900 results about "Operating frequency" patented technology

The invention provides a multi-frequency adaptive unmanned aerial vehicle spectrum detection method and system, and the method comprises the steps: extracting the spatial and temporal distribution characteristics of carbon particle concentration and temperature gradient intensity based on a real-time environment data set, determining the attenuation coefficient distribution of different frequency band signals in a current environment, and obtaining a frequency band sensitivity analysis result; on the basis of a frequency band sensitivity analysis result, identifying a frequency band range which is most seriously influenced, and generating a signal data set which is optimized according to frequency bands; according to the signal data set optimized in different frequency bands, in combination with turbulence energy spectrum distribution and refractive index disturbance intensity, determining a random interference mode of a fire scene turbulence field on unmanned aerial vehicle detection signals and frequency dependence of the random interference mode; and adjusting the working frequency range of the spectrum detection equipment according to the frequency self-adaptive correction propagation path data set, and generating a multi-band collaborative optimization detection parameter set.

The invention relates to a wireless power transmission system parameter identification method based on a time domain differential model, and belongs to the technical field of wireless power transmission system control. The method comprises the following steps: establishing a parameterized time domain dynamic physical model; collecting system dynamic response data; constructing an optimization target based on a time domain residual error; and performing optimal parameter estimation based on iterative optimization. According to the method, a time domain dynamic physical model of a wireless power transmission system is constructed, and unknown parameters are solved through an iterative optimization algorithm with a minimum waveform matching error as a target. According to the algorithm, in an iteration process, a physical model is called to carry out forward differential equation solution, a time domain residual error between a model solution current and a real measurement current is used to drive a parameter estimation value to converge, and finally high-precision and high-robustness wireless power transmission system parameter identification under any working frequency is realized. The problem that in the prior art, due to static stiffness and sensitivity to waveform distortion of a theoretical model, the identification precision is insufficient is effectively solved.

A calibration method comprises adjusting an operating frequency of an air-pulse generating device, such that a sound pressure level (SPL) of the air-pulse generating device is within a specific range. The sound producing module comprises the air-pulse generating device configured to produce sound via generating a plurality of air pulses at a pulse rate corresponding to the operating frequency.

An acoustic matching structure is used to increase the power radiated from a transducing element with a higher impedance into a surrounding acoustic medium with a lower acoustic impedance. The acoustic matching structure consists of a thin, substantially planar cavity bounded by a two end walls and a side wall. The end walls of the cavity are formed by a blocking plate wall and a transducing element wall separated by a short distance (less than one quarter of the wavelength of acoustic waves in the surrounding medium at the operating frequency). The end walls and side wall bound a cavity with diameter approximately equal to half of the wavelength of acoustic waves in the surrounding medium. In operation, a transducing element generates acoustic oscillations in the fluid in the cavity. The transducing element may be an actuator which generates motion of an end wall in a direction perpendicular to the plane of the cavity to excite acoustic oscillations in the fluid in the cavity, and the cavity geometry and resonant amplification increase the amplitude of the resulting pressure oscillation. The cavity side wall or end walls contain at least one aperture positioned away from the center of the cavity to allow pressure waves to propagate into the surrounding acoustic medium.

The invention relates to the technical field of array antennas, and discloses a common-caliber layout-based ultra-wideband array antenna, which comprises a low-frequency unit and a high-frequency unit which are arranged based on a common caliber, and is characterized in that the working frequency of the low-frequency unit covers an fmin-f0 frequency band, and the working frequency of the high-frequency unit covers an f0-fmax frequency band. The low-frequency unit is a broadband dual-polarized antenna, a uniform tight coupling array distributed at equal intervals is formed by adopting a tight coupling principle, and the unit interval is calculated based on a grating lobe suppression condition at the frequency f0. The high-frequency unit is a miniaturized broadband dual-polarized antenna and adopts a sparse array form; the initial unit spacing and the unit number of the sparse array are calculated based on the grating lobe suppression condition at the highest frequency f2 of the f1-f2 frequency band with the side lobe requirement between the f0-fmax frequency bands. The ultra-wideband array antenna gives consideration to full-band array performance, can provide sufficient space for active circuit arrangement, and effectively reduces power consumption and cost.

The invention relates to the technical field of serial communication, in particular to a high-speed clock recovery method and device based on an adjustable delay chain, and the method comprises the steps: generating a recovery clock initial phase; a multi-stage programmable delay chain is adopted, and a phase-locked loop or delay-locked loop structure is combined, so that the initial phase of a recovered clock is finely adjusted and locked, and phase capture and clock edge alignment are performed; based on a multi-path recovery structure, a path with the minimum error is selected from the delay paths through a preset phase error detection mechanism to serve as an output channel; environment parameters of the environment are collected, parameters of the multi-stage programmable delay chain are dynamically adjusted, and high-speed clock recovery is completed. According to the method, the edge capture precision, the system jitter tolerance and the working frequency range of the recovered clock are remarkably improved, and then the phase consistency, the anti-interference capability and the overall data receiving reliability of the recovered clock in the high-speed communication system are effectively improved.

The invention provides a frequency modulation method and device, electronic equipment and a medium, and relates to the technical field of computers. Comprising the steps of receiving at least one pre-frequency-modulation instruction and at least one piece of task information; executing initial frequency adjustment based on the at least one pre-frequency-modulation instruction so as to adjust the initial working frequency to the target working frequency; and in a task execution process corresponding to the at least one piece of task information, performing frequency adjustment on the target working frequency based on the load information and / or the performance information. According to the method provided by the invention, the working frequency is adjusted in advance before the task is executed based on the pre-frequency-modulation instruction, the lag error of dynamic frequency modulation is reduced through coarse-grained frequency adjustment, and performance jitter during load sudden change is avoided; and by combining a frequency modulation strategy of load and / or performance, fine-grained frequency adjustment can be further realized, and good balance between energy efficiency and stability can be obtained while effective frequency modulation is ensured.

The invention relates to the technical field of sensors, in particular to a passive wireless temperature sensing method for a high-temperature strong electromagnetic interference environment. Comprising the following steps that a temperature signal is collected through a sensing circuit, and the sensing circuit comprises an inductor and a capacitor; obtaining a resonance signal by utilizing magnetic coupling of a reading circuit and the sensing circuit; processing the resonance signal to obtain a temperature measurement value; the resonant frequency is dynamically corrected by considering the coupling effect of the temperature, the coil line width thermal expansion, the parasitic capacitance temperature coefficient and the working frequency; the mutual inductance coefficient is compensated by considering the cooperative influence of the magnetic conductivity, the loss angle tangent and the coupling distance; errors caused by electromagnetic interference are corrected through beat frequency characteristics of the electromagnetic interference frequency and the resonant frequency, and the multi-physical-field coupling influence under the high-temperature and strong-electromagnetic-interference environment can be dealt with.

The invention provides a probe frequency response calibration parameter determining method, a probe frequency response calibration parameter measuring system and a storage medium, and the probe frequency response calibration parameter determining method introduces a composite test signal including a steady-state frequency sweep signal and a transient pulse signal. De-embedding calculation is carried out on a data set which is obtained under the two conditions that a probe is not connected to a calibration system and the probe is connected to the calibration system and responds to the same test signal, namely amplitude division is carried out to eliminate link gain deviation, phase subtraction is carried out to strip channel phase deviation, accurate extraction of the independent frequency response characteristic of the probe is achieved, and the accuracy of the independent frequency response characteristic of the probe is improved. Therefore, the frequency response calibration parameter of the probe is determined. According to the invention, system errors introduced by a test environment and a rear-end measurement link are eliminated, the calibration precision of the amplitude-frequency characteristic and the phase-frequency characteristic of the probe in a full working frequency band is improved, and a reliable basis is provided for implementation of accurate real-time anti-distortion compensation in actual signal acquisition of measurement equipment such as an oscilloscope and the like; and the reduction authenticity of the whole measurement system in the high-frequency and broadband signal test is ensured.

The present application relates to a kind of radiation elements, the radiation element includes: radiator, feed rod and parasitic element, the radiator is fed by the feed rod, wherein, the parasitic element includes conductive structure, the conductive structure includes serpentine conductive path, and coupling capacitance is formed between conductive structure and radiator, and wherein, the center frequency of the operating frequency band of the radiator is greater than the center frequency of the first operating frequency band of parasitic element.Radiation element according to some embodiments of the present application can at least reduce the coupling interference between each array, improve isolation performance.In addition, the radiation element according to some embodiments of the present application can also be used to reduce the size of radiation element itself, so that radiation element is more compact.In addition, the present application also relates to a kind of base station antennas.

The invention discloses a self-adaptive configuration method for an optimal working point of a concrete hidden crack ultrasonic thermal excitation system, and the method comprises the steps: collecting multi-physical field response data of the system under different parameter combinations through constructing a parameter space containing initial coupling pressure and working frequency; constructing an excitation efficiency evaluation index based on the active power response or thermal image temperature difference of the transducer, and locking an initial optimal working point by identifying extreme value features of an index response function; performing second-order sensitivity analysis on the optimal point neighborhood by using a Hessian matrix, and constructing a tolerance elliptic model to quantify a parameter control boundary; and meanwhile, frequency and pressure drift are monitored in real time based on a power-phase decoupling mechanism of voltage and current. According to the method, the optimal working parameters can be adaptively matched for loading devices with different rigidities, the engineering tolerance is scientifically set, and the energy conversion efficiency and the detection robustness of the ultrasonic thermal excitation system are improved.

The low-frequency electromagnetic wave has the characteristics of high penetrability and low signal attenuation, and can be widely applied to the fields of underground communication, underwater communication and the like. Most existing low-frequency transmitting antennas are electrically small antennas, have the problems of large size, complex equipment, short transmission distance and the like, and are difficult to meet actual requirements. The invention relates to a high-power pulse low-frequency antenna based on a Tesla coil. The high-power pulse low-frequency antenna is a high-power pulse transmitting antenna composed of a solid-state double-resonance Tesla circuit, a transformer, a primary coil and a secondary coil. The antenna adopts a high-voltage pulse generated by a Tesla circuit for feeding, and meanwhile, a transformer type impedance matching network is combined, so that the feed power is maximized. The radiation coil selects a primary and secondary nested coupling structure, the working frequency is accurately adjusted to be the output frequency of the Tesla circuit by respectively connecting resonant capacitors in series to the primary and secondary coils, and effective amplification of radiation signals is realized based on a magnetic coupling effect. The size of the coil is in the sub-cubic meter level and is within one thousandth of the working wavelength. Aiming at the antenna design difficulty in long-wave communication, the antenna has the advantages of high input power, long-distance transmission and small physical size, and has potential application value in the fields of cross-medium communication, emergency management communication and the like.

Power-combining devices and more particularly spatial power-combining and related structural arrangements are disclosed. Such structural arrangements involve mechanical connections between center waveguide sections and input and / or output coaxial waveguide sections that provide scalable structures for different operating frequency bands, improved mechanical connections, and / or improved assembly. Exemplary structural arrangements include structures that extend through center waveguide sections and into input and / or output coaxial waveguide sections, integrated mechanical structures within the center waveguide section, compression fit arrangements, dielectric inserts arranged within channels of coaxial waveguide sections, and / or various combinations thereof.

Embodiments of this application are applied to the communication field, and provide a communication method and an electronic device. In a scenario in which operating frequency bands of Wi-Fi communication and Bluetooth communication overlap, an electronic device may obtain a first communication indicator threshold after determining that the electronic device meets a first preset condition, and then compare a latest communication indicator obtained in real time with the first communication indicator threshold, to determine whether the latest communication indicator meets a second preset condition. When the latest communication indicator meets the second preset condition, the electronic device may perform Wi-Fi communication through a first antenna and perform Bluetooth communication through a second antenna. In this way, interference between the Wi-Fi communication and the Bluetooth communication can be reduced, and good transmission performance can be maintained. This not only improves system flexibility, but also improves communication quality of the electronic device.

The invention is suitable for the technical field of electric energy transmission, and provides an SWPT system frequency adaptive regulation and control method and system based on environmental perception, and the method comprises the steps: obtaining the output current data of high-frequency electric energy, and obtaining the first current data; determining an initial frequency disturbance step length in combination with the collected environmental parameters; applying disturbance to the output frequency according to the initial frequency disturbance step length, and collecting output current data after disturbance to obtain second current data; the change trend of the two current data is analyzed, and the deviation direction of the current working frequency and the system resonant frequency is judged; adjusting the output frequency according to a frequency control instruction generated in the deviation direction, and enabling the current working frequency to approach the resonant frequency; current data is continuously updated, and in combination with environment parameters collected in real time, the working frequency tracks resonant frequency drift caused by environment change through iteration; and the environmental adaptability, the energy transmission efficiency and the overall reliability of the single-line electric energy transmission system are effectively improved.

The invention discloses an active regulation and control type piezoelectric acoustic coding metasurface and a use method thereof in the acoustic field, the acoustic coding metasurface comprises a plurality of active regulation and control type piezoelectric acoustic coding units, and each active regulation and control type piezoelectric acoustic coding unit comprises a shell, a piezoelectric composite sheet and an external circuit; the two ends of the shell are open, and piezoelectric compacts are embedded in the shell. The piezoelectric compacts divide the interior of the shell into two symmetrical Helmholtz resonators. The piezoelectric composite sheet is connected with an external circuit of the shell; the external circuit switches open and short circuit states, so that the transmission phase difference of sound waves with working frequency is pi after passing through the active regulation and control type piezoelectric acoustic coding unit, and the sound waves are respectively used as a coding type 0 and a coding type 1. According to the invention, the problems of insufficient reconfigurable capability and slow switching response speed of the existing acoustic coding metasurface are solved.

Certain aspects of the present disclosure provide techniques for ensuring compatibility between network slice operating frequencies and user equipment (UE) radio capabilities. An example method generally includes receiving, from a network core entity, a request for information about capabilities of a user equipment (UE) and information about a plurality of network slices in an allowed set of network slices for the UE; identifying, based on UE capability information, a subset of the allowed set of network slices that the UE can use for communications between the UE and the network entity; generating a response including at least the subset of the allowed set of network slices that the UE can use for communications between the UE and the network entity; and transmitting the response to the network core entity.

The invention discloses a reference frequency calibration and foreign matter detection method for a wireless charging system. The method comprises the following steps: firstly, acquiring coil initialization resonant frequency and recording a reference input current value in a no-load state of a transmitting end; then dynamically adjusting the reference resonant frequency through a pre-established compensation model based on the environment temperature and the input voltage; detecting the offset between the adjusted reference frequency and the actual resonant frequency and the input current offset in real time, and comparing the offset with a preset threshold value to judge the metal foreign matter; and for the condition that the frequency deviation is in the preset verification interval, the transmitting end and the receiving end complete communication protocol handshake and then are switched to the resonant working frequency, and charging is started, so that accurate calibration of the idle standby frequency and efficient identification of the foreign matter are realized.

A method for parameter calculation of a resonant converter includes steps of: (A) setting a predetermined operating condition of the resonant converter, and the predetermined operating condition includes a specific frequency range of an operating frequency of the resonant converter, (B) calculating a plurality of first resonance parameters in the specific frequency range, (C) acquiring a first resonance parameter in which a current ripple of a resonant inductor of the resonant converter is a minimum value in the plurality of first resonance parameters, (D) calculating a plurality of second resonance parameters according to the turns ratio of the first resonance parameter and the predetermined operating condition, and selecting one of the second resonance parameters as the resonance parameter.

The invention discloses an ultra-wideband multi-system combining platform containing an NR4.9 G frequency band. The combining platform comprises a front-stage combining module, a higher harmonic suppression filtering module and a final-stage combining module, wherein the pre-stage combining module is a common multi-system combining platform and covers 2G, 3G and 4G system signals of mobile communication, and the frequency band is 698-2400HMz; the higher harmonic suppression filtering module is used for frequency selection of the working frequency band of 698-2400MHz of the preceding-stage combining system and suppression of higher harmonics and clutters within the frequency band bandwidth of 2500-5000MHz; the final-stage combining module adopts a hierarchical combining design, NR2.6 G, NR3.5 G and a higher harmonic suppression filtering unit are used as a first stage, NR4.9 G is used as a second stage, the working frequency of the final-stage combining module covers 2515-2515-4960 MHz, and the final-stage combining module comprises a mobile NR4.9 G system. The system has the advantages that existing 2G, 3G, 4G and 5G system frequency bands and an NR4.9G system are integrated and applied to wireless public network coverage, and co-construction and sharing of existing resources within the working frequency band of 698-4960 MHz are achieved.

Disclosed herein is a system and method for optimizing RF power delivery to a plasma process chamber. This invention utilizes a data-driven approach to determine resonant frequencies for various plasma states, eliminating the need for conventional PID controls. By collecting performance data from an RF power generator as a function of operating frequency during the process recipe execution and analyzing portions of the waveform, the system continuously identifies resonating frequencies for each plasma state. Consequently, the RF power generator adapts in real-time to deliver optimal stability and performance.

The embodiment of the invention provides a parameter space degree of freedom determination method and device, electronic equipment and a storage medium, and the scheme is as follows: according to a first working frequency and a second working frequency corresponding to a first quantum bit and a second quantum bit under the condition that the frequency detuning is 0, and a third working frequency of an adjustable coupler under a preset gate length, determining the degree of freedom of a parameter space; calculating target coupling strength; according to periodic quantum logic gate operations on the first quantum bit and the second quantum bit under different frequency detuning conditions, obtaining a first corresponding relation between frequency detuning and a leakage rate, and obtaining a second corresponding relation between frequency detuning and a preset condition phase; and based on the first corresponding relation and the second corresponding relation, obtaining first detuning and second detuning corresponding to the lowest leakage rate under the target phase as target detuning parameters. According to the technical scheme provided by the embodiment of the invention, the influence of the distortion of the residual short time scale on the magnetic flux control line on the quantum calculation process can be avoided, so that the fidelity of quantum calculation is improved.

The invention relates to a special-shaped magnetic core loss test method. The method comprises the following steps: determining an equivalent standard magnetic core based on the shape of a special-shaped magnetic core; calculating the effective sectional area, the effective magnetic path length and the effective volume of the special-shaped magnetic core based on the equivalent standard magnetic core; calculating a test working voltage required by the magnetic core loss test based on a test working frequency, a test working magnetic flux density, the effective sectional area and the number of effective coils; and performing the magnetic core loss test based on the number of the effective coils, the test working frequency, the test working voltage, the effective sectional area, the effective magnetic path length and the effective volume. Therefore, the loss test of the special-shaped magnetic core can be realized.

The application discloses a quantum bit regulation circuit, a quantum chip and a quantum computer, and relates to the field of quantum chip control. Based on different frequency ranges, an external signal generator can output an electric signal including low-frequency control information and / or high-frequency control information to a control matching part through a first integrated control line by using only one control channel; the control matching part couples the electric signal including high-frequency control information with a cross capacitor to make the equivalent coupling capacitance value of the quantum bit equal to a target coupling capacitance value, and / or couples the electric signal including low-frequency control information with a superconducting quantum interference device to form a magnetic field to make the working frequency of the quantum bit equal to a target working frequency. In the case of only one control channel, the control matching part realizes the driving and frequency regulation of the quantum bit, reduces the control channel, provides convenience for the setting of a measurement and control channel, is beneficial to the wiring design and packaging of the quantum chip, and is beneficial to integrated design.

The present disclosure relates to an antenna apparatus, and more particularly, to an antenna apparatus including a plurality of low-band elements that radiate an operating frequency in a first frequency band, and a plurality of mid-band elements that radiate an operating frequency higher than the operating frequency in the first frequency band. Among the plurality of mid-band elements, mid-band elements that interfere in a radiation direction in relation to the low-band elements are disposed to penetrate centers of the low-band elements, thereby providing an advantage of securing favorable antenna gain.

An automatic gain adjustor for a hybrid oscillator can be employed to overcome the frequency limitations of hybrid phase lock loops (PLLs). For example, an automatic gain adjustor for a hybrid oscillator can include a hybrid oscillator that is configured to receive a coarse tuning signal and a gain adjustment signal and generate an output signal with any frequency within the specified frequency range of the hybrid PLL. The automatic gain adjustor for a hybrid PLL may further include a fine tuning array that receives one or more fine tuning selection signals and generates a gain adjustment signal that is received by the hybrid oscillator. The fine tuning array generates a gain adjustment signal to adjust the gain of the hybrid oscillator according to an operating frequency range of the hybrid oscillator.

The application discloses a kind of synchronization methods of multi-channel high-speed digital-analog conversion module, comprising: reference clock source generates reference clock;Trigger controller generates trigger signal, trigger signal is used to inform each DAC board to start the digital quantity transmission of new waveform;Master chip PLL is multiplied to preset operating frequency by reference clock, and the feedback path of master chip PLL is removed to DAC board, and the delay of voltage-controlled oscillator output master chip IO's wiring is consistent and position is close;DAC PLL is multiplied to the sampling clock frequency of DAC by reference clock, and the output phase of DAC PLL can be adjusted, to ensure the timing margin when DAC reads digital quantity;Master chip is triggered under trigger signal, and at preset time, the digital quantity of several waveforms to be converted is sent to DAC by isochronous transmission path, and DAC converts digital quantity into analog waveform, realizes that all DAC completes digital quantity to analog quantity conversion at the same time, and realizes the high-precision synchronous conversion of DAC.

The invention discloses a radio frequency circuit and a control method thereof, a radio frequency heating device, equipment and a medium, and the control method comprises the steps: controlling the radio frequency circuit to work in a first state, and the first state comprises that the working frequency point of a signal generation device is a preset frequency point, and the output power of a power amplifier is preset power; the preset power is smaller than rated output power of the power amplifier; controlling the signal generation device to traverse frequency points in a predetermined frequency band, and detecting the reflection power of the power amplifier in real time to obtain a target frequency point corresponding to the minimum reflection power; and controlling the signal generating device to work at the target frequency point, and adjusting the attenuation value of the automatic level control device, so that the output power of the power amplifier is the rated output power, and the attenuation value corresponding to the rated output power is the target attenuation value. An isolator is not needed, and the power amplifier can output rated power under different working frequencies by adjusting the attenuation value of the automatic level control device.

The invention discloses a power control method and device and related equipment, and belongs to the technical field of communication. The method is applied to the electronic equipment, the electronic equipment comprises a radio frequency link, and the radio frequency link comprises a power amplifier, a filter and an antenna port which are connected in sequence; the method comprises the steps that the working frequency of an antenna port and the first reference frequency corresponding to the frequency band range to which the working frequency belongs are acquired, and the first reference frequency is the passband edge frequency of a filter; determining a target frequency interval according to the first reference frequency, and adjusting the transmitting power of the power amplifier to be the maximum transmitting power under the condition that the working frequency is in the target frequency interval; or determining the target transmitting power of the antenna port according to the first reference frequency, and adjusting the transmitting power of the power amplifier according to the target transmitting power.

The invention provides a frequency interference processing method, electronic equipment and a storage medium, and the method comprises the steps: obtaining the current working frequency band information and current signal state information of a baseband communication module in a target communication chip, and obtaining the current working frequency and frequency information of a memory in the target communication chip; according to the current working frequency band information and the frequency information, a non-interference frequency library corresponding to the memory is determined, and the non-interference frequency library comprises at least one non-interference frequency; and determining a target working frequency of the memory according to the non-interference frequency library, the current working frequency and the current signal state information. The problem that the sensitivity of the baseband communication module is interfered by the harmonic of the memory is solved.