Microwave signal adjusting method, device, equipment and storage medium

Abstract

The present application relates to the technical field of microwave regulation, and discloses a microwave signal regulation method, device, equipment and storage medium, the method comprising: obtaining a reference signal output by a microwave source, and obtaining a reference voltage according to the reference signal; obtaining an initial frequency modulation signal output by a voltage-controlled oscillator, and obtaining a frequency modulation voltage according to the initial frequency modulation signal; inputting the reference voltage and the frequency modulation voltage into a phase discriminator for comparison, and obtaining an error voltage; inputting the error voltage into a loop filter for filtering, and obtaining an average voltage; inputting the average voltage into the voltage-controlled oscillator for oscillation, and obtaining a target frequency modulation signal; inputting the target frequency modulation signal into a voltage-controlled attenuator for regulation, and obtaining a target output power.The present application adjusts the initial frequency modulation signal according to the reference signal, obtains the target frequency modulation signal of the target output power, solves the problem that the traditional microwave power source cannot realize large-range adjustment of frequency and power, and is convenient to debug, small in size and high in frequency accuracy.

Description

Technical Field

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

[0002] With the continuous development of high-power microwave systems such as radar, communication, electronic warfare, television broadcasting, particle accelerators, controlled thermonuclear fusion devices, microwave remote sensing, and microwave energy applications, plasma technology has also become increasingly mature. Its inventions and achievements are widely used in industrial production and daily life. Among them, microwave plasma technology is recognized and favored by the industry for its high electron temperature, high electron density, high ionization degree, wide working pressure range, and no electrode pollution. The main source of energy for microwave plasma equipment is the microwave generator. The microwave generator is the unit that provides energy for microwave plasma devices. It can convert electrical energy into microwave energy at a rated frequency (915MHz and 2.4GHz) and realize the regulation of microwave power. As the core functional unit of microwave plasma equipment, the stability and reliability of the output power of the microwave generator seriously affect the development of microwave plasma technology. However, traditional microwave power sources cannot achieve a wide range of adjustable frequency and power, are easily affected by factors such as temperature, and are large in size, which can easily lead to various unforeseen problems. Summary of the Invention

[0003] The main objective of this invention is to provide a microwave signal conditioning method, apparatus, device, and storage medium, aiming to solve the technical problems of existing conventional microwave power sources, which cannot achieve a wide range of adjustable frequency and power, are easily affected by factors such as temperature, and are large in size, which can easily lead to various unforeseen problems.

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

[0005] Obtain the reference signal output by the microwave source, and obtain the reference voltage based on the reference signal;

[0006] Obtain the initial frequency modulation signal output by the voltage-controlled oscillator, and obtain the frequency modulation voltage based on the initial frequency modulation signal;

[0007] The reference voltage and the frequency-modulated voltage are input to a phase detector for comparison to obtain the error voltage;

[0008] The error voltage is input to a loop filter for filtering to obtain the average voltage.

[0009] The average voltage is input to the voltage-controlled oscillator for oscillation to obtain the target frequency modulation signal;

[0010] The target frequency modulation signal is input to the voltage-controlled attenuator for adjustment to obtain the target output power.

[0011] Optionally, obtaining the initial frequency modulation signal output by the voltage-controlled oscillator and obtaining the frequency modulation voltage based on the initial frequency modulation signal includes:

[0012] The initial frequency modulation signal output by the voltage-controlled oscillator is obtained, and the initial frequency modulation signal is divided by a prescaler to obtain the frequency-divided frequency modulation signal.

[0013] The frequency modulation voltage is obtained from the frequency-modulated signal after frequency division.

[0014] Optionally, the step of comparing the reference voltage with the frequency-modulated voltage input to the phase detector to obtain the error voltage includes:

[0015] The reference voltage and the frequency-modulated voltage are input to a phase detector for comparison to obtain a phase detection signal. The phase of the phase detection signal is proportional to the phase difference between the reference signal and the frequency-modulated signal after frequency division.

[0016] Based on the phase of the phase detection signal, the phase difference between the reference signal and the frequency-modulated signal after frequency division is obtained;

[0017] The error voltage is obtained based on the phase difference between the reference signal and the frequency-modulated signal after frequency division.

[0018] Optionally, after inputting the error voltage to a loop filter for filtering to obtain an average voltage, the method further includes:

[0019] The average voltage is adjusted so that it changes in the direction of reducing the difference between the frequency of the initial frequency modulation signal output by the voltage-controlled oscillator and the frequency of the reference signal, until the frequency of the initial frequency modulation signal and the frequency of the reference signal are the same.

[0020] Optionally, the step of inputting the target frequency-modulated signal to a voltage-controlled attenuator for adjustment to obtain the target output power includes:

[0021] Determine the target output power, determine the output frequency and output period based on the target output power, and determine the pulse period based on the output period;

[0022] The digital value of the target output power is converted into a pulse duty cycle to obtain the target PWM pulse;

[0023] The PWM pulse is input to a low-pass filter for demodulation to obtain an analog voltage signal;

[0024] The analog voltage corresponding to the analog voltage signal is input to the control terminal of the voltage-controlled attenuator. By adjusting the analog voltage, the voltage-controlled attenuator controls the target frequency modulation signal to attenuate to different degrees, thereby obtaining the target output power.

[0025] Optionally, converting the digital value of the target output power into a pulse duty cycle to obtain the target PWM pulse includes:

[0026] The count value of the timer that obtains the pulse duty cycle is determined by the number of bits or the word length, which is used as the counting threshold.

[0027] The bisection of the counting threshold is used as the initial trial value, and the bisection of the remaining value after the counting threshold is bisected is used as the initial increment;

[0028] The initial trial value is compared with the digital value of the target output power, and the magnitude of the initial trial value and the digital value of the target output power is determined.

[0029] If the initial trial value is less than the digital value of the target output power, then the initial trial value is retained and used as the retained value. The sum of the initial increment and the retained value is obtained as the new initial trial value, and a count is performed to obtain the count value.

[0030] Determine whether the count value exceeds the maximum count value;

[0031] If it exceeds the limit, the last new initial trial value will be used as the target trial value.

[0032] The target probe value is converted into a PWM pulse to obtain the target PWM pulse.

[0033] Optionally, after comparing the initial probe value with the digital value of the target output power and determining the magnitude of the initial probe value and the digital value of the target output power, the method further includes:

[0034] If the initial trial value is greater than or equal to the target output power, the initial trial value is removed, the remaining value is recalculated and used as a new increment, and the sum of the new increment and the previously retained value is obtained as a new initial trial value. Counting is then performed to obtain the count value.

[0035] Furthermore, to achieve the above objectives, the present invention also proposes a microwave signal conditioning device, the microwave signal conditioning device comprising:

[0036] The first signal acquisition module is used to acquire the reference signal output by the microwave source and obtain the reference voltage based on the reference signal;

[0037] The second signal acquisition module is used to acquire the initial frequency modulation signal output by the voltage-controlled oscillator and obtain the frequency modulation voltage based on the initial frequency modulation signal;

[0038] A voltage comparison module is used to compare the reference voltage with the frequency modulation voltage input to a phase detector to obtain an error voltage;

[0039] The filtering module is used to input the error voltage to the loop filter for filtering to obtain the average voltage;

[0040] An oscillation module is used to input the average voltage to the voltage-controlled oscillator for oscillation to obtain a target frequency modulation signal;

[0041] The power adjustment module is used to input the target frequency modulation signal to the voltage-controlled attenuator for adjustment to obtain the target output power.

[0042] Furthermore, to achieve the above objectives, the present invention also proposes a microwave signal conditioning device, which includes: a memory, a processor, and a microwave signal conditioning program stored in the memory and executable on the processor, wherein the microwave signal conditioning program is configured to implement the steps of the microwave signal conditioning method described above.

[0043] Furthermore, to achieve the above objectives, the present invention also proposes a storage medium storing a microwave signal conditioning program, which, when executed by a processor, implements the steps of the microwave signal conditioning method described above.

[0044] This invention adjusts the initial frequency modulation signal based on the reference signal to obtain the target frequency modulation signal with the target output power. It solves the technical problems of traditional microwave power sources in the prior art, which cannot achieve a wide range of adjustable frequency and power, are easily affected by factors such as temperature, and are large in size, which can easily lead to various unforeseen problems. This invention can adjust the frequency and output power separately and has the advantages of convenient debugging, small size, high frequency accuracy, good power flatness, low operating voltage, high efficiency, long life and high reliability. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of a microwave signal conditioning device in the hardware operating environment involved in the embodiments of the present invention;

[0046] Figure 2 This is a flowchart illustrating the first embodiment of the microwave signal modulation method of the present invention;

[0047] Figure 3 This is a flowchart illustrating the second embodiment of the microwave signal modulation method of the present invention;

[0048] Figure 4This is a flowchart illustrating the third embodiment of the microwave signal modulation method of the present invention;

[0049] Figure 5 This is a structural block diagram of the first embodiment of the microwave signal conditioning device of the present invention.

[0050] 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

[0051] 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.

[0052] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of a microwave signal conditioning device for the hardware operating environment involved in the embodiments of the present invention.

[0053] like Figure 1 As shown, the microwave signal conditioning 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.

[0054] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on microwave signal conditioning equipment and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0055] 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 signal conditioning program.

[0056] exist Figure 1In the microwave signal conditioning 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 signal conditioning device of the present invention can be set in the microwave signal conditioning device, and the microwave signal conditioning device calls the microwave signal conditioning program stored in the memory 1005 through the processor 1001 and executes the microwave signal conditioning method provided in the embodiment of the present invention.

[0057] This invention provides a microwave signal modulation method, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the microwave signal modulation method of the present invention.

[0058] In this embodiment, the microwave signal modulation method includes the following steps:

[0059] Step S10: Obtain the reference signal output by the microwave source, and obtain the reference voltage based on the reference signal.

[0060] It should be noted that a microwave source is a device that generates microwave energy. Different therapeutic purposes require microwave energy of different frequencies and powers. There are continuous wave sources and pulse modulation wave sources. Some use magnetrons and others use microwave transistors to generate microwave oscillations. The requirements for microwave sources are the stability of output power and frequency.

[0061] It is understandable that the reference signal, or "pilot" signal, is a known signal provided by the transmitter to the receiver for channel estimation or channel detection.

[0062] It should be understood that a reference voltage is a voltage in a circuit that remains constant regardless of load, power supply, temperature drift, time, etc. Reference voltages can be used in power supply system regulators, analog-to-digital converters and digital-to-analog converters, as well as many other measurement and control systems. The magnitude of the reference voltage varies in different applications. For example, in a typical computer power supply system, the reference voltage error is no more than one to a few percent of its nominal value, while laboratory reference voltage standards have higher stability and accuracy measured in parts per million.

[0063] Step S20: Obtain the initial frequency modulation signal output by the voltage-controlled oscillator, and obtain the frequency modulation voltage based on the initial frequency modulation signal.

[0064] It should be noted that the voltage-controlled oscillator refers to an oscillation circuit in which the output frequency corresponds to the input control voltage, and the frequency is a function of the input signal voltage. The operating state of the oscillator or the component parameters of the oscillation circuit are controlled by the input control voltage, which constitutes a voltage-controlled oscillator.

[0065] It is understood that the initial frequency modulation signal is the signal to be adjusted, and the voltage-controlled oscillator is also called a frequency modulator, which is used to generate the frequency modulation signal. The frequency modulation voltage is the voltage of the signal to be adjusted.

[0066] Furthermore, in order to increase the output frequency, step S20 includes: acquiring the initial frequency modulation signal output by the voltage-controlled oscillator, and dividing the initial frequency modulation signal by a prescaler to obtain the frequency-divided frequency modulation signal; and obtaining the frequency modulation voltage based on the frequency-divided frequency modulation signal.

[0067] It should be noted that the prescaler is a fractional frequency divider. A frequency divider is a widely used circuit whose function is to divide a higher frequency signal to obtain the required lower frequency signal. In practical applications, the required division coefficient may be an integer or a fraction. Integer frequency division is relatively simple to implement and can be designed using a counter chip or a programmable logic device.

[0068] It is understood that the prescaler can divide the signal by 2, 4, 8, and 16, etc., and this embodiment does not impose specific limitations on this.

[0069] In a specific implementation, for example, the frequency of the initial frequency modulation signal output by the voltage-controlled oscillator can be 400MHz. Then, the prescaler can be selected to divide the frequency by 8. After the frequency is divided by the prescaler, a frequency modulation signal with a frequency of 50MHz is obtained. The frequency modulation voltage is obtained based on the frequency modulation signal after the frequency division.

[0070] Step S30: The reference voltage and the frequency modulation voltage are input to the phase detector for comparison to obtain the error voltage.

[0071] It should be noted that a phase detector, also known as a phase comparator, is a device that can identify the phase difference of an input signal. It is a circuit that establishes a definite relationship between the output voltage and the phase difference between two input signals. Its function is to detect the phase difference between the input signals and convert the detected phase difference signal into a voltage signal for output. This signal is then filtered by a low-pass filter to form the control voltage of the voltage-controlled oscillator, which controls the frequency of the oscillator's output signal.

[0072] It is understood that the phase detector detects the phase difference between the reference signal and the frequency modulation signal, and converts the detected phase difference signal into a voltage signal for output to obtain the error voltage.

[0073] Step S40: Input the error voltage into the loop filter for filtering to obtain the average voltage.

[0074] It should be noted that the loop filter is a linear low-pass filter used to attenuate rapidly changing phase errors caused by input signal noise and to smooth high-frequency components leaked from the phase detector. In other words, it filters out high-frequency components and noise from the output voltage to allow for accurate estimation of the original signal at its output. The order and noise bandwidth of the loop filter determine its dynamic response to the signal. It can be understood that by filtering out high-frequency components and noise from the error voltage using the loop filter, the filtered error voltage is used as the average voltage.

[0075] In practical implementation, the average voltage, which is the control voltage of the voltage-controlled oscillator after filtering, is used to control the frequency of the oscillator output signal.

[0076] Step S50: Input the average voltage to the voltage-controlled oscillator for oscillation to obtain the target frequency modulation signal.

[0077] It is understandable that a voltage-controlled oscillator (VCO) is an electronic oscillation circuit design that uses voltage input to control the oscillation frequency. The oscillation frequency changes with different voltages. Therefore, by inputting an average voltage into the VCO, the oscillation frequency of the VCO, i.e., the frequency of the signal to be adjusted, can be adjusted by regulating the average voltage.

[0078] Step S60: Input the target frequency modulation signal into the voltage-controlled attenuator for adjustment to obtain the target output power.

[0079] It should be noted that an attenuator is a circuit used to introduce a predetermined attenuation within a specified frequency range. It is generally indicated by the decibels of attenuation introduced and the ohms of its characteristic impedance. Attenuators can be mainly divided into passive attenuators and active attenuators. Passive attenuators can be further divided into fixed attenuators and adjustable attenuators, while active attenuators are generally used in conjunction with thermal elements to form variable attenuators.

[0080] Understandably, a voltage-controlled attenuator attenuates a high voltage signal to a certain ratio, generally referring to power attenuation, to achieve a safe or ideal voltage level.

[0081] This embodiment adjusts the initial frequency modulation signal based on the reference signal to obtain the target frequency modulation signal with the target output power. It solves the technical problems of traditional microwave power sources in the prior art, which cannot achieve a wide range of adjustable frequency and power, are easily affected by factors such as temperature, and are large in size, which can easily lead to various unforeseen problems. It can adjust the frequency and output power separately and has the advantages of convenient debugging, small size, high frequency accuracy, good power flatness, low operating voltage, high efficiency, long life and high reliability.

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

[0083] Based on the first embodiment described above, step S30 in the microwave signal conditioning method of this embodiment includes:

[0084] Step S301: The reference voltage and the frequency modulation voltage are input to the phase detector for comparison to obtain a phase detection signal. The phase of the phase detection signal is proportional to the phase difference between the reference signal and the frequency-modulated signal after frequency division.

[0085] It should be noted that the phase of the phase detection signal is proportional to the phase difference between the reference signal and the frequency-modulated signal after frequency division.

[0086] Understandably, the phase detector detects the phase difference between the reference signal and the frequency-modulated signal after frequency division to obtain the phase detection signal.

[0087] Step S302: Based on the phase of the phase detection signal, obtain the phase difference between the reference signal and the frequency-modulated signal after frequency division.

[0088] It is understood that the phase of the phase detection signal is proportional to the phase difference between the reference signal and the frequency-modulated signal after frequency division. Based on the correspondence between the phase of the phase detection signal and the phase difference between the reference signal and the frequency-modulated signal after frequency division, the phase difference between the reference signal and the frequency-modulated signal after frequency division is calculated.

[0089] Step S303: Obtain the error voltage based on the phase difference between the reference signal and the frequency-modulated signal after frequency division.

[0090] It is understood that the phase detector converts the phase difference between the reference signal and the frequency-modulated signal after frequency division into a voltage signal output, namely the error voltage. The error voltage is filtered by a low-pass filter to form the control voltage of the voltage-controlled oscillator, thereby controlling the frequency of the oscillator output signal.

[0091] Furthermore, in order to achieve frequency adjustment, after inputting the error voltage to the loop filter for filtering and obtaining the average voltage, the method further includes: adjusting the average voltage so that the average voltage changes in the direction of reducing the difference between the frequency of the initial frequency modulation signal output by the voltage-controlled oscillator and the frequency of the reference signal, until the frequency of the initial frequency modulation signal and the frequency of the reference signal are consistent.

[0092] It is understandable that the average voltage, which is the control voltage of the voltage-controlled oscillator after filtering, is used to control the frequency of the oscillator's output signal. The output frequency can be adjusted by adjusting the average voltage.

[0093] This embodiment obtains the phase difference between the reference voltage and the frequency modulation voltage through a phase detector, converts the phase difference into an error voltage, and filters it to obtain the control voltage of the voltage-controlled oscillator, i.e., the average voltage. This allows for control of the frequency of the oscillator output signal, enabling separate adjustment of frequency and output power. The process is convenient and has high frequency accuracy.

[0094] refer to Figure 4 , Figure 4 This is a flowchart illustrating the third embodiment of the microwave signal modulation method of the present invention.

[0095] Based on the first embodiment described above, step S60 in the microwave signal conditioning method of this embodiment includes:

[0096] Step S601: Determine the target output power, determine the output frequency and output period based on the target output power, and determine the pulse period based on the output period.

[0097] It should be noted that output power is defined as the energy provided by an energy source or device to the outside world per unit time. Output power is also called nominal output power, which refers to the maximum output power that the appliance can output for a long time without distortion. Maximum power, on the other hand, refers to the maximum instantaneous power without damaging the appliance, which is the maximum load capacity that the appliance can withstand.

[0098] It is worth noting that a pulse usually refers to a brief, fluctuating electrical impulse (voltage or current) that resembles a heartbeat, which is frequently used in electronics. Its main characteristics include waveform, amplitude, width, and repetition frequency. A pulse is a signal that occurs for a short period of time within the entire signal cycle, relative to a continuous signal. There is no signal for most of the signal cycle, just like a human pulse. Now it generally refers to digital signals, which have a signal for half of the time within a cycle.

[0099] It is understood that the target output power is the power that the frequency modulation signal needs to be output after adjustment.

[0100] In a specific implementation, the output period is calculated based on the correspondence between the target output power, output frequency, and output period. The output period is consistent with the period of the pulse, thereby obtaining the pulse period.

[0101] Step S602: Convert the digital value of the target output power into a pulse duty cycle to obtain the target PWM pulse.

[0102] It should be noted that PWM stands for Pulse Width Modulation. A PWM pulse is a digital signal with a fixed period and a variable duty cycle.

[0103] It is worth noting that duty cycle refers to the proportion of the on-time relative to the total time within a pulse cycle. For example, the duty cycle of a pulse sequence with a pulse width of 1s and a signal period of 4s is 0.25.

[0104] Step S603: Input the PWM pulse to a low-pass filter for demodulation to obtain an analog voltage signal.

[0105] It should be noted that a low-pass filter is an electronic filter that allows signals below the cutoff frequency to pass through, but prevents signals above the cutoff frequency from passing through. Low-pass filtering is a filtering method in which low-frequency signals can pass through normally, while high-frequency signals exceeding a set threshold are blocked or weakened. However, the extent of blocking or weakening will vary depending on the frequency and the purpose of filtering.

[0106] It is understandable that after the PWM pulse is low-pass filtered, an analog voltage signal proportional to the width of the PWM pulse is obtained.

[0107] Step S604: Input the analog voltage corresponding to the analog voltage signal to the control terminal of the voltage-controlled attenuator. By adjusting the analog voltage, the voltage-controlled attenuator controls the target frequency modulation signal to attenuate to different degrees, thereby obtaining the target output power.

[0108] It is understood that by adjusting the analog voltage, the voltage-controlled attenuator controls the target frequency modulation signal to attenuate to different degrees, thereby adjusting the output power of the target frequency modulation signal until the target output power is obtained.

[0109] Further, to improve the conversion speed, step S602 includes: obtaining the number of bits or word length of the count value of the timer for the pulse duty cycle as a counting threshold; using the halved value of the counting threshold as an initial probe value, and using the halved value of the remaining value after halving the counting threshold as an initial increment; comparing the initial probe value with the digital value of the target output power, and determining the magnitude of the initial probe value and the digital value of the target output power; if the initial probe value is less than the digital value of the target output power, then retaining the initial probe value as a reserved value, and obtaining the sum of the initial increment and the reserved value as a new initial probe value, and counting to obtain a count value; determining whether the count value exceeds the maximum count value; if it exceeds, then using the last new initial probe value as the target probe value; converting the target probe value into a PWM pulse to obtain a target PWM pulse.

[0110] It should be noted that the PWM signal conversion rate is related to the resolution and the period of the selected PWM signal. The higher the resolution, the longer the conversion time. The resolution depends on the number of bits or word length of the timer that controls the duty cycle of the PWM pulse. Therefore, the resolution can be changed by changing the number of bits of the timer count, thereby increasing the conversion speed.

[0111] Understandably, by using a successive approximation bisectional trial method, the trial value can quickly approach the digital value of the target output power, and the final trial value is converted into a PWM pulse to obtain the target PWM pulse.

[0112] Furthermore, after comparing the initial trial value with the digital value of the target output power and determining the magnitude of the initial trial value and the digital value of the target output power, the method further includes: if the initial trial value is greater than or equal to the digital value of the target output power, then removing the initial trial value, taking the remaining value as a new increment, and obtaining the sum of the new increment and the previously retained value as a new initial trial value, and counting to obtain a count value.

[0113] Understandably, the digital value of the target output power is continuously probed until the number of probes is equivalent to the resolution.

[0114] This embodiment converts the digital value of the target output power into a target PWM pulse, demodulates the target PWM pulse to obtain an analog voltage signal, and adjusts the analog voltage to attenuate the target frequency modulation signal to different degrees, thereby adjusting the output power of the target frequency modulation signal until the target output power is obtained. This achieves separate adjustment of frequency and output power, and has advantages such as good power flatness, low operating voltage, high efficiency, long life and high reliability.

[0115] Reference Figure 5 , Figure 5 This is a structural block diagram of the first embodiment of the microwave signal conditioning device of the present invention.

[0116] like Figure 5 As shown, the microwave signal conditioning device proposed in this embodiment of the invention includes:

[0117] The first signal acquisition module 10 is used to acquire the reference signal output by the microwave source and obtain the reference voltage based on the reference signal;

[0118] The second signal acquisition module 20 is used to acquire the initial frequency modulation signal output by the voltage-controlled oscillator and obtain the frequency modulation voltage based on the initial frequency modulation signal;

[0119] Voltage comparison module 30 is used to compare the reference voltage with the frequency modulation voltage input to the phase detector to obtain the error voltage;

[0120] Filtering module 40 is used to input the error voltage to the loop filter for filtering to obtain the average voltage;

[0121] The oscillation module 50 is used to input the average voltage to the voltage-controlled oscillator for oscillation to obtain the target frequency modulation signal;

[0122] The power adjustment module 60 is used to input the target frequency modulation signal to the voltage-controlled attenuator for adjustment to obtain the target output power.

[0123] In one embodiment, the second signal acquisition module 20 is further configured to acquire the initial frequency modulation signal output by the voltage-controlled oscillator, and divide the initial frequency modulation signal by a prescaler to obtain the frequency-divided frequency modulation signal; and obtain the frequency modulation voltage based on the frequency-divided frequency modulation signal.

[0124] In one embodiment, the voltage comparison module 30 is further configured to compare the reference voltage with the frequency-modulated voltage input to a phase detector to obtain a phase detection signal, wherein the phase of the phase detection signal is proportional to the phase difference between the reference signal and the frequency-modulated signal after frequency division; based on the phase of the phase detection signal, the phase difference between the reference signal and the frequency-modulated signal after frequency division is obtained; and based on the phase difference between the reference signal and the frequency-modulated signal after frequency division, an error voltage is obtained.

[0125] In one embodiment, the power adjustment module 60 is further configured to determine a target output power, determine an output frequency and output period based on the target output power, determine the pulse period based on the output period, convert the digital value of the target output power into a pulse duty cycle to obtain a target PWM pulse, input the PWM pulse to a low-pass filter for demodulation to obtain an analog voltage signal, input the analog voltage corresponding to the analog voltage signal to the control terminal of the voltage-controlled attenuator, and adjust the analog voltage so that the voltage-controlled attenuator controls the target frequency modulation signal to attenuate to different degrees to obtain the target output power.

[0126] Furthermore, to achieve the above objectives, the present invention also proposes a microwave signal conditioning device, which includes: a memory, a processor, and a microwave signal conditioning program stored in the memory and executable on the processor, wherein the microwave signal conditioning program is configured to implement the steps of the microwave signal conditioning method described above.

[0127] Since this microwave signal conditioning 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.

[0128] Furthermore, this embodiment of the invention also proposes a storage medium storing a microwave signal conditioning program, which, when executed by a processor, implements the steps of the microwave signal conditioning method described above.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] In addition, for technical details not described in detail in this embodiment, please refer to the microwave signal modulation method provided in any embodiment of the present invention, which will not be repeated here.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A microwave signal modulation method, characterized in that, The method includes: Obtain the reference signal output by the microwave source, and obtain the reference voltage based on the reference signal; Obtain the initial frequency modulation signal output by the voltage-controlled oscillator, and obtain the frequency modulation voltage based on the initial frequency modulation signal; The reference voltage and the frequency-modulated voltage are input to a phase detector for comparison to obtain the error voltage; The error voltage is input to a loop filter for filtering to obtain the average voltage. The average voltage is input to the voltage-controlled oscillator for oscillation to obtain the target frequency modulation signal; The target frequency modulation signal is input to a voltage-controlled attenuator for adjustment to obtain the target output power; The step of inputting the target frequency modulation signal to a voltage-controlled attenuator for adjustment to obtain the target output power includes: Determine the target output power, determine the output frequency and output period based on the target output power, and determine the pulse period based on the output period; The digital value of the target output power is converted into a pulse duty cycle to obtain the target PWM pulse; The PWM pulse is input to a low-pass filter for demodulation to obtain an analog voltage signal; The analog voltage corresponding to the analog voltage signal is input to the control terminal of the voltage-controlled attenuator. By adjusting the analog voltage, the voltage-controlled attenuator controls the target frequency modulation signal to attenuate to different degrees, thereby obtaining the target output power.

2. The method as described in claim 1, characterized in that, The process of acquiring the initial frequency modulation signal output by the voltage-controlled oscillator and obtaining the frequency modulation voltage based on the initial frequency modulation signal includes: The initial frequency modulation signal output by the voltage-controlled oscillator is obtained, and the initial frequency modulation signal is divided by a prescaler to obtain the frequency-divided frequency modulation signal. The frequency modulation voltage is obtained from the frequency-modulated signal after frequency division.

3. The method as described in claim 2, characterized in that, The step of comparing the reference voltage with the frequency-modulated voltage input to the phase detector to obtain the error voltage includes: The reference voltage and the frequency-modulated voltage are input to a phase detector for comparison to obtain a phase detection signal. The phase of the phase detection signal is proportional to the phase difference between the reference signal and the frequency-modulated signal after frequency division. Based on the phase of the phase detection signal, the phase difference between the reference signal and the frequency-modulated signal after frequency division is obtained; The error voltage is obtained based on the phase difference between the reference signal and the frequency-modulated signal after frequency division.

4. The method as described in claim 1, characterized in that, After inputting the error voltage to the loop filter for filtering to obtain the average voltage, the method further includes: The average voltage is adjusted so that it changes in the direction of reducing the difference between the frequency of the initial frequency modulation signal output by the voltage-controlled oscillator and the frequency of the reference signal, until the frequency of the initial frequency modulation signal and the frequency of the reference signal are the same.

5. The method as described in claim 4, characterized in that, The step of converting the digital value of the target output power into a pulse duty cycle to obtain the target PWM pulse includes: The count value of the timer that obtains the pulse duty cycle is determined by the number of bits or the word length, which is used as the counting threshold. The bisection of the counting threshold is used as the initial trial value, and the bisection of the remaining value after the counting threshold is bisected is used as the initial increment; The initial trial value is compared with the digital value of the target output power, and the magnitude of the initial trial value and the digital value of the target output power is determined. If the initial trial value is less than the digital value of the target output power, then the initial trial value is retained and used as the retained value. The sum of the initial increment and the retained value is obtained as the new initial trial value, and a count is performed to obtain the count value. Determine whether the count value exceeds the maximum count value; If it exceeds the limit, the last new initial trial value will be used as the target trial value. The target probe value is converted into a PWM pulse to obtain the target PWM pulse.

6. The method as described in claim 5, characterized in that, After comparing the initial probe value with the digital value of the target output power and determining the magnitude of the initial probe value and the digital value of the target output power, the method further includes: If the initial trial value is greater than or equal to the target output power, the initial trial value is removed, the remaining value is recalculated and used as a new increment, and the sum of the new increment and the previously retained value is obtained as a new initial trial value. Counting is then performed to obtain the count value.

7. A microwave signal conditioning device, characterized in that, The device includes: The first signal acquisition module is used to acquire the reference signal output by the microwave source and obtain the reference voltage based on the reference signal; The second signal acquisition module is used to acquire the initial frequency modulation signal output by the voltage-controlled oscillator and obtain the frequency modulation voltage based on the initial frequency modulation signal; A voltage comparison module is used to compare the reference voltage with the frequency modulation voltage input to a phase detector to obtain an error voltage; The filtering module is used to input the error voltage to the loop filter for filtering to obtain the average voltage; An oscillation module is used to input the average voltage to the voltage-controlled oscillator for oscillation to obtain a target frequency modulation signal; The power adjustment module is used to input the target frequency modulation signal to the voltage-controlled attenuator for adjustment to obtain the target output power; Specifically, the power adjustment module is used to determine the target output power, determine the output frequency and output period based on the target output power, and determine the pulse period based on the output period; convert the digital value of the target output power into a pulse duty cycle to obtain a target PWM pulse; input the PWM pulse to a low-pass filter for demodulation to obtain an analog voltage signal; input the analog voltage corresponding to the analog voltage signal to the control terminal of the voltage-controlled attenuator, and adjust the analog voltage so that the voltage-controlled attenuator controls the target frequency modulation signal to attenuate to different degrees to obtain the target output power.

8. A microwave signal conditioning device, characterized in that, The microwave signal conditioning device includes: a memory, a processor, and a microwave signal conditioning program stored in the memory and executable on the processor, the microwave signal conditioning program being configured to implement the microwave signal conditioning method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium stores a microwave signal conditioning program, which, when executed by a processor, implements the microwave signal conditioning method as described in any one of claims 1 to 6.

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