50 results about "Broadband power amplifier" patented technology

The invention discloses a broadband power amplifier with an output reconfigurable network, and relates to the technical field of microelectronics, the broadband power amplifier with the output reconfigurable network adopts a three-stage amplification circuit with a gate width ratio of 1: 2: 8, and signal pre-amplification and gain improvement are realized through the first two stages of amplifiers; the last-stage eight-tracheid parallel structure outputs saturated power under high-voltage power supply and realizes power additional efficiency; the output reconfigurable network is controlled by a first switch and a second switch, the first switch is turned off and the second switch is turned on in a high-power mode, so that a compensation microstrip line is grounded to form a fundamental wave matching branch knot, the loss of a harmonic suppression network is avoided, and high-efficiency output is guaranteed; in a low-power mode, the first switch is switched on, the second switch is switched off, the first LC resonance unit and the second LC resonance unit jointly form a band-stop filtering network, secondary and third harmonic impedance is adjusted to be in a near-short-circuit state, so that generation of higher harmonics is restrained, phase distortion is offset through the compensation microstrip line, and the integrity of fundamental wave signals is maintained.

A broadband Doherty power amplifier is provided, which includes a power divider, a carrier power amplifier circuit, a peak power amplifier circuit, and a load modulation network. The carrier power amplifier circuit includes a carrier input matching circuit, a carrier power amplifier, and a carrier output matching circuit. The peak power amplifier circuit includes a peak input matching circuit, a peak power amplifier and a peak output matching circuit. A resistance value of a system load is ZL. An output impedance of the carrier output matching circuit is Zm and meets Zm=ZL(n+1). An output impedance of the peak output matching circuit is Zp and meets Zp=ZL(n+1) / n. The load modulation network is configured to set an impedance of a combination point to be ZQ, whose resistance value is ZL. A method of implementing a broadband Doherty power amplifier is further provided.

The embodiment of the invention provides a gallium nitride device, a preparation method and a chip. The gallium nitride device comprises an epitaxial layer, a source electrode, a drain electrode and a grid electrode, the drain electrode and the epitaxial layer form Schottky contact and ohmic contact distributed at intervals in an array mode, the electric field distribution on one side of the drain electrode is improved, the output capacitance of the gallium nitride device is reduced, the breakdown voltage and the frequency gain characteristic of the gallium nitride device are improved, and therefore the gallium nitride device is suitable for a broadband power amplifier and a higher frequency range. The problem that a scheme for improving the breakdown voltage of a device from the perspective of reducing electric leakage or modulating electric field distribution in the prior art is not suitable for a communication system of a high-frequency end is solved.

The invention discloses a broadband power amplifier detection circuit and method based on the resistance voltage division technology, and relates to the technical field of radio frequency signal detection, the detection circuit comprises a broadband power amplifier circuit, a resistance voltage division detection circuit and a digital interface board which are connected in sequence, the broadband power amplifier circuit is used for carrying out power amplification on an input radio frequency signal and outputting the amplified radio frequency signal, and the resistance voltage division detection circuit is used for outputting the amplified radio frequency signal. The resistance voltage-dividing detection circuit is used for carrying out voltage division on the amplified radio-frequency signal to obtain a detection signal and adjusting the size of the detection signal, and the digital interface board is used for comparing the voltage of the detection signal with a preset threshold value to obtain the fault condition of the broadband power amplifier circuit. The problem of in-band unevenness of detection in a traditional microstrip coupling mode is solved through the resistance voltage division detection technology, the in-band unevenness of traditional microstrip coupling detection is about 20 dB, the in-band unevenness of the detection method is only 2 dB, the in-band unevenness of a broadband power amplifier detection circuit is greatly improved, the false alarm rate of radio frequency detection is reduced, and the detection efficiency is improved. Therefore, the accuracy of power detection is improved.

The invention provides a waveform agility high-power microwave generation system based on time reversal and a working method. The system comprises a computer, an arbitrary waveform generator, a first broadband power amplifier, m second broadband power amplifiers, a first time reversal pulse compression cavity, m second time reversal pulse compression cavities, a power divider, a high-speed sampling oscilloscope, m phase shifters, m directional couplers and m radiation antennas. The computer is connected with the arbitrary waveform generator, the high-speed sampling oscilloscope, the phase shifter and the directional coupler; the arbitrary waveform generator is connected with the high-speed sampling oscilloscope through the first time reversal pulse compression cavity on one hand, and is connected with an input port of the power divider through the first broadband power amplifier on the other hand. And m output ports of the power divider are sequentially connected with the radiating antenna through the corresponding second broadband power amplifier, the second time reversal pulse compression cavity, the phase shifter, the directional coupler and the radiating antenna. According to the invention, high-universality broadband internal waveform agility high-power microwave pulse generation can be realized.

The invention relates to a transmission and reception device with a broadband HF power amplifier, in particular an N-way Doherty amplifier with active load modulation. The object of the invention is to provide a high-power transmission and reception device suitable for high-power and broadband applications and having a transmission power of more than 10 Watts to approximately 2000 Watts by means of appropriate design measures in combination with electronic components, starting from a transmission and reception device with a module (GSZ) having a configurable HF high-power amplifier (HPA) that operates between and below two power back-off points and comprises a main power amplifier (DM) with an amplifier core and at least one peak power amplifier (DP1) with an amplifier core, wherein a digital input signal distributor (ET) is provided, which is connected to the input of the main power amplifier (DM) and to the input of the at least one peak power amplifier (DP1) and has a plurality of outputs, and an output combiner connected to the output of the amplifier core of the main power amplifier and the output of the at least one peak power amplifier is provided. This object is achieved according to the invention, in which an additional multiharmonic transformation line (LAH) is provided at the amplifier core output of a main power amplifier (DM) and at the amplifier core output of at least one peak power amplifier (DP1) and a circulator (Z1) connected to the output of an impedance converter (AN1) or an output combiner (C). By means of the circulator (Z1), the upstream main power amplifier (DM) and at least one peak power amplifier (DP1) are protected from overvoltage and overcurrent on the output side, because the circulator (Z1) transfers energy to a collecting resistor (W1) connected to the circulator (Z1). The invention belongs to the field of broadband amplifiers, in particular broadband Doherty amplifier circuits.

The present invention provides a high-speed multi-level quantum phase drive circuit based on radio frequency transistors, comprising a random signal generator, a plurality of high-speed level converters respectively connected to the output ends of the random signal generator, and a plurality of radio frequency transistors and their resistor network units respectively connected to the output ends of the high-speed level converters; the random signal generator generates a random coding signal according to random coding logic, the random coding signal is transmitted to the high-speed level converter, and the high-speed level converter converts the random coding signal into a low-voltage positive emitter coupled logic level. The low-voltage positive emitter coupled logic level drives the corresponding radio frequency transistor to conduct, and the radio frequency transistor outputs a level of corresponding amplitude. At any time, only one radio frequency transistor is conducted. The advantages of the present invention are: the power amplification of the level signal is achieved by using the parallel connection of radio frequency transistors instead of a broadband power amplifier, which simplifies the design difficulty of the quantum phase drive circuit and greatly reduces the cost.

A broadband Doherty power amplifier is disclosed. A Doherty power amplifier includes a main power amplifier and a peaking amplifier. In contrast to conventional approaches that combine outputs from the main and peaking amplifiers before an impedance transformation circuit, the Doherty power amplifier combines the outputs after an impedance transformation circuit in the peaking amplifier output path. This eliminates, or at least reduces, a possible impedance step down and corresponding impedance step up for the main output path. Reduction or elimination of such a step down and step up reduces insertion loss and allows increased efficiency at the first efficiency peak, as well as improving the fractional bandwidth of the Doherty power amplifier.

The invention belongs to the field of broadband power amplifiers, and particularly relates to a broadband impedance converter. The circuit comprises an input impedance converter, an input matching unit, a driving power amplifier, an inter-stage matching unit, a final-stage power amplifier and an output impedance converter. According to the invention, based on the HBT technology, coupling among multiple layers of metal is utilized, so that an ultra-wideband impedance converter is realized; the broadband impedance transformer can provide a required load line for the power amplifier in a very wide frequency band range; the broadband impedance converter can simplify the input matching of the ultra-wideband power amplifier and reduce the design complexity. Based on the impedance transformer and the ultra-wideband power amplifier structure, the designed wideband amplifier is high in bandwidth, high in efficiency, simple in design and small in area.

A method for operating a plasma processing system includes determining a first frequency for powering a first plasma within a plasma processing chamber. The method includes generating, at a broadband power amplifier, a first amplified RF signal having the first frequency. The method includes supplying the first amplified RF signal to process a substrate arranged in the plasma processing chamber using a first plasma process including the first plasma. The method includes determining a second frequency for powering a second plasma within the plasma processing chamber. The method includes generating, at the broadband power amplifier, a second amplified RF signal having the second frequency. The method includes supplying the second amplified RF signal to process the substrate arranged in the plasma processing chamber using a second plasma process including the second plasma.

The invention discloses a broadband power amplifier based on transformer coupling, and relates to the technical field of radio frequency integrated circuits, and a matching network based on transformer coupling effectively expands the working bandwidth of the power amplifier. The broadband power amplifier adopts a two-stage structure, the two stages adopt pseudo-differential cascode structures, a driving stage adopts a neutralizing capacitance technology to improve the circuit stability, and a power stage adopts a thick-gate transistor to improve the gain; input matching adopts a mode that a common-source gate inductor is respectively coupled with a common-gate and common-source inter-stage inductor and a common-source parallel inductor, and inter-stage and output broadband matching is realized through a magnetic coupling resonant cavity structure, so that the broadband high-gain performance of the power amplifier is realized.

The utility model relates to a power amplifier assembly, in particular to a miniaturized split type two-way broadband power amplifier assembly, which comprises an aluminum shell, a power division module shell, two power amplifier module shells and a power supply control device are fixed in an inner cavity of the aluminum shell, a power distribution module is fixed in the power division module shell, a first cover plate is fixed on the power division module shell, and a second cover plate is fixed on the power division module shell. A power amplification module is fixed in the power amplification module shell, a second cover plate is fixed on the power amplification module shell, a third cover plate is fixed above the second cover plate on the power amplification module shell, and a fourth cover plate is fixed above the first cover plate and the third cover plate on the aluminum shell; according to the technical scheme provided by the utility model, the defects that the size is large, the weight is heavy and the power amplification module is inconvenient to replace in the prior art can be effectively overcome.

The present invention discloses a high-efficiency broadband power amplifier and a radio frequency transceiver, which include an input port, a broadband input matching circuit, an input broadband DC bias circuit, a power amplification transistor, an output broadband DC bias circuit, a low-pass filter network, an auxiliary matching transmission line and an output load; one end of the input port is connected to one end of the broadband input matching circuit, and the other end thereof is connected to the gate of the power amplification transistor. The drain of the power amplification transistor is respectively connected to one end of the output broadband DC bias circuit and the low-pass filter network. The other end of the low-pass filter network, the auxiliary matching transmission line and the output load are connected in sequence. The input broadband DC bias circuit is connected to the broadband input matching circuit, and the source of the power amplification transistor is grounded. The present invention can operate within a very wide frequency band range, adapt to various communication frequency bands, and has various performances such as small size and high efficiency, and is applicable to many radio frequency systems.

The invention discloses a broadband power amplifier based on a distributed Balun structure, which comprises an input matching network, a first-stage amplifier, an inter-stage matching network, a second-stage amplifier and a distributed Balun parallel transmission line structure which are connected in sequence, the function of converting differential signals into single-end signals and optimal load matching are achieved through a distributed Balun parallel transmission line structure, the amplifier can achieve broadband load matching and good output power and efficiency in a high-frequency band, meanwhile, parallel transmission lines are additionally introduced, and the overcurrent capacity of an output matching network is improved.

The utility model relates to the technical field of broadcast transmitters, and provides a filtering structure for improving the output power of a broadband power amplifier, which comprises a radio frequency input module used for receiving radio frequency signals from a signal source; the broadband power amplification module is used for performing power amplification on the radio frequency signal; the output end of the power amplifier matching module is connected with the input end of the filtering module, and the power amplifier matching module is used for optimizing impedance matching between the broadband power amplifier module and the filtering module; the output end of the filtering module is connected with the input end of the radio frequency output module, and the filtering module is used for improving output power and signal quality; and the output end of the radio frequency output module is connected with an external load, and the radio frequency output module is used for outputting the filtered radio frequency signal to the external load. Therefore, the problems that an existing low-pass filter is poor in harmonic linearity, a power amplifier tube cannot meet the requirement for full-band stable work, and consequently power of a system cannot be stably output in the full band are solved.

A broadband Doherty power amplifier is disclosed. The Doherty power amplifier includes a main power amplifier and a peak amplifier. Compared to the conventional method of combining the outputs of the main and peak amplifiers before an impedance transformation circuit, this Doherty power amplifier combines the outputs after an impedance transformation circuit in the peak amplifier output path. This eliminates or at least reduces the possible impedance step drop and corresponding impedance step rise for the main output path. This reduction or elimination of the step drop and rise reduces insertion loss and allows for increased efficiency at the first efficiency peak, thus improving the fractional bandwidth of the Doherty power amplifier.

The invention discloses an efficient broadband power amplifier combining parasitic compensation and harmonic control technologies, which comprises an input matching network, a grid bias network, a parallel resonance stabilization network, a field effect transistor, a parasitic compensation network, a harmonic control network, a drain bias network and an output matching network, the design of an input and output matching network is realized by adopting a step type matching structure, the circuit bandwidth is expanded, the output efficiency of the power amplifier is improved by designing a parasitic compensation network, meanwhile, a harmonic control network is designed, and second and third harmonics of the power amplifier are suppressed by utilizing the harmonic control network, so that after being tuned by the harmonic network, a radio-frequency signal is transmitted to the power amplifier. The second harmonic power and the third harmonic power are obviously reduced, so that the harmonic power is converted into fundamental power, the output power is increased, the output efficiency is improved, the circuit structure enables the power amplifier to obtain high-efficiency and high-power capabilities in a broadband, and the circuit structure can be popularized and applied to a 5G wireless communication system.

The utility model relates to the field of radio frequency amplification, and discloses an all-solid-state short-wave broadband power amplifier, which comprises a controller, broadband power modules, a three-way distributor and a three-way synthesizer, the three-way distributor, the three broadband power modules and the three-way synthesizer are connected in sequence, the controller is connected with the broadband power modules and a directional coupler, and the directional coupler is connected with the controller. The input port of the three-way distributor is connected with an input signal. According to the utility model, the input signals are distributed and synthesized, and then are dynamically adjusted through the controller, so that the effects of realizing full-band coverage and guaranteeing the quality of full-band signals without connecting a plurality of traditional narrow-band devices in parallel are achieved, and the requirements of the fields of short-wave communication and the like on broadband high-power signals are met.

A wideband power amplifier (PA) linearization technique is proposed. A current interpolation technique is proposed to linearize power amplifiers over a wide bandwidth. The wideband power amplifier linearization technique employs a novel transconductance Gm linearizer using a current interpolation technique that achieves improvement in the third order intermodulation over wide bandwidth for a sub-micron CMOS differential power amplifier. By using a small amount of compensating bias into an opposite phase differential pair, linearization over wide bandwidth is achieved and can be optimized by adjusting the compensating bias.

The invention discloses a small-sized integrated broadband power amplifier circuit, an amplifier device and a fault detection method, which are applied to the technical field of microwave power amplifiers and aim to solve the problem that in the prior art, a broadband power amplifier module, a power supply module and a heat dissipation device are generally designed respectively. In the field use process, the system is spliced through a connecting line or a transition plate, the size is large, the cost is high, the power consumption is large, the debugging amount is large, the transfer process is inconvenient, meanwhile, when a fault occurs, a fault part cannot be quickly positioned, and personnel have the risk of radiation when troubleshooting the fault for a long time. According to the invention, through a radio frequency link series circuit, the pushing stage module and the amplification stage module are connected in series and automatically spliced under the extremely small size, so that the optimal connection of the two power amplification circuits is ensured; and power, temperature, voltage and user information are monitored through an internal control center, so that the stability and reliability of the system are improved, and the debugging and maintenance difficulty is reduced.

The application discloses a broadband microwave solid-state power amplifier design method based on a reconfigurable matching network, and belongs to the technical field of microwave power amplifier design. The method acquires transistor model parameters and a target working frequency band, constructs an initial topology of a reconfigurable matching network containing tunable element nodes and switch switching paths, performs discretization sampling on the target frequency band to obtain a plurality of key frequency points, dynamically adjusts element values and switch on-off states for each key frequency point through an iterative search algorithm to generate a corresponding power matching parameter set, compares the power matching parameter sets of adjacent key frequency points in terms of difference degree, identifies parameter jump intervals with a difference degree exceeding a tolerance threshold, positions mismatch element nodes according to the parameter jump intervals, performs a switch path reconstruction operation, and generates a broadband matching parameter sequence. The application can effectively solve the performance deterioration problem of a broadband power amplifier matching network caused by parameter mutation when working across frequency bands.

The invention provides a harmonic filter integrated in an ultra-short wave power amplifier in a matching manner by using a load traction technology, which comprises the following steps: setting different frequency points for a broadband power amplifier, and determining target impedance values corresponding to the different frequency points based on a preset test condition by combining the load traction technology; determining an input impedance network of the harmonic filter corresponding to the target impedance value according to the target impedance value, and matching an output transmission line corresponding to the input impedance network through impedance conversion by adopting a multi-order elliptical low-pass network model; an elliptical low-pass model is arranged in the harmonic filter, and a transmission zero point is generated through parallel resonance to suppress harmonic waves. According to the method disclosed by the invention, a module cascade matching joint debugging link can be omitted to the greatest extent, functional indexes of the module assembly are correspondingly improved, the volume space is saved, the integrated design is realized, the application, installation and operation are simple and convenient, and the performance is stable and reliable.

This utility model relates to the field of radio frequency communication technology and discloses a multi-band broadband power amplifier module, including a single-chip module, a thermal management module, and a power management module. The single-chip module integrates a dynamic broadband matching module, a multi-stage push-pull amplification module, and a digital predistortion correction module. The output terminal of the dynamic broadband matching module is electrically connected to the input terminal of the multi-stage push-pull amplification module, and the output terminal of the multi-stage push-pull amplification module is electrically connected to the input terminal of the digital predistortion correction module. The output terminal of the digital predistortion correction module is electrically connected to the input terminal of the dynamic broadband matching module. The single-chip module is bidirectionally electrically connected to the thermal management module. In this utility model, by adopting an integrated design, the dynamic broadband matching module, the multi-stage push-pull amplification module, and the digital predistortion correction module are integrated onto a single chip, significantly reducing the overall size, lowering production costs, and improving power amplification efficiency.

The invention discloses a limited water area transfer function response low-frequency broadband measurement method and system. The measurement method comprises the following steps: firstly, constructing a broadband frequency modulation signal in a negative number time domain, expanding a transfer function system formed by a transmitting transducer and a hydrophone to a negative frequency domain according to a relation between time and frequency, and then processing frequency response of a transfer function by utilizing prior information of the frequency response of the transfer function and combining a signal processing technology. And obtaining a transfer function under a free field condition. The measuring system comprises a control system, a low-frequency transmitting transducer, a hydrophone, an arbitrary function transmitter, a broadband power amplifier, a current sampler, a filter and the like. The time signal is constructed in the negative time domain, and the measurement frequency of the limited water area transfer function is expanded to the low frequency band by combining the prior information of the underwater acoustic parameters of the transmitting transducer and the hydrophone, so that the measurement of the lowest 1Hz low-frequency transfer function can be realized, and the method can be well applied to the measurement of the underwater electroacoustic parameters of the transducer and the hydrophone.

The invention provides a broadband Doherty power amplifier with an adaptive phase shift structure, and belongs to the technical field of power amplifiers. In order to cope with the phase mismatch problem, a self-adaptive phase shift structure is introduced and is arranged in front of an auxiliary driving amplifier unit, and nonlinear phase shift is superposed on an input signal of the auxiliary driving amplifier unit; meanwhile, the overall efficiency and linearity are prevented from being affected by insertion loss. In a broadband scene, the adaptive phase shift structure can reconstruct a phase curve in real time according to a power state of an input signal, dynamically adjust phase synthesis of a main path and an auxiliary path of the Doherty power amplifier, and ensure phase alignment and active regulation and control of load impedance in a frequency band, so that the overall efficiency of the Doherty power amplifier under the broadband is effectively improved. Moreover, the adaptive phase shift structure provides an on-chip adjustable scheme, so that the dependence on external elements is reduced, and the system complexity and the manufacturing cost are reduced.

This invention provides an ultra-wideband Doherty power amplifier system and control method, comprising a control layer, a physical layer, and an optimization layer. The physical layer employs three parallel gallium nitride high electron mobility transistors, combined with a broadband collaborative synthesis network of a multilayer PCB planar transformer synthesizer with a leakage inductance resonant parasitic absorption mechanism, to achieve bandwidth expansion. The optimization layer introduces an improved MOEA / D algorithm with group delay flatness constraints. The control layer uses an FPGA-embedded model to assist in iterative learning and control of the ILC unit. This invention effectively solves the nonlinear divergence problem caused by strong physical-control coupling in a three-channel amplifier module architecture within the ultra-wideband range, simultaneously achieving high back-off efficiency and fast, stable convergence of the digital predistortion algorithm in the 0.6–4.9 GHz frequency band.

The invention provides a rapid detection device and method for evaluating the fatigue life of an aluminum alloy welding seam, and relates to the technical field of fatigue detection.The device comprises an ultrasonic excitation and acquisition module, a signal processing module and a signal processing module, the ultrasonic transducer is configured to inject a group of high-energy and continuous-frequency-sweeping ultrasonic excitation signals into a welding seam; the receiver and the high-frequency piezoelectric probe are integrated, and the receiver is used for synchronously collecting a first ultrasonic response signal modulated by micro damage in the welding seam; the feature extraction module is configured to demodulate a high-order harmonic component caused by material fatigue damage from the first ultrasonic response signal; the relative energy ratio of the high-order harmonic component to the fundamental component is calculated, and a nonlinear resonance spectrum distortion factor is generated; a first fatigue damage physical model is embedded in the service life evaluation module, and the service life evaluation module is configured to calculate and output the first residual fatigue service life of the to-be-detected aluminum alloy welding seam by taking the nonlinear resonance spectrum distortion factor as an input parameter.

The invention discloses a millimeter wave broadband power amplifier and communication system based on transconductance enhancement stacked common-gate input. The millimeter wave broadband power amplifier and communication system comprises an input matching circuit which is composed of an input transformer, a first capacitor and a second capacitor, wherein the first capacitor and the second capacitor are connected to the primary side and the secondary side of the input transformer in parallel; the output matching network is composed of an output transformer, an eleventh capacitor and a twelfth capacitor, wherein the eleventh capacitor and the twelfth capacitor are connected in parallel. The inter-stage matching network is composed of an inter-stage transformer, a seventh capacitor, an eighth capacitor and a fourth resistor, wherein the seventh capacitor and the eighth capacitor are connected to the primary stage and the secondary stage of the inter-stage transformer in parallel. A secondary coil of the input matching network is connected with an input end of the first amplifier, an output end of the first amplifier is connected with a primary coil of the inter-stage matching network, a secondary coil of the inter-stage matching network is connected with an input end of the second amplifier, and an output end of the second amplifier is connected with a primary coil of the output matching network; the first amplifier adopts a transconductance-enhanced stacked common-gate architecture, and the second amplifier adopts a common-source architecture with a cross-coupling capacitor.

The invention discloses a high-linearity millimeter wave broadband power amplifier based on a cross cold field effect transistor pair, which belongs to the technical field of wireless communication, and comprises a linearizer consisting of a self-adaptive double-voltage path biasing circuit and a cross cold field effect transistor pair, a driving stage module and a power stage module, an input matching network, an inter-stage matching network and an output matching network; the broadband OP1dB performance of the millimeter wave power amplifier can be improved by a linearizer technology combining a self-adaptive dual-voltage path biasing circuit and a cross cold field effect transistor pair and by adjusting the gain pole positions of an input matching network, an inter-stage matching network and an output matching network; and good broadband OP1dB performance can be realized in both small signal performance and large signal performance.

The application provides a rapid detection device and method for evaluating aluminum alloy weld fatigue life, and relates to the technical field of fatigue detection. The device comprises: an ultrasonic excitation and collection module, which comprises a broadband power amplifier and a high-frequency piezoelectric probe, is used for contacting an aluminum alloy weld to be detected, and is configured to inject a group of high-energy and continuously swept-frequency ultrasonic excitation signals into the weld; a receiver, which is integrally integrated with the high-frequency piezoelectric probe, is used for synchronously collecting a first ultrasonic response signal modulated by internal micro-damage of the weld; a feature extraction module is configured to demodulate a high-order harmonic component caused by material fatigue damage from the first ultrasonic response signal; the relative energy ratio of the high-order harmonic component and a fundamental wave component is calculated, a nonlinear resonance spectrum distortion factor is generated; and a life evaluation module, which is embedded with a first fatigue damage physical model, is configured to take the nonlinear resonance spectrum distortion factor as an input parameter, calculate and output a first residual fatigue life of the aluminum alloy weld to be detected.