CN114759934A - Microwave signal source output channel expansion method and device - Google Patents
Microwave signal source output channel expansion method and device Download PDFInfo
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Abstract
The invention provides a method for expanding an output channel of a microwave signal source, which comprises the following steps: carrying out down-conversion processing on an original microwave signal output by a channel to be expanded of a signal source to obtain an intermediate frequency signal; processing the intermediate frequency signal to obtain intermediate frequency signal parameter information; copying the intermediate frequency signal in a digital domain according to the intermediate frequency signal parameter information to obtain an intermediate frequency signal in the digital domain; and performing up-conversion on the digital domain intermediate frequency signal to recover a target microwave signal which is highly consistent with the original microwave signal, and controlling a multi-channel to synchronously output the target microwave signal. Meanwhile, the microwave signal source output channel expansion device is also provided, and the frequency, amplitude and phase of output signals of each expansion channel can be kept consistent with the height of received source signals; the problem of obvious phase difference existing in an extended signal channel by using a traditional method is solved.
Description
Technical Field
The invention relates to the technical field of microwave measurement control and superconducting quantum computing chip testing, in particular to a high-consistency extension method and device for an output channel of a microwave signal source.
Background
The quantum computation is a novel computation mode for regulating and controlling a quantum information unit to perform computation according to a quantum mechanics law. The physical architecture of the quantum computing chip is multi-input multi-output, and a multi-channel high-consistency signal source is required as input in the chip testing process. The common signal source generally has only 1-2 channels, and can not meet the test requirement; the problem of obvious phase inconsistency exists when the traditional power divider is used for expanding the signal channel, the phase difference is generally as high as +/-7 degrees to +/-10 degrees, and therefore the requirement of testing a quantum computing chip is difficult to meet when the traditional power divider is used for expanding the output channel of the signal source.
Disclosure of Invention
Technical problem to be solved
Based on the above problems, the present invention provides a method and an apparatus for expanding an output channel of a microwave signal source, so as to alleviate the technical problems of obvious phase inconsistency and the like in the prior art that signal channel expansion is performed by using a traditional power divider.
(II) technical scheme
In one aspect of the present invention, a method for expanding an output channel of a microwave signal source is provided, which includes: carrying out down-conversion processing on an original microwave signal output by a channel to be expanded of a signal source to obtain an intermediate frequency signal; processing the intermediate frequency signal to obtain intermediate frequency signal parameter information; copying the intermediate frequency signal in a digital domain according to the intermediate frequency signal parameter information to obtain an intermediate frequency signal in the digital domain; and performing up-conversion on the intermediate frequency signal in the digital domain to restore the intermediate frequency signal to a target microwave signal which is highly consistent with the original microwave signal, and controlling the multichannel to synchronously output the target microwave signal.
According to the embodiment of the invention, the method for obtaining the intermediate frequency signal by carrying out down-conversion processing on the original microwave signal output by the channel to be expanded of the signal source comprises the following steps: multiplying the original microwave signal by a local oscillator signal to obtain a first mixing signal; and filtering the high mixing component in the first mixing signal to obtain an intermediate frequency signal.
According to the embodiment of the invention, the processing of the intermediate frequency signal to obtain the parameter information of the intermediate frequency signal comprises the following steps: performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain a sampling signal; and carrying out vector decomposition on the sampling signal to obtain intermediate frequency signal parameter information.
According to the embodiment of the invention, the intermediate frequency signal parameter information comprises: amplitude, frequency and phase.
According to the embodiment of the invention, the method for realizing the copy of the intermediate frequency signal in the digital domain according to the parameter information of the intermediate frequency signal to obtain the intermediate frequency signal in the digital domain comprises the following steps: the replication of the intermediate frequency signal in the digital domain is achieved by direct digital synthesis.
According to an embodiment of the invention, the operation of direct digital synthesis comprises: phase accumulation, phase-amplitude conversion, and digital-to-analog conversion.
According to the embodiment of the invention, the up-conversion of the intermediate frequency signal in the digital domain to restore the target microwave signal with high consistency with the original microwave signal comprises the following steps: multiplying the intermediate frequency signal of the digital domain by the local oscillation signal to obtain a second mixing signal; and filtering high mixing frequency components in the second mixing frequency signal to obtain a target microwave signal.
In another aspect of the present invention, there is provided a microwave signal source output channel expanding apparatus, including: the device comprises a down-conversion module, a signal processing module, a DDS module and an up-conversion module.
The down-conversion module is connected with the signal source and used for performing down-conversion processing on an original microwave signal output by a channel to be expanded of the signal source to obtain an intermediate frequency signal;
the signal processing module is connected with the down-conversion module and is used for processing the intermediate-frequency signals to obtain intermediate-frequency signal parameter information;
the DDS module is connected with the signal processing module and used for realizing the copy of the intermediate frequency signal in a digital domain according to the parameter information of the intermediate frequency signal to obtain the intermediate frequency signal in the digital domain; and
and the up-conversion module is connected with the DDS module and used for up-converting the digital domain intermediate frequency signal to recover a target microwave signal with high consistency with the original microwave signal and controlling the multichannel synchronous output of the target microwave signal.
According to an embodiment of the present invention, the down conversion module includes a first mixing unit, and a low pass filter. The first frequency mixing unit is used for multiplying an original microwave signal and a local oscillator signal to obtain a first frequency mixing signal; and the low-pass filter is connected with the first mixing unit and is used for filtering high mixing components in the first mixing signal to obtain an intermediate frequency signal.
According to an embodiment of the present invention, the signal processing module includes an ADC unit, and an I/Q demodulation unit. The ADC unit is used for performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain a sampling signal; and the I/Q demodulation unit is used for carrying out vector decomposition on the sampling signal to acquire intermediate frequency signal parameter information.
According to an embodiment of the present invention, the up-conversion module includes a second mixing unit, and a low-pass filter. The second frequency mixing unit is used for multiplying the intermediate frequency signal in the digital domain with the local oscillator signal to obtain a second frequency mixing signal; and the low-pass filter is connected with the second frequency mixing unit and used for filtering high frequency mixing components in the second frequency mixing signal to obtain a target microwave signal.
(III) advantageous effects
It can be seen from the above technical solutions that the microwave signal source output channel expanding method and apparatus of the present invention have at least one or a part of the following beneficial effects:
(1) the frequency, amplitude and phase energy of the output signal of each expansion channel are consistent with the height of the received source signal;
(2) the problem of obvious phase difference existing in an extended signal channel by using a traditional method is solved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
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 is a block diagram schematically illustrating a microwave signal source output channel expanding apparatus according to an embodiment of the present invention;
fig. 3 schematically shows a system block diagram of an electronic device suitable for implementing the method for expanding the output channel of the microwave signal source according to an embodiment of the present invention.
[ description of main element symbols in the embodiments of the invention ] in the accompanying drawings
S110-S140-operation step;
200-microwave signal source output channel expanding device
210-a down-conversion module;
220-a signal processing module;
230-DDS module;
240-up-conversion module;
301-a memory;
302-a processor;
303-radio frequency front end.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It is to be understood that such description is merely illustrative and 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. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts 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 "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude 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 same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
Where a convention analogous to "at least one of A, B and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B and C" would include but not be limited to systems that have a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a method and a device for expanding an output channel of a microwave signal source, wherein a certain path of output of the microwave signal source is set as a signal channel to be expanded, a receiving channel of a radio frequency front-end down-conversion module is utilized to perform down-conversion processing on a microwave signal output by the channel, and a source signal is converted into an intermediate frequency; performing ADC conversion and sampling on the source signal which is converted from the down-conversion to the intermediate frequency in the previous step, and obtaining frequency, amplitude and phase information of the intermediate frequency signal after I/Q orthogonal decomposition; according to the frequency, amplitude and phase information of the intermediate frequency signal obtained in the last step, adopting a Direct Digital Synthesis (DDS) technology to generate the intermediate frequency signal again; the intermediate frequency signal is up-converted into an extension signal with the height consistent with that of the source signal through the radio frequency front end, and the extended microwave signal is synchronously output through a plurality of transmitting channels, so that the high-consistency extension of the original channel of the signal source is realized. In the implementation process of the expansion method, the original signal output by the signal source can be synchronously output from a plurality of channels after down-conversion, ADC, sampling, I/Q quadrature demodulation, DDS and up-conversion, so that the expansion of the signal source channel from one channel to multiple channels is realized, and the test requirement of a quantum computing chip is met; and the intermediate frequency signal of each path of extension signal is synthesized from the frequency, amplitude and phase information of the source signal, and simultaneously is synchronously transmitted by the same up-conversion signal, so that the frequency, amplitude and phase of the output signal of each extension channel can be kept highly consistent with the received source signal, and the problem of obvious phase difference in the extension signal channel by using the traditional method is solved.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Fig. 1 schematically shows a flowchart of a method for expanding an output channel of a microwave signal source according to an embodiment of the present invention.
As shown in fig. 1, the microwave signal source output channel expansion method includes operations S110 to S140.
In operation S110, performing down-conversion processing on an original microwave signal output by a channel to be expanded of a signal source to obtain an intermediate frequency signal;
according to an embodiment of the present invention, operation S110 includes:
multiplying an original microwave signal by a local oscillator signal to obtain a first mixing signal;
and filtering high mixing frequency components in the first mixing frequency signal to obtain an intermediate frequency signal.
That is, the original microwave signal is down-converted (down conversion) for subsequent digital-to-analog conversion and sampling.
For example, the frequency f of the original microwave signal at the output of a channel of the signal source to be expandedM499.8MHz, the frequency f of the local oscillator signal LOLOSetting 499.8+31.2375(499.8/16) ═ 531.0375MHz, where 16 is frequency division number, and according to the principle of integration and difference, multiplying the original microwave signal by the local oscillator signal LO to obtain the frequency component in the first mixing signal, including: first low mixing component f IF＝fLO-fMFirst high mixing component fH＝fLO+fMThen f isIFComprises the following steps: 531.0375-499.8 MHz (31.2375 MHz, f)HComprises the following steps: 531.0375+499.8 is 1030.838MHz, and the first high mixing frequency component f in the first mixing frequency signal is converted by a low-pass filterHIs filtered out to leave a frequency fIFThe intermediate frequency signal is obtained, which realizes the down-conversion of the original microwave signal. The obtained 31.2375MHz intermediate frequency signal can be subjected to next digital-to-analogConverted (ADC) and sampled.
In operation S120, the intermediate frequency signal is processed to obtain intermediate frequency signal parameter information.
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 sampling signal; and
and carrying out vector decomposition on the sampling signal to obtain parameter information of the intermediate frequency signal.
According to the embodiment of the invention, the intermediate frequency signal of 31.2375MHz in operation S110 is subjected to high-precision digital-to-analog conversion and sampling by using the ADC.
The sampled signal is vector decomposed into two components with the same frequency, the same peak amplitude and the phase difference of 90 degrees. These two components are usually described using a sine signal (a × sinwt) and a cosine signal (a × coswt), where the cosine component is called the in-phase component, i.e. the I component; the sinusoidal component, referred to as the quadrature component, i.e., the Q component, has:
Wherein A is the amplitude of the intermediate frequency signal,
the phase of the intermediate frequency signal.
Therefore, after sampling the intermediate frequency signal ADC, performing I/Q orthogonal decomposition, and calculating according to the formula, 31.2375MHz intermediate frequency signal parameter information can be obtained: frequency, amplitude and phase information.
In operation S130, the intermediate frequency signal is copied in the digital domain according to the intermediate frequency signal parameter information, so as to obtain a digital domain intermediate frequency signal.
According to the embodiment of the invention, 31.2375MHz intermediate frequency signals in operation S120 are synthesized again by adopting a Direct Digital Synthesizer (DDS for short); and realizing the copy of the intermediate frequency signal in the digital domain to obtain the intermediate frequency signal in the digital domain. DDS is a digital electronic technique that can generate waveforms of arbitrary frequency, amplitude, and phase using a single (or mixed) frequency source.
A full DDS at a time consists essentially of three operations, including: phase accumulation, phase amplitude conversion and digital-to-analog conversion. By exploiting the property of the sinusoidal phase increasing linearly, a circle is first divided equally into 2N fractions, where N is the number of bits of the frequency tuning word, each with its corresponding amplitude on the look-up table. The Frequency accumulator accumulates a fixed value FTW (Frequency Tuning Word) every time the DDS works, which is equivalent to increasing the phase by 2 pi FTW/2 NThus changing FTW corresponds to changing angular velocity. The phase amplitude conversion obtains an amplitude value from the lookup table according to the value of the frequency accumulator, and the DAC restores the corresponding signal according to the amplitude value. The DDS technique has many advantages over other frequency synthesis methods, including large bandwidth, fast frequency variation, continuous output signal phase, high frequency resolution, programmability, and full digitization, among others.
In operation S140, the digital domain intermediate frequency signal is up-converted to restore 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 oscillation signal to obtain a second mixing signal; and
and filtering high frequency mixing components in the second frequency mixing signal to obtain a target microwave signal.
Specifically, the digital domain intermediate frequency signal output after operation S130 is multiplied by a local oscillator signal generated by a local oscillator, and then processed by a low pass filter to obtain a frequency-converted high frequency signal. For example, the frequency f of the intermediate frequency signal in the digital domainIF' 31.2375MHz, frequency f of local oscillator signal LOLO531.0375MHz, according to the sum and difference principle, the frequency component in the second mixing signal obtained by multiplying the intermediate frequency signal in the digital domain by the local oscillator signal LO comprises: second low mixing component f M′＝fLO-fIF', second highest mixing component fH′＝fLO+fIF' use low pass filter, secondHigh mixing component fH' Filtering out, leaving the frequency fMThe second low mixing component of' 499.8MHz is used as the target microwave signal, which realizes up conversion (up conversion) of the intermediate frequency signal, and restores the signal to the microwave signal with high consistency in the channel to be expanded by the signal source.
Then the radio frequency front end controls a plurality of transmitting channels to synchronously output the target microwave signals after up-conversion, thereby realizing the expansion of the signal source channel from one channel to multiple channels, and each channel of expanded signals is from the same frequency component fMAnd (3) 499.8MHz, so that the method can realize high consistency of the amplitude and the phase of the output signal.
It should be noted that, unless explicitly indicating that different operations have execution sequences or different operations have execution sequences in technical implementation, the operations shown in the flowchart in the embodiment of the present invention may not be executed in sequence, or multiple operations may be executed at the same time.
Fig. 2 schematically shows a block diagram of an output channel expanding apparatus of a microwave signal source according to an embodiment of the present invention.
As shown in fig. 2, the microwave signal source output channel expanding means 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 configured to perform down-conversion processing on an original microwave signal output by a channel to be extended of the signal source to obtain an intermediate frequency signal;
according to an embodiment of the present invention, the down-conversion module 210 includes:
the first frequency mixing unit is used for multiplying the original microwave signal and a local oscillator signal to obtain a first frequency mixing signal; and
and the low-pass filter is connected with the first frequency mixing unit and used for filtering 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, configured to process 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:
the ADC unit is used for performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain a sampling signal; and
and the I/Q demodulation unit is used for carrying out vector decomposition on the sampling signal to acquire parameter information of the intermediate frequency signal.
Specifically, the I/Q demodulation unit performs quadrature vector decomposition on the sampled down-converted signal to completely acquire parameter information of the intermediate frequency signal, including: amplitude, frequency and phase.
A DDS module 230, connected to the signal processing module 220, configured to implement, according to the parameter information of the intermediate frequency signal, copying of the intermediate frequency signal in a digital domain, so as to obtain an intermediate frequency signal in the digital domain;
and an up-conversion module 240, connected to the DDS module 230, configured to up-convert the digital domain intermediate frequency signal to recover a target microwave signal highly consistent with the original microwave signal, and control multiple channels to synchronously output the target microwave signal.
The up-conversion module 240 includes:
the second frequency mixing unit is used for multiplying the intermediate frequency signal in the digital domain with the local oscillation signal to obtain a second frequency mixing signal; and
and the low-pass filter is connected with the second frequency mixing unit and used for filtering high frequency mixing components in the second frequency mixing signal to obtain a target microwave signal.
Therefore, the signal source channel can realize the extension from one channel to multiple channels so as to meet the test requirement of the quantum computing chip. Because the intermediate frequency signal of each path of extension signal is synthesized by using the frequency, amplitude and phase information of the source signal IF and is synchronously transmitted by the same up-conversion signal, the frequency, amplitude and phase information of the output signal of each extension channel can keep highly consistent with the source signal, and the problem of obvious phase difference existing in the extension signal channel by using the traditional method is solved.
Fig. 3 schematically shows a system block diagram of an electronic device suitable for implementing the method for expanding the output channel of the microwave signal source according to an embodiment of the present invention.
As shown in fig. 3, the electronic device system includes a memory 301, a processor 302, and a radio frequency front end 303, and the memory 301, the processor 302, and the radio frequency front end 303 are electrically connected to each other directly or indirectly to implement data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The memory 301 can be used for storing software programs and modules, such as program instructions/modules corresponding to the microwave signal source output channel expansion apparatus provided in the embodiment of the present invention, and the processor 302 executes various functional applications and data processing by executing the software programs and modules stored in the memory 301. The rf front end 303 may be used for down-conversion processing of the original signal of the signal source and up-conversion processing of the output signal.
The Memory 301 may be, but not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Read Only Memory (EPROM), an electrically Erasable Read Only Memory (EEPROM), and the like.
The processor 102 may be an integrated circuit chip having signal processing capabilities. The Processor 102 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.
It will be appreciated that the configuration shown in fig. 3 is merely illustrative and that the electronic device may include more or fewer components than shown in fig. 3 or have a different configuration than shown in fig. 3. The components shown in fig. 3 may be implemented in hardware, software, or a combination thereof.
In summary, the embodiment of the present invention provides a method and an apparatus for high-consistency extension of an output channel of a microwave signal source, in which a certain output channel of the microwave signal source is set as a channel to be extended, a receiving channel of a radio frequency front-end down-conversion module is used to perform down-conversion processing on a microwave signal output by the channel, and a source signal is converted to an intermediate frequency; performing ADC conversion and sampling on a source signal which is converted from down-conversion to intermediate frequency in the previous operation, and obtaining frequency, amplitude and phase information of the intermediate frequency signal after I/Q orthogonal decomposition; according to the frequency, amplitude and phase information of the intermediate frequency signal obtained by the last operation, adopting a Direct Digital Synthesis (DDS) technology to generate the intermediate frequency signal again; the intermediate frequency signal is up-converted into an extension signal with the height consistent with that of the source signal through the radio frequency front end, and the extension microwave signal is synchronously output through a plurality of transmitting channels, so that the high-consistency extension of the original channel of the signal source is realized. In the implementation process of the method, the original signal output by the signal source realizes down-conversion through the proposed high-consistency extension device of the output channel of the microwave signal source; ADC, sampling and I/Q quadrature demodulation are realized; realizing DDS; the up-conversion and synchronous output from a plurality of channels are realized, so that the signal source channel is expanded from one channel to a plurality of channels, and the test requirement of the quantum computing chip is met. Because the intermediate frequency signal of each path of extension signal is synthesized by using the frequency, amplitude and phase information of the source signal IF and is synchronously transmitted by the same up-conversion signal, the frequency, amplitude and phase information of the output signal of each extension channel can keep highly consistent with the source signal, and the problem of obvious phase difference existing in the extension signal channel by using the traditional method is solved.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). 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 shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.
The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the operations of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A method for expanding an output channel of a microwave signal source comprises the following steps:
carrying out down-conversion processing on an original microwave signal output by a channel to be expanded of a signal source to obtain an intermediate frequency signal;
processing the intermediate frequency signal to obtain intermediate frequency signal parameter information;
copying the intermediate frequency signal in a digital domain according to the intermediate frequency signal parameter information to obtain an intermediate frequency signal in the digital domain; and
and performing up-conversion on the digital domain intermediate frequency signal to recover a target microwave signal which is highly consistent with the original microwave signal, and controlling a multi-channel to synchronously output the target microwave signal.
2. The method according to claim 1, wherein the step of performing down-conversion processing on an original microwave signal output by a channel to be expanded of the signal source to obtain an intermediate frequency signal includes:
multiplying the original microwave signal by a local oscillation signal to obtain a first mixing signal; and
and filtering high mixing frequency components in the first mixing frequency signal to obtain an intermediate frequency signal.
3. The method for expanding the output channel of the microwave signal source according to claim 1, wherein the processing the intermediate frequency signal to obtain the parameter information of the intermediate frequency signal comprises:
Performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain a sampling signal; and
and carrying out vector decomposition on the sampling signal to obtain intermediate frequency signal parameter information.
4. The method according to claim 3, wherein the parameter information of the intermediate frequency signal comprises: amplitude, frequency and phase.
5. The method according to claim 1, wherein the implementing the duplication of the if signal in the digital domain according to the if signal parameter information to obtain a digital domain if signal comprises:
the replication of the intermediate frequency signal in the digital domain is achieved by direct digital synthesis.
6. The microwave-signal-source output-channel expanding method as claimed in claim 5, wherein said operation of direct digital synthesis comprises: phase accumulation, phase-amplitude conversion, and digital-to-analog conversion.
7. The method for expanding the output channel of the microwave signal source according to claim 1, up-converting the digital domain intermediate frequency signal to recover a target microwave signal with high consistency with the original microwave signal, comprising:
multiplying the intermediate frequency signal in the digital domain by the local oscillation signal to obtain a second mixing signal; and
and filtering high mixing frequency components in the second mixing frequency signal to obtain a target microwave signal.
8. An output channel expanding device of a microwave signal source, comprising:
the down-conversion module is connected with the signal source and used for performing down-conversion processing on an original microwave signal output by a channel to be expanded of the signal source to obtain an intermediate frequency signal;
the signal processing module is connected with the down-conversion module and is used for processing the intermediate-frequency signal to obtain intermediate-frequency signal parameter information;
the DDS module is connected with the signal processing module and is used for realizing the copy of the intermediate frequency signal in a digital domain according to the intermediate frequency signal parameter information to obtain an intermediate frequency signal in the digital domain; and
and the up-conversion module is connected with the DDS module and used for up-converting the digital domain intermediate frequency signal to recover a target microwave signal with high consistency with the original microwave signal and controlling a plurality of channels to synchronously output the target microwave signal.
9. The microwave-signal-source output-channel expanding apparatus of claim 8, the down-conversion module comprising:
the first frequency mixing unit is used for multiplying the original microwave signal and the local oscillation signal to obtain a first frequency mixing signal; and
and the low-pass filter is connected with the first frequency mixing unit and used for filtering high frequency mixing components in the first frequency mixing signal to obtain an intermediate frequency signal.
10. The microwave-signal-source output-channel expanding device of claim 8, the signal processing module comprising:
the ADC unit is used for performing digital-to-analog conversion on the intermediate frequency signal and sampling to obtain a sampling signal; and
and the I/Q demodulation unit is used for carrying out vector decomposition on the sampling signal to acquire intermediate frequency signal parameter information.
11. The microwave-signal-source output-channel expanding apparatus of claim 8, the up-conversion module, comprising:
the second frequency mixing unit is used for multiplying the intermediate frequency signal in the digital domain with the local oscillation signal to obtain a second frequency mixing signal; and
and the low-pass filter is connected with the second frequency mixing unit and used for filtering high frequency mixing components in the second frequency mixing signal to obtain a target microwave signal.
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