42 results about "Impedance modulation" patented technology

Provided is a speaker, including: a diaphragm structure including first and second diaphragms, the first diaphragm is configured to push air to vibrate to generate initial sound wave, and a signal of which is modulated based on a signal within an audible sound frequency band; and a cover plate structure enclosing with the diaphragm structure to form sound-generating cavity, the cover plate structure has a sound outlet hole connecting the sound-generating cavity with outside, the initial sound wave in the sound-generating cavity is transmitted to the outside through the at least one sound outlet hole to form a sound signal, the second diaphragm and the cover plate structure generate an acoustic environmental impedance used to modulate the initial sound wave to change sound pressure of the sound signal. The speaker can modulate and output a sound signal covering the audible sound frequency band based on the acoustic environmental impedance.

The invention discloses a beam forming antenna based on a holographic tensor impedance modulation metasurface and a design method thereof, and belongs to the technical field of microwave antennas. The antenna comprises a monopole feed source and a metasurface formed by a periodic array, wherein each tensor impedance unit adopts a three-layer structure comprising an upper slotted metal patch, a middle dielectric substrate and a lower metal grounding layer. A unit library of patch sizes and electromagnetic characteristics is constructed, tensor impedance distribution of each unit is calculated by adopting an iterative algorithm based on a holographic principle, and finally accurate matching with the unit library is realized. According to the invention, the surface wave can be efficiently converted into a specified target wave beam, high-gain and low-sidelobe dual-beam or flat-topped wave beam forming can be realized in a broadband, and meanwhile, the antenna has the advantages of low profile, easiness in integration and low cost, and can be widely applied to a modern wireless communication system.

A plasma processing system is disclosed. A very high frequency (VHF) generator delivers power to a plasma chamber, and a mid-frequency (MF) generator delivers power to the plasma chamber. The VHF generator includes a sensor configured to provide a signal indicative of an impedance of a plasma load that is presented to the VHF generator. The VHF generator further includes a frequency tuner configured to adjust a frequency of the VHF generator within a cycle of the MF generator based on the signal to mitigate impedance modulation caused by the MF generator. Impedance modulation may also be mitigated by a sync line between the VHF and MF generators that allows presetting the VHF generator frequency in synchronization with a cycle of the MF generator.

The 6G satellite communication terminal system comprises a grounding layer, a substrate layer, a feed layer and a radiation metal patch, the grounding layer is arranged at the lower end of the substrate layer, the feed layer is arranged at the upper end of the substrate layer, the radiation metal patch is of a square structure, and the radiation metal patch is arranged on the substrate layer. The radiation metal patches are arranged at the upper end of the feed layer in a matrix mode, cross-shaped gaps are etched in the upper end walls of the radiation metal patches, the radiation metal patches and the feed layer are electromagnetically coupled through the cross-shaped gaps, and the feed layer is provided with a T-shaped strip line matching network. According to the technical scheme of the invention, the electromagnetic decoupling of the Ku / Ka dual-frequency transceiving coplanar phased array can be realized (the isolation degree gt; 45 dB), and a broadband impedance modulation type power amplification technology (24-30 GHz relative bandwidth gt; 25%), a multilayer microwave composite board integrated framework (the thickness is lt; 2 mm, the interconnection loss lt; therefore, the requirement for light weight is met, scanning at a wide angle of + / -60 degrees is supported, and the consistency of a directional diagram of the antenna is also improved.

The application discloses a sound-absorbing metamaterial unit and device based on a coupling resonance structure and a broadband impedance modulation body. The sound-absorbing metamaterial unit comprises the coupling resonance structure and the broadband impedance modulation body. A top plate with holes and a surrounding wall and a bottom plate form the coupling resonance structure with a low-frequency resonance effect. Meanwhile, the broadband impedance modulation body in an acoustic waveguide cavity can adjust the characteristic impedance in a wide range. Due to the synergistic effect of the coupling resonance structure and the broadband impedance modulation body, impedance matching can be achieved in a low-frequency broadband range. The sound-absorbing metamaterial unit provided by the application can have good sound-absorbing effect in a low-frequency broadband range, and has the advantages of simple processing and manufacturing, low cost and high reliability. The sound-absorbing metamaterial unit overcomes the defects of a narrow sound-absorbing frequency band, a complex topological configuration and poor reliability of a traditional acoustic metamaterial sound-absorbing structure.

The invention relates to the technical field of flexible electronic sensors, in particular to a single-path multi-mode flexible sensor array based on impedance modulation signals and a decoupling method, and the single-path multi-mode flexible sensor array comprises N multi-mode sensor units which are connected in parallel, each multimode sensor unit is a passive band-pass filter and comprises M modal measurement modules which are connected in series, the M modal measurement modules are used for responding to changes of M different physical quantities, and N and M are positive integers larger than or equal to 2; the number of the modal measurement modules is three, and the modal measurement modules are respectively a pressure-sensitive measurement module, a temperature-sensitive measurement module and a frequency calibration measurement module. The pressure-sensitive measurement module is a capacitor and is used for responding to the stress change, and the capacitance value of the pressure-sensitive measurement module changes along with the stress; the capacitor comprises a voltage-sensitive capacitor and a bias capacitor which are connected in parallel; the problems of low integration degree caused by high harness redundancy and high system complexity caused by multiple measurement circuits of the existing multimode sensor array are solved.

A sensor system configured to provide an indication of a sensed parameter, the sensor system comprising: a reader comprising a reader antenna configured to transmit a carrier signal; a tag comprising: a tag antenna configured to receive the carrier signal; power harvesting circuitry coupled to the tag antenna and configured to produce an operating voltage from the receiver carrier signal; the voltage-controlled oscillator, VCO, circuitry coupled to the power harvesting circuitry and configured to receive the operating voltage therefrom, wherein the VCO circuitry comprises a VCO configured to generate an output signal having a frequency which varies based on the sensed parameter, and wherein the VCO circuitry is configured to modulate an impedance of the tag antenna according to a timing parameter selected based on the frequency of the output signal from the VCO; a controller coupled to the reader antenna and configured to: (i) identify an indication of the timing parameter of the impedance modulation of the tag antenna based on detected changes in the reader antenna impedance, and (ii) determine an indication of the sensed parameter based on the identified indication of the timing parameter.

The application belongs to the technical field of preparation and determination of aviation equipment absorbing material, and discloses a wide low-frequency sound absorption and vibration reduction covering layer structure and a design method. The design method comprises the following steps: by changing the geometric parameters of a single unit composed of an embedded neck hole diameter d, an embedded neck length l and a cavity wall plate height L, the strong non-local coupling between a plurality of embedded rubber Helmholtz resonators is changed, the impedance of the embedded rubber Helmholtz resonator is changed, and the overall structure of the wide low-frequency sound absorption and vibration reduction covering layer structure of the sound absorption metasurface array is obtained by the weak coupling resonance sound absorption mechanism; the embedded rubber Helmholtz resonator is composed of an embedded neck, a damping rubber coating layer and a sound absorption cavity. The non-local coupling between the plurality of embedded rubber Helmholtz resonators in the multi-element metasurface array is adjusted, effective broadband impedance modulation is realized, and strong dissipation of broadband sound energy is realized at very low frequency.

The present application provides a communication method and a communication apparatus. The method comprises: determining a first time domain symbol, wherein the first time domain symbol comprises N sub-symbols, first M sub-symbols among the N sub-symbols are null symbols, the sub-symbols following the first M sub-symbols among the N sub-symbols are periodically repeated sub-symbol sequences, and M and N are positive integers; and transmitting the first time domain symbol. On this basis, an impedance modulation transmitter can generate and transmit a first time domain symbol, and is compatible with an OFDM framework.

This application relates to an EEG signal transmission device and method based on event-driven backscattering. The device includes a neural signal input unit, an event triggering unit, an impedance modulation unit, and an antenna unit. The neural signal input unit acquires and outputs continuous analog EEG signals. The event triggering unit performs time integration on the continuous analog EEG signals and executes threshold decision to generate event pulses characterizing EEG events. The impedance modulation unit switches the load impedance state under the control of the event pulses. The antenna unit generates backscattered signals that change with the load impedance state switching under the action of an external radio frequency excitation signal. This application maps continuous neural electrical signals to event pulses and controls the load impedance switching in an event-driven manner, so that the antenna only participates in modulation when an event occurs. This achieves wireless transmission of neural information without analog-to-digital conversion and complex digital processing, significantly reducing the average power consumption of the system.

A plasma processing system is disclosed. A very high frequency (VHF) generator delivers power to a plasma chamber, and a mid-frequency (MF) generator delivers power to the plasma chamber. The VHF generator includes a sensor configured to provide a signal indicative of an impedance of a plasma load that is presented to the VHF generator. The VHF generator further includes a frequency tuner configured to adjust a frequency of the VHF generator within a cycle of the MF generator based on the signal to mitigate impedance modulation caused by the MF generator. Impedance modulation may also be mitigated by a sync line between the VHF and MF generators that allows presetting the VHF generator frequency in synchronization with a cycle of the MF generator.

The invention discloses a self-defined control method and system for a scattering surface of a phased-array antenna based on impedance modulation, and mainly solves the problem that the scattering characteristic of the phased-array antenna cannot be accurately controlled in the prior art. According to the implementation scheme, the method comprises the following steps: collecting a to-be-solved linear array antenna; calculating an array antenna mode item scattering field under any load by using each unit radiation field in the array, and calculating an array total scattering field and an antenna total scattering field RCS value according to the scattering field and the structure mode item scattering field; constructing a fitness function containing deviation between a target value and an actual scattering value, and iteratively optimizing non-uniform terminal impedance of an array antenna mode item scattering field; and the optimized terminal impedance value is utilized to change a load reflection matrix in an antenna mode item scattering field to modulate the antenna mode item scattering field so as to offset the structure mode scattering field, so that the total scattering field RCS reaches a specified target value, and the impedance is utilized to design an antenna array comprising an impedance matching network. The method can achieve the precise control of the scattering characteristics of the phased-array antenna, and can be used for the control of the radar cross section.

The application provides an impedance modulation device and a signal receiving method, and relates to the technical field of communication.The device comprises an antenna unit, a modulation load selection unit, and a modulation load selection circuit for selecting a load unit connected with the antenna unit from a first load unit and a second load unit; wherein the impedance of the antenna unit is Za, the impedance of the first load unit is Zc1, and the impedance of the second load unit Zc2 satisfies: 0<|(Г0 / |Г0|)+(Г1 / |Г1|)|<γ, wherein represents taking an absolute value, γ is a preset threshold value, Γ0=(Zc2‑Za * ) / (Zc2+Za * ), Γ1=(Zc1‑Za * ) / (Zc1+Za * ) and the symbol is a conjugate operator.The scheme of the application can realize modulation of a backscatter signal according to a digital signal when a carrier CW signal is received at a low cost, and can be applied in a passive Internet of Things device.

The application discloses a kind of real-time monitoring impedance electric stimulation system, belong to medical electronic technical field;The system includes signal generation module, signal multiplexing module, signal acquisition module, impedance extraction module, impedance calculation module and intelligent feedback control module;Signal generation module simultaneously generates treatment stimulation signal and frequency orthogonal impedance monitoring signal;Signal multiplexing module is combined after two kinds of signals and is applied to human body by electrode;Signal acquisition module acquires mixed signal containing physiological response and impedance information;Impedance extraction module accurately extracts impedance modulation component from mixed signal using digital lock-in amplification technology;Impedance calculation module calculates electrode-tissue contact impedance in real time;Intelligent feedback control module carries out multistage threshold judgment according to impedance value, realizes alarm, parameter adjustment and safety protection function;The application realizes the synchronization of treatment and monitoring, improves the safety and reliability of system, is applicable to various electric stimulation medical equipment.

The present invention relates to the technical field of acoustic-electric conversion. Disclosed are a loudspeaker and an electronic device. The loudspeaker comprises: a diaphragm structure, the diaphragm structure comprising a first diaphragm and a second diaphragm, the first diaphragm being used for driving air to vibrate so as to emit an initial sound wave, and the signal of the initial sound wave being modulated on the basis of a signal of an audible sound frequency band; and a cover plate structure, wherein the cover plate structure and the diaphragm structure defines a sound production cavity, sound outlet holes are formed in the cover plate structure, the sound outlet holes communicate the sound production cavity with the outside, the initial sound wave in the sound production cavity is transmitted to the outside through the sound outlet holes to form a sound signal, the second diaphragm and the cover plate structure form an acoustic environment impedance, and the acoustic environment impedance is used for modulating the initial sound wave to change the sound pressure of the sound signal. The loudspeaker and the electronic device provided by the present invention can perform modulation on the basis of acoustic environment impedance, so as to output a sound signal covering an audible sound frequency band.

The present invention discloses a low-frequency broadband sound-absorbing metamaterial structure and a rapid design method. The metamaterial structure includes an enclosure panel, a partition board, a wave-tuning channel, and a self-stabilizing multi-degree-of-freedom sound absorber. The enclosure panel is a cylindrical structure with an open top. The partition board is arranged inside the enclosure panel to form at least one acoustic channel inside the enclosure panel. The acoustic channel, together with the enclosure panel and the partition board, constitutes the wave-tuning channel. The self-stabilizing multi-degree-of-freedom sound absorber includes a self-stabilizing sound-absorbing medium and multi-degree-of-freedom wave-guiding holes. The self-stabilizing sound-absorbing medium is filled in the acoustic channel, and the multi-degree-of-freedom wave-guiding holes are arranged on the self-stabilizing sound-absorbing medium. The present invention is applied to the fields of new materials, new structures, and their design technologies for noise control. It not only has the advantages of low cost, high reliability, low-frequency broadband sound-absorbing performance, multi-degree-of-freedom impedance modulation, self-stabilization, and load-bearing capacity, but also has the advantages of simple design process, rapid and efficient, and wide application range, and can effectively solve the problem of low-frequency broadband high-efficiency sound absorption in the prior art.

The invention discloses an impedance modulation antenna and an antenna beam control method and device, relates to the technical field of communication, and is used for realizing the reconfigurability of the impedance modulation antenna. The impedance modulation antenna comprises an antenna array, and each antenna unit in the antenna array comprises a transistor and metal patches arranged on the two sides of the transistor; and the feed source is arranged on the antenna array. Therefore, the impedance of the antenna can be modulated by regulating and controlling the impedance of the transistors in the different antenna units of the antenna array, so that the reconfigurability of the antenna is realized.

The invention belongs to the field of nuclear magnetic resonance logging, and particularly relates to an excitation subsystem of an in-situ split-direction imaging nuclear magnetic logging system, which comprises a four-path wide load impedance change adaptability E-type single-tube power amplifier device, a wide load impedance change adaptability four-path lossless combiner, four bridge arms, a four-path single-tube power amplifier device and a four-path lossless combiner, each bridge arm is connected with one path of wide-load impedance change adaptability E-type single-tube power amplifier device and is matched with the impedance modulation ratio of the wide-load impedance change adaptability E-type single-tube power amplifier device, and four paths of output voltages are integrated; and the controller generates an out-phase gating signal according to the out-phase modulation angle, inputs the out-phase gating signal to a gating electrode of the four-path wide load impedance change adaptability E-type single-tube power amplifier device, and adjusts the phase of the output power of the four-path wide load impedance change adaptability E-type single-tube power amplifier device according to an out-phase modulation strategy. The circuit can adapt to different load impedance conditions, and strong power output based on combination is realized.

The application discloses a kind of for low frequency broadband high-efficiency sound absorption metamaterial unit and its superstructure module, and the metamaterial unit includes the metamaterial cavity enclosed by multiple blocks of wall and the acoustic waveguide channel being arranged in the metamaterial cavity, acoustic waveguide channel is provided with impedance high-efficiency modulation sound absorption body, impedance high-efficiency modulation sound absorption body includes high porosity sound absorption medium and impedance modulation channel.The introduction of impedance modulation channel can effectively change the acoustic characteristics of high porosity sound absorption medium, by changing the geometric configuration of impedance modulation channel, can be widely modulated acoustic impedance, while producing resonance absorption peak in low frequency band, so as to significantly improve the sound absorption performance in low frequency band.A plurality of metamaterial units with different low-frequency high-efficiency absorption performance are connected in parallel, and through the coupling effect between the metamaterial units, a metamaterial module with low-frequency broadband high-efficiency sound absorption and noise reduction performance can be formed, thereby realizing low-frequency broadband high-efficiency sound absorption performance.

This utility model discloses a millimeter-wave broadband impedance modulation power amplifier based on a bandpass structure, including a microwave composite board, signal input terminals VIN+ and VIN-, a first MOSFET 5XM1, a second MOSFET 5XM1, a first neutralizing capacitor CN, a second neutralizing capacitor CN, a first signal output terminal Vout-, and a second signal output terminal Vout+. The signal input terminals VIN+ and VIN- are electrically connected to the gates of the first MOSFET 5XM1 and the second MOSFET 5XM1, respectively. The two ends of the first neutralizing capacitor CN are electrically connected to the gate of the first MOSFET 5XM1 and the drain of the second MOSFET 5XM1. The two ends of the second neutralizing capacitor CN are electrically connected to the gate of the second MOSFET 5XM1 and the drain of the first MOSFET 5XM1. The first signal output terminal Vout- is electrically connected to the drain of the first MOSFET 5XM1, and the second signal output terminal Vout+ is electrically connected to the drain of the second MOSFET 5XM1. The technical solution of this utility model can achieve the goals of Ku / Ka band relative bandwidth ≥15%, 6dB backoff efficiency ≥25%, and cost reduction of more than 30%.

The present disclosure belongs to the field of nuclear magnetic resonance logging, and particularly relates to an excitation subsystem of an in-situ directional imaging nuclear magnetic logging system, which comprises: four wide-load impedance change adaptive class-E single-tube power amplifier devices, a four-way lossless combining device, four bridge arms, each bridge arm being connected with one wide-load impedance change adaptive class-E single-tube power amplifier device, and the impedance modulation ratio of the wide-load impedance change adaptive class-E single-tube power amplifier device being matched with the voltage integration of four-way output; and a controller, which generates a heterophase gate signal according to a heterophase modulation angle, and inputs the heterophase gate signal to a gate electrode of the four wide-load impedance change adaptive class-E single-tube power amplifier devices to adjust the phase of the output power of the four wide-load impedance change adaptive class-E single-tube power amplifier devices according to a heterophase modulation strategy. The present disclosure can adapt to different load impedance conditions and realize strong power output based on combining.

The application relates to the technical field of radio frequency antennas, and discloses a radio frequency antenna parameter dynamic adjustment device and method based on environment sensing. The method comprises the following steps: deploying a passive backscatter tag in an antenna array in a 5G base station, and performing impedance modulation on the 5G base station to obtain a backscatter signal; performing orthogonal demodulation and analog-to-digital conversion on the backscatter signal to obtain a target baseband signal; detecting the target baseband signal to obtain an environment characteristic parameter, and storing the environment characteristic parameter to a time delay line memory for cyclic cache processing to obtain time sequence environment data; performing feedback control based on the time sequence environment data to obtain a complex beam weight value matrix, and adjusting beamforming parameters of the antenna array according to the complex beam weight value matrix; and the application realizes active detection of environment electromagnetic parameters through double-state impedance modulation, and realizes accurate beamforming parameter adjustment.

A system and method for hardware-interlocked identity succession utilize a hardware-rooted integrity sentinel and an analog audit engine to enforce state integrity in a 2 nm-class semiconductor. Voltage anomalies are detected via continuous-time monitoring using a differential propagation delay interferometer and an asynchronous glitch latch, and enforcement is applied by an analog impedance modulation network physically interposed on a processor signature-enable line. A vertical-stack inductive gradient sensor integrated within a BSPDN stack detects backside tamper via mutual inductance changes. An analog memristive crossbar audit engine performs stochastic challenge-response scoring, and a thermal-security via lattice stabilizes the audit engine while also providing a parallel discharge path for termination. Identity transfer is controlled by a hardware-interlocked state machine with a deadman timer that triggers zeroization absent a physical acknowledgment signal.

The application discloses a liquid cooling data center heat dissipation intelligent regulation and control method based on dynamic flow regulation, relates to the field of data center thermal management, and comprises the following steps: acquiring CPU power change data and temperature distribution data in real time; acquiring initialization flow parameters of each cooling branch; adapting and adjusting the initialization flow parameters to the temperature distribution data to generate a first group of adaptive hydraulic impedance; performing power jump prediction according to the CPU power change data, and adapting the first group of adaptive hydraulic impedance to the temperature distribution data as a starting point according to the jump prediction information to generate a second group of adaptive hydraulic impedance; and generating a digital control instruction through an impedance modulator, and issuing the digital control instruction to the opening degree of a digital potentiometer control electromagnetic flow valve of each cooling branch through a digital potentiometer control interface. The application solves the technical problem that the existing heat dissipation regulation and control cannot dynamically adjust the cooling flow according to the actual operation state of a server, and achieves the technical effect of adjusting the cooling flow in real time according to the heat dissipation demand.

A surface-powered and impedance-modulated telemetry system permits data from downhole to be telemetered to the surface from within a borehole by using a surface power source to provide a known, controlled, value (V or I) of an electrical signal. The electrical signal completes an electrical circuit through some portion of the downhole components, a surface conductor, and the formation. The downhole components are in contact with the formation and include an impedance-variation system to controllably vary the impedance of those components to encode desired data using a switch system control the impedance of the electrical connection of the upper components to the lower components. At the surface, a measured value of the circuit value (I or V), which depends upon that varying impedance, is acquired. The data encoded in the varying impedance is decoded using that controlled value and the measured value to form a signal.

The invention discloses a multichannel temperature sensor synchronous acquisition system and method for a meteorological metering system, and particularly relates to the technical field of meteorological metering and precise temperature measurement. The problem that in-phase system errors are generated due to the fact that a shared reference voltage source is modulated by common impedance due to synchronous and rapid change of sensor signals is solved; the method comprises the following steps: synchronously acquiring digital signals of multiple temperature sensors, monitoring output noise signals of a shared reference voltage source, analyzing high-frequency energy mutation of the noise signals to identify a current synchronization event, extracting reference disturbance characteristics corresponding to the event, performing spatial mode decomposition on the sensor signals during the event, performing spectral analysis on the reference disturbance, and obtaining a reference disturbance characteristic; and constructing a modal spectrum projection matrix associated with the two modes, calculating the error compensation amount of each path of sensor signal, and finally applying the compensation amount to the original data to obtain accurately compensated temperature data so as to realize effective suppression of the dynamic common-mode error.

The invention belongs to the technical field of wireless communication, and particularly relates to a compact Doherty power amplifier based on a transformer. The power amplifier comprises a transistor-level active part and a passive network part, the active part adopts a differential band neutralization capacitor structure, and the output stage of the active part is realized by adopting a power amplifier with a multi-tube stacking structure; the passive network part utilizes two groups of three-coil transformers to respectively realize input power, phase dual distribution and output Doherty load impedance modulation. Compared with a traditional Doherty power amplifier, the Doherty power amplifier has the advantages that a single driving stage is adopted for driving, power distribution and stage matching are fused for simultaneous output matching of a group of three-coil transformers, impedance conversion of a quarter-wavelength transmission line or a plurality of transformers is not needed, and only the area of a single transformer is occupied. According to the invention, the area is compact, high efficiency can be maintained in a large output power range of 0-8.5 dB and the like, and the requirements of low cost and high efficiency of wireless communication applications such as 5G / 6G / Wi-Fi and the like are met.

The invention discloses a liquid cooling data center heat dissipation intelligent regulation and control method based on dynamic flow regulation and control, and relates to the related field of data center heat management, and the method comprises the steps: obtaining CPU power change data and temperature distribution data in real time; acquiring an initialized flow parameter of each cooling branch; adaptive adjustment is conducted on the initialized flow parameters according to the temperature distribution data, and a first set of adaptive hydraulic impedance is generated; performing power jump prediction according to the CPU power change data, performing adaptation on the first group of adaptive hydraulic impedances according to jump prediction information by taking the temperature distribution data as a starting point, and generating a second group of adaptive hydraulic impedances; a digital control instruction is generated through the impedance modulator, and the digital control instruction is issued to the digital potentiometers of the cooling branches through the digital potentiometer control interface to control the opening degree of the electromagnetic flow valves. The technical problem that the cooling flow cannot be dynamically adjusted according to the actual operation state of the server in existing heat dissipation regulation and control is solved, and the technical effect of adjusting the cooling flow in real time according to the heat dissipation requirement is achieved.

The embodiment of the invention provides a power amplifier and a chip, the power amplifier comprises a first signal input end, a second signal input end, a first amplification link, a second amplification link and a target output end, the first amplification link comprises a first driving stage amplifier, at least one second driving stage amplifier and a first final stage amplifier; wherein the first driving stage amplifier and the at least one second driving stage amplifier are arranged in parallel. According to the implementation of the invention, the main driving branch and the auxiliary driving branch can work cooperatively, only the main branch is conducted to maintain high efficiency at low power, the auxiliary branch is started at high power, and the final-stage driving capability is enhanced through impedance modulation, so that the efficiency and the output power of a backoff point are remarkably improved.

The invention belongs to the technical field of reconfigurable antennas, and particularly relates to a reconfigurable antenna based on a holographic tensor impedance modulation metasurface, and an array unit is of a five-layer structure which sequentially comprises a top layer metal patch, an upper layer medium, a metal grounding layer, a lower layer medium and a bottom layer direct current feed layer. Eight variable capacitance diodes are loaded on the top metal patch at equal intervals, and real-time regulation and control of unit tensor impedance characteristics are achieved by applying different bias voltages to the diodes. The central octagonal patch is grounded, and the fan-shaped patches are connected with the direct current layer through the metalized via holes so as to feed the diode. The array is composed of 21 * 21 units, the tensor impedance characteristic distribution of the array is calculated according to a target radiation field, then the on-off condition of each diode of the array is controlled, the design can realize real-time regulation and control on the beam propagation direction and the polarization characteristic, the production cost is greatly reduced, and the array has a wider application scene.