1375 results about "Passband" patented technology

The invention discloses a self-adaptive multi-dimensional adjustment metering box based on the Internet of Things, and relates to the technical field of intelligent monitoring of power equipment. The problem of measurement distortion caused by high fixed threshold false triggering rate, weak anti-aliasing capability and multi-source data asynchronization in a high-dynamic industrial scene in the prior art is solved. Multi-parameter acquisition is realized through the sensing acquisition module and the annular buffer area; a reconfigurable FIR filtering module is adopted to dynamically switch a low-pass / band elimination mode to suppress aliasing interference; noise features are extracted by combining spectral kurtosis analysis and concept drift detection, and a dynamic threshold value is generated by using exponentially weighted moving average and a sliding window standard deviation; a multi-channel time sequence is aligned through an IEEE 1588 protocol, and cloud parameter closed-loop optimization is realized based on extended Kalman filtering and a particle swarm algorithm; according to the method, the threshold fault tolerance, the high-frequency transient signal capturing precision and the multi-source heterogeneous data fusion reliability in a high-noise environment are remarkably improved.

The invention provides a double-fed fan broadband oscillation suppression method based on adaptive impedance remodeling, and the method comprises the steps: carrying out the optimization of an RSC current control link for the resonance suppression selection of a subsynchronous / supersynchronous frequency band, adding an adaptive virtual impedance controller, selecting a five-order Butterworth low-pass filter, and carrying out the adaptive improvement of the low-pass filter, the response characteristic in the passband can be adaptively increased along with the frequency, and the characteristic of adapting to the oscillation frequency change is realized; active damping control is added in a GSC current control link for resonance suppression selection of a middle frequency band, and parameter deviation and uncertainty of a controlled object are considered, so that an impedance remodeling effect on the GSC is not influenced by parameters of the converter, and phase compensation can be adaptively performed when the parameters of the converter change. Through frequency-band-division control, the negative damping characteristics of the DFIG in a sub / super-synchronous frequency band and a middle frequency band are improved, a grid-connected system of the DFIG can adapt to different power grid working conditions, and oscillation in a broadband range is effectively restrained.

The invention relates to the technical field of heat dissipation control, and discloses a heat dissipation fan multi-order filtering control method and device, and the method comprises the steps: collecting the operation parameters of a multi-fan heat dissipation system, and carrying out the construction of a dynamic state space model, and obtaining a system operation state equation and a temperature observation equation; inputting the system operation state equation and the temperature observation equation into an expectation maximization sliding window iteration extended Kalman filter to obtain a system state estimation value and a prediction error covariance matrix; performing three-stage series design on the cut-off frequency of the low-pass filter, the passband range of the band-pass filter and the coefficient of the adaptive filter to obtain a system multi-order filtering control model; based on a system multi-order filtering control model, an airflow coupling influence coefficient matrix among multiple fans is calculated, the total energy consumption, the noise level and the heat dissipation efficiency are subjected to optimization solution, a fan control optimization parameter set is obtained, the heat dissipation efficiency is guaranteed while the energy consumption is reduced, and dynamic balance among all control units is achieved.

The invention discloses a dual-polarization angle selective surface structure with a wide passband angle and out-of-band steep drop, which is formed by mutually connecting a plurality of periodic units, each periodic unit is provided with at least two metal structure layers from top to bottom, and an air dielectric layer unit is arranged between the adjacent metal structure layers; wherein the metal structure layer comprises a dielectric substrate, an upper surface metal layer and a lower surface metal layer are arranged on the upper surface and the lower surface of the dielectric substrate respectively, and the upper surface metal layer and the lower surface metal layer are connected through a metal via hole formed in the dielectric substrate; the upper surface metal layer and the lower surface metal layer have the same structure, and each periodic unit internally comprises Jerusalem-type metal sheets which are circumferentially distributed around the center of the dielectric substrate; the Jerusalem type metal sheet support arms are mutually connected; the middle through hole of the cross-shaped metal main arm of the Jerusalem metal sheet is the end part of the metal via hole, and the metal via hole is connected with the middle part of the cross-shaped metal main arm at the corresponding position of the upper and lower surfaces of the dielectric substrate.

The invention provides a TF-SAW resonator, a preparation method thereof and a filter, and relates to the technical field of semiconductors. The interdigital electrode comprises piston structures, sub-bus bars and metal bumps, the piston structures are positioned at two ends of the acoustic part, it can be understood that the piston structures are arranged at the tail end areas of the acoustic part on the electrode finger strips, and larger sound velocity difference is realized by changing the sound velocity of the tail end areas; therefore, the transverse mode is reflected in different directions to avoid energy dissipation caused by resonance; on a propagation path of a transverse mode, the sub bus bars and the metal bumps are sequentially arranged, clutter interference is eliminated by causing sound velocity difference, so that clutter mode interference is inhibited to the greatest extent, the Q value is improved, the insertion loss flatness in a passband is improved, and the performance of the TF-SAW resonator is further improved.

The invention discloses an MPSK demodulation and Doppler tracking combined processing method for an underwater sound direct spread system, and belongs to the field of underwater wireless communication and signal processing thereof. The method specifically comprises the following steps: firstly, receiving underwater direct sequence spread spectrum communication signals at the same time by a multi-channel array element of any array, and preprocessing; then, signal synchronization and Doppler coarse estimation are carried out on each array element; carrying out carrier removal on the received signal of each array element to obtain a baseband signal; then, despreading the passband signal of each channel to obtain a despread related signal, and extracting signal peak information; furthermore, after fine Doppler estimation and compensation are carried out on each channel, multi-channel soft value information combination is carried out. And finally, decoding the merged signal by applying BICM-ID to obtain soft value information of each symbol under high-order modulation, and obtaining information bits carried by each symbol through decoding, the underwater communication and measurement joint integrated technology is realized, and the method has certain anti-noise performance.

A signal processing circuit has a first signal loop with a first signal processing block and a first feedback path that extends around the first signal processing block, the first signal processing block having a frequency dependence that causes the first signal loop to generate a passband. A second signal processing block is downstream of the first signal loop. A second feedback path extends from downstream of the second signal processing block to upstream of the first signal processing block. In operation, the first feedback path reinforces a signal in the passband and the second feedback path conditions the signal at an output downstream of the first signal processing block.

The present invention relates to a millimeter-wave low-pass / high-pass reconfigurable filter, comprising a series-parallel reconfiguration structure, a passband compensation inductor, and a ground-direct connection reconfiguration structure, capable of achieving the interchange of a passband and a stopband of the filter in two modes, reconfigurable output in both high and low bands, low loss at the passband and good mirror signal suppression at the stopband, and hardware reuse. The millimeter-wave low-pass / high-pass reconfigurable filter of the present invention has a simple circuit structure, and is suitable for use in a multi-band millimeter-wave reconfigurable transceiver.

The invention relates to a circularly polarized quasi-absorption filtering phased-array antenna. A unit of the antenna comprises a multi-layer dielectric substrate, a semi-cured layer, a metal floor, a stacked patch and an orthogonal H-shaped gap, the first dielectric substrate is provided with a parasitic square loop, the second dielectric substrate is provided with a cross-shaped strip, and radiation zero points are introduced to the upper and lower edges of a passband respectively; the 3dB orthogonal directional coupler and the L-shaped feeder form a feed network, circularly polarized radiation is realized through slot coupling, and an isolation port of the 3dB orthogonal directional coupler is connected with a 50-ohm resistor, so that the energy of a lower stop band is absorbed, the energy of an upper stop band is reflected, and a quasi-absorption filtering characteristic is presented; the antenna is compact in structure and easy to process, has wide axial ratio bandwidth and good filtering performance, and when array scanning is 0-45 degrees, the overlapping impedance bandwidth is 12%, the axial ratio bandwidth is 15.8%, and the maximum scanning loss is 2.3 dB; the antenna is compact in structure and easy to process, has wide axial ratio bandwidth and good quasi-absorption filtering performance, and has huge potential in millimeter wave satellite communication application.

The embodiment of the invention provides an excitation signal generation method and system and a digital eddy current sensor, and the method comprises the steps: outputting a square wave signal through a pulse width modulation assembly of a microcontroller unit, and enabling the frequency and resolution of the square wave signal to be adaptive to eddy current probes with different inductance values; inputting the square wave signal into a low-pass filter for filtering, and setting the cut-off frequency of the low-pass filter, the suppression times of higher harmonics and the attenuation slope so as to output a sine wave signal with a target total harmonic distortion range; the amplitude of the sine wave signal is collected in real time, and the pulse width modulation duty ratio and the passband gain of a low-pass filter are dynamically adjusted in combination with a digital control algorithm, so that the sine wave signal is subjected to self-adaptive adjustment and correction and is output; and taking the sine wave signal as an excitation source of an eddy current probe, and driving the eddy current probe to carry out nondestructive testing. According to the invention, the excitation signal which gives consideration to high-frequency signal generation, deep harmonic suppression and digital adaptive adjustment can be generated.

The invention discloses a multi-pass optical filter and a preparation method thereof, and the method comprises the steps: selecting a main reference channel, and carrying out the difference frequency modulation excitation through narrow linewidth laser, and obtaining optical transmission coupling data; performing periodic disturbance detection on the observation channel to obtain spectrum drift associated data; modulating deposition power and air pressure according to the spectrum drift associated data to form a crosstalk suppression layer; forming a three-layer dielectric structure with increasing optical thickness and a periodically changing coupling regulation layer on the crosstalk suppression layer; and performing temperature modulation annealing treatment to form an inter-channel steady-state coupling structure, and establishing a spectrum drift compensation parameter. The technical scheme of the invention can systematically characterize the correlation drift of the multi-channel spectral characteristic along with the micro process or service disturbance, accurately quantify the coupling relationship between different passbands, and solve the technical problem that the correlation drift between the passbands cannot be completely captured in the existing discrete measurement mode. The phenomenon of'array misfocus' in a miniature multispectral system is effectively avoided, and the precision and stability of the multi-pass optical filter are improved.

The invention discloses a bilateral steep-drop wide-passband frequency selective surface with a stable angle. The unit structure of the frequency selective surface sequentially comprises a first metal layer, a first dielectric substrate, a second metal layer, a second dielectric substrate and a third metal layer from top to bottom, the frequency selective surface units are regular hexagons, and the units are closely arranged in an equilateral triangle grid form; the first metal layer and the third metal layer are identical in structure and are composed of six identical petal-shaped metal patches which are in rotational symmetry. The second metal layer is a regular hexagonal ring; the overall structure is symmetrical about the second metal layer. According to the invention, while wide-passband filtering is realized, the bilateral steep drop characteristic of the passband is considered, the stable passband characteristic can be maintained under the condition of oblique incidence, and in addition, the filter has a relatively low section and is easy for curved surface conformal.

The invention provides a signal acquisition system of a photoelectric detector. In the signal acquisition system, a transimpedance pre-amplification circuit is arranged at the output end of the photoelectric detector, and a passive high-pass filter circuit is connected between the transimpedance pre-amplification circuit and a post-voltage amplification circuit. And a feedback network is formed in the transimpedance pre-amplification circuit and is used for converting a current signal output by the photoelectric detector into a proportional first voltage signal and outputting the proportional first voltage signal. The filter circuit is a third-order LC high-pass filter circuit and is used for suppressing direct current, low frequency and self-beat frequency components and keeping a 10-90MHz pass band flat. The rear voltage amplification circuit adopts a voltage amplification structure of a voltage operational amplifier, the voltage gain Av is 6-10, and the super-band gain is limited through a shunt capacitor. According to the embodiment of the invention, through the structure and parameter setting, the noise gain peak value is suppressed, and the system stability is improved.

The invention discloses a zigzag structure-based low-pass high-absorption energy selection surface, which comprises a plurality of periodically distributed units, each unit sequentially comprises a frequency selection layer, a dielectric layer and an energy selection layer from top to bottom, the frequency selection layer comprises a first dielectric substrate and a plurality of metal zigzag structures and resistors on the upper surface and the lower surface of the first dielectric substrate, and the metal zigzag structures and the resistors are arranged on the upper surface and the lower surface of the first dielectric substrate. The selectable layer comprises a second dielectric substrate, and a plurality of metal block structures and diodes on the upper surface of the second dielectric substrate; and the frequency selection layer and the selectable layer are separated by the dielectric layer. The energy selection surface and the frequency selection surface are matched in impedance through the dielectric layer, so that when low-power electromagnetic waves are incident, a low-frequency passband with low insertion loss is realized, and a relatively wide absorption frequency band is formed outside the passband; and when high-power electromagnetic waves are incident, a reflection frequency band with relatively high shielding effectiveness is realized in a working frequency band, and a relatively wide absorption frequency band is formed outside the band. The device is simple and clear in overall design structure principle and has a wide application prospect.

The invention provides a TF-SAW resonator, a preparation method thereof and a filter, and relates to the technical field of semiconductors. The interdigital electrode comprises piston structures, sub-bus bars, metal bumps and recesses, the piston structures are positioned at two ends of the acoustic part, it can be understood that the piston structures are arranged at the tail end areas of the acoustic part on the electrode finger bars, and larger sound velocity difference is realized by changing the sound velocity of the tail end areas; therefore, the transverse mode is reflected in different directions to avoid energy dissipation caused by resonance; according to the TF-SAW resonator, the sub bus bars, the metal bumps and the recesses are arranged on a propagation path of a transverse mode, clutter interference is eliminated by causing sound velocity difference, so that clutter mode interference is inhibited to the greatest extent, the Q value is improved, the insertion loss flatness in a passband is improved, the performance of standing waves in the passband is improved, the insertion loss is improved and the like, and the performance of the TF-SAW resonator is further improved.

The invention discloses an ultra-low profile broadband circularly polarized microstrip patch antenna array and a design method thereof, the antenna array is constructed on a single-layer thin dielectric substrate, and an antenna unit is formed by combining a substrate integrated waveguide resonant cavity and a microstrip patch resonator embedded in the center of the substrate integrated waveguide resonant cavity. On the premise that the antenna size is not increased, the combination of the double resonators is realized. The adjacent antenna units are arranged at zero intervals and share the metal columns surrounding the edge of the substrate integrated waveguide resonant cavity. Two pairs of polarization orthogonal degenerate modes with similar resonance characteristics are introduced by utilizing a central gap, an annular gap and four symmetrical gaps connected with the central gap and the annular gap, so that four resonance points with similar radiation characteristics and similar resonance frequencies and two axial ratio zero points are formed, and synchronous broadening of impedance bandwidth and axial ratio bandwidth is realized. In addition, a radiation zero point is generated at the position close to the upper edge of the passband along the radiation counteracting effect on the two sides of the annular gap, and therefore the out-of-band rejection performance of the antenna is improved.

The invention discloses a gate fault detection method and system, and relates to the technical field of fault diagnosis and health monitoring, and the method comprises the steps: collecting a gate vibration signal, extracting a main modal frequency, setting a sampling frequency and a passband range, designing a finite impulse response filter for filtering, and carrying out the optimization through a particle swarm algorithm, thereby obtaining an enhanced signal; extracting features in the enhanced signal for integration to obtain a feature vector, mapping the feature vector to a discrete state set by using a rule threshold matching method, and obtaining a gate state; the method comprises the following steps: acquiring historical data for sampling, constructing a state transition probability matrix, calculating a steady-state probability vector according to the state transition probability matrix, combining a gate state, generating a state sequence track, setting an influence factor and a weight by using an empirical rule, and calculating a fault occurrence probability for risk detection; according to the method, the gate fault detection precision, efficiency and reliability are remarkably improved.

The embodiment of the invention provides a tunable cavity filtering coupler, an antenna device and communication equipment, and relates to the technical field of mobile communication. The tunable cavity filtering coupler comprises a dielectric substrate, a base layer and a metal layer arranged on the surface of at least one side of the base layer, the metal layer is provided with an annular coupler and a bias circuit, the annular coupler comprises four center loading branch resonators which are sequentially distributed in the circumferential direction, and the four center loading branch resonators are connected with the bias circuit. Each center loading branch resonator is connected with a variable capacitance diode. The metal layer further comprises feed ports which are in one-to-one correspondence with the center loading branch resonators and are connected with the center loading branch resonators. The biasing circuit is arranged on the periphery of the annular coupler in a surrounding mode, and the biasing circuit is electrically connected with the variable capacitance diode. According to the tunable cavity filtering coupler, the antenna device and the communication equipment provided by the invention, frequency selectivity and passband tunable functions are realized, and multi-band operation requirements are met.

A band-pass filter includes a first port, a second port, first to third high-pass filters provided between the first port and the second port in this order from a first-port side in a circuit configuration, and a low-pass filter provided between the second high-pass filter and the third high-pass filter in the circuit configuration. Each of the first to third high-pass filters forms an attenuation pole on a low-pass side of the passband. A frequency of the attenuation pole formed by the second high-pass filter is higher than a frequency of the attenuation pole formed by each of the first and third high-pass filters.

Acoustic resonators with piston mode patches are disclosed. In one aspect, an interdigitated acoustic resonator (300) having plural fingers (308(1)-308(N)) or digits includes a modified piston mode rail. In particular, the piston mode rail is replaced with individual piston mode patches (320(1)-320(N); 322(1)-322(N)) that may be uniform or varied in size. Selection of patch size allows spurious modes to be suppressed to have a smooth filter passband with low overall insertion loss and minimal ripple. Further, the patches may be made through a monolithic process, which reduces overall production cost, complexity and cycle time.

The present invention belongs to the technical field of mechanical fault diagnosis and signal processing, and specifically relates to a bearing fault diagnosis method, system, equipment and medium based on a multi-channel analog filter feature network. The method constructs a multi-channel analog filter feature extraction network, uses multiple parallel bandpass filter channels to extract bearing vibration signal characteristics, and combines an analog neural network classifier to perform fault classification. Signal preprocessing includes removing DC components, amplitude normalization and segmented processing; the filter passband parameters and classifier parameters are jointly optimized through a particle swarm algorithm, with classification accuracy and decision confidence as fitness functions. The system includes signal acquisition, preprocessing, multi-channel filtering, feature extraction, analog neural network classification and result display modules, achieving low-power, high-real-time bearing fault diagnosis. The present invention solves the problems of high power consumption and large delay of traditional digital processing methods, and is suitable for long-term monitoring and large-scale deployment in industrial sites.

The invention discloses an oscillator and slot-loaded tapered slot antenna, and belongs to the field of wireless communication and radar. Wherein the oscillator arm of the upper pole plate and the oscillator arm of the lower pole plate jointly form an oscillator radiator, a closed inner gap is formed in the slot line arm, the inner gap of the upper pole plate and the inner gap of the lower pole plate jointly form an oscillator gap radiator, and the oscillator arms and the slot line arm define a semi-closed conductor ring radiator; the resonant oscillator radiator, the oscillator slot radiator and the conductor ring radiator are loaded to the traveling wave type tapered slot antenna for expanding the working frequency band of the antenna. According to the broadband tapered slot antenna, multiple working modes can be generated, the weight of the antenna is reduced, and meanwhile the problems that the electrical size of the broadband tapered slot antenna is relatively large, and standing waves of individual frequency points in a passband are large when the bandwidth is very wide are solved; meanwhile, the antenna has a guiding effect on a loading vibrator, and the low-frequency gain is improved; the antenna is small in size, and meanwhile it can be guaranteed that the antenna has good standing wave and radiation performance at low frequency and broadband.

The invention discloses a dual-band non-reflection filter based on a loaded composite spur line structure, which adopts an annular plane microstrip cascade coupling microstrip line structure to realize dual-band filtering response, and loads two pairs of complementary absorption branches to generate a plurality of reflection zero points to realize full-band absorption of signals reflected by an input / output port. A structure based on a composite spur line is loaded at an input / output port to realize higher harmonic suppression, and the spur line generates a stop band effect through coupling between lines, so that suppression of a parasitic passband is realized. In addition, the spur line structure is embedded into the microstrip line, so that the circuit size is effectively reduced, and the insertion loss in a passband can be effectively reduced. The circuit structure provided by the invention not only has the characteristics of simple and compact structure, planarization and easy integration, but also has the advantages of dual-band, band-pass filtering, full-band non-reflection and higher harmonic suppression.

A radio-frequency circuit includes first and second transfer circuits. The first transfer circuit supports reception of a cellular communication system and a satellite system. The second transfer circuit supports transmission and reception of the cellular communication system. The first transfer circuit includes a first filter circuit and a first low-noise amplifier circuit. The first filter circuit is connected to a first antenna connection terminal and has a pass band including a cellular receive band and a satellite receive band. The first low-noise amplifier circuit is connected to the first filter circuit. The second transfer circuit includes a second filter circuit, a power amplifier circuit, and a second low-noise amplifier circuit. The second filter circuit is connected to a second antenna connection terminal and has a pass band including the cellular receive band and a cellular transmit band corresponding to the cellular receive band.

The invention discloses an amplitude-phase-adjustable microstrip line high-directional coupling structure and a multichannel coupler. The amplitude-phase-adjustable microstrip line high-directional coupling structure comprises a dielectric plate, and an input port, a transmission port, a coupling port and an isolation port which are arranged on the dielectric plate, the input port is connected with the transmission port through the microstrip line, and the transmission port is used for being connected with the antenna port; the coupling port is connected with the isolation port through the two-stage coupling passband; the coupling port is used for outputting a coupling signal; the length of the coupling part of the two stages of coupling passbands can be adjusted; and a phase regulator for regulating the phase is arranged between the two stages of coupling passbands. The phase difference is formed through the distance between two stages of coupling, the amplitude and the phase are adjusted, coupling output is achieved at a coupling port, high isolation is achieved at an isolation port, and the problem that due to the fact that upper and lower media of a microstrip line high-directionality coupler are not uniform, the phase velocities of odd and even modes in the microstrip coupler are different, and the directionality of the microstrip line high-directionality coupler is poor is effectively solved. And the directivity is poor.

An apparatus and method of determining the concentration of first and second substances within a sample by exposing the sample to radiation and filtering the radiation transmitted from the sample using a first filter having a number of pass bands at wavelengths corresponding to absorption peaks in a desired quasi-periodic absorption spectrum of the first substance to be detected, and modulating the wavelengths of the pass bands of the first filter. Additionally, filtering the radiation transmitted from the sample using a second filter having a number of pass bands at wavelengths corresponding to absorption peaks in a desired quasi-periodic absorption spectrum of the second substance to be detected, and modulating the wavelengths of the pass bands of the second filter. The concentration of the first and second substances is determined by determining the difference in the maximum and the minimum intensities of the radiation transmitted by the sample.

The invention provides a rapid intelligent design method and system for a surface acoustic wave filter, and the method comprises the steps: building a physical model of a surface acoustic wave resonator based on electromagnetic simulation software, carrying out the calculation to obtain a corresponding admittance response, and obtaining a series of surface acoustic wave resonator admittance responses and key structure parameters for constructing a target surface acoustic wave filter; preprocessing the collected sample data set to form an input vector of a deep learning model; constructing a reversely designed neural network model, learning a mapping relation between structure parameters and admittance response, and predicting the structure parameters of the serial and parallel surface acoustic wave resonators; and in combination with a COM model, the admittance of the series resonator and the admittance of the parallel resonator are converted into an S matrix, so that a filtering passband is obtained. According to the method, the problems of high calculation cost and accuracy caused by complex acoustic characteristics and material parameters are avoided, the defects that a traditional numerical simulation method is time-consuming, tedious and complex in circuit topology process are overcome, and the rapid and intelligent design requirement of the surface acoustic wave filter is met.

The invention relates to the technical field of microwave communication, and discloses a microwave communication radio frequency front-end transceiver chip and a dynamic bandwidth allocation method and system. The system comprises a radio frequency front-end transceiver chip; the control module is electrically connected with the radio frequency front-end transceiver chip and is configured to receive the digital signal sent by the analog-to-digital conversion module so as to extract signal characteristic parameters, and the signal characteristic parameters comprise a signal-to-noise ratio, a multipath fading coefficient and a target scene communication protocol parameter; determining an initial bandwidth allocation strategy and a power control threshold according to the target scene communication protocol parameters; based on the signal-to-noise ratio and the multipath fading coefficient, the working frequency band and the passband width of the multi-frequency-band filter bank are dynamically adjusted through an adaptive particle swarm optimization algorithm, and a gain control signal of the power amplification module is generated, so that the transmitting power is minimized on the premise of meeting the communication distance requirement, and dynamic bandwidth allocation is completed. And the performance and the adaptability of microwave communication in a complex scene are remarkably improved.

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.

The invention relates to the technical field of passive filter measurement, in particular to a method and device for accurately measuring parameters of a passive filter and electronic equipment. The method specifically comprises the following steps of: constructing an unstable factor of a passive filter parameter based on fluctuation characteristics of data in a passband upper limit sequence, a passband lower limit sequence and a cut-off frequency sequence of passive filter passband frequency and a fluctuation similar condition between the sequences; the unexpected response characteristic value of the passive filter is constructed based on the abnormal degree of abnormal points in all extreme points in the frequency response curve, so that the influence of unexpected harmonic peaks or trapped waves is avoided, the overall characteristic of unexpected response of the filter in the whole frequency range is reflected, and the influence of parameter measurement errors caused by non-ideal factors is eliminated; correcting the attenuation value of the passive filter in combination with the unstable factor; the accuracy of the detection result of the attenuation value of the passive filter is improved, quantitative compensation of performance changes of the filter is achieved, and therefore the accuracy and reliability of the parameter measurement result of the passive filter are improved.