21 results about "Phase shift module" patented technology

The invention discloses a wafer nanoscale defect detection system and method based on multi-mode and feature fusion, the system comprises a multi-band LED light source group, a CMOS camera, a telecentric imaging lens and a displacement platform, the multi-band LED light source group is arranged at the uppermost part, and the CMOS camera, the telecentric imaging lens and the displacement platform are sequentially arranged below the multi-band LED light source group; the multiband LED light source group comprises an angle gt; an incident light LED with the angle of 70 degrees, an incident light LED with the angle of 10-30 degrees, a coherent light source and a phase shift module; the CMOS camera shoots a wafer picture, and the telecentric imaging lens captures details on the surface of the wafer; the displacement platform bears the wafer and carries out displacement. According to the method, the limitation of two-dimensional detection is broken through, and on the premise of not sacrificing the detection speed, high-sensitivity, high-precision and quantifiable online automatic detection of fisheye, pinhole and segment difference defects is realized through an innovative optical system design, a quasi-three-dimensional morphology reconstruction technology and an advanced deep learning network architecture.

The application discloses a power amplifier and a radio frequency front end module. The power amplifier has a signal input end and a signal output end, and comprises a first phase shift module, a power amplification module, a second phase shift module and a balun module. The first phase shift module is connected to the signal input end and is used for outputting a pair of first radio frequency signals. The absolute value of the phase difference of the pair of first radio frequency signals is less than or equal to a first specified difference. The power amplification module is connected to the output end of the first phase shift module. The second phase shift module is connected to the output end of the power amplification module and is used for outputting a pair of second radio frequency signals. The balun module is connected between the second phase shift module and the signal output end. The balun module is used for sending the pair of second radio frequency signals to the signal output end after current combination. Since the balun module is used for combination at the rear end of the power amplifier, the frequency band of the power amplifier is wider.

The invention discloses a beam splitting phase shift optical path system which comprises at least one waveguide structure. The waveguide structure includes a coupling-in section, a coupling-out section, and at least one group of beam-splitting phase-shifting sections located between the coupling-in section and the coupling-out section. The beam-splitting phase-shifting branch part comprises at least two stages of beam-splitting phase-shifting modules which are arranged along a first direction, and each stage of beam-splitting phase-shifting module comprises at least one beam-splitting unit and at least one reflecting unit; the at least two stages of beam splitting and phase shifting modules comprise a first-stage beam splitting and phase shifting module and an ith-stage beam splitting and phase shifting module, the first-stage beam splitting and phase shifting module is located on a propagation path of an incident beam, and the ith-stage beam splitting and phase shifting module is located on an emergent light path of the (i-1) th-stage beam splitting and phase shifting module. Wherein i > = 2 and i is an integer. Light beams are expanded through the multi-stage beam splitting and phase shifting module, the light beam expansion scheme is simple and efficient, the problem that in the prior art, in optical waveguide light beam expansion, the cost of an optical machine is high is solved, and small size and high optical efficiency are achieved.

The application discloses a kind of multi-frequency common aperture instantaneous multi-beam reflection phased array antenna, comprising: feed source, for distributing input radio frequency signal to each array element on reflection array surface;Reflection array surface is made of multiple passive array elements, and array element is used to reflect incident electromagnetic wave;By adjusting the phase of each array element, the regulation of reflected beam is realized;Multiple filter phase shift modules, each array element is connected with a filter phase shift module, and the filter phase shift module includes filter and phase shifter;Filter is used to select the signal of specific frequency range, and phase shifter is used to adjust the phase of each array element reflected wave;Beam control system is connected with filter phase shift module, for coordinating and controlling entire phased array antenna, to realize the required beam direction.The application has significant advantages, including higher integration, lower power consumption, more effective heat dissipation performance and more economical cost structure, which makes phased array antenna can well meet the needs of multi-task system.

The invention provides a closed-loop calibration system and method for IQ imbalance, and relates to the technical field of communication, the system comprises a digital transmitter, a power amplifier, a low noise amplifier and a digital receiver which are connected in sequence, and further comprises a digital correlator, a resolving unit, a phase controller and an IQ imbalance compensator; and the power amplifier is connected with the low-noise amplifier through a coupling loop. According to the invention, the analog phase and the digital phase of the loop are adjusted through the phase controller, and the simultaneous calibration of IQ imbalance in the digital transmitter and the digital receiver is realized by combining the four cross-correlation operation of the digital correlator and the parameter joint estimation of the calculation unit without a phase shift module. Phase switching can be realized by using an existing tuning capacitor of a power amplifier or a low-noise amplifier, the design is simple, and a coupling loop is close to an antenna port, so that the calibration precision is not easily influenced by interference and radiation of an internal radio frequency module; and meanwhile, hardware is easy to realize, the complexity is low, the estimation precision is high and the stability is strong.

Embodiments of the present disclosure provide an antenna beamforming method, a storage medium, an electronic device, and a computer program product. The method comprises: acquiring received signal strength information of an antenna array, and determining a target beam direction on the basis of the received signal strength information; on the basis of the target beam direction and a preset neural network model, determining a control signal parameter corresponding to the target beam direction; and on the basis of the control signal parameter, adjusting the amount of phase shift of a phase shift module connected to the antenna array, so as to control the phase or phase difference of a first transmitted signal of the antenna array, so that the antenna array performs beamforming in the target beam direction.

The application discloses a mirror surface shape measurement system and method based on superfast high-precision laser scanning, and the system and method solve the problems of low surface shape detection precision, small surface shape detection size, insufficient absolute positioning precision and susceptibility to vibration in the environment in the prior art surface shape detection technology, and specifically comprise a pulse laser, a beam expanding and light splitting module, an interference module, a four-step phase shift module, a detection module, a receiving module and an upper computer; the pulse laser emits pulse laser; the beam expanding and light splitting module divides the pulse laser into 0-order diffraction light and ±1-order diffraction light which are parallel to each other; the interference module receives the 0-order diffraction light and the ±1-order diffraction light to form multi-order diffraction interference light; the four-step phase shift module performs four-step phase shift light splitting on the multi-order diffraction interference light; the detection module receives the phase shift light beams, and performs photoelectric conversion to form 0-order phase shift signals, +1-order phase shift signals and -1-order phase shift signals; the receiving module receives the 0-order phase shift signals, the +1-order phase shift signals and the -1-order phase shift signals; and the upper computer is used for restoring the surface shape information of a mirror to be measured.

The embodiment of the invention provides a frequency locking circuit device which can be applied to the technical field of integrated circuit chip control, in particular to resonant frequency locking of a target load. The frequency locking circuit device comprises an integral phase shift module and a driving control module. The integral phase shift module is used for performing integral phase shift on the current working electric signal at one end of the target load to generate a current integral phase shift signal; wherein the current integral phase shift signal realizes 360-degree phase shift relative to the current working electric signal; and the driving control module is connected with the output end of the integral phase shift module and is used for updating the current working electric signal of the target load according to the current integral phase shift signal to form a self-oscillation loop of which the gain is greater than or equal to 1 so as to realize resonant frequency locking. The embodiment of the invention also provides a control method and equipment of the frequency locking circuit device, a storage medium and a program product.

The invention relates to a dual-band laser shearing speckle interference measurement system and a measurement method. The system comprises a dual-band laser light source, paraxial and coaxial illumination modules, a shearing module (independently adjusting the shearing amount in the X / Y direction), a phase shift module, a 4f image transmission system (comprising an optical path compensation plate), a dichroic beam splitter prism and a dual-image acquisition unit. Through synchronous illumination of a dual-band light source, light path consistency is ensured in combination with an optical path compensation design, and synchronous high-resolution measurement of the X / Y direction deformation first-order derivative of a to-be-measured sample is realized. The method comprises the steps of pixel calibration, shearing amount dynamic adjustment, phase resolving, deformation derivative calculation, optimal displacement determination and the like, and supports static and quasi-static deformation real-time monitoring. According to the invention, the spatial resolution, the measurement range and the measurement sensitivity are improved through dual-band synchronous measurement; dynamically adjusting the shear amount to expand the measurement range; the device is suitable for samples with different sizes and scattering characteristics, and is suitable for high-precision deformation analysis in the fields of industrial detection, precision manufacturing and scientific research.

The invention discloses a fast demodulation device based on a BOTDR system. The device comprises a photoelectric detector, a low noise amplifier, a splitter, a first mixer, a second mixer, a first filter, a second filter, a first data acquisition system, a second data acquisition system, a phase deviation module, a local oscillator and a signal processing module. According to the invention, the frequency mixer, the filter and the data acquisition module are arranged to avoid the situation that a traditional local oscillator scanning method needs measurement at N different frequency points to obtain a frequency contour, and the demodulation speed is improved.

The invention discloses a voice processing module and electronic equipment. The voice processing module comprises a substrate, a first microphone, a second microphone and a phase processing module, wherein the first microphone, the second microphone and the phase processing module are arranged on the substrate; a main controller is arranged on the substrate; the hole distance between the center point of the first sound hole in the first microphone and the center point of the second sound hole in the second microphone ranges from 2mm to 6mm. The phase processing module is in signal connection with the main controller and comprises a phase shifting module and a phase comparison module, and the phase shifting module is arranged on a signal output channel of one of the first microphone and the second microphone and used for delaying the phase of an audio signal on the corresponding signal output channel; the phase comparison module is used for acquiring a phase difference signal of an audio signal acquired by the first microphone and an audio signal acquired by the second microphone, and the main controller controls an output signal of the voice processing module according to the phase difference signal. The voice processing module and the electronic equipment aim at reducing the size of the voice processing module and the electronic equipment while achieving the effects of directional pickup, voice enhancement, noise reduction and the like.

The present disclosure relates to a multi-channel digital control radio frequency switch chip and a method for applying same. The chip includes a digital control module, a storage module, and a radio frequency switch phase shift module. The digital control module is configured to read first code table information from the storage module or write second code table information into the storage module based on a digital signal input from the digital signal input port. The storage module is configured to store the first code table information and the second code table information. The radio frequency switch phase shift module is configured to control, based on the first code table information or the second code table information, an operation state of a radio frequency device connected to the plurality of radio frequency output ports.

The application provides a multi-phase clock generation circuit and a clock phase modulation method, the multi-phase clock generation circuit comprises: a quadrature signal generation module, which delays an input signal by T / 4, T / 2 and 3T / 4 to obtain quadrature signals with phase shifts of 0°, 90°, 180° and 270° and outputs the quadrature signals to a digital phase shift module; a control code generation module, which sets a control code signal and outputs the control code signal to the digital phase shift module; and the digital phase shift module, which receives the quadrature signals and the control code signal to adjust the quadrature signals by using the control code signal. The application designs a high-speed clock signal phase modulation device, realizes comparison of signals above 3.5Gsps and solves the problem of phase modulation of high-speed clock signals.

The invention discloses a time delay compensation method for a composite millimeter wave and optical fiber transmission link. A phase shifting module with the initial phase shifting amount being 0 and a dimmable delay line with the initial delay amount being tau 0 are additionally arranged at the middle end of a link, and the phase shifting module and the dimmable delay line are adjusted through the following method that a frequency sweeping signal is generated at the near end, and the frequency sweeping signal and a signal to be transmitted are input into the phase shifting module together and then transmitted; obtaining a roughly measured composite link time delay value tau r according to the link transmission response; after the delay amount of the adjustable optical delay line is adjusted to be tau 0-tau r, the steps are executed repeatedly, and a roughly measured millimeter wave space link delay value tau true is obtained; performing whole-cycle ambiguity resolution on the roughly measured millimeter wave space link time delay value tautrue by combining high-frequency carrier waves to obtain an accurate millimeter wave space link time delay value; and adjusting according to the phase shift amount of the phase shift module. The invention also discloses a time delay compensation device for the composite millimeter wave and optical fiber transmission link. According to the invention, the time delay value of each link in the composite link can be measured and correspondingly compensated.

This application discloses an optical computing apparatus and method, and relates to the field of optical processing technologies. The apparatus implements two-dimensional Fourier transform of input data. The apparatus includes a beam splitting phase shift module and a beam combination module. The beam splitting phase shift module is configured to receive a plurality of input optical signals that indicate input data, and output a plurality of groups of intermediate optical signals based on the plurality of input optical signals. The beam combination module is configured to obtain a plurality of output optical signals based on the plurality of groups of intermediate optical signals, where output data indicated by the plurality of output optical signals is data obtained through two-dimensional Fourier transform performed on the input data.

The invention discloses a power distribution method and device, and the device comprises a power distribution element which comprises an input end, a first output end, a second output end, a phase power conversion module connected between the input end and the first output end, and a power division phase shift module connected between the phase power conversion module and the second output end. The phase power conversion module is used for receiving a first signal from the input end and a second signal from the power division phase shift module, and performing power distribution on the first signal and the second signal to output a third signal to the first output end and output a fourth signal to the power division phase shift module; the power ratio of the third signal to the fourth signal changes along with the change of the phase difference of the first signal and the second signal; and the power division phase shift module is used for outputting a second signal to the phase power conversion module and outputting a fifth signal to a second output end based on the received fourth signal. Therefore, the power loss is reduced, and the system efficiency is improved.

The invention provides an electric energy standard device based on quantum input, which belongs to the technical field of metering and comprises a gain amplification module, a phase shift module, a voltage amplification module, a current transconductance amplification module, a voltage feedback module, a current feedback module and a standard electric energy signal generation module. The gain amplification module is configured to receive an input quantum voltage signal and amplify the quantum voltage signal to obtain a first path of voltage signal and a second path of voltage signal; the voltage amplification module is configured to linearly amplify the first voltage signal and output a standard voltage signal; the phase shift module and the current transconductance amplification module are configured to perform phase shift and transconductance amplification on the second voltage signal in sequence and output a standard current signal; the standard electric energy signal generation module is configured to perform standard electric energy metering to obtain a standard electric energy signal. According to the electric energy standard device based on quantum input, the output precision of the power electric energy standard source can be improved.

The utility model provides a phase shifter and a base station antenna, the phase shifter comprises at least one medium phase shifting block, the medium phase shifting block comprises a medium block and at least two microwave transmission lines arranged in the medium block, one end of each microwave transmission line extends out of the medium block, and the other end of each microwave transmission line extends out of the medium block; the dielectric block is used for connecting an antenna unit or other dielectric phase shift blocks; and the parameters of the microwave transmission lines are different and / or the areas of the microwave transmission lines covered by the dielectric blocks are different, so that phase shifting of the antenna units in different proportions is realized. According to the scheme, the loss caused by the power division matching network in the feed network and the loss caused by the impedance matching part in the dielectric phase shift module can be reduced, the topological structure is simplified, and the gain upper limit of the base station antenna is improved.

The application relates to the fields of phased array, microwave photon and optoelectronic device technology, and particularly discloses an optical control microwave beam forming network chip based on photoelectric cooperation. The network chip comprises an electric signal input and modulation module, an optical signal transmission and phase shift module and an optical signal receiving and demodulation module; the electric signal input and modulation module is used for loading a to-be-modulated electric signal onto an optical domain, simultaneously regulating the phase of the optical signal, and transmitting the optical signal to the optical signal transmission and phase shift module; the optical signal transmission and phase shift module is used for expanding the phase regulation range of the optical signal and outputting the optical signal to the optical signal receiving and demodulation module; and the optical signal receiving and demodulation module is used for converting the received optical signal back to an electric signal, performing amplification processing and phase regulation of the electric signal. The application realizes high-precision phase shift in the electric domain, completes wide-range phase regulation coverage in the optical domain, and realizes high-precision wide-range phase regulation based on photoelectric cooperation.

The embodiment of the invention provides a beam forming method of an antenna, a storage medium, an electronic device and a computer program product, and the method comprises the steps: obtaining the received signal strength information of an antenna array, and determining a target beam direction according to the received signal strength information; determining a control signal parameter corresponding to the target beam direction according to the target beam direction and a preset neural network model; and adjusting the phase shift amount of a phase shift module connected with the antenna array according to the control signal parameter, and further controlling the phase or phase difference of a first transmitting signal of the antenna array, so that the antenna array is subjected to beam forming in the target beam direction. According to the invention, the problems that the received signal is unstable, the network speed is reduced and even the network is disconnected when the terminal is too far away from the base station or an obstacle exists between the terminal and the base station in the prior art are solved, the antenna performance of the terminal equipment is greatly improved, the network connection stability and the data throughput of the terminal equipment in a weak signal scene are optimized, and the user experience is improved. And the communication distance of the terminal equipment is improved.

A single-photon detection device including an interference unit. The interference unit includes: a signal dividing module configured to divide input signals into first signals and second signals; a first signal path coupled to the signal dividing module and configured to receive and transmit the first signals; a second signal path coupled to the signal dividing module and configured to receive the second signals and filter out and transmit signals with a preset frequency component; a phase shift module arranged in the first signal path or the second signal path and configured to shift the phase of transmission signals by 180 degrees; and a coupling module coupled to the first signal path and the second signal path and configured to receive output signals of the first signal path and the second signal path and then output after coupling. The single-photon detection device eliminates many gating interference signals, and optimizes other aspects.