CN114759934B - Method and device for expanding microwave signal source output channel - Google Patents

Abstract

The present invention provides a method for expanding the output channel of a microwave signal source. The parameter information of the intermediate frequency signal realizes the duplication of the intermediate frequency signal in the digital domain to obtain the intermediate frequency signal in the digital domain; and the frequency conversion of the intermediate frequency signal in the digital domain is restored to a target microwave signal highly consistent with the original microwave signal, and Controlling multiple channels to output the target microwave signal synchronously. At the same time, it also provides a microwave signal source output channel expansion device, which can keep the frequency, amplitude and phase of the output signal of each expansion channel highly consistent with the received source signal; it solves the obvious phase existing in the expansion signal channel using traditional methods Bad question.

Description

Microwave signal source output channel expansion method and device

technical field

The invention relates to the technical field of microwave measurement control and superconducting quantum computing chip testing, in particular to a method and device for expanding the output channel of a microwave signal source with high consistency.

Background technique

Quantum computing is a new type of computing mode that follows the laws of quantum mechanics to regulate quantum information units for computing. The physical architecture of the quantum computing chip itself is multiple-input and multiple-output. During the chip testing process, multi-channel high-consistency signal sources are required as input. Commonly used signal sources generally only have 1 to 2 channels, which is far from meeting the test requirements; and there are obvious phase inconsistencies in the expansion of signal channels using traditional power division, and the phase difference is generally as high as ±7°~±10°, so use It is difficult to expand the output channel of the signal source by traditional power splitters to meet the requirements of quantum computing chip testing.

Contents of the invention

(1) Technical problems to be solved

Based on the above problems, the present invention provides a method and device for extending the output channel of a microwave signal source to alleviate technical problems such as obvious phase inconsistency in signal channel expansion using traditional power division in the prior art.

(2) Technical solution

One aspect of the present invention provides a method for expanding the output channel of a microwave signal source, including: performing down-conversion processing on the original microwave signal output by the signal source to be expanded through the channel to obtain an intermediate frequency signal; processing the intermediate frequency signal to obtain parameter information of the intermediate frequency signal; According to the parameter information of the intermediate frequency signal, the intermediate frequency signal is replicated in the digital domain to obtain the intermediate frequency signal in the digital domain; and the intermediate frequency signal in the digital domain is up-converted to restore the target microwave signal that is highly consistent with the original microwave signal, and the multi-channel synchronous output is controlled. target microwave signal.

According to the embodiment of the present invention, the down-conversion process is performed on the original microwave signal output by the channel to be expanded by the signal source to obtain the intermediate frequency signal, which includes: multiplying the original microwave signal by the local oscillator signal to obtain the first mixed frequency signal; The high mixing frequency components in the frequency signal are filtered out to obtain the intermediate frequency signal.

According to an embodiment of the present invention, processing the intermediate frequency signal to obtain the intermediate frequency signal parameter information includes: performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain a sampled signal; and performing vector decomposition on the sampled signal to obtain the intermediate frequency signal parameter information.

According to an embodiment of the present invention, the parameter information of the intermediate frequency signal includes: amplitude, frequency and phase.

According to the embodiment of the present invention, realizing the duplication of the IF signal in the digital domain according to the parameter information of the IF signal, and obtaining the IF signal in the digital domain includes: realizing the duplication of the IF signal in the digital domain by direct digital synthesis.

According to an embodiment of the present invention, the operation of direct digital synthesis includes: phase accumulation, phase amplitude conversion, and digital-to-analog conversion.

According to an embodiment of the present invention, the up-conversion of the intermediate frequency signal in the digital domain to recover the target microwave signal highly consistent with the original microwave signal includes: multiplying the intermediate frequency signal in the digital domain with the local oscillator signal to obtain a second mixed frequency signal; The high frequency mixing components in the second frequency mixing signal are filtered out to obtain the target microwave signal.

Another aspect of the present invention provides a microwave signal source output channel expansion device, including: a down-conversion module, a signal processing module, a DDS module, and an up-conversion module.

Wherein, the down-conversion module is connected with the signal source, and is used for down-converting the original microwave signal output by the signal source to be expanded to obtain an intermediate frequency signal;

The signal processing module is connected with the frequency down conversion module, and is used for processing the intermediate frequency signal to obtain the parameter information of the intermediate frequency signal;

The DDS module is connected with the signal processing module, and is used to realize the duplication of the intermediate frequency signal in the digital domain according to the parameter information of the intermediate frequency signal, and obtain the intermediate frequency signal in the digital domain; and

The up-conversion module is connected with the DDS module, and is used for up-converting the intermediate frequency signal in the digital domain to recover the target microwave signal highly consistent with the original microwave signal, and controlling the multi-channel synchronous output of the target microwave signal.

According to an embodiment of the present invention, the down-conversion module includes a first frequency mixing unit and a low-pass filter. Wherein, the first frequency mixing unit is used to multiply the original microwave signal and the local oscillator signal to obtain the first mixed frequency signal; the low-pass filter is connected to the first frequency mixed unit and is used to combine the High mixing frequency components are filtered out to obtain intermediate frequency signals.

According to an embodiment of the present invention, the signal processing module includes an ADC unit and an I/Q demodulation unit. Among them, the ADC unit is used for performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain the sampled signal; the I/Q demodulation unit is used for vector decomposition of the sampled signal to obtain parameter information of the intermediate frequency signal.

According to an embodiment of the present invention, the up-conversion module includes a second frequency mixing unit and a low-pass filter. Wherein, the second frequency mixing unit is used to multiply the digital domain intermediate frequency signal and the local oscillator signal to obtain the second frequency mixing signal; the low-pass filter is connected to the second frequency mixing unit and is used to multiply the second frequency mixing signal The high mixing frequency components are filtered out to obtain the target microwave signal.

(3) Beneficial effects

It can be seen from the above technical solutions that the microwave signal source output channel expansion method and device of the present invention have at least one or part of the following beneficial effects:

(1) The frequency, amplitude and phase of the output signal of each expansion channel can be highly consistent with the received source signal;

(2) Solve the obvious phase difference problem existing in the extended signal channel using the traditional method.

Description of drawings

Through the following description of the embodiments of the present invention with reference to the accompanying drawings, the above-mentioned and other objects, features and advantages of the present invention will be more clear, in the accompanying drawings:

FIG. 1 schematically shows a flow chart of a microwave signal source output channel expansion method according to an embodiment of the present invention;

Fig. 2 schematically shows a block diagram of a microwave signal source output channel expansion device according to an embodiment of the present invention;

Fig. 3 schematically shows a system block diagram of an electronic device suitable for implementing a method for extending an output channel of a microwave signal source according to an embodiment of the present invention.

[Description of main component symbols of the embodiment of the present invention in the accompanying drawings]

S110～S140-operation steps;

200-Microwave signal source output channel expansion device

210-down conversion module;

220-signal processing module;

230-DDS module;

240-up-conversion module;

301 - memory;

302 - processor;

303 - RF front end.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the invention. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features, steps, operations and/or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

All terms (including technical and scientific terms) used herein have the meaning commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have a meaning consistent with the context of this specification, and not be interpreted in an idealized or overly rigid manner.

Where expressions such as "at least one of A, B, and C, etc." are used, they should generally be interpreted as those skilled in the art would normally understand the expression (for example, "having A, B, and C A system of at least one of "shall include, but not be limited to, systems with A alone, B alone, C alone, A and B, A and C, B and C, and/or A, B, C, etc. ).

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The present invention provides a microwave signal source output channel expansion method and device. A certain output channel of the microwave signal source is set as the signal channel to be expanded, and the microwave signal output by the channel is down-converted by using the receiving channel of the radio frequency front-end down-conversion module. Processing, the source signal is converted to an intermediate frequency; ADC conversion and sampling are performed on the source signal down-converted to the intermediate frequency in the previous step, and after I/Q quadrature decomposition, the frequency, amplitude and phase information of the intermediate frequency signal is obtained; according to the previous step The frequency, amplitude and phase information of the intermediate frequency signal obtained in the step, adopts the direct digital synthesis (DDS) technology to generate the intermediate frequency signal again; the intermediate frequency signal is converted into an extended signal highly consistent with the source signal by the RF front end, and synchronized through multiple transmission channels Output the expanded microwave signal to achieve high consistency expansion of the original channel of the signal source. In the implementation process of the above extension method, the original signal output by the signal source can be output from multiple channels synchronously after down-conversion, ADC, sampling, I/Q quadrature demodulation, DDS, and up-conversion, thus realizing the signal source channel from One-to-multi-channel expansion to meet the needs of quantum computing chip testing; and the intermediate frequency signal of each expansion signal is synthesized from the frequency, amplitude and phase information of the source signal, and simultaneously transmitted by the same up-conversion signal synchronously, so each expansion The frequency, amplitude and phase of the channel output signal can be highly consistent with the received source signal, which solves the obvious phase difference problem existing in the extended signal channel using traditional methods.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

Fig. 1 schematically shows a flow chart of a method for extending an output channel of a microwave signal source according to an embodiment of the present invention.

As shown in FIG. 1 , the method for extending the output channel of the microwave signal source includes operations S110-S140.

In operation S110, down-convert the original microwave signal output by the signal source to be expanded through the channel to obtain an intermediate frequency signal;

According to an embodiment of the present invention, operation S110 includes:

multiplying the original microwave signal by the local oscillator signal to obtain a first mixed frequency signal;

Filter out high frequency mixing components in the first frequency mixing signal to obtain an intermediate frequency signal.

That is, the original microwave signal is subjected to down-conversion processing for subsequent digital-to-analog conversion and sampling.

For example, the original microwave signal frequency _fM of the output of a certain channel of the signal source to be expanded is 499.8MHz, and the frequency fLO of the local oscillator signal _LO is set to 499.8+31.2375(499.8/16)=531.0375MHz, where 16 is the minute Frequency, according to the principle of productization and difference, after the original microwave signal is multiplied by the local oscillator signal LO, the frequency components in the first mixed frequency signal include: the first low frequency mixed frequency component f _IF =f _LO -f _M , the first High mixing frequency product f _H = f _LO + f _M , then f _IF is: 531.0375-499.8 = 31.2375MHz, f _H is: 531.0375+499.8 = 1030.838MHz, utilize the low-pass filter to convert the first mixed frequency signal The frequency component of a high mixing frequency component f _H is filtered out, leaving the first low mixing frequency component of frequency f _IF to obtain an intermediate frequency signal, which realizes the down-conversion of the original microwave signal. The obtained 31.2375MHz intermediate frequency signal can be subjected to digital-to-analog conversion (ADC) and sampled in the next step.

In operation S120, the intermediate frequency signal is processed to obtain parameter information of the intermediate frequency signal.

According to an embodiment of the present invention, operation S120 includes:

performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain a sampled signal; and

The sampled signal is vector decomposed to obtain the parameter information of the intermediate frequency signal.

According to the embodiment of the present invention, the ADC is used to perform high-precision digital-to-analog conversion and sampling on the 31.2375 MHz intermediate frequency signal in operation S110.

The sampled signal is vector-decomposed, that is, decomposed into two components with the same frequency and the same peak amplitude but a phase difference of 90°. A sine signal (A*sinwt) and a cosine signal (A*coswt) are usually used to describe these two components, where the cosine component is called the in-phase component, that is, the I component; the sine component is called the quadrature component, that is, the Q component , then there are:

为中频信号的相位。In the formula, A is the amplitude of the intermediate frequency signal,

is the phase of the intermediate frequency signal.

Therefore, after sampling the intermediate frequency signal after ADC, after I/Q quadrature decomposition, and then calculating according to the above formula, the parameter information of the 31.2375MHz intermediate frequency signal can be obtained: frequency, amplitude and phase information.

In operation S130, the intermediate frequency signal is copied in the digital domain according to the parameter information of the intermediate frequency signal, and the intermediate frequency signal in the digital domain is obtained.

According to the embodiment of the present invention, the 31.2375 MHz IF signal in operation S120 is re-synthesized using Direct Digital Synthesizer (DDS) technology; the IF signal is replicated in the digital domain to obtain the IF signal in the digital domain. DDS is a digital electronic technology that can use a single (or mixed) frequency source to generate waveforms of arbitrary frequency, amplitude, and phase.

A complete DDS is mainly composed of three operations, including: phase accumulation, phase amplitude conversion and digital-to-analog conversion. Utilizing the property that the phase of the sine wave increases linearly, first divide a circle into 2N small parts on average, where N is the number of digits of the frequency tuning word, each of which has a corresponding amplitude on the lookup table. The frequency accumulator will accumulate a fixed value FTW (Frequency Tuning Word, frequency tuning word) every time a DDS working clock passes, which is equivalent to increasing the phase by 2π*FTW/2 ^N , so changing FTW is equivalent to changing the angular velocity. The phase-to-magnitude conversion obtains the magnitude value from the lookup table according to the value of the frequency accumulator, and the DAC restores the corresponding signal according to the magnitude value. Compared with other frequency synthesis methods, DDS technology has many advantages, including large bandwidth, fast frequency change speed, continuous output signal phase, high frequency resolution, programmable and fully digital, etc.

In operation S140, perform up-conversion on the digital-domain intermediate frequency signal to recover a target microwave signal that is highly consistent with the original microwave signal.

According to an embodiment of the present invention, operation S140 includes:

multiplying the intermediate frequency signal in the digital domain by the local oscillator signal to obtain a second mixed frequency signal; and

Filtering high frequency mixing components in the second frequency mixing signal to obtain a target microwave signal.

Specifically, the intermediate frequency signal in the digital domain output after operation S130 is multiplied by the local oscillator signal generated by the local oscillator, and then processed by a low-pass filter to obtain a frequency-converted high-frequency signal. For example, the frequency f _IF ′ of the digital domain intermediate frequency signal is 31.2375MHz, and the frequency f LO of the local oscillator signal _LO is 531.0375MHz. According to the product sum difference principle, the digital domain intermediate frequency signal is multiplied by the local oscillator signal LO to obtain the second mixing frequency The frequency components in the signal include: the second low-frequency mixing component f _M ′=f _LO −f _IF ′, the second high-frequency mixing component f _H ′=f _LO +f _IF ′, using a low-pass filter, the second The high mixing frequency component f _{H '} is filtered out, leaving the second low mixing frequency component with a frequency of f _M '=499.8MHz as the target microwave signal, which realizes the upconversion (upconversion) of the intermediate frequency signal, and restores the signal to the same The signal source is a highly consistent microwave signal in the channel to be expanded.

Afterwards, the RF front-end controls multiple transmit channels to synchronously output the up-converted target microwave signals, thereby realizing the expansion of signal source channels from one channel to multiple channels, because each channel of extended signals comes from the same frequency component f _M ′=499.8 MHz up-conversion signal, so this method can achieve high consistency of output signal amplitude and phase.

It should be noted that, unless the operations shown in the flowchart in the embodiment of the present invention clearly indicate that there is a sequence of execution between different operations, or that there is a sequence of execution of different operations in terms of technical implementation, otherwise, between multiple operations The order of execution can be in no particular order, and multiple operations can also be executed at the same time.

Fig. 2 schematically shows a block diagram of a microwave signal source output channel expansion device according to an embodiment of the present invention.

As shown in FIG. 2 , the microwave signal source output channel extension device 200 includes: a down-conversion module 210 , a signal processing module 220 , a DDS module 230 , and an up-conversion module 240 .

The down-conversion module 210 is connected to the signal source, and is used for down-converting the original microwave signal output by the signal source to be expanded to obtain an intermediate frequency signal;

According to an embodiment of the present invention, the frequency down conversion module 210 includes:

A first frequency mixing unit, configured to multiply the original microwave signal by a local oscillator signal to obtain a first frequency mixing signal; and

A low-pass filter, connected to the first frequency mixing unit, is used to filter out high frequency mixing components in the first frequency mixing signal to obtain an intermediate frequency signal.

A signal processing module 220, connected to the down-conversion module 210, for processing the intermediate frequency signal to obtain intermediate frequency signal parameter information;

According to an embodiment of the present invention, the signal processing module 220 includes:

an ADC unit, configured to perform digital-to-analog conversion on the intermediate frequency signal and perform sampling to obtain a sampling signal; and

The I/Q demodulation unit is used to vector-decompose the sampled signal to obtain parameter information of the intermediate frequency signal.

Specifically, the I/Q demodulation unit performs orthogonal vector decomposition on the sampled down-converted signal to completely obtain the parameter information of the intermediate frequency signal, including: amplitude, frequency and phase.

The DDS module 230 is connected to the signal processing module 220, and is used to realize the duplication of the intermediate frequency signal in the digital domain according to the parameter information of the intermediate frequency signal, and obtain the intermediate frequency signal in the digital domain;

The frequency up-conversion module 240 is connected to the DDS module 230, and is used for up-converting the intermediate frequency signal in the digital domain to recover a target microwave signal highly consistent with the original microwave signal, and controlling multiple channels to output the target microwave synchronously Signal.

The frequency up conversion module 240 includes:

The second frequency mixing unit is used to multiply the digital domain intermediate frequency signal and the local oscillator signal to obtain a second frequency mixing signal; and

A low-pass filter, connected to the second frequency mixing unit, is used to filter high frequency mixing components in the second frequency mixing signal to obtain a target microwave signal.

In this way, the signal source channel can be extended from one channel to multiple channels, so as to meet the requirements of quantum computing chip testing. Since the intermediate frequency signal of each extension signal is synthesized using the frequency, amplitude, and phase information of the source signal IF, and simultaneously transmitted by the same up-conversion signal, the frequency, amplitude, and phase information of the output signal of each extension channel and the source signal can be maintained. Highly consistent, solving the problem of obvious phase difference in the extended signal channel using traditional methods.

Fig. 3 schematically shows a system block diagram of an electronic device suitable for implementing a method for extending an output channel of a microwave signal source according to an embodiment of the present invention.

As shown in Figure 3, the electronic equipment system includes a memory 301, a processor 302 and a radio frequency front end 303, the memory 301, the processor 302 and the radio frequency front end 303 are electrically connected to each other directly or indirectly to realize data transmission or interaction . For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The memory 301 can be used to store software programs and modules, such as the program instructions/modules corresponding to the microwave signal source output channel expansion device provided in the embodiment of the present invention, and the processor 302 executes the software programs and modules stored in the memory 301, thereby executing Various functional applications and data processing. The radio frequency front end 303 can be used for down-converting the original signal of the signal source and up-converting the output signal.

Wherein, memory 301 can be but not limited to, random access memory (Random Access Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read-only memory (Programmable Read-OnlyMemory, PROM), erasable Read-only memory (Erasable Programmable Read-Only Memory, EPROM), Electric Erasable Programmable Read-Only Memory (EEPROM), etc.

The processor 102 may be an integrated circuit chip with signal processing capability. The processor 102 can be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (NetworkProcessor, NP), etc.; it can also be a digital signal processor (Digital Signal Processing, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

It can be understood that the structure shown in FIG. 3 is only for illustration, and the electronic device may also include more or less components than those shown in FIG. 3 , or have a configuration different from that shown in FIG. 3 . Each component shown in FIG. 3 may be implemented by hardware, software or a combination thereof.

To sum up, the embodiments of the present invention provide a method and device for extending the output channel of a microwave signal source with high consistency. In the method, a certain output of the microwave signal source is set as the signal channel to be expanded, and the receiving channel of the RF front-end down-conversion module is used to The microwave signal output by this channel is down-converted, and the source signal is converted to an intermediate frequency; ADC conversion and sampling are performed on the source signal that was down-converted to an intermediate frequency in the previous operation, and after I/Q quadrature decomposition, the intermediate frequency signal is obtained. Frequency, amplitude and phase information; according to the frequency, amplitude and phase information of the intermediate frequency signal obtained by the previous operation, the direct digital synthesis (DDS) technology is used to generate the intermediate frequency signal again; the intermediate frequency signal is up-converted by the RF front end to be highly consistent with the source signal The extended signal of the extended microwave signal is synchronously output through multiple transmission channels to realize the high consistency extension of the original channel of the signal source. In the implementation process of the above method, the original signal output by the signal source is down-converted through the proposed high-consistency expansion device for the output channel of the microwave signal source; ADC, sampling, and I/Q quadrature demodulation are realized; DDS is realized; Synchronously output from multiple channels, so as to realize the expansion of signal source channels from one channel to multiple channels, so as to meet the requirements of quantum computing chip testing. Since the intermediate frequency signal of each extension signal is synthesized by using the frequency, amplitude and phase information of the source signal IF, and simultaneously transmitted by the same up-conversion signal, the frequency, amplitude and phase information of the output signal of each extension channel can be maintained with the source signal. Highly consistent, solving the problem of obvious phase difference in the extended signal channel using traditional methods.

In the embodiments provided in the present invention, it should be understood that the disclosed devices and methods may also be implemented in other ways. The device embodiments described above are only illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functions and possible implementations of devices, methods and computer program products according to multiple embodiments of the present invention. operate. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified function or action , or may be implemented by a combination of dedicated hardware and computer instructions.

In addition, each functional module in each embodiment of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the operations of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A microwave signal source output channel expansion method, comprising: Down-convert the original microwave signal output by the signal source to be expanded to obtain an intermediate frequency signal; Processing the intermediate frequency signal to obtain intermediate frequency signal parameter information; wherein, the intermediate frequency signal parameter information includes: amplitude, frequency and phase; Realize the duplication of the intermediate frequency signal in the digital domain according to the parameter information of the intermediate frequency signal, and obtain the intermediate frequency signal in the digital domain; and Up-converting the intermediate frequency signal in the digital domain to restore it to a target microwave signal highly consistent with the original microwave signal, and controlling multiple channels to output the target microwave signal synchronously. 2. The microwave signal source output channel expansion method according to claim 1, the original microwave signal that the signal source is to be expanded channel output is carried out down-conversion processing, obtains intermediate frequency signal, comprises: multiplying the original microwave signal by a local oscillator signal to obtain a first mixed frequency signal; and Filter out high frequency mixing components in the first frequency mixing signal to obtain an intermediate frequency signal. 3. The microwave signal source output channel expansion method according to claim 1, said said intermediate frequency signal is processed to obtain intermediate frequency signal parameter information, comprising: performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain a sampling signal; and The sampled signal is vector decomposed to obtain the parameter information of the intermediate frequency signal. 4. microwave signal source output channel extension method according to claim 1, described according to described intermediate frequency signal parameter information realizes the duplication of described intermediate frequency signal in digital domain, obtains digital domain intermediate frequency signal, comprises: The duplication of the intermediate frequency signal in the digital domain is achieved by direct digital synthesis. 5. The method for extending the output channel of the microwave signal source according to claim 4, the operation of the direct digital synthesis comprises: phase accumulation, phase-amplitude conversion, and digital-to-analog conversion. 6. The microwave signal source output channel expansion method according to claim 1, performing up-conversion of the digital domain intermediate frequency signal to recover a target microwave signal highly consistent with the original microwave signal, comprising: multiplying the intermediate frequency signal in the digital domain by the local oscillator signal to obtain a second mixed frequency signal; and Filtering high frequency mixing components in the second frequency mixing signal to obtain a target microwave signal. 7. A microwave signal source output channel expansion device, comprising: The down-conversion module is connected with the signal source, and is used for down-converting the original microwave signal output by the signal source to be expanded to obtain an intermediate frequency signal; A signal processing module, connected to the frequency down conversion module, for processing the intermediate frequency signal to obtain parameter information of the intermediate frequency signal; wherein, the parameter information of the intermediate frequency signal includes: amplitude, frequency and phase; The DDS module is connected to the signal processing module, and is used to realize the duplication of the intermediate frequency signal in the digital domain according to the parameter information of the intermediate frequency signal, and obtain the intermediate frequency signal in the digital domain; and The frequency up-conversion module is connected with the DDS module, and is used for up-converting the digital domain intermediate frequency signal to recover a target microwave signal highly consistent with the original microwave signal, and controlling multiple channels to output the target microwave signal synchronously. 8. The microwave signal source output channel expansion device according to claim 7, the down-conversion module comprising: A first frequency mixing unit, configured to multiply the original microwave signal by a local oscillator signal to obtain a first frequency mixing signal; and A low-pass filter, connected to the first frequency mixing unit, is used to filter out high frequency mixing components in the first frequency mixing signal to obtain an intermediate frequency signal. 9. The microwave signal source output channel expansion device according to claim 7, said signal processing module comprising: an ADC unit, configured to perform digital-to-analog conversion on the intermediate frequency signal and perform sampling to obtain a sampling signal; and The I/Q demodulation unit is used to vector-decompose the sampled signal to obtain parameter information of the intermediate frequency signal. 10. The microwave signal source output channel expansion device according to claim 7, said up-conversion module, comprising: The second frequency mixing unit is used to multiply the digital domain intermediate frequency signal and the local oscillator signal to obtain a second frequency mixing signal; and A low-pass filter, connected to the second frequency mixing unit, is used to filter out high frequency mixing components in the second frequency mixing signal to obtain a target microwave signal.

Images