Microwave feedback adjustment method, device, equipment and storage medium

Abstract

The application discloses a microwave feedback adjusting method, device, equipment and storage medium, and the method comprises the following steps: obtaining an electric signal of a target frequency and inputting the electric signal into an equal-power power divider to obtain two reference electric signals; modulating one of the reference electric signals to obtain a reference light signal; obtaining a to-be-adjusted phase light signal and combining the to-be-adjusted phase light signal with the reference light signal to obtain a combined light signal; converting the combined light signal into a combined electric signal and converting the combined electric signal into another reference electric signal to obtain a sum frequency signal and a difference frequency signal; filtering the sum frequency signal and the difference frequency signal to obtain a target filtered signal; collecting a phase difference of the target filtered signal, and adjusting the phase of the target filtered signal through the phase difference to obtain a stable phase light signal. The application modulates the electric signal into the reference light signal through electric-optical modulation, adjusts the phase of the to-be-adjusted phase light signal through the reference light signal, and obtains the stable phase light signal, thereby solving the problem that the phase of the transmitted microwave signal may drift and affecting the stability of the phase, and realizing stable phase transmission.

Description

Technical Field

[0001] This invention relates to the field of microwave conditioning technology, and in particular to a microwave feedback conditioning method, apparatus, device, and storage medium. Background Technology

[0002] With the development of microwave photonics technology, the technique of modulating microwave signals into optical signals for transmission has been extensively studied, and related technologies have also gained attention in optically controlled phased array radar, radio astronomy, and modern space technology. Since fiber optic transmission technology for microwave signals is widely used in phased array radar and modern space technology, fiber optic phase stabilization technology has become a key technology for the application of microwave fiber optic transmission technology in key areas such as modern optically controlled radar. The surrounding environment has a significant impact on the phase changes of microwave photonic signals. Among these, temperature changes and mechanical vibrations have the greatest impact on optical fibers, both of which affect the transmission delay of the link to varying degrees, leading to random phase jitter in the transmitted signal. This phase drift of the transmitted microwave signal affects phase stability, which has a significant impact on precise phase feeding in distributed antenna systems, phase-stabilized transmission in space systems, and clock synchronization in distributed systems. Summary of the Invention

[0003] The main objective of this invention is to provide a microwave feedback adjustment method, apparatus, device, and storage medium, which aims to solve the technical problem that the phase of microwave signals transmitted in the prior art will drift, affecting the stability of the phase.

[0004] To achieve the above objectives, the present invention provides a microwave feedback control method, the method comprising the following steps:

[0005] Acquire the electrical signal of the target frequency and input the electrical signal of the target frequency to the equal power divider to obtain two stable reference electrical signals;

[0006] One of the two phase-stable reference electrical signals is electro-optically modulated to obtain a reference optical signal;

[0007] Acquire the phase-modulated optical signal, and input the phase-modulated optical signal and the reference optical signal into a multiplexer to perform multiplexing to obtain a multiplexed optical signal;

[0008] The combined optical signal is converted into a combined electrical signal, and the combined electrical signal and the other of the two stable reference electrical signals are input to a mixer for frequency conversion to obtain a sum frequency signal and a difference frequency signal.

[0009] The sum-frequency signal and the difference-frequency signal are filtered through a filter to obtain the target filtered signal;

[0010] The target filtered signal is sampled for phase difference, and the phase of the optical signal to be tuned is adjusted by the sampled phase difference to obtain a stable optical signal.

[0011] Optionally, before acquiring the target frequency electrical signal and inputting the target frequency electrical signal to the equal power divider to obtain two stable reference electrical signals, the method further includes:

[0012] Obtain the electrical signal generated by the crystal oscillator at a preset frequency;

[0013] The electrical signal generated by the crystal oscillator at the preset frequency is input to the transistor, so that the waveform of the electrical signal generated by the crystal oscillator at the preset frequency is distorted and various harmonics are generated.

[0014] The harmonics are input into a bandpass filter for filtering to obtain the harmonics of the target multiple.

[0015] Based on the harmonics of the target multiple, an electrical signal of the target frequency is obtained.

[0016] Optionally, the step of converting the combined optical signal into a combined electrical signal, and inputting the combined electrical signal and another of the two stable reference electrical signals into a mixer for frequency conversion to obtain a sum-frequency signal and a difference-frequency signal, includes:

[0017] The combined optical signal is input to a photodetector for demodulation to obtain the combined electrical signal;

[0018] The combined electrical signal is input to an amplifier for amplification to obtain the amplified combined electrical signal;

[0019] The amplified combined electrical signal and another of the two stable reference electrical signals are input to a mixer for frequency conversion, so as to obtain the sum of the frequencies of the amplified combined electrical signal and the two stable reference electrical signals and the difference between the frequencies of the amplified combined electrical signal and the two stable reference electrical signals, respectively.

[0020] The sum-frequency signal is obtained by summing the frequencies of the amplified combined electrical signal and the two stable reference electrical signals, and the difference-frequency signal is obtained by the frequency difference between the amplified combined electrical signal and the two stable reference electrical signals.

[0021] Optionally, the filter includes a high-pass filter and a low-pass filter, and the step of filtering the sum-frequency signal and the difference-frequency signal through the filter to obtain the target filtered signal includes:

[0022] The sum-frequency signal is filtered through a high-pass filter to obtain a first filtered signal;

[0023] The difference frequency signal is filtered through a low-pass filter to obtain a second filtered signal;

[0024] The target filtered signal is obtained based on the first filtered signal and the second filtered signal.

[0025] Optionally, the step of acquiring the phase difference of the target filtered signal and adjusting the phase of the optical signal to be tuned using the acquired phase difference to obtain a stable optical signal includes:

[0026] The target filtered signal is subjected to voltage acquisition to obtain the acquired voltage;

[0027] The acquired voltage is converted into an optical path phase value, and the phase difference is obtained through the optical path phase value;

[0028] The frequency of the crystal oscillator of the electrical signal generated by adjusting the phase difference is used to adjust the phase of the optical signal to be tuned, thereby obtaining a stable optical signal.

[0029] Optionally, the step of converting the acquired voltage into an optical path phase value and obtaining the phase difference through the optical path phase value includes:

[0030] The voltage of the current filtered signal is initially acquired and then acquired a second time to obtain the initial acquisition voltage and the target acquisition voltage.

[0031] An initial phase value is obtained using the initial acquisition voltage, and a target phase value is obtained using the target acquisition voltage.

[0032] The phase difference is obtained based on the target phase value and the initial phase value;

[0033] If the phase difference is greater than a preset value, then the frequency of the crystal oscillator of the generated electrical signal is adjusted according to the phase difference to adjust the phase of the optical signal to be tuned and obtain a stable optical signal.

[0034] Optionally, the step of performing initial and secondary sampling of the voltage of the current filtered signal to obtain the initial sampling voltage and the target sampling voltage includes:

[0035] Acquire the acquisition rules, and according to the acquisition rules, perform the initial acquisition and secondary acquisition of the voltage of the current filtered signal within a preset period to obtain a preset number of initial acquisition voltages and a preset number of secondary acquisition voltages.

[0036] The arithmetic average of the preset number of initial sampling voltages and the preset number of secondary sampling voltages is calculated to obtain the average initial sampling voltage and the average secondary sampling voltage.

[0037] Determine whether the number of average initial sampling voltages and average secondary sampling voltages both reach the quantity threshold;

[0038] If the target is reached, the average initial acquisition voltage and the average secondary acquisition voltage that have reached the threshold value are calculated by recursion to obtain the initial acquisition voltage and the target acquisition voltage.

[0039] If the target is not reached, return and continue to execute the acquisition rules, and perform the initial acquisition and secondary acquisition of the voltage of the current filtered signal within a preset period according to the acquisition rules, to obtain a preset number of initial acquisition voltages and a preset number of secondary acquisition voltages.

[0040] Furthermore, to achieve the above objectives, the present invention also proposes a microwave feedback adjustment device, the microwave feedback adjustment device comprising:

[0041] The signal acquisition module is used to acquire an electrical signal at a target frequency and input the electrical signal at the target frequency to an equal power divider to obtain two stable reference electrical signals.

[0042] The conversion module is used to electro-optically modulate one of the two stable reference electrical signals to obtain a reference optical signal;

[0043] The beam combiner module is used to acquire the phase-modulated optical signal, input the phase-modulated optical signal and the reference optical signal into the beam combiner for beam combining to obtain the beam combined optical signal;

[0044] The mixing module is used to convert the combined optical signal into a combined electrical signal, and input the combined electrical signal and another of the two stable reference electrical signals to the mixer for frequency conversion to obtain a sum frequency signal and a difference frequency signal.

[0045] The filtering module is used to filter the sum-frequency signal and the difference-frequency signal through a filter to obtain the target filtered signal;

[0046] The phase adjustment module is used to acquire the phase difference of the target filtered signal and adjust the phase of the optical signal to be adjusted by acquiring the phase difference to obtain a stable optical signal.

[0047] Furthermore, to achieve the above objectives, the present invention also proposes a microwave feedback adjustment device, which includes: a memory, a processor, and a microwave feedback adjustment program stored in the memory and executable on the processor, wherein the microwave feedback adjustment program is configured to implement the steps of the microwave feedback adjustment method as described above.

[0048] Furthermore, to achieve the above objectives, the present invention also proposes a storage medium storing a microwave feedback adjustment program, which, when executed by a processor, implements the steps of the microwave feedback adjustment method as described above.

[0049] This invention modulates an electrical signal into a reference optical signal using electro-optic modulation, and then uses the reference optical signal to adjust the phase of the optical signal to be modulated, thereby obtaining a stable optical signal. This solves the problem of phase drift in the transmission of microwave signals, which affects phase stability. It also achieves high phase difference recognition accuracy and stable phase transmission. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of the microwave feedback adjustment device for the hardware operating environment involved in the embodiments of the present invention;

[0051] Figure 2 This is a flowchart illustrating the first embodiment of the microwave feedback adjustment method of the present invention;

[0052] Figure 3 This is a flowchart illustrating the second embodiment of the microwave feedback adjustment method of the present invention;

[0053] Figure 4 This is a flowchart illustrating the third embodiment of the microwave feedback adjustment method of the present invention;

[0054] Figure 5 This is a structural block diagram of the first embodiment of the microwave feedback adjustment device of the present invention.

[0055] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0057] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of a microwave feedback adjustment device for the hardware operating environment involved in the embodiments of the present invention.

[0058] like Figure 1As shown, the microwave feedback modulation device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0059] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the microwave feedback modulation device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0060] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a microwave feedback adjustment program.

[0061] exist Figure 1 In the microwave feedback adjustment device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the microwave feedback adjustment device of the present invention can be set in the microwave feedback adjustment device, and the microwave feedback adjustment device calls the microwave feedback adjustment program stored in the memory 1005 through the processor 1001 and executes the microwave feedback adjustment method provided in the embodiment of the present invention.

[0062] This invention provides a microwave feedback control method, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the microwave feedback adjustment method of the present invention.

[0063] In this embodiment, the microwave feedback adjustment method includes the following steps:

[0064] Step S10: Obtain the electrical signal of the target frequency, and input the electrical signal of the target frequency to the equal power divider to obtain two stable reference electrical signals.

[0065] It should be noted that a power divider is a device that splits the energy of one input signal into two or more outputs of equal or unequal energy. Conversely, it can also combine the energy of multiple signals into one output, in which case it can also be called a combiner. The output ports of a power divider should maintain a certain degree of isolation. There are active and passive types. It can evenly distribute one signal into several outputs. Generally, each split has a few dB of attenuation. The attenuation varies depending on the signal frequency and the type of divider. To compensate for the attenuation, an amplifier is added to create a passive power divider.

[0066] It is understandable that an equal power divider divides a target frequency electrical signal into two equal frequency signals, i.e., reference electrical signals.

[0067] Step S20: Electro-optically modulate one of the two stable reference electrical signals to obtain a reference optical signal.

[0068] It should be noted that the process of modulating an electrical transmission signal into an optical signal is called electro-optic modulation. The main working principle of electro-optic modulation is the electro-optic effect. Taking lithium niobate electro-optic crystal as an example, its refractive index changes under the action of an electric field, thereby changing the optical path of the input beam and transferring electrical signal information to an optical signal.

[0069] It is understandable that, since the signal to be phase-modulated is a microwave signal and the reference signal needs to be high as soon as possible, the change of the reference signal will be more sensitive when the signal in the optical link is changed, so that the phase modulation will be more accurate.

[0070] Step S30: Acquire the phase-modulated optical signal, input the phase-modulated optical signal and the reference optical signal into a multiplexer for multiplexing, and obtain a multiplexed optical signal.

[0071] It should be noted that a multiplexer is an instrument used to combine two or more optical carrier signals of different wavelengths (carrying various information) at the transmitting end and couple them into the same optical fiber of the optical line for transmission.

[0072] Step S40: Convert the combined optical signal into a combined electrical signal, and input the combined electrical signal and the other of the two stable reference electrical signals into a mixer for frequency conversion to obtain a sum frequency signal and a difference frequency signal.

[0073] It should be noted that the conversion refers to photoelectric conversion, which converts the combined optical signal into an electrical signal. Photoelectric conversion is the process of directly converting solar radiation energy into electrical energy through the photovoltaic effect. The principle of this process is that photons transfer energy to electrons, causing them to move and thus forming an electric current.

[0074] It is understandable that a mixer is a circuit whose output signal frequency is equal to the sum, difference, or other combination of the frequencies of the two input signals. A mixer is usually composed of nonlinear components and frequency selection circuits. The mixer is located after the low noise amplifier and directly processes the radio frequency signal amplified by the low noise amplifier. In order to realize the mixing function, the mixer also needs to receive the local oscillator signal from the voltage-controlled oscillator. Its circuit works entirely in the radio frequency band.

[0075] Step S50: Filter the sum-frequency signal and the difference-frequency signal through a filter to obtain the target filtered signal.

[0076] It should be noted that a filter is a filtering circuit composed of capacitors, inductors, and resistors. A filter can effectively filter out a specific frequency point in the power line or frequencies other than that frequency point to obtain a power signal of a specific frequency, or eliminate a power signal after a specific frequency.

[0077] It is understandable that high-pass and low-pass filters are used to filter the sum-frequency signal and difference-frequency signal respectively to accurately eliminate interference signals.

[0078] Step S60: The phase difference of the target filtered signal is acquired, and the phase of the optical signal to be tuned is adjusted by the acquired phase difference to obtain a stable optical signal.

[0079] It should be noted that phase difference, also known as phase angle difference, phase difference, periodic phase difference, or positional phase difference, is the difference between the phases of two periodically changing physical quantities. When it is positive, the former is said to lead the latter, and when it is negative, the latter is said to lag behind the latter.

[0080] It is worth noting that when microwave signals are transmitted through optical fibers, the phase of the optical modulation signal is most affected by the external environment due to the significant influence of the optical fiber on the transmission of the signal. Changes in the fiber temperature affect the fiber length (thermal expansion and contraction) and the fiber refractive index. Changes in fiber length and refractive index affect the transmission path and speed of the optical signal, which in turn causes changes in the electrical length of the signal, and the phase also changes accordingly. By using the minimum phase difference that a mixer can identify, phase feedback control can be performed to keep the phase within a certain range and track it in real time.

[0081] This embodiment modulates an electrical signal into a reference optical signal using electro-optic modulation. The phase of the optical signal to be modulated is then adjusted using the reference optical signal to obtain a stable optical signal. This solves the problem of phase drift in microwave signal transmission, which affects phase stability. The phase difference recognition accuracy is high, and stable phase transmission is achieved.

[0082] refer to Figure 3 , Figure 3 This is a flowchart illustrating the second embodiment of the microwave feedback adjustment method of the present invention.

[0083] Based on the first embodiment described above, the microwave feedback adjustment method of this embodiment further includes, before step S10:

[0084] Step S01: Obtain the electrical signal generated by the crystal oscillator at a preset frequency.

[0085] It should be noted that crystal oscillators generally refer to crystal oscillators. Some electronic devices require AC signals with highly stable frequencies, but LC oscillators have poor stability and their frequencies are prone to drift (i.e., the frequency of the AC signal they generate is easily changed). By using a special component in the oscillator—a quartz crystal—a highly stable signal can be generated. Such oscillators using quartz crystals are called crystal oscillators.

[0086] It is understood that the preset frequency can be 100MHz. For example, if an electrical signal generated by a 100MHz crystal oscillator is obtained, it is highly stable and the frequency is not easy to drift. This embodiment does not impose specific limitations on this.

[0087] Step S02: Input the electrical signal generated by the crystal oscillator at the preset frequency to the transistor, so as to distort the waveform of the electrical signal generated by the crystal oscillator at the preset frequency and generate various harmonics.

[0088] It should be noted that a transistor, also known as a bipolar junction transistor or crystal transistor, is a semiconductor device that controls current. Its function is to amplify weak signals into electrical signals with larger amplitudes, and it is also used as a contactless switch.

[0089] It is understandable that distortion and various harmonics will occur during the process of amplifying the electrical signal generated by the crystal oscillator at the preset frequency using a transistor.

[0090] Step S03: Input each harmonic into a bandpass filter for filtering to obtain the harmonics of the target multiple.

[0091] It should be noted that a bandpass filter is a device that allows waves of a specific frequency band to pass through while blocking other frequency bands. It can allow frequency components within a certain frequency range to pass through, but attenuates frequency components in other ranges to an extremely low level. Therefore, by inputting each harmonic into a bandpass filter for filtering, the target harmonic multiple can be obtained.

[0092] Step S04: Obtain the electrical signal of the target frequency based on the harmonics of the target multiple.

[0093] It is understood that a bandpass filter can pass frequency components within a certain frequency range and attenuate frequency components in other ranges to an extremely low level, thus obtaining an electrical signal at the target frequency. The target frequency can be 4GHz, which is divided into two 2GHz reference electrical signals by an equal power divider. This embodiment does not impose specific limitations on this.

[0094] Furthermore, to improve the conversion speed, the step of converting the combined optical signal into a combined electrical signal and inputting the combined electrical signal and another of the two stable reference electrical signals into a mixer for frequency conversion to obtain a sum-frequency signal and a difference-frequency signal includes: inputting the combined optical signal into a photodetector for demodulation to obtain a combined electrical signal; inputting the combined electrical signal into an amplifier for amplification to obtain an amplified combined electrical signal; inputting the amplified combined electrical signal and another of the two stable reference electrical signals into a mixer for frequency conversion to obtain the sum of the frequencies of the amplified combined electrical signal and the two stable reference electrical signals, and the difference in frequencies between the amplified combined electrical signal and the two stable reference electrical signals; obtaining the sum-frequency signal based on the sum of the frequencies of the amplified combined electrical signal and the two stable reference electrical signals, and obtaining the difference-frequency signal based on the difference in frequencies between the amplified combined electrical signal and the two stable reference electrical signals.

[0095] It should be noted that photodetectors can convert light signals into electrical signals. The principle is that radiation causes a change in the conductivity of the irradiated material.

[0096] As is understandable, an amplifier is a device that amplifies the voltage or power of an input signal, consisting of vacuum tubes or transistors, power transformers, and other electrical components.

[0097] In practice, the combined optical signal is converted into a combined electrical signal by a photodetector. The combined electrical signal is then amplified and mixed with another of the two stable reference electrical signals to obtain the sum frequency signal and the difference frequency signal.

[0098] Furthermore, in order to eliminate interference, the filter includes a high-pass filter and a low-pass filter. The step of filtering the sum-frequency signal and the difference-frequency signal through the filter to obtain the target filtered signal includes: filtering the sum-frequency signal through the high-pass filter to obtain a first filtered signal; filtering the difference-frequency signal through the low-pass filter to obtain a second filtered signal; and obtaining the target filtered signal based on the first filtered signal and the second filtered signal.

[0099] It should be noted that a high-pass filter, also known as a low-cutoff filter or low-impedance filter, is a filter that allows frequencies above a certain cutoff frequency to pass through while greatly attenuating lower frequencies. It removes unnecessary low-frequency components or low-frequency interference from the signal. A low-pass filter is an electronic filtering device that allows signals below the cutoff frequency to pass through, but signals above the cutoff frequency cannot pass through.

[0100] It is understandable that the sum-frequency signal is the sum of the frequencies of the amplified combined electrical signal and the two stable reference electrical signals, which has a relatively high frequency, and therefore is filtered by a high-pass filter; the difference-frequency signal is the difference between the frequencies of the amplified combined electrical signal and the two stable reference electrical signals, which has a relatively low frequency, and therefore is filtered by a low-pass filter.

[0101] In this embodiment, an electrical signal is generated by a crystal oscillator at a preset frequency. The electrical signal is then amplified by a transistor to obtain an electrical signal at a target frequency. A reference electrical signal is obtained from the target frequency electrical signal. The reference electrical signal is then converted into a reference optical signal to adjust the phase of the phase signal to be modulated. The reference optical signal is highly sensitive to changes, making the phase adjustment more accurate.

[0102] refer to Figure 4 , Figure 4 This is a flowchart illustrating the third embodiment of the microwave feedback adjustment method of the present invention.

[0103] Based on the first embodiment described above, step S60 in the microwave feedback adjustment method of this embodiment includes:

[0104] Step S601: Perform voltage acquisition on the target filtered signal to obtain the acquired voltage.

[0105] It should be noted that voltage acquisition refers to acquiring the voltage value of the monitoring point. The voltage can be acquired through an A / D interface.

[0106] It is understandable that the voltage value has a negative part, and the A / D sampling range is 0 to 2.4V. Therefore, it is necessary to correct the negative sampling part to meet the phase difference requirements of the sampling voltage.

[0107] Step S602: Convert the acquired voltage into an optical path phase value, and obtain the phase difference through the optical path phase value.

[0108] It should be noted that phase is the position of a wave at a specific moment in its cycle: a scale indicating whether it is at a crest, trough, or somewhere in between. Phase describes the measure of change in a signal waveform, usually in degrees (angles), and is also called intersection. When a signal waveform changes periodically, one complete cycle of the waveform is 360°.

[0109] It is understandable that the optical phase value refers to the degree of alternating waveform changes exhibited by photon vibrations as the light wave propagates.

[0110] Step S603: Adjust the frequency of the crystal oscillator of the generated electrical signal according to the phase difference to adjust the phase of the optical signal to be tuned and obtain a stable optical signal.

[0111] It is understandable that the frequency of the crystal oscillator of the generated electrical signal is adjusted according to the phase difference to change the phase of the optical signal to be phased, thereby achieving the effect of stabilizing the phase and obtaining a stable optical signal.

[0112] Furthermore, to improve the accuracy of phase modulation, the step of converting the acquired voltage into an optical path phase value and obtaining a phase difference through the optical path phase value includes: performing initial and secondary acquisitions on the voltage of the current filtered signal to obtain an initial acquisition voltage and a target acquisition voltage; obtaining an initial phase value through the initial acquisition voltage and a target phase value through the target acquisition voltage; obtaining a phase difference based on the target phase value and the initial phase value; determining whether the phase difference is greater than a preset value; if so, then performing the step of adjusting the frequency of the crystal oscillator of the generated electrical signal according to the phase difference to adjust the phase of the optical signal to be phase-modulated and obtain a stable optical signal.

[0113] It should be noted that the voltage of the current filtered signal is sampled twice, and the corresponding phase value is obtained based on the two sampled voltages. The difference between the phase values ​​of the two sampled voltages is the phase difference.

[0114] It is understood that the preset value can be 10°, 20°, etc., and this embodiment does not impose specific limitations on it.

[0115] In practical implementation, for example, it is determined whether the phase difference is greater than 10°. If the phase difference is greater than 10°, phase adjustment is performed.

[0116] Furthermore, in order to eliminate interference signals to the greatest extent, the step of performing initial and secondary acquisitions of the voltage of the current filtered signal to obtain an initial acquisition voltage and a target acquisition voltage includes: acquiring acquisition rules, and performing initial and secondary acquisitions of the voltage of the current filtered signal within a preset period according to the acquisition rules to obtain a preset number of initial acquisition voltages and a preset number of secondary acquisition voltages; calculating the arithmetic mean of the preset number of initial acquisition voltages and the preset number of secondary acquisition voltages to obtain an average initial acquisition voltage and an average secondary acquisition voltage; determining whether the number of the average initial acquisition voltage and the average secondary acquisition voltage both reach a number threshold; if they do, calculating the recursive average of the average initial acquisition voltage and the average secondary acquisition voltage that have reached the number threshold to obtain the initial acquisition voltage and the target acquisition voltage; if they do not reach the threshold, returning and continuing to execute the steps of acquiring acquisition rules and performing initial and secondary acquisitions of the voltage of the current filtered signal within a preset period according to the acquisition rules to obtain a preset number of initial acquisition voltages and a preset number of secondary acquisition voltages.

[0117] It should be noted that the collected data are filtered using both arithmetic mean filtering and recursive mean filtering. Arithmetic mean filtering can filter out interference from random signals, while recursive mean filtering can filter out interference from periodic signals. Combining the two filtering algorithms can eliminate interference signals to the greatest extent possible.

[0118] It is understood that the preset period can be 1ms, 2ms, etc., the preset quantity can be 1000, 2000, 3000, etc., and the quantity threshold can be 10, 15, etc. This embodiment does not impose specific restrictions on these.

[0119] In the specific implementation, the voltage value is collected once every 1ms, and 1000 data points are collected per second. The 1000 data points are then filtered by arithmetic mean and used as one data element. The data is then processed by recursive mean filtering with a length of 10 data elements. The data after the two filtering processes are used as the current initial acquisition voltage and the target acquisition voltage.

[0120] This embodiment acquires voltage data from the target filtered signal and performs data filtering. The filtered acquired voltage is converted into a phase value, and the phase difference is obtained. The phase of the optical signal to be tuned is adjusted according to the phase difference to obtain a stable optical signal, thereby eliminating interference signals to the maximum extent and realizing stable phase transmission.

[0121] Reference Figure 5 , Figure 5 This is a structural block diagram of the first embodiment of the microwave feedback adjustment device of the present invention.

[0122] like Figure 5 As shown, the microwave feedback adjustment device proposed in this embodiment of the invention includes:

[0123] The signal acquisition module 10 is used to acquire an electrical signal at a target frequency and input the electrical signal at the target frequency to an equal power divider to obtain two stable reference electrical signals.

[0124] The conversion module 20 is used to electro-optically modulate one of the two stable reference electrical signals to obtain a reference optical signal;

[0125] The beam combiner module 30 is used to acquire the phase-modulated optical signal, input the phase-modulated optical signal and the reference optical signal to the beam combiner for beam combining, and obtain the beam combined optical signal;

[0126] The mixing module 40 is used to convert the combined optical signal into a combined electrical signal, and input the combined electrical signal and another of the two stable reference electrical signals to the mixer for frequency conversion to obtain a sum frequency signal and a difference frequency signal.

[0127] Filtering module 50 is used to filter the sum frequency signal and the difference frequency signal through a filter to obtain the target filtered signal;

[0128] The phase adjustment module 60 is used to acquire the phase difference of the target filtered signal and adjust the phase of the optical signal to be adjusted by acquiring the phase difference to obtain a stable optical signal.

[0129] In one embodiment, the signal acquisition module 10 is further configured to acquire an electrical signal generated by a crystal oscillator at a preset frequency; input the electrical signal generated by the crystal oscillator at the preset frequency to a transistor to distort the waveform of the electrical signal generated by the crystal oscillator at the preset frequency and generate various harmonics; input the various harmonics to a bandpass filter for filtering to obtain harmonics of a target multiple; and obtain an electrical signal of a target frequency based on the harmonics of the target multiple.

[0130] In one embodiment, the mixing module 40 is further configured to: input the combined optical signal to a photodetector for demodulation to obtain a combined electrical signal; input the combined electrical signal to an amplifier for amplification to obtain an amplified combined electrical signal; input the amplified combined electrical signal and another of the two stable reference electrical signals to a mixer for frequency conversion, respectively obtaining the sum of the frequencies of the amplified combined electrical signal and the two stable reference electrical signals and the frequency difference between the amplified combined electrical signal and the two stable reference electrical signals; obtain a sum frequency signal based on the sum of the frequencies of the amplified combined electrical signal and the two stable reference electrical signals; and obtain a difference frequency signal based on the frequency difference between the amplified combined electrical signal and the two stable reference electrical signals.

[0131] In one embodiment, the phase adjustment module 60 is further configured to acquire voltage of the target filtered signal to obtain an acquisition voltage; convert the acquisition voltage into an optical path phase value and obtain a phase difference through the optical path phase value; adjust the frequency of the crystal oscillator of the generated electrical signal according to the phase difference to adjust the phase of the optical signal to be phased and obtain a stable optical signal.

[0132] Furthermore, to achieve the above objectives, the present invention also proposes a microwave feedback adjustment device, which includes: a memory, a processor, and a microwave feedback adjustment program stored in the memory and executable on the processor, wherein the microwave feedback adjustment program is configured to implement the steps of the microwave feedback adjustment method as described above.

[0133] Since this microwave feedback adjustment device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0134] Furthermore, embodiments of the present invention also propose a storage medium storing a microwave feedback adjustment program, which, when executed by a processor, implements the steps of the microwave feedback adjustment method described above.

[0135] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0136] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0137] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0138] In addition, for technical details not described in detail in this embodiment, please refer to the microwave feedback adjustment method provided in any embodiment of the present invention, which will not be repeated here.

[0139] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0140] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0141] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0142] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A microwave feedback regulation method, characterized by, The method comprises: obtaining an electrical signal of a target frequency, inputting the electrical signal of the target frequency into an equal-power power divider to obtain two stable-phase reference electrical signals; electro-optically modulating one of the two stable-phase reference electrical signals to obtain a reference optical signal; obtaining a to-be-phase-modulated optical signal, inputting the to-be-phase-modulated optical signal and the reference optical signal into a combiner to obtain a combined optical signal; converting the combined optical signal into a combined electrical signal, inputting the combined electrical signal and the other of the two stable-phase reference electrical signals into a frequency converter to obtain sum frequency signals and difference frequency signals; filtering the sum frequency signals and the difference frequency signals through a filter to obtain a target filtered signal; collecting a phase difference of the target filtered signal, and phase-modulating the to-be-phase-modulated optical signal through the collected phase difference to obtain a stable-phase optical signal.

2. The method of claim 1, wherein, Before the step of obtaining an electrical signal of a target frequency, inputting the electrical signal of the target frequency into an equal-power power divider to obtain two stable-phase reference electrical signals, the method further comprises: obtaining an electrical signal generated by a crystal oscillator of a preset frequency; inputting the electrical signal generated by the crystal oscillator of the preset frequency into a triode to distort the waveform of the electrical signal generated by the crystal oscillator of the preset frequency and generate harmonics; inputting the harmonics into a band-pass filter to screen to obtain harmonics of a target multiple; obtaining an electrical signal of a target frequency according to the harmonics of the target multiple.

3. The method of claim 1, wherein, The step of converting the combined optical signal into a combined electrical signal, inputting the combined electrical signal and the other of the two stable-phase reference electrical signals into a frequency converter to obtain sum frequency signals and difference frequency signals comprises: inputting the combined optical signal into a photodetector to demodulate to obtain a combined electrical signal; inputting the combined electrical signal into an amplifier to amplify to obtain an amplified combined electrical signal; inputting the amplified combined electrical signal and the other of the two stable-phase reference electrical signals into a frequency converter to obtain a sum of frequencies of the amplified combined electrical signal and the other of the two stable-phase reference electrical signals and a difference of frequencies of the amplified combined electrical signal and the other of the two stable-phase reference electrical signals; obtaining sum frequency signals according to the sum of frequencies of the amplified combined electrical signal and the other of the two stable-phase reference electrical signals, and obtaining difference frequency signals according to the difference of frequencies of the amplified combined electrical signal and the other of the two stable-phase reference electrical signals.

4. The method of claim 1, wherein, The filter comprises a high-pass filter and a low-pass filter, and the step of filtering the sum frequency signals and the difference frequency signals through a filter to obtain a target filtered signal comprises: filtering the sum frequency signals through the high-pass filter to obtain a first filtered signal; filtering the difference frequency signals through the low-pass filter to obtain a second filtered signal; obtaining a target filtered signal according to the first filtered signal and the second filtered signal.

5. The method of claim 1, wherein, The step of collecting a phase difference of the target filtered signal, and phase-modulating the to-be-phase-modulated optical signal through the collected phase difference to obtain a stable-phase optical signal comprises: collecting a voltage of the target filtered signal to obtain a collected voltage; convert the collected voltage into an optical path phase value, and obtain a phase difference through the optical path phase value; adjust the frequency of a crystal oscillator of an electric signal generated according to the phase difference, so as to adjust the phase of the optical signal to be adjusted, and obtain a stable phase optical signal.

6. The method of claim 5, wherein, The conversion of the collected voltage into an optical path phase value and the obtaining of the phase difference through the optical path phase value comprise: The voltage of the current filtered signal is collected once and twice respectively to obtain an initial collected voltage and a target collected voltage; An initial phase value is obtained through the initial collected voltage, and a target phase value is obtained through the target collected voltage; A phase difference is obtained according to the target phase value and the initial phase value; If the phase difference is greater than a preset value, the frequency of a crystal oscillator of an electric signal generated is adjusted according to the phase difference, so as to adjust the phase of the optical signal to be adjusted, and obtain a stable phase optical signal.

7. The method of claim 6, wherein, The collection of the voltage of the current filtered signal once and twice respectively to obtain the initial collected voltage and the target collected voltage comprises: A collection rule is obtained, and the voltage of the current filtered signal is collected once and twice respectively in a preset period according to the collection rule to obtain a preset number of initial collected voltages and a preset number of secondary collected voltages; The preset number of initial collected voltages and the preset number of secondary collected voltages are respectively subjected to arithmetic average value calculation to obtain an average initial collected voltage and an average secondary collected voltage; It is judged whether the number of the average initial collected voltage and the average secondary collected voltage reaches a number threshold; If the number threshold is reached, the average initial collected voltage and the average secondary collected voltage reaching the number threshold are respectively subjected to recursive average value calculation to obtain the initial collected voltage and the target collected voltage; If the number threshold is not reached, the step of obtaining the collection rule and collecting the voltage of the current filtered signal once and twice respectively in a preset period according to the collection rule to obtain a preset number of initial collected voltages and a preset number of secondary collected voltages is returned and continued to be executed.

8. A microwave feedback regulating device, characterized by The device comprises: A signal acquisition module is configured to acquire an electric signal of a target frequency, input the electric signal of the target frequency into an equal-power power divider, and obtain two stable phase reference electric signals; A conversion module is configured to perform electro-optical modulation on one of the two stable phase reference electric signals to obtain a reference optical signal; A wave combining module is configured to acquire an optical signal to be adjusted in phase, input the optical signal to be adjusted in phase and the reference optical signal into a wave combiner to perform wave combining, and obtain a combined optical signal; A frequency mixing module is configured to convert the combined optical signal into a combined electric signal, input the combined electric signal and the other of the two stable phase reference electric signals into a frequency mixer to perform frequency conversion, and obtain a sum frequency signal and a difference frequency signal; A filtering module is configured to filter the sum frequency signal and the difference frequency signal through a filter to obtain a target filtered signal; A phase adjustment module is configured to collect a phase difference of the target filtered signal, adjust the phase of the optical signal to be adjusted in phase through the collected phase difference, and obtain a stable phase optical signal.

9. A microwave feedback regulating device, characterized by The microwave feedback adjustment device comprises a memory, a processor, and a microwave feedback adjustment program stored on the memory and executable on the processor, and the microwave feedback adjustment program is configured to implement the microwave feedback adjustment method according to any one of claims 1 to 7.

10. A storage medium, characterized by The storage medium stores a microwave feedback adjustment program, and the microwave feedback adjustment program is executed by the processor to implement the microwave feedback adjustment method according to any one of claims 1 to 7.

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