54 results about "Phase shift module" patented technology

The embodiment of the invention provides a metasurface phase shift module, an antenna array and an electromagnetic wave phase modulation method, the metasurface phase shift module comprises a transmission metasurface and a bias unit, and the transmission metasurface is provided with an adjustable electronic component; the bias unit is connected with the adjustable electronic element and inputs bias voltage to the adjustable electronic element; wherein the transmission metasurface performs phase regulation and control on the received electromagnetic wave through the adjustable electronic element and the bias voltage. According to the invention, the problems of low precision, low flexibility, slow response and the like of a base station electrically-tunable antenna scheme caused by adjusting the phase of the electromagnetic wave through the physical movement of a mechanical structure in the related technology are solved.

The invention discloses a differential signal synthesis circuit of a double-IQ mixer, which belongs to the technical field of radio frequency microwave testing and comprises two single-ended IQ mixing modules, a 180-degree phase shift module and an in-phase combination module or a power division module. The single-ended IQ frequency mixing module is used for up-converting the single-ended IQ baseband signal to radio frequency or down-converting the radio frequency signal to the single-ended IQ baseband signal; the 180-degree phase shift module is used for converting an input signal into two paths of signals with a phase difference of 180 degrees; and the power division module is used for converting the radio frequency input signal into two paths of signals with the phase difference of 0 degree. According to the invention, the IQ mixer with a differential structure is constructed, so that the microwave band of the IQ mixer is comprehensively improved in the index aspects of local oscillator leakage, even-order component suppression, common-mode interference suppression, signal-to-noise ratio and the like; according to the invention, single-ended IQ mixers with various types and complete frequency bands can be constructed into a differential structure form, and signal indexes in numerous application scenes are improved.

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 invention discloses a force balance control system for a constant-alternating-current-to-direct-current micro-electro-mechanical gyroscope. The force balance control system comprises a gyroscope closed-loop driving module, a detection modal force balance control module and a phase shifting module, the gyroscope closed-loop driving module is used for tracking the resonant frequency of a driving mode and generating a sinusoidal signal of the resonant frequency as a self-feedback excitation signal and a vibration signal of a driving mode electrode; the phase shift module is used for performing phase shift on the vibration signal as a force balance alternating current excitation signal; and the detection modal force balance control module is used for acquiring a control signal for resisting electrode vibration in the detection modal of the micro-electro-mechanical gyroscope according to the force balance alternating current excitation signal and a force balance direct current excitation signal self-fed back in the detection modal force balance control module. The resonant frequency of the modal electrode is tracked and driven in real time, stable force balance of the modal electrode is detected, the high requirement for the dynamic performance of a circuit in a force balance feedback path is lowered, and the dynamic response speed and the anti-interference capacity of a system can be effectively improved.

A high-gain automatic phase modulation quartz vibrating beam accelerometer control circuit comprises a feed-through suppression module, the feed-through suppression module and a quartz vibrating beam resonator form a parallel resonance unit, and the output of the parallel resonance unit is connected with the input of a front-end amplification module. The output of the front-end amplification module is connected with the input of the high-pass filtering module and the first input of the automatic phase control module, the output of the high-pass filtering module is connected with the first input of the dynamic phase shift module, and the second input of the dynamic phase shift module is connected with the output of the automatic phase control module. The output of the dynamic phase shift module is connected with the input of the differential driving module through the low-pass filtering module, the square wave shaping module and the amplitude control module; the output of the differential driving module is connected with the input of the feed-through suppression module, the driving end of the quartz vibrating beam resonator and the second input of the automatic phase control module; according to the invention, low-noise driving of the high-impedance quartz vibrating beam is realized, and the loop phase error is dynamically compensated to improve the stability and resolution of the accelerometer.

The invention relates to the technical field of weighing, in particular to a dynamic weighing filtering circuit and a dynamic weighing filtering method.The dynamic weighing filtering circuit comprises a weighing sensor, a signal processing module, a filtering module and a phase shifting module, and the dynamic weighing filtering circuit is obtained by collecting an electric signal output by the weighing sensor and conducting amplification, filtering and phase processing on the electric signal. The interference processing burden of the subsequent software side is reduced, so that a high-quality digital signal source is output in the dynamic weighing process, the overall detection precision is improved, and the MCU operation pressure is relieved.

The invention provides a cable-free network structure and an antenna system, and belongs to the technical field of communication. The cable-free network structure comprises a reflecting plate; the first phase shifting module comprises a power division phase shifting network and a corresponding first phase shifting medium group, the power division phase shifting network is provided with a first input port and a plurality of first output ports, the first input port is used for receiving signals, and the plurality of first output ports are used for outputting equal phase differences; the second phase shifting module comprises a plurality of two-way power dividers and corresponding second phase shifting medium groups, each two-way power divider comprises a second input port and two second output ports, the second input ports are connected with the first output ports, and the second output ports are used for sending signals; and the transmission mechanism respectively drives the first phase shifting medium group and the second phase shifting medium group to move at a preset displacement ratio so as to realize equal-phase-difference output in the same period. The cable-free network structure provided by the invention can simply realize equal-phase-difference output in the same period.

The invention relates to the technical field of electronic circuits, and discloses a phase shift circuit, a step-down switching converter group and a converter chip. The phase-shifting circuit comprises a time-delay phase-shifting module which comprises a plurality of time-delay phase-shifting units; an input end of the decoder is connected with different input voltage signals, and a plurality of output ends of the decoder are respectively connected with control ends of the plurality of delay phase shift units; the positive input end and the negative input end of the comparator are respectively connected with the output end of the delay phase shift module and reference voltage; the R end of the trigger is connected with a clock signal, the output end of the trigger is connected with the input end of the delay phase-shifting module, the S end of the trigger is connected with the output end of the comparator, and the decoder is used for responding to a specific input voltage signal to control the corresponding delay phase-shifting unit to be switched on so as to output the clock signal after phase shifting through the comparator. According to the invention, phase shifting can be effectively carried out on the clock, multi-phase operation is carried out in a multi-phase manner, enough load current required by engineering application can be provided, inductive current ripples can be offset, and output voltage ripples are smaller.

The present invention discloses a relay node download method and device based on an optical frequency comb. The present invention is used to address the problem of difficulty for nodes in obtaining frequency information transmitted in a link in a time-frequency information transmission system. The present invention is characterized in that an optical comb signal transmitted and a return optical comb signal in the optical comb-based time-frequency transmission system link are obtained through an optical coupling module. The transmitted optical comb signal is converted into an electrical signal through a photoelectric detection module, and then two electrical signals are obtained through a power distribution module. The center frequencies of the electrical bandpass filters connected to the two electrical signals are then adjusted to obtain low-order harmonic components and high-order harmonic components with a frequency doubled. The return optical comb signal is mirrored, and the two low-order harmonic components are connected to a phase detection module to obtain relative delay information. Based on this delay information, the high-order harmonic components are directly phase-shifted through a phase shift module to restore the original signal. Compared with the prior art, the present invention fully utilizes the characteristic of optical comb signals containing multiple frequency components, avoids the use of complex electrical components such as frequency dividers and multipliers, reduces costs, significantly reduces electrical noise at the download node, and improves the stability of node frequency extraction.

The present application provides a dual-frequency dual-polarization antenna unit, a subarray phase-shifting module and a phased array antenna array, wherein the antenna unit includes a radiation loading unit, a horn antenna and an orthogonal coupler; the subarray phase-shifting module includes a transmitting and receiving feeding network and a plurality of dual-frequency dual-polarization antenna units arranged in a straight line; the dual-frequency dual-polarization phased array antenna array includes a plurality of dual-frequency dual-polarization phased modules arranged in sequence; by integrating the orthogonal mode coupler into the radiating antenna unit, dual-frequency dual-line polarization is realized and the mutual interference between the transmitting and receiving ports is reduced; by adopting a broadband horn antenna as a basic radiating unit, co-aperture radiation of transmitting and receiving is realized; a radiation loading unit is added above the antenna to suppress the sidelobe level and improve the main polarization gain; a low-loss transmitting and receiving air waveguide feeding network is adopted to realize equal-radiation and in-phase excitation of the antenna unit, thereby improving the compactness of the array structure and effectively reducing the profile height; through the modular design of the subarray of the phased array, the phase-shifting radio frequency module is reduced to reduce the cost.

This phase-quadrature interferometer (1) with polarization-maintaining optical fibers, each comprising a first axis and a second axis with different refractive indices, the interferometer (1) comprising a starting optical fiber (9) optically connecting, via its first axis, a linearly polarized laser source (3) and a first coupler (5), a reference optical fiber (11) optically connecting, via its first axis, the first coupler (5) and a second coupler (7), a measurement optical fiber (15) optically connected to the second coupler (7), a fourth optical fiber (43) and a fifth optical fiber (45) exiting the second coupler (7) to a phase-shifting module (47), and four optical sensors (49) configured to perform a phase-quadrature measurement of the light intensity received by the optical sensors (49). Figure for the abstract: Fig. 1

The invention provides a millimeter wave active phase shifter for correcting a phase error, and the active phase shifter comprises a signal conversion module, a phase trimming module, a differential signal generation module, and a phase shifting module, and is characterized in that a radio frequency signal is inputted into the signal conversion module to generate a first signal and a second signal; the phase difference between the first signal and the second signal is corrected by adjusting the grounding mode of a phase trimming unit in the phase trimming module, two paths of mutually orthogonal correction signals are obtained, and the two paths of correction signals are subjected to signal conversion through the differential signal generation module and then are input into the input end of the phase shifting module. The amplitude of the input signal is adjusted through a tail current source in the phase shifting module, vector synthesis is carried out on two paths of signals with the same amplitude, a radio frequency signal of a target phase is obtained, and phase shifting of the input radio frequency signal is completed. According to the active phase shifter, phase correction can be carried out on two paths of signals within a certain range by adjusting the grounding mode of the multiple phase fine tuning units, so that the phase difference of the two paths of signals is reduced, and the phase shifting precision is improved.

The invention provides a partial discharge detection device and method for a cable. The three-phase partial discharge detection device of the cable comprises an inversion module, a phase shift module, a switch module and a partial discharge detection module, the partial discharge detection module is connected with the first phase, the second phase and the third phase of the detected cable. The inversion module is used for generating a first phase PWM waveform based on the DC voltage; the phase shift module is used for performing phase adjustment on the first phase PWM waveform to obtain a second phase PWM waveform and a third phase PWM waveform; the switch module comprises a first phase switch, a second phase switch and a third phase switch; the PWM waveform is transmitted to the tested cable by controlling on and off of a switch in the switch module, so that oscillation wave voltage is generated on three phases of the tested cable. By means of the device, the partial discharge signals of the three-phase detected cable can be measured at the same time, and the partial discharge detection efficiency and accuracy of the cable are improved.

The invention discloses a directional antenna with a two-dimensional reconfigurable directional diagram and electronic equipment, and belongs to the technical field of wireless communication. The antenna comprises a phase shift network 100 and an antenna unit 200, the phase shift network 100 comprises a microstrip line 1, a phase shift module 2, an input port 3 and an output port 4, and the phase shift module 2, the input port 3 and the output port 4 are communicated through the microstrip line 1; the microstrip line 1 has a first preset length and is used for carrying out phase adjustment on a signal transmitted by the phase shift module 2; the input port 3 is used for receiving an excitation signal; the input end of the phase shift module 2 is connected with the input port 3, the output end of the phase shift module 2 is connected with one end of the output port 4, and the phase shift module 2 is used for carrying out equal-amplitude phase conversion processing on the excitation signal and outputting equal-amplitude signals with different phase differences to the output port 4; the other end of the output port 4 is connected with the antenna unit 200 and outputs the constant-amplitude signals with different phase differences to the antenna unit 200; and the antenna unit 200 is used for forming beam coverage in directions corresponding to the equal-amplitude signals with different phase differences.

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 invention relates to the technical field of phased array, microwave photon and optoelectronic devices, and particularly discloses a light-operated microwave beam forming network chip based on photoelectric synergy. 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 to an optical domain, regulating and controlling the phase of an 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 and control 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 and carrying out amplification processing and phase regulation and control on the electric signal. According to the invention, high-precision phase shift is realized in an electric domain, wide-range phase regulation and control coverage is completed in an optical domain, and high-precision wide-range phase regulation and control based on photoelectric cooperation is realized.

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.

This application discloses a multi-carrier array antenna transmitter design method, device, and storage medium, relating to the field of wireless communication technology. This method addresses the existing problem of inability to achieve secure and reliable communication in large-scale, complex, multi-user environments. The method includes: constructing a large-scale multicast group system, establishing a spatial coordinate system to determine the positional relationship between the transmitter and the desired user, and obtaining a transmit array steering matrix; constructing a multi-carrier array transmitter, and designing the antenna module, radio frequency module, digital phase shift module, and baseband signal processing module within the transmitter; proposing a layered transmission method, hierarchically designing, optimizing, and solving the transmitter array weighting vector; and utilizing artificial noise scrambling technology to design a baseband signal processing module and calculate an artificial noise projection matrix to maximize the disruption to eavesdroppers. The multi-carrier array antenna transmitter achieves the expansion of the multicast system without increasing the number of transmitting antennas, ensuring secure and reliable communication for more desired users.

The invention relates to a design of a DGS filtering second harmonic image frequency rejection mixer, and belongs to the technical field of microwave circuits. The mixer comprises two Wilkinson power divider modules, a phase shift line module, two DGS filtering second harmonic mixing modules and an intermediate frequency lumped LC phase shift module. The Wilkinson power divider module at the radio frequency input end is divided into two paths to be supplied to the phase shift line module and the second harmonic frequency mixing module for DGS filtering; the output end of the phase shift line is connected with the input end of the DGS filtering second harmonic frequency mixing module; the Wilkinson power divider module at the input end of the local oscillator is divided into two parts to be supplied to the second harmonic frequency mixing module of two DGS filtering; the two input ends of the intermediate frequency lumped LC phase shift module are connected with the output ends of the two DGS filtering second harmonic frequency mixing modules respectively. The output end of the intermediate frequency lumped LC phase shift module is a total output end. According to the invention, the interference of the image frequency signal can be effectively suppressed, the system cost is saved, and an important technical support is provided for realizing a high-performance communication system.

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.

This application belongs to the field of integrated microwave photonics, and discloses a thin-film lithium niobate array phase shifter and optical antenna integrated chip, which monolithically integrates all multi-channel and large element number devices corresponding to the phase shift module and the optical antenna emission module in the microwave optical aperture transformation imaging system. In the microwave optical aperture transformation imaging system, the received microwave signal is up-converted to the optical domain, and a Fourier lens is used to achieve the spatial positioning of multiple beams. However, the differences in the fiber channel environment will cause changes in the fiber refractive index, resulting in delay drift and affecting the imaging quality. The present invention ensures the stability of the received microwave wavefront during the process of microwave up-conversion to the optical domain through an integrated optical array phase shifter and optical antenna, finally realizing precise spatial positioning, reducing the size of the microwave photon information processing system, lowering the system power consumption, and improving the system stability.

The invention discloses a phase shifter circuit capable of automatically adjusting the phase shifting direction and a signal phase adjusting method. The phase shifter circuit comprises a power management module, a phase shifting module and a phase shifting direction control module. The power management module is used for converting input voltage into power supply voltage required by the operational amplifier and the analog switch; the phase shifting module is used for adjusting the size of a lead phase or a lag phase; the phase shift direction control module is used for receiving an external control signal and switching an equivalent structure of the phase shift module through a single-pole double-throw analog switch to realize dynamic switching of an advanced phase shift state or a lagging phase shift state; the equivalent structure of the phase shift circuit is dynamically switched through the single-pole double-throw analog switch, and the cascade step-down design of the power supply management circuit and the resistance-capacitance parameter adjustment of the phase shift circuit are combined, so that the continuous controllable adjustment of an input signal within the full-phase range of-180-180 degrees is realized, the defects that the direction of a traditional phase shifter is fixed and the adjustment range is limited are overcome, and the phase shifter is suitable for large-scale popularization and application. And the flexibility, the automation degree and the precision of phase control are obviously improved.

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 embodiments of this specification provide a signal processing circuit, method, equalizer, and communication device for an equalizer, which are applied to the field of wireless communication technology. The circuit includes a power processing module that separates the radio frequency signal to obtain a first input signal and a second input signal, and outputs the first input signal and the second input signal to a delay module; the delay module adjusts the signal delay information between the first input signal and the second input signal, and outputs the adjusted first input signal and the adjusted second input signal to a phase shift module; the phase shift module performs phase shift processing on the adjusted first input signal and the adjusted second input signal according to the interactive frequency point, and outputs the phase-shifted first input signal and the phase-shifted second input signal to the power processing module; the power processing module synthesizes the phase-shifted first input signal and the phase-shifted second input signal to obtain an RF signal after amplitude adjustment and equalization. This achieves adjustable amplitude equalization of the RF signal.

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 dual-frequency phase-reconfigurable active intelligent reflecting surface system with negative feedback adjustment. The system comprises an intelligent reflecting surface, a phase shift module, a radio frequency amplification module, a negative feedback module and a rear-end control module, the intelligent reflecting surface receives an electromagnetic signal, the phase of the electromagnetic signal is adjusted through the phase shifting module, the amplitude of the electromagnetic signal is adjusted through the radio frequency amplification module, the electromagnetic signal is transmitted to the intelligent reflecting surface, the intelligent reflecting surface reflects the electromagnetic signal subjected to phase modulation amplification processing to a user side, and the negative feedback module receives a returned electromagnetic signal of the user side; and an estimation error signal is calculated and compared with a target parameter, a negative feedback signal is generated and transmitted to the rear-end control module, and the rear-end control module controls the phase shift module and the radio frequency amplification module to perform phase modulation amplification processing so as to realize directional reflection of the electromagnetic signal. According to the invention, signal enhancement can be realized to cope with relatively large physical path fading, and the signal amplification factor can be automatically adjusted under the condition that the received signal is relatively weak.