146results about How to "High bandwidth" patented technology

The invention provides a low-noise amplifier and a radio frequency front-end module, and the low-noise amplifier comprises an input matching circuit, a first-stage power amplification circuit, an inter-stage matching circuit, a second-stage power amplification circuit and an output matching circuit. The inter-stage matching circuit comprises a first inductor, a second inductor and a first capacitor; the second-stage power amplification circuit is of a cascode structure; and the output matching circuit comprises a third inductor and a fourth inductor which are coupled with each other. According to the low-noise amplifier, the high-frequency gain, the in-band gain flatness, the isolation degree, the stability and the output matching bandwidth of the low-noise amplifier can be improved.

The application discloses a mapping method and device, equipment and readable storage medium, and relates to the technical field of communication, so as to improve the robustness of 5G system to frequency selective interference. The method comprises the following steps: acquiring a layer number; and performing modulation symbol to time-frequency resource mapping according to the layer number. The embodiment of the application can improve the robustness of 5G system to frequency selective interference.

The application relates to the technical field of laser chips, and provides a novel-structure laser chip and a manufacturing method thereof.The laser chip comprises a grating layer and one or more functional layers grown on the grating layer; the grating layer is etched with a plurality of grating grooves to form a Bragg grating, and a partial structure of the grating layer is reserved below the grating grooves; wherein the grating grooves are obtained by photoetching a pattern on the one or more functional layers and performing etching at the photoetched pattern position.The application utilizes etching characteristics, removes a resist layer, maintains the integrity of the laser chip through the reserved partial structure, reduces the internal thermal effect of the laser chip while forming the Bragg grating structure, and improves the bandwidth and performance of the laser.

This invention discloses a short-range, high-precision time-frequency synchronization positioning method and system, comprising: constructing a frequency-modulated continuous wave (FM-CVT) signal; embedding the FM-CVT signal into a Wi-Fi signal; loading the FM-CVT signal into the digital domain to obtain an initial FM-CVT signal; converting the initial FM-CVT signal into an analog signal via digital-to-analog conversion, and up-converting the analog signal; receiving the up-converted analog signal, down-converting the analog signal, and obtaining a received FM-CVT signal via analog-to-digital conversion; calculating the time delay and frequency offset between the initial FM-CVT signal and the received FM-CVT signal to obtain a time-frequency offset value; and compensating the time-frequency offset value for subsequent FM-CVT signals to obtain a synchronized FM-CVT signal. This invention utilizes the high time-frequency resolution characteristics of FM-CVT signals, accurately estimates the time delay and frequency offset through cross-correlation or Fourier transform, and performs closed-loop compensation, significantly improving the time-frequency synchronization accuracy and positioning accuracy in short-range scenarios.

The invention provides an ultrasonic transducer and ultrasonic cleaning equipment, the ultrasonic transducer comprises a piezoelectric exciter and a vibration radiant panel, the vibration radiant panel is fixed on the piezoelectric exciter, a power supply is electrically connected with the piezoelectric exciter, so that the piezoelectric exciter can generate longitudinal vibration, and the longitudinal vibration of the piezoelectric exciter can excite bending vibration of the vibration radiant panel. The longitudinal vibration sandwich type piezoelectric ultrasonic transducer solves the defects that an existing longitudinal vibration sandwich type piezoelectric ultrasonic transducer is small in radiation area, weak in longitudinal displacement amplitude, long in longitudinal size and the like to a great extent, and has the advantages of being small in space needed by operation, large in sound radiation area and sound radiation power, small in size and the like. The ultrasonic transducer can be widely applied to the application requirements of miniaturization and thinning of the installation space of the ultrasonic transducer. Meanwhile, the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer can be influenced by the length, and / or the width and / or the thickness of the vibration radiant panel, so that the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer is further improved through the size of the vibration radiant panel.

The application discloses a kind of photoelectric hybrid tensor convolution operation system and method, the system uses same frequency double optical frequency comb, combines wave division multiplexing and demultiplexing technology, combines IQ modulator array, utilizes optical mixer to mix, utilizes photoelectric balance detector to carry out photoelectric conversion, finally utilizes oscilloscope and the like data acquisition device output tensor convolution operation result.The application, data packet is modulated to different optical frequency comb channel, the total signal spectrum spliced in frequency domain is wide, simultaneously reduce the bandwidth requirement of single channel to modulated electrical signal, with higher signal-to-noise ratio and greater bandwidth;In addition, data packet is modulated simultaneously in different channel, complete convolution result can be obtained by once operation via mixer and balance detector, and the application has the advantages of large throughput and adjustable configuration, simple operation, convenient and flexible adjustment;System uses all-fiber device, can be integrated, suitable for subsequent on-chip integration.

The application belongs to the technical field of antenna in the communication system comprehensive design, and particularly relates to a kind of omnidirectional broadband antenna based on multimode resonance, L-shaped folded dipole, rectangular loop, U-shaped branch and SMA joint are located at the lower surface of dielectric substrate, feed line is located at the upper surface of dielectric substrate, first metallized via hole and second metallized via hole in the up-down direction are opened on dielectric substrate, the outer conductor of SMA joint is connected with the right arm of L-shaped folded dipole, the inner conductor of SMA joint is connected with one end of feed line by passing through the right arm of L-shaped folded dipole and first metallized via hole, the other end of feed line is connected with the left arm of L-shaped folded dipole by passing through second metallized via hole, the application generates new resonance frequency by bending traditional dipole to form L-shaped folded dipole;rectangular loop is added around L-shaped folded dipole, two new resonance modes are introduced, and the bandwidth of antenna is further widened.

This disclosure provides a photodetector. The detector includes a substrate and, sequentially stacked on the substrate surface, an N-type doped layer, an absorption region, a P-type doped layer, and a converging structure. The first cross-sectional area of ​​the absorption region along the direction parallel to the substrate surface is smaller than the second cross-sectional area of ​​the P-type doped layer parallel to the substrate surface; the surface of the P-type doped layer away from the absorption region is a photosensitive surface. The converging structure is used to focus incident light from the photosensitive surface to the absorption region, so that the photodetector converts the incident light into an electrical signal. This detector can simultaneously achieve high responsivity and high bandwidth.

The application provides a photonic neural network system based on a multi-task neural network, which comprises: an optical computing module, taking a photonic artificial intelligence chip as a core, modulating an optical signal, and completing multiplication, summation and nonlinear operation of high-precision and high-speed optical analog quantities; a multi-task neural network module, having a main branch neural network and multiple secondary branch neural networks, and capable of simultaneously processing multiple classification tasks and regression tasks; and an optical computing communication and control module based on FPGA, connected with the optical computing module and the multi-task neural network module, and used for realizing real-time and high-speed communication of the optical computing module and the multi-task neural network module. The system has the characteristics of high bandwidth and low energy consumption, utilizes high-dimension parallel computing to greatly reduce the time of original neural network serial operation, has the advantages of large network scale and fast parallel operation speed, and can improve recognition accuracy and shorten training time on the basis of a single task.

This application discloses a wavelength division multiplexing (WDM) system, device, WDM communication method, and medium, belonging to the field of wireless communication technology. A multi-wavelength laser is used to generate input light of different wavelengths; a WDM multiplexer is used to combine and modulate the input light to obtain channels with different wavelength intervals; a demultiplexer is used to demultiplex the narrow wavelength interval channels of the WDM multiplexer to increase the number of channels in the system. This application provides a blue-green WDM optical communication system and implementation method based on a demultiplexer, using blue-green light WDM technology to improve system capacity and achieve a high-bandwidth and moderate-attenuation wireless optical communication system. WDM visible light communication is achieved through a multiplexer / demultiplexer with fine wavelength intervals for visible light.

The low-profile vehicle-mounted antenna comprises a PCB monopole antenna, the PCB monopole antenna comprises a board body, antenna radiation patterns are arranged on the front face and the back face of the board body respectively, the board body directly feeds through a cable, and a printing grounding structure is arranged on the board body, forms electromagnetic coupling with the cable and is used for expanding the bandwidth of the antenna. According to the low-profile vehicle-mounted antenna, the antenna radiation patterns are arranged on the two sides of the plate body respectively, so that a low-profile flat structure is achieved, and the height of the antenna is reduced. And meanwhile, by reasonably utilizing the coupling effect of the cable and the printed grounding structure on the radiation patch, the bandwidth of the antenna is expanded, and the full-band stable performance is realized. And direct feeding is realized through the cable without an additional and complex feed network, so that the effects of simplifying the structure and reducing the cost are achieved.

This invention discloses a photonic neural synapse device with a dual-micro-ring structure and a convolutional computation network model. The device includes a front resonant ring, a rear resonant ring, and two coupled phase-change material (PCM) films. The two PCM films are matched and correspond to the front and rear resonant rings, respectively. Synaptic weighting is achieved by controlling the coupled PCM films. The front and rear resonant rings are used to split the input optical signal in the bus waveguide into a 50:50 ratio, and output the difference signal current through a balanced photodetector. The photonic neural synapse of this invention has the advantages of high bandwidth and high speed. Once the synaptic weights are determined, it is a passive device with theoretically zero power consumption. Furthermore, this invention designs a dual-micro-ring structure, which ensures that the modulation of light does not affect the resonant wavelength, improving modulation accuracy, reducing optical transmission loss, and broadening the range of synaptic weights. This invention can be widely applied in the field of micro-nano optoelectronics.

The utility model discloses a microstrip patch antenna which comprises a dielectric substrate and a radiation patch. The radiation patch is arranged on the dielectric substrate, the radiation patch is E-shaped, the parallel edge of the E-shaped radiation patch is defined as a first sub-radiation patch, the vertical edge of the E-shaped radiation patch is defined as a second sub-radiation patch, and the length of the first sub-radiation patch is larger than or equal to 2.1 mm and smaller than or equal to 2.5 mm. The E-shaped structure enables the current to bypass between the first sub radiation patch and the second sub radiation patch, which is equivalent to increasing the electrical length of the radiation patch and reducing the resonant frequency of a fundamental mode, so that the low-frequency band bandwidth is broadened; the edges of the first sub-radiation patch and the second sub-radiation patch can generate strong electromagnetic field coupling to excite an additional parasitic resonance mode, so that the frequency band is further widened, and the bandwidth of the microstrip patch antenna is effectively widened. Wherein the first sub radiation patch of 2.1 mm to 2.5 mm enables the resonant frequency of the microstrip patch antenna to range from 43.7 Ghz to 55.1 Ghz, the relative bandwidth is 23%, and high bandwidth is achieved.

The invention discloses an OFPGA chip packaging structure, which comprises an OFPGA silicon chip main body and a glass substrate, TGV through holes, fine pitch waveguides and coupling gratings are arranged on the glass substrate, and the OFPGA silicon chip main body and the glass substrate are bonded through micro salient points and covalent bonds to realize mechanical fixation and signal interconnection; the glass substrate realizes vertical electrical interconnection through high-density TGV through holes, optical signal transmission is realized through fine-pitch waveguides and coupling gratings, and the micro convex points are metal convex structures formed on the glass substrate. The space utilization rate is greatly increased; ultra-short-distance electric signal transmission in the vertical direction is achieved through the high-density TGV through holes, and signal delay is greatly reduced; the thermal stress after bonding is effectively reduced by means of the similar thermal expansion coefficient characteristic of the glass substrate and the silicon chip, and the stability of photoelectric signal separation transmission is ensured by combining high-precision matching interconnection of the TGV through holes and the micro convex points.

A synaptic transistor device with a wide spectral response is characterized by comprising: a floating gate layer for capturing light signals of different wavelengths to generate photogenerated carriers; a tunneling layer disposed on the floating gate layer for storing photogenerated carriers generated within the floating gate layer; an active layer disposed on the tunneling layer for transporting charge carriers and photogenerated carriers; source and drain electrodes, two source and drain electrodes symmetrically disposed on the active layer for providing a driving voltage to drive the flow of charge carriers and photogenerated carriers in the active layer, forming a circuit; a substrate disposed at the bottom of the synaptic transistor device for serving as the basis for fabricating the synaptic transistor device; a gate electrode disposed on the substrate for inducing charge carriers in the active layer; and an insulating layer disposed between the gate electrode and the floating gate layer for isolating the gate electrode and the active layer from conduction, wherein the floating gate layer is made of quantum dots with a wide spectral response, and a heterojunction structure is formed between the floating gate layer and the active layer.

The application discloses a millimeter wave flat plate slot array antenna with a filtering function, and relates to the technical field of radio frequency communication. The copper-based micro coaxial line-quasi-planar waveguide transition structure is connected with the staggered vertical layout cross-coupled millimeter wave filter, and is integrated with the quasi-planar waveguide feed power division network to realize a three-dimensional quasi-planar low-loss integrated feed circuit, and the feed circuit excites the high-mode flat plate slot antenna array through a coupling slot. The application utilizes the multi-layer metal plane and vertical design capability of electrochemical additive technology, breaks through the key problems of low-process-complexity low-loss interconnection integrated transition interface, low-loss miniaturized filtering structure and array antenna remaining limited special-shaped physical space integrated, and meets the actual application requirements of miniaturization and integration of the millimeter wave radio frequency communication system.

The utility model discloses an electro -optical modulator is applied to the field of semiconductor technology, include: substrate, substrate surface is provided with photodiode, photodiode includes the epitaxial layer, P type doped area and N type doped area that connect gradually, the lattice constant of epitaxial layer is greater than the lattice constant of P type doped area, the utility model discloses the epitaxial layer of lattice constant greater than P type doped area is arranged to one end of P type doped area, because of the difference of lattice constant between epitaxial layer and P type doped area, will produce compression stress, can improve hole mobility in P type doped area, reduce resistance, and can increase electro -optical modulator bandwidth.

This disclosure relates to a method and apparatus for generating a controllable source scanning signal based on compensation, which can improve the quality of seismic exploration data. The method includes: acquiring single-shot seismic record data of an exploration area; performing spectral analysis on the single-shot seismic record data to obtain an amplitude-frequency spectrum; dividing the amplitude-frequency spectrum into at least two frequency segments based on the amplitude distribution of the amplitude-frequency spectrum; calculating the compensation for the scanning duration of each frequency segment in the at least two frequency segments based on the amplitude distribution of the theoretical scanning spectrum, obtaining a reference scanning duration for each frequency segment aligned with the amplitude of the theoretical scanning spectrum; determining the target scanning duration for each frequency segment under a preset total scanning duration based on the reference scanning duration; and generating a target scanning signal for the exploration area by concatenating the start and end frequencies of each frequency segment and the corresponding target scanning duration.

The embodiment of the invention provides a low-noise broadband SerDes receiver analog front end, method and equipment, and belongs to the field of integrated circuit design. The broadband SerDes receiver analog front end comprises an input terminal, a continuous time linear equalizer, a variable gain amplifier and a trans-impedance amplifier which are connected in sequence. The continuous time linear equalizer and / or the variable gain amplifier comprise / comprises at least one reverse coupling peaking inductance structure; the transimpedance amplifier comprises a low-impedance path noise shunting structure; the reverse coupling peaking inductance structure of the variable gain amplifier is mutually coupled with an inductor in the low-impedance path noise shunting structure of the trans-impedance amplifier to form a three-coupling inter-stage feedback structure. According to the invention, the problems of high noise, limited bandwidth and difficult consideration of gain and power consumption in the prior art are effectively solved, and the high-performance and low-power-consumption receiver analog front end supporting 100Gbps PAM4 signal transmission is realized.

The utility model discloses a desktop computer mainboard on-board BGA central processing unit DDR6 memory structure, which belongs to the technical field of desktop computer mainboard structures, and comprises a mainboard, an on-board BGA central processing unit is arranged in the middle of the upper end of the upper surface of the mainboard, a heat conduction plate is arranged above the on-board BGA central processing unit, and the heat conduction plate is connected with the mainboard. The mainboard comprises an onboard BGA central processing unit, a DDR6 memory slot is formed in one side of the onboard BGA central processing unit, a 24PIN power supply interface is formed in one side of the DDR6 memory slot, a plurality of vertically-arranged SATA interfaces are formed below the 24PIN power supply interface, and a startup jumper needle port and a Type-C needle port are sequentially formed in the lower edge position of the upper surface of the mainboard from right to left. The CPU of the mainboard is integrally packaged by adopting the BGA, and meanwhile, a special DDR6 slot is designed to be matched with a relevant IO interface and a mainboard needle port, so that the mainboard has better transmission rate, higher stability, lower power consumption and larger capacity, can meet the requirement of a current computer for large throughput data volume of AI large model operation, and is externally connected with a plurality of electronic devices.

The utility model discloses a broadband anti-interference down-conversion device and a radio frequency receiving system, and relates to the wireless communication technology. The device comprises a first frequency converter, a second frequency converter, a power divider and a local oscillator unit. Wherein the first frequency converter and the second frequency converter realize two-stage frequency conversion of radio frequency signals, the second frequency converter adopts a dual-channel ping-pong switching structure, and two channels are connected with the output end of the first frequency converter through the power divider; the local oscillation unit provides independent local oscillation signal input for the first frequency converter, the second frequency converter and the local oscillation unit. According to the utility model, the broadband and high-dynamic interference suppression performance is realized through the combination of two-stage frequency conversion and a dual-channel ping-pong switching structure.

This application discloses a method, apparatus, storage medium, and lidar for obtaining etching depth. The method includes: obtaining a target etching depth corresponding to a target coupling length ratio at the center wavelength of an optical signal, wherein the target etching depth is any metric value selected from multiple etching depths for etching a waveguide; when the target coupling length ratio is the smallest coupling length ratio in the set of ratios, the target etching depth is determined as the waveguide etching depth for etching the waveguide; the set of ratios includes coupling length ratios corresponding to each etching depth in the set of multiple etching depths, and the coupling length ratio is obtained by considering the optical refractive index corresponding to each etching depth and the sensitivity of the optical refractive index to the shift of the center wavelength. Using this application, the operational stability of the optical coupler can be guaranteed, thereby ensuring the stability of the lidar system.

This disclosure relates to an antenna assembly and a terminal device. The antenna assembly includes: a first radiating arm to a third radiating arm and a first matching circuit. A first gap is provided between the first radiating arm and the second radiating arm, and a second gap is provided between the second radiating arm and the third radiating arm. A first terminal of the first matching circuit is connected to the end of the second radiating arm near the first gap, and a second terminal of the first matching circuit is grounded. The first matching circuit has a first state and a second state. When the first radiating arm transmits and receives signals in various low-frequency bands, the first matching circuit is in the first state, so that the second radiating arm has the effect of loading the physical length of the low-frequency signal path, thereby improving the performance and efficiency of the low-frequency band antenna. When the third radiating arm transmits and receives signals in various mid-to-high-frequency bands, the first matching circuit is in the second state, so that the second radiating arm excites a parasitic current mode at the high-frequency signal position, thereby widening the bandwidth of the high-frequency signal and improving the efficiency of the mid-to-high-frequency antenna.

The invention discloses a low-dropout linear voltage stabilizing circuit, which is characterized by comprising an error amplifier, a frequency compensation circuit, a feedback loop and a power device, the output of the error amplifier is cascaded with the power device to form a circuit main loop; the feedback loop is used for providing a feedback signal reflecting the change of the output voltage of the power device, and the frequency compensation circuit adopts a power tube structure with a pseudo ESR resistor to realize frequency compensation of a main loop of the circuit together with the feedback loop; the error amplifier adopts two-stage circuits, one end of the first-stage circuit is connected with a reference signal, the other end of the first-stage circuit is connected with a feedback signal of the feedback loop, and the two signals are compared and input to the second-stage circuit in a current form; and the second-stage circuit adopts a feedforward coupled AB output stage structure, so that rail-to-rail output of the output voltage is realized, the magnitude of the current provided by the power device to the outside is controlled, and the output voltage is stable.

The application discloses a kind of broadband power dividers based on super material unit, it is related to power divider technical field, including coupling microstrip line and rectangular dielectric substrate, wherein coupling microstrip line is T-shaped distribution on dielectric substrate, it is characterized in that, further include multiple cross square super material units;The dielectric substrate is equipped with power division input interface, first power division output interface and second power division output interface;The super material unit is symmetrically distributed in the left and right sides of coupling microstrip line;The dielectric substrate is equipped with power division input interface, first power division output interface and second power division output interface and is respectively connected with the three end portions of the T-shaped coupling microstrip line.This application is on the basis of guaranteeing the working bandwidth of power divider, by adding super material to the miniaturization design of broadband power divider, with the advantages and beneficial effects of reducing the volume of power divider, reducing transmission line loss.

The invention relates to an antenna, base station equipment and electronic equipment, and the antenna comprises a phase inverter and a ground branch knot. Each of the phase inverter and the ground branch knot is provided with at least one bending part, the bending part is provided with a shunt branch knot, and the shunt branch knot is communicated to form two sides of the bending part so as to provide a current shunt. Therefore, the current path is increased by additionally arranging the shunt branches, and branches with different lengths are provided for high frequency and low frequency, so that the anti-phase effect and the radiation effect under a wide frequency band are improved, and the gain level is improved.

The invention discloses a high-speed germanium-silicon photoelectric detector with ultrahigh responsivity, which comprises a surface incidence photoelectric detector, and the surface incidence photoelectric detector comprises a substrate, an absorption region, a polycrystalline silicon layer, a top contact region, a top electrode region, a mask layer, a bottom contact region, a bottom electrode region and a metal electrode layer, a light reflection structure is additionally arranged on the surface incidence photoelectric detector, and the light reflection structure is located on the periphery of an absorption area of the surface incidence photoelectric detector. The photoelectric detector has the advantages that the absorption area with the thickness of 400-800nm can be realized, light emitted to the edge of the absorption area is reflected through the light reflection structure, and high responsivity can be kept on the premise of high bandwidth.

The embodiment of the present application discloses an antenna and a broadband matching network, the broadband matching network comprises: a passive impedance matching circuit and a non-Foster impedance matching circuit. The passive impedance matching circuit has a first port and a second port; the second port is connected with a coaxial port. The non-Foster impedance matching circuit has an input end and an output end; the input end is connected with the first port, and the output end is connected with a feed end of the antenna. The passive impedance matching circuit comprises at least one capacitor and at least one inductor which are connected with each other; and the non-Foster impedance matching circuit comprises at least one transistor and at least one capacitor, inductor or resistor which are connected with each other. The antenna of the embodiment of the present application realizes impedance matching between a coaxial cable and the feed end of the antenna by using the broadband matching network, realizes the broadband design of the antenna, and provides convenience for the miniaturization of the antenna.

The invention relates to a real-time vibration compensation device and method for a cold atom gravimeter. The device comprises a Raman laser, a rubidium atomic group, a reflector, an accelerometer, an optical phase-locked loop module, an analog-to-digital converter, a reference clock source, a heteronuclear FPGA, a direct frequency generation module and an upper computer. Two pairs of Raman lasers oppositely act on a rubidium atomic group in the vertical direction, the accelerometer and the reflector are in rigid connection, analog differential signals of the accelerometer enter the analog-digital converter, converted digital signals enter the heteronuclear FPGA for digital calculation, and the reference clock source serves as clock signals of the digital circuit. A signal calculated by the heteronuclear FPGA enters the direct frequency generation module and is output to the optical phase-locked loop to control the phase of the Raman laser, and the heteronuclear FPGA communicates with the upper computer through TCP connection. The vibration real-time compensation device for the cold atom gravimeter is fully digital, and has the advantages of large dynamic range, low noise and high-precision phase synchronization compensation capability.

This invention relates to a method and apparatus for suppressing synchronous oscillations in a power synchronous control converter. The method involves obtaining a first difference ΔP between a reference value of active power and a measured value of active power at the grid connection point of the power synchronous control converter; obtaining a first difference ΔQ between a reference value of reactive power and a measured value of reactive power at the grid connection point of the power synchronous control converter; limiting the synchronous frequency component of the first difference ΔP using a first band-stop filter to obtain a second difference ΔP; obtaining a reference phase of a modulation signal based on the second difference ΔP; limiting the synchronous frequency component of the first difference ΔQ using a second band-stop filter to obtain a second difference ΔQ; calculating a reference voltage amplitude of the modulation signal based on the second difference ΔQ; and generating a modulation signal for controlling the power synchronous control converter based on the reference phase and reference voltage amplitude of the modulation signal. This invention can effectively suppress synchronous oscillations during the operation of a power synchronous control converter.