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3234 results about "Resonator" patented technology

A resonator is a device or system that exhibits resonance or resonant behavior. That is, it naturally oscillates with greater amplitude at some frequencies, called resonant frequencies, than at other frequencies. The oscillations in a resonator can be either electromagnetic or mechanical (including acoustic). Resonators are used to either generate waves of specific frequencies or to select specific frequencies from a signal. Musical instruments use acoustic resonators that produce sound waves of specific tones. Another example is quartz crystals used in electronic devices such as radio transmitters and quartz watches to produce oscillations of very precise frequency.

Energy harvesting acoustic metasurface using piezoelectric transducers

The technology described herein is directed towards resonators that incorporate or are closely coupled to transducers from which energy is harvested. The resonators can be unit cells of a metasurface configured for narrowband sound absorption by phase cancellation of the acoustic wave Electroacoustic transducers such as piezoelectric transducers can be positioned, e.g., at the neck ports of the resonators, to generate electricity as the air pressure of incoming acoustic waves enters the unit cells. Energy can be harvested from the electricity, and stored for usage and / or used directly to power a device. Such a device powered by the harvested energy can change the resonant frequency of the device, e.g., by changing temperatures in the resonators' air cavities, changing respective dimensions of the respective air cavities, or changing the resonant frequency of the unit cells resonators by changing respective airflow in the respective air cavities.
Owner:DELL PROD LP

Adaptive, Modular, and Secure Multi-Modal Communication and Computing System with Integrated Environmental Resilience for Terrestrial, Maritime, Airborne, Orbital, and Deep-Space Deployment

PendingUS20260081635A1Radio transmissionElectromagnetic transmittersMultimodal communicationHot swapping
An adaptive modular multimodal communication and computing panel includes a multilayer stack with a protective layer transmissive in selected bands, a reconfigurable communication layer operable in phased array, reflectarray, hybrid phased reflector, free space optical, or quantum modes, and electronics with heterogeneous processors. A multi scale interconnect and input and output fabric couples electrical, radio frequency, guided optical, and free space optical domains through interfaces including electro optic transduction and RF or baseband conversion. The fabric may implement programmable true time delay, resonators, and comb referenced timing. A management system coordinates beamforming, sensing, routing, calibration, workload placement, and security. Panels tessellate and connect by electrical, radio frequency, and fiber optic interfaces, supporting hot swappable modules, blind mate connectors, robotic servicing, and anti tamper features. Power and thermal subsystems harvest, store, regulate, and dissipate energy. The architecture scales from chip level modules to vehicle, airborne, maritime, orbital, and deployable systems.
Owner:HYPERSPACE SYSTEMS INC

Dynamic phased array resonator systems and methods for determining a material substance

Embodiments described relate to a system for material detection and identification, The system may include a transmitter unit configured to transmit an RF signal at a resonance frequency for a material. The system may also include a phased array antenna assembly, the phased array antenna assembly configured to receive a response signal. The system may also include a receiver unit configured to analyze the response signal and to identify the material to a user if the presence of the material is indicated by the resonance characteristics. The techniques described herein relate to a method for material detection and identification. The method may include configuring a transmit signal for parameters to detect a material; sending the transmit signal to a phase shifter; transmitting, using a phased array antenna assembly, an RF signal at a resonance frequency for the material; processing the response signal; and outputting an identification of the material.
Owner:QUANTUM IP LLC

Nonlinear all-optical machine learning systems and methods using nonlinear optical resonator-based neurons

A nonlinear all optical machine learning system (NAOMLS) with nonlinear optical resonator-based continuous wave and / or spiking neurons (NORs) and linear optical components or layers (LOL) learns to implement target tasks after machine learning based direct and / or indirect inverse design and / or optimization of the NORs and / or optimization of the LOL. The inversely designed and / or optimized NORs and the optimized LOL collectively define learnable mapping functions between input lights and output lights of the NAOMLS to meet target objectives for target tasks. In some embodiments, the NORs are indirectly and inversely designed to meet inversely designed objectives in order to be integrated with the NAOMLS so that the NAOMLS can function properly to meet target objectives for target tasks. In some embodiments, the NORs are integrated directly with the NAOMLS and inversely designed and / or optimized with the LOL to directly meet target objectives for target tasks.
Owner:TAN YONGXI

Data enhancement prediction method for thermoelastic quality factor of micro-hemispherical resonator

PendingCN121302933AGeometric CADDesign optimisation/simulationThermodynamic simulationBlow molding
The invention relates to the technical field of data processing, in particular to a data enhancement prediction method for the thermoelastic quality factor of a micro-hemispherical resonator, which comprises the following steps: S1, determining the radius size of the manufactured micro-hemispherical resonator, determining the simulation value range of the radius and thickness of an anchor point of the resonator, and determining the simulation value range of the thickness of the resonator; harmonic oscillators with different geometric boundary dimensions are established through high-temperature blow molding simulation; s2, thermodynamic simulation is carried out on the harmonic oscillator appearance obtained through blow molding simulation, and a harmonic oscillator thermoelastic quality factor data set is established; s3, performing data enhancement on the thermoelastic quality factor data set by adopting a cubic polynomial fitting method; and S4, training the enhanced thermoelastic quality factor data set by using a deep learning model to obtain a harmonic oscillator thermoelastic quality factor prediction model. According to the method, the bottleneck of scarcity of high-precision simulation data is broken through, unification of high precision and high efficiency is realized, the robustness and reliability of a prediction model are improved, and the method has wide engineering applicability and popularization value.
Owner:ZHEJIANG UNIV

Welding method and device for assembled hemispherical harmonic oscillator

The invention relates to the technical field of hemispherical harmonic oscillator assembly, in particular to a welding method and device for an assembled hemispherical harmonic oscillator, and the device comprises a vibration welding platform and a clamping assembly located above the vibration welding platform; the vibration welding platform is used for bearing the sensitive base and providing a thermal field and a vibration field needed by welding, and the clamping assembly is used for clamping the center shaft and sending the center shaft into a center hole of the base. A heating unit and a composite vibration ultrasonic transducer are arranged in the platform, and the platform is configured to apply high-frequency vibration formed by superposition of vertical longitudinal waves and horizontal torsional waves to the base. The high-frequency vibration thixotropic effect is used for reducing the viscosity of the molten solder, the ultrasonic cavitation effect is used for forcibly discharging bubbles at the bottom of the blind hole, and the sound radiation pressure generated by the vibration standing wave field is used for driving the center shaft to achieve friction-free self-centering in the hole. According to the device, the problems of air bolt pseudo soldering and rigid assembly clamping stagnation in the traditional process are solved, and the assembly coaxiality and the connection strength of the harmonic oscillator are remarkably improved.
Owner:SICHUAN TURIN TECH CO LTD

Reducing audible noise generated by components of computed tomography imaging system

A computed tomography imaging system (102) includes a gantry (104). The computed tomography imaging system also includes a rotating frame 106 rotatably supported in the gantry. The rotating frame comprises an X-ray source (114) and an X-ray radiation sensitive detector (120), the X-ray source being configured to emit X-ray radiation traversing an examination region, the X-ray radiation sensitive detector is disposed opposite the X-ray source across the examination region and is configured to detect X-ray radiation traversing the examination region and to generate a signal indicative of the detected X-ray radiation. The computed tomography imaging system also includes at least one component (202, 214) of the gantry or rotating frame that generates audible noise. The computed tomography imaging system also includes an audible noise reducer (128) configured to reduce the audible noise. The audible noise reducer includes a resonator that is tuned to a first frequency of the audible noise.
Owner:GE PRECISION HEALTHCARE LLC

Crystal resonator sputter coating device and preparation method of crystal resonator

The invention discloses a crystal resonator sputter coating device and a preparation method of a crystal resonator, and belongs to the field of electronic components, the crystal resonator sputter coating device comprises a bottom plate, a lower electrode mask plate, a positioning plate, an upper electrode mask plate and a magnetic cover plate in sequence, the positioning plate is provided with a wafer positioning groove, a wafer is installed in the wafer positioning groove, and the magnetic cover plate is provided with a magnet. The upper electrode mask plate and the lower electrode mask plate are both provided with electrode holes, the thickness of the positioning plate is recorded as h < definite >, and one surface of at least one of the upper electrode mask plate and the lower electrode mask plate, which faces a wafer, is provided with a diffusion prevention bulge for preventing diffusion of electrode particles during film coating, and the thickness of the diffusion prevention bulge is recorded as h < definite >. The size of the dispersion preventing protrusion is matched with the size of the wafer positioning groove, the dispersion preventing protrusion is located in the wafer positioning groove during assembly, the thickness of the wafer is recorded as h wafer, and h wafer lt is smaller than or equal to 0.017 mm; and h, setting. The sputtering coating device solves the problem of electrode diffusion of the high-frequency crystal resonator in the existing sputtering coating device for the crystal resonator due to too small wafer thickness.
Owner:CHENGDU KINGBRI FREQUENCY TECH

Asymmetric coupling stiffness disturbance type MEMS modal localization accelerometer and detection method

The invention discloses an asymmetric coupling rigidity disturbance type MEMS modal localization accelerometer and a detection method. The accelerometer comprises an upper signal conversion layer and a lower glass substrate layer. The upper signal conversion layer comprises a sensitive mass block, a supporting structure and asymmetrical coupled resonator pairs which are symmetrically distributed. According to the asymmetric coupling resonator pair, a first type resonator and a second type resonator form a weak coupling system through electrostatic coupling, the first type resonator is fixed to a glass substrate layer through anchor points, the second type resonator is fixed to a sensitive mass block, and the first type resonator and the second type resonator meet the mass and rigidity asymmetric relation. When being subjected to the acceleration effect, the sensitive mass block generates micro displacement, changes the static coupling rigidity and triggers the modal localization effect, so that the amplitude ratio of the two resonators is changed, and acceleration measurement is realized by detecting the amplitude ratio change. By adopting the asymmetric structure, the sensitivity of the accelerometer is doubled compared with that of a symmetric structure, and meanwhile, the accelerometer has good linearity and anti-interference capability.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Active optical resonator for frequency conversion

An optical parametric oscillator and method for generating coherent signal light involve a resonant optical cavity for coherent signal light, and in the cavity a non-parametric gain element for amplifying the coherent signal light to only partially compensate for passive optical roundtrip losses, thereby obtaining lower effective roundtrip losses. A parametric gain element is arranged in the cavity, for converting coherent pump light into coherent signal light through an instantaneous nonlinear optical interaction. The parametric oscillator has means for adjusting an intracavity optical power of the coherent pump light above a threshold value, where the parametric gain is balancing the effective roundtrip losses, thus inducing sustained oscillations of the signal light in the optical cavity. The non-parametric gain element is configured to have a limited non-parametric gain over a gain bandwidth of the parametric gain element, which is less than the passive optical roundtrip losses in the gain bandwidth.
Owner:UNIV LIBRE DE BRUXELLES

Temperature compensation equalizer with adjustable equalization slope linearity

The invention discloses a temperature compensation equalizer with adjustable equalization slope linearity, and relates to the technical field of microwave integrated circuits. The equalizer comprises a temperature compensation driving module and a temperature compensation equalization module. The temperature compensation driving module generates a control voltage changing along with the temperature by using the negative temperature characteristic of the diode. The temperature compensation equalization module comprises an equalization circuit formed by resonators and a pair of stacked switch tubes, and realizes a temperature compensation function by controlling voltage to adjust insertion loss; meanwhile, by changing the capacitance value of the equalization slope linearity adjusting capacitor C3 which is connected with the series resonator in parallel, the linearity of the equalization slope can be flexibly adjusted on the premise that the equalization quantity is kept unchanged. According to the invention, the temperature compensation and equalization functions are integrated, the structure is compact, the performance is stable, the slope linearity can be flexibly adjusted, and the device is suitable for gain frequency and temperature compensation in a broadband radio frequency link.
Owner:CHENGDU GANIDE TECH

Polarization diverse receiver with delays

A first portion of incoming light and a second portion of incoming light travel in opposite directions within a first optical waveguide. A ring resonator in-couples the first portion of incoming light and the second portion of incoming light from the first optical waveguide, such that the first portion of incoming light and the second portion of incoming light travel in opposite directions within the ring resonator. A second optical waveguide is disposed to in-couple the first portion of incoming light and the second portion of incoming light couple from the ring resonator, such that the first portion of incoming light and the second portion of incoming light travel in opposite directions within the second optical waveguide away from the ring resonator. One or more photodetector(s) are optically connected to receive the first portion of incoming light and the second portion of incoming light from the second optical waveguide.
Owner:AYAR LABS INC

A frequency superposition-based online error calibration method for a hemispherical resonator gyro head

The application discloses an online error calibration method for a hemispherical resonator gyro based on frequency superposition, which solves the problem that the traditional error calibration method for a hemispherical resonator gyro cannot realize online calibration of gain error, bias angle error and phase error in the same working mode. The application utilizes high-frequency cosine and sine reference signals to demodulate two-channel detection signals and extract high-frequency components in the detection signals. Subsequently, an associated model is established by using the high-frequency cosine and sine given control signals and the demodulated signals to realize online identification of the gyro error, and the identification result is applied to online calibration of the channel gain error, bias angle error and phase error, thereby enhancing the anti-interference ability of the hemispherical resonator gyro under variable temperature conditions. The application is mainly used for simultaneous online calibration of the channel gain error, bias angle error and phase error.
Owner:HARBIN INST OF TECH

Saturated porous medium metasurface Portrait wave frequency dispersion relation calculation method and system

The invention relates to the technical field of physical acoustics, in particular to a saturated porous medium metasurface Portrait wave frequency dispersion relation calculation method and system, and the method comprises the following steps: obtaining expressions of solid skeleton displacement, fluid relative displacement, total stress, solid shear stress and pore pressure under the action of Portrait waves; obtaining an expression of a fluid displacement component and a fluid normal stress; obtaining an expression about the relative motion of the resonator; according to all the expressions, stress and displacement continuity boundary conditions are applied to the interface of the saturated porous medium and the fluid layer, a characteristic equation of frequency dispersion characteristics is obtained and solved, and a frequency dispersion curve is obtained. According to the method, the explicit frequency dispersion relation of the saturated porous medium metasurface portrait waves is provided, the calculation efficiency and prediction precision of complex interface wave propagation are improved, the optimal design of the metasurface resonator array can be guided, and a key theoretical tool and technical support are provided for design of high-performance acoustic functional devices and structures.
Owner:EAST CHINA JIAOTONG UNIVERSITY

Resonator and surface acoustic wave filter

The invention relates to the technical field of filters, and discloses a resonator and a surface acoustic wave filter, and the resonator comprises an interdigital transducer and a transverse strip structure. The interdigital transducer comprises a first bus bar, a second bus bar, a plurality of first finger bars and a plurality of second finger bars; the first bus bar and the second bus bar are oppositely arranged, the same ends of the plurality of first finger bars are connected with one side, close to the second bus bar, of the first bus bar, and the same ends of the plurality of second finger bars are connected with one side, close to the first bus bar, of the second bus bar; the transverse strip structure is arranged in a target area of the interdigital transducer; the transverse strip structure comprises a plurality of first transverse strips and a plurality of second transverse strips, the first transverse strips and the second transverse strips are arranged in a crossed mode, the adjacent first transverse strips and second transverse strips are distributed in a staggered mode, and the first ends, in the first direction, of the first transverse strips are connected with the third ends, in the first direction, of the second transverse strips. According to the resonator provided by the invention, the Q value of the resonator can be improved while a transverse mode is effectively suppressed.
Owner:MAXSCEND MICROELECTRONICS CO LTD

Joint compensation method for delay and damping asymmetric error of all-angle hemispherical gyroscope

The invention relates to an all-angle hemispherical gyroscope delay and damping asymmetric error joint compensation method, which belongs to the technical field of inertial navigation, and comprises the following steps: S1, obtaining a self-precession excitation signal and an angular velocity measurement value signal output by a gyroscope; s2, preliminarily estimating the time delay of the gyroscope by adopting a maximum likelihood weighted cross-correlation time delay estimation method; s3, estimating the damping asymmetry error of the gyroscope through a recursive least square method by utilizing the estimated time delay; s4, re-estimating the time delay of the gyroscope by using the estimated damping asymmetric error to obtain the updated estimated time delay; judging whether the updated estimated delay is converged or not; if not, returning to the step S3, and re-estimating the damping asymmetric error of the gyroscope through the recursive least square method by utilizing the updated estimated delay; if the time delay is converged, the finally estimated time delay is obtained; and S5, compensating the finally estimated delay and damping asymmetric error into a control system of the gyroscope. According to the invention, the measurement precision and long-term stability of the gyroscope are improved.
Owner:ZHEJIANG UNIV

Magnetless cryogenic circulator

A magnetless cryogenic circulator is developed that has three identical resonators in three branches. Each branch connects two ports and each resonator has a capacitor connected across a tunable inductor. A set of tunable inductors modulated with modulation signals that have a relative phase of 0°, 120° and 240° provided through a circuit. A microstrip delay line for providing the modulation signal to the three resonators, wherein the resonators are modulated in time such that the degeneracy of the two inherent counter-rotating modes is lifted, achieving a non-reciprocal signal routing. All capacitors and inductors are monolithically integrated and fabricated using a multi-layer Nb-based process with Nb / AlOx / Nb JJs.
Owner:KHAIRA NAVJOT KAUR +3

Three-axis accelerometer based on four-degree-of-freedom weak coupling resonator

The invention provides a triaxial accelerometer based on a four-degree-of-freedom weak coupling resonator, the triaxial accelerometer comprises an upper-layer structure and a lower-layer structure, the upper layer is a micromechanical sensitive element constructed by taking silicon as a material, the lower layer is a glass base processed by a silicon dioxide material, and the glass base is used for providing mechanical support and electrical isolation functions. Wherein the micromechanical sensitive element has a signal conversion function; and the lower-layer glass base is formed by wet etching and metal sputtering processes and is used for signal output. On the basis of collaborative design of the orthogonally distributed resonance unit array and the mechanical amplification mechanism, electrostatic driving and amplitude ratio detection are combined, synchronous and accurate sensing of acceleration of the Y axis, the X axis and the Z axis is achieved through a single sensitive element, the technical limitation of a traditional single-axis detection mode is broken through, the complexity of a rear-end signal processing circuit is reduced, and the detection precision is improved. The device space utilization rate is improved.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Dielectric filter with built-in negative coupling structure and manufacturing method thereof

The dielectric filter with the built-in negative coupling structure comprises a dielectric block, a conductive layer and the negative coupling structure, at least two resonance holes are formed in the dielectric block, the conductive layer is laid on the surface of the dielectric block and the inner walls of the resonance holes, and the negative coupling structure is arranged between two adjacent resonators divided by the two resonance holes. The negative coupling structure comprises the two conducting strips which are arranged in parallel at an interval and the metalized via hole for connecting the two conducting strips, and the conducting strips and the metalized via hole are embedded in the dielectric block and are not connected with the resonance hole and the conducting layer, so that coupling can be realized in the dielectric block, exposure is not needed, and the strength is not reduced; according to the manufacturing method of the dielectric filter, the defects of deformation, local collapse and the like generated during firing can be avoided, the size of the dielectric filter can be greatly reduced, the requirement for miniaturization is met, the conducting strips and the metalized via holes are arranged in a prefabrication machining mode, the machining precision is high, the zero point position control is accurate, implementation is easy, and the yield is high.
Owner:JIANGSU CAI QIN TECH CO LTD

Vibration phase bit coding test method and device based on graphene parameter resonator

The invention discloses a vibration phase bit coding test method and device based on a graphene parameter resonator, and relates to the technical field of resonators. The method comprises the following steps: applying an initial bias voltage and a parameter excitation signal, and setting the driving frequency of the parameter excitation signal to be twice of the resonant frequency corresponding to the initial bias voltage; continuously increasing the parameter excitation signal until the resonator enters a parameter vibration state; applying a direct driving signal, and setting the driving frequency of the direct driving signal as the resonant frequency corresponding to the initial bias voltage; selecting bias voltage values on two sides of the initial bias voltage, and scanning from low to high and from high to low to obtain vibration phase change; and obtaining the vibration phase bit code of the to-be-measured graphene parameter resonator according to the vibration phase change. Information is stored through mechanical vibration of the graphene parameter resonator instead of utilizing charge or electron spinning, electromagnetic interference and phase noise are effectively avoided, and the graphene parameter resonator is more stable at high temperature and suitable for a high electromagnetic noise environment.
Owner:SUZHOU UNIV

Exceptional-point-enhanced remote phase sensing

Systems and methods for enhancing sensitivity in a sensor with exceptional points (EPs), including: providing a sensor in the form of an exception-point (EP)-enhanced sensor; providing one or optical fibers associated with the EP-enhanced sensor; providing a scatterer; and / or providing a reflective component, the reflective component influencing a mode coupling of the EP-enhanced sensor. Where the sensor is a microresonator: coupling one or more modes of the microresonator via a bidirectional coupling channel and a unidirectional coupling channel; manipulating the mode coupling by a scatterer and a reflective component, the reflective component influencing the mode coupling of the resonator; steering, via the reflective component, the microresonator around EPs; and / or sending, via the reflective component, one or more phase changes in response to external perturbations back to the microresonator.
Owner:WASHINGTON UNIV IN SAINT LOUIS

Laser resonant cavity thermal drift suppression method and system and laser

The invention discloses a laser resonant cavity thermal drift suppression method and system and a laser, relates to a thermal lens effect and cavity length drift adaptive compensation technology of a high-power laser system, and aims to solve the problems of low cavity length adjustment sensitivity and slow response speed in the prior art. The method comprises the following steps: monitoring the central wavelength of a Raman Stokes spectral line in a laser resonant cavity in real time by adopting a spectral analysis module and obtaining the drift distance of the Raman Stokes spectral line; the FPGA controller determines the cavity length compensation amount of the laser resonant cavity according to the drift distance; and the FPGA controller controls the piezoelectric actuator according to the cavity length compensation amount to adjust the cavity length of the laser resonant cavity in real time so as to suppress thermally induced wavelength drift. The laser comprises a pumping source, a laser resonant cavity, a crystal arranged in the laser resonant cavity and a laser resonant cavity thermal drift suppression system, pumping light generated by the pumping source enters the laser resonant cavity, and Stokes light output by the laser resonant cavity enters the laser resonant cavity thermal drift suppression system.
Owner:HEBEI UNIV OF TECH

Metallization method for trimming after assembly of micro-hemispherical harmonic oscillator

The invention relates to the technical field of manufacturing of micro electro mechanical systems, in particular to a metallization method of a micro-hemispherical harmonic oscillator for trimming after assembly, which comprises the following steps of: establishing a micro-hemispherical harmonic oscillator structure model, simulating and calculating modal parameters of the harmonic oscillator; calculating an influence rule of the trimming width and the trimming depth on frequency splitting of the micro-hemispherical harmonic oscillator model by adopting finite element software to obtain a relation curve of trimming quality and frequency splitting change; measuring the resonant frequency f and the frequency cracking f of the working mode of the harmonic oscillator to be processed, estimating the removal mass required by the corresponding frequency cracking according to the calculated relation curve, carrying out mass trimming to obtain a relation curve of the actual removal mass and the frequency cracking, and confirming the minimum width wmin required by the actual trimming; and removing the film layer with the ring width of wmin by adopting laser. According to the invention, quality trimming is carried out on the premise of not influencing the capacitance value of the harmonic oscillator, and driving and detection gain errors caused by quality trimming are reduced.
Owner:CHINA ELECTRONICS TECH GRP NO 26 RES INST

Circuit and method of providing common mode suppression for amplifier

A semiconductor device has an amplifier and common mode suppression (CMS) circuit formed on a common substrate. The CMS circuit has a first input and second input coupled for receiving an input signal and further has a first output coupled to a first input of the amplifier and a second output coupled to a second input of the amplifier to reduce common mode. The CMS circuit further has a ground plane, a first conductive trace disposed over the ground plane and coupled between the first input and first output, second conductive trace disposed over the ground plane and coupled between the second input and second output, and third conductive trace disposed over the ground plane with a first end of the third conductive trace coupled to the ground plane and a second end of the third conductive trace open circuit to form a resonator.
Owner:MACOM TECH SOLUTIONS HLDG INC

Hemispherical harmonic oscillator inner surface machining path correction method and hemispherical harmonic oscillator inner surface machining method and device

The invention discloses a hemispherical harmonic oscillator inner surface processing path correction method, a hemispherical harmonic oscillator inner surface processing method and a hemispherical harmonic oscillator inner surface processing device. The correction method comprises the following steps: processing the inner surface of a hemispherical harmonic oscillator test article based on a set processing path; measuring the radius of the inner sphere of the processed test article, calculating the deviation of the radius of the inner sphere based on the measured value and the design size, obtaining the compensation amount of the Z-axis direction of the processing route based on the deviation, and performing reverse compensation on the Z-axis coordinate of the terminal point of the processing route to obtain a first corrected processing route; reprocessing the hemispherical resonator test article based on the first correction processing route; and measuring the diameter of an inner support column of the test article, calculating translation deviation based on a measured value and a design size, taking the translation deviation as the compensation amount of the X-axis direction of the machining route, and performing reverse compensation on the X-axis coordinates of all points of the first correction machining route to obtain a second correction machining route. The machining method can ensure that the size and the geometrical shape of the machined hemispherical harmonic oscillator are within the design tolerance range.
Owner:HUNAN 208 ADVANCED TECH CO LTD

MEMS resonator low ripple error temperature measurement system based on voltage feedback compensation

The invention discloses an MEMS resonator low ripple error temperature measurement system based on voltage feedback compensation, and the system comprises a trans-impedance amplifier, an analog-to-digital converter, a frequency detection module, a PI controller, a variable gain amplifier, a Schmitt trigger, a first digital-to-analog converter, a biasing circuit, mode switches S1 and S2, and a voltage feedback compensation loop. The compensation loop comprises an amplitude detection module, a lookup table, a second digital-to-analog converter and an adder; the amplitude detection module receives the digital signal from the analog-to-digital converter and outputs a vibration amplitude signal in real time; the lookup table receives the vibration amplitude signal, inquires and outputs a corresponding digital compensation voltage, and converts the digital compensation voltage into an analog voltage through a second digital-to-analog converter; the adder adds the analog voltage and a fixed bias voltage to generate a dynamic bias voltage and applies the dynamic bias voltage to a drive electrode of the MEMS resonator. According to the system, an amplitude-driving end bias voltage feedback compensation loop is introduced, so that the periodic ripples of the resonant frequency are effectively suppressed.
Owner:SHANGHAI JIAOTONG UNIV

Mems resonator and mems resonator array

The application provides a MEMS resonator and a MEMS resonator array. The MEMS resonator comprises a vibration unit, a coupling energy storage unit, an anchor point and a first electrode. The vibration unit is used for generating resonance. The coupling energy storage unit is coupled with the vibration unit and is a high-Q vibration mode. The anchor point fixes the coupling energy storage unit on a substrate. The first electrode is arranged adjacent to the vibration unit and has a gap between the vibration unit. The application sets the coupling energy storage unit in the MEMS resonator. On the one hand, the coupling energy storage unit is equivalent to introducing other high-Q bulk mode vibration structures on the basis of the existing vibration unit, so as to improve the resonance Q value of the whole MEMS resonator. On the other hand, the coupling energy storage unit is coupled with the vibration unit, the coupling area is increased, the coupling efficiency is improved, and the resonance Q value is further improved. In addition, the coupling area of the coupling energy storage unit and the vibration unit can be increased, which is also beneficial to improve the coupling efficiency.
Owner:MST MICROELECTRONICS (SHENZHEN) CO LTD

Acoustic resonator device and filter component

The present invention provides an acoustic resonator device (1) having a resonator (R) comprising: a first electrode (2), a second electrode (3) arranged at a distance from the first electrode (2) in a first direction (z), wherein the first electrode (2) and the second electrode (3) extend along planes (E) arranged perpendicular to the first direction (z); and a layer stack (S) arranged between the first electrode (2) and the second electrode (3), which layer stack comprises a first piezoelectric layer (4) and a second piezoelectric layer (5), wherein the first piezoelectric layer (4) and a second piezoelectric layer (5) comprise a piezoelectric material, and an acoustic high-impedance layer (6) arranged between the first piezoelectric layer and the second piezoelectric layer;wherein an acoustic thickness (DR) of the resonator in the first direction (z) is n times half an acoustic wave (W) of a predetermined frequency, where n is a natural number greater than one. The invention also provides a corresponding filter component (10).
Owner:ROBERT BOSCH GMBH

Micro-ring resonator and wavelength division multiplexing network system

The invention provides a micro-ring resonator and a wavelength division multiplexing network system, and relates to the technical field of photoelectricity. A microring resonator includes: an input port to receive an input optical signal; the two heat adjusting couplers are located on the two sides of the micro-ring waveguide respectively and used for adjusting the coupling ratio of the micro-ring waveguide; the two multi-mode interference devices are respectively connected with the heat adjusting coupler and are used for carrying out heat-light adjustment based on the heat adjusting electrode; the two thermal adjusting electrodes are respectively connected with the multi-mode interference device and are used for adjusting interference parameters of the multi-mode interference device; the voltages of the two thermal adjusting electrodes are the same or different; the micro-ring waveguide is located between the two thermally tunable couplers and is used for performing resonance enhancement on the optical signal of the target wavelength; and the two straight waveguides are respectively connected with the two thermal modulation couplers and the two multi-mode interference devices and are used for transmitting optical signals. Therefore, insertion loss and crosstalk are effectively reduced, and wavelength drift caused by temperature change is compensated at the same time.
Owner:INSPUR (SHANDONG) COMPUTER TECH CO LTD