pass band of the radio frequency filter.

The present invention belongs to the field of filter technology and specifically discloses a three-dimensional micro-metal structure hybrid resonator filter, comprising a metal housing; a first cavity resonator, a second cavity resonator, a third cavity resonator, and a fourth cavity resonator arranged in a ring within the housing, with a transmission line resonator located between the second and third cavity resonators; an output coupling structure and an input coupling structure are micro-coaxial line-board-level welded adapter structures and are respectively arranged on either side of the housing, with the input coupling structure connected to the first cavity resonator and the output coupling structure connected to the fourth cavity resonator; after the input coupling structure feeds a signal into the first cavity resonator of the filter, the fourth cavity resonator feeds the signal into the output coupling structure. The filter of the present invention is small in size and has the advantages of low loss, high selectivity, and a wide range of applications.

Technologies are described for a light emitting diode (LED) driver configured for powering LED(s) and having a wide input voltage range between about 100V and about 528V, high power factor, low total harmonic distortion (THD), and low output current ripple load. The LED driver has a single stage buck-boost type converter with output current regulation, an output current regulation circuit, a ripple control circuit having a transient voltage suppressor (TVS) and a parallel resonant LC filter, a power factor correction (PFC) control circuit having a digital compensation block, a PFC controller, and a gate drive IC.

Provided is an elastic wave device having an elastic wave resonator and a longitudinal coupling type elastic wave resonator filter, which can more effectively suppress a lateral mode. An elastic wave device (1) has an elastic wave resonator (5) and a longitudinal coupling type elastic wave resonator filter (6), and the length of the first and second edge regions (C1, C2) in the IDT electrode, which is the dimension in the direction in which the electrode fingers (21, 22) extend, is set shorter in the longitudinal coupling type elastic wave resonator filter (6) than in the elastic wave resonator (5).

A linear waveguide layer (22), a coupling layer (21), and an annular waveguide layer (23) are continuously formed on a semiconductor substrate (9). The annular waveguide layer (23) and the coupling layer (21) are etched to form an annular waveguide (8). The linear waveguide layer (22) is subjected to anisotropic wet etching to form a linear waveguide (7). The ring waveguide (8) and the linear waveguide (7) are optically coupled via a coupling layer (21) to constitute a ring resonator filter (5). When anisotropic wet etching is performed on the linear waveguide layer (22), the linear waveguide layer (22) below the annular waveguide (8) is removed in a region not covered by the linear pattern (25) using a chemical solution having selectivity in the direction in which the linear pattern (25) extends with respect to the linear waveguide layer (22).

The application relates to a high-Q resonant filter based on an LTCC process, the most core part of the architecture is composed of a resonant unit A, a resonant unit B and an inter-stage coupling unit to form a basic resonant coupling filter unit, wherein the resonant unit innovatively introduces multiple hole columns in parallel to form an equivalent large via, thereby greatly improving the Q value of resonant inductance, and by adjusting the size of the hole column coil and the distance between the hole column coils, the magnetic coupling strength of adjacent resonant units can be adjusted, and by further adjusting the size of the inter-stage coupling capacitor, the overall coupling strength of the inter-stage coupling unit can be flexibly adjusted, and the cross-stage coupling capacitor can be flexibly adjusted to deepen the single-side rectangular coefficient; in addition, the application adopts a mirror-symmetrical layout mode in the internal structure, reasonably optimizes the internal space structure, reduces the design and debugging difficulty and avoids errors in the production process, so that the high-Q LC resonant coupling filter has better controllability and a better rectangular coefficient.

A composite filter device includes first and second filter chips mounted on an upper surface of a substrate by first and second conductive bonds. The first filter chip includes a longitudinally coupled resonator filter. The second filter chip does not include a longitudinally coupled resonator filter. A height of the first conductive bond is lower than a height of the second conductive bond.

A balun for a power amplifier is disclosed. In one aspect, a balun based on acoustic coupled resonator filters (CRFs) has a 4:1 impedance ratio between an unbalanced side and a balanced side. As such, the balun is well suited for use between power amplifiers and filters. The 4:1 ratio is achieved through one or more design options, including material selection, material thickness selection, series versus shunt inductor positions, CRF topology selection, or the like. The overall size is reduced relative to non-CRF baluns providing more room in a mobile device for other components or batteries.

The invention discloses an adjustable resonant filter and a communication system, and relates to the technical field of communication, and the disclosed tunable filter comprises an optical resonant structure and at least one layer of lithium niobate film. The lithium niobate thin film is arranged in an optical resonance structure; the lithium niobate film is electrically connected with the electrode; the tuning voltage applied by the electrode is received through the lithium niobate film, and the refractive index is changed based on the electro-optical effect generated by the tuning voltage, so that the resonant wavelength of the optical resonant structure is adjusted. The electro-optical effect of the lithium niobate film is directly utilized, and the refractive index of the lithium niobate film can be instantaneously changed by applying an electric field, so that tuning of resonant wavelength is realized, physical process time required by mechanical movement or an electrothermal effect is avoided, and the response speed is effectively improved.

An acoustic wave filter having a coupled resonator filter is provided. The acoustic wave filter includes an acoustic coupling unit, a first unit of resonators disposed on a first side of the acoustic coupling unit, and a second unit of resonators disposed on a second side, opposite the first side, of the acoustic coupling unit. The first unit of resonators and the second unit of resonators are in an acoustic communication. The first unit of resonators includes a first resonator and a second resonator electrically coupled to the first resonator. The first resonator comprises a first electrode and a second electrode, and wherein the second electrode of the first resonator is disposed adjacent to the acoustic coupling unit and is configured to receive a signal input. A wireless device may include the acoustic wave filter.

Provided is a quadruple-mode resonator capable of having a reduced resonator height. In this quadruple-mode resonator 1, electromagnetic field energy is confined in an outer peripheral conductor 2 forming a rectangular parallelepiped having a height smaller than the length and width thereof. The quadruple-resonant modes are the four modes of TM120, TM210, TE101, and TE011, with the height direction as the propagation direction of electromagnetic waves. A cross-shaped conductor plane pattern 3 is horizontally disposed at the center portion of the outer peripheral conductor 2. Inter-TE mode coupling conductors 4 are provided that each have one end connected to a side surface of the outer peripheral conductor 2 and are disposed horizontally. TM / TE mode coupling conductors 5 are provided that each have two ends connected to the lower surface and a side surface of the outer peripheral conductor 2. Two electric field probe input / output terminals 6 are provided that are insulated from the outer peripheral conductor 2 and inserted into the outer peripheral conductor 2 through the upper surface thereof.

The invention relates to the technical field of circuits, in particular to a resonator filter structure based on a supporting structure, a filter and electronic equipment. The resonator filter structure based on the supporting structure comprises a substrate and a circuit structure integrated on one side of the substrate, the substrate comprises a resonator region and a capacitor region; the resonator area is provided with a resonator circuit structure, and the capacitor area is provided with a capacitor structure; an acoustic mirror in the resonator circuit structure and a capacitor dielectric layer of the capacitor structure are air; one electrode layer of the capacitor structure and one electrode layer of the resonator circuit structure are connected with each other, and are formed through the same deposition process after deposition and graphical processing; the resonator circuit structure comprises at least one resonance unit; the resonator filter structure based on the supporting structure further comprises the supporting structure used for supporting the upper electrode layer of the capacitor unit in the capacitor structure.