Microwave power source, control method, control device and controller

Abstract

The present application relates to a microwave power source, a control method, a control device, and a controller. The microwave power source among them includes a controller and signal generators respectively connected to each signal processing branch in one-to-one correspondence; each signal generator is connected to the controller; the controller transmits corresponding frequency configuration signals to each signal generator respectively; the signal generator outputs microwave signals of corresponding frequencies to the signal processing branch according to the frequency configuration signals. Based on the one-to-one correspondence connection between each signal generator and each signal processing branch, it is possible to realize that each signal generator outputs microwave signals of different frequencies to the signal processing branches connected in one-to-one correspondence, and each signal generator is connected to the controller and can be respectively controlled by the controller, so that the frequencies of the microwave signals output by each signal generator to the signal processing branch can be arbitrarily configured. Furthermore, the operating frequencies of each signal processing branch can be arbitrarily configured, thereby realizing arbitrary combinations of multiple branches and multiple frequencies, diversifying the operating frequency points, and improving the selectivity of the operating frequency.

Description

Technical Field

[0001] The present application relates to the technical field of microwave applications, and particularly to a microwave power source, a control method, a control device, and a controller. Background Art

[0002] With the development of microwave application technology, a technology using a magnetron to emit microwaves has emerged. Due to many deficiencies such as low thermal efficiency, poor thermal uniformity, uncontrollable power, non-tunable frequency, rich spectral spurs, and short lifespan, traditional magnetrons have gradually withdrawn from the historical stage. Instead, solid-state microwave sources have emerged. Solid-state microwave sources have well solved many defects of magnetrons and also improved the flexibility of microwave heating systems. Currently, a microwave power source is used to drive a microwave solid-state power amplifier in a solid-state microwave source.

[0003] In the implementation process, the inventors found that there are at least the following problems in the traditional technology: The operating frequency points of traditional microwave power sources are single, and the selectivity of operating frequencies is poor. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a microwave power source, a control method, a control device, and a controller that can increase the operating frequency points and improve the selectivity of operating frequencies.

[0005] To achieve the above object, on the one hand, an embodiment of the present invention provides a microwave power source, including a controller and signal generators respectively connected to each signal processing branch in one-to-one correspondence; each signal generator is connected to the controller;

[0006] The controller transmits corresponding frequency configuration signals to each signal generator respectively;

[0007] The signal generator outputs a microwave signal with a corresponding frequency to the signal processing branch according to the frequency configuration signal.

[0008] In one embodiment, the signal generator is a phase-locked source.

[0009] In one embodiment, a crystal oscillator is further included; the crystal oscillator is connected to each phase-locked source.

[0010] In one embodiment, the phase-locked source includes a data terminal and a chip select terminal;

[0011] When the phase-locked source receives a chip select signal transmitted by the controller through the chip select terminal, it enables the data terminal for receiving the frequency configuration signal.

[0012] In one embodiment, the signal processing branch includes a pulse modulator, an electronically tunable attenuator, and an electronically tunable phase shifter;

[0013] A pulse modulator, an electrically tunable attenuator, and an electrically tunable phase shifter are connected in series between the signal input end and the signal output end of the signal processing branch;

[0014] Each pulse modulator, each electrically tunable attenuator, and each electrically tunable phase shifter are respectively connected to a controller.

[0015] In one embodiment, the signal processing branch further includes a preamplifier;

[0016] The pulse modulator, the electrically tunable attenuator, the electrically tunable phase shifter, and the preamplifier are connected in series between the signal input end and the signal output end.

[0017] In one embodiment, the preamplifier is connected to the signal output end.

[0018] In one embodiment, the electrically tunable attenuator includes a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, a first diode, and a second diode;

[0019] One end of the first resistor is connected to the positive electrode of the first diode and grounded through the first capacitor, and the other end is used to connect to a power supply;

[0020] The negative electrode of the first diode is respectively connected to one end of the third capacitor, the negative electrode of the second diode, and grounded through the third resistor;

[0021] The positive electrode of the second diode is respectively connected to one end of the second capacitor and one end of the second resistor;

[0022] The other end of the second resistor is connected to the controller;

[0023] The other ends of the second capacitor and the third capacitor are the two ends where the electrically tunable attenuator is connected to the signal processing branch.

[0024] In one embodiment, the pulse modulator includes a control switch and a radio frequency switch;

[0025] The two ends of the radio frequency switch are the two ends where the pulse modulator is connected to the signal processing branch;

[0026] The controller transmits a pulse modulation signal to the radio frequency switch through the control switch; the radio frequency switch connects or disconnects the signal processing branch according to the pulse modulation signal.

[0027] On the other hand, an embodiment of the present invention further provides a control method for a microwave power source, including:

[0028] Transmitting corresponding frequency configuration signals to each signal generator respectively;

[0029] The frequency configuration signal is used to instruct the signal generator to output a microwave signal with a corresponding frequency to the signal processing branch.

[0030] A control device for a microwave power source, comprising:

[0031] A frequency configuration module for transmitting corresponding frequency configuration signals to each signal generator respectively;

[0032] The frequency configuration signal is used to instruct the signal generator to output microwave signals of corresponding frequencies to the signal processing branch.

[0033] A controller for executing the steps of the above-mentioned control method of the microwave power source.

[0034] A computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned control method of the microwave power source are realized.

[0035] One of the above technical solutions has the following advantages and beneficial effects:

[0036] Based on the one-to-one correspondence connection between each signal generator and each signal processing branch, it is possible to realize that each signal generator outputs microwave signals of different frequencies to the corresponding signal processing branches, and each signal generator is connected to the controller and can be controlled by the controller respectively, so that the frequencies of the microwave signals output by each signal generator to the signal processing branch can be arbitrarily configured. Furthermore, the operating frequencies of each signal processing branch can be arbitrarily configured, thereby realizing arbitrary combinations of multiple branches and multiple frequencies, diversifying the operating frequency points, and improving the selectivity of the operating frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Through the more specific description of the preferred embodiments of the present application shown in the drawings, the above and other objects, features and advantages of the present application will become clearer. The same reference numerals indicate the same parts in all the drawings, and the drawings are not deliberately drawn to scale in actual size, and the focus is on showing the gist of the present application.

[0038] Figure 1 It is the first application environment diagram of the microwave power source in an embodiment;

[0039] Figure 2 It is the second application environment diagram of the microwave power source in an embodiment;

[0040] Figure 3 It is the first structural block diagram of the microwave power source in an embodiment;

[0041] Figure 4 It is the second structural block diagram of the microwave power source in an embodiment;

[0042] Figure 5 It is the structural block diagram of the phase-locked source, crystal oscillator, controller and the connection relationship among the three in an embodiment;

[0043] Figure 6 is the circuit diagram of the electronic tunable attenuator in an embodiment;

[0044] Figure 7 is the structural block diagram of the pulse modulator in an embodiment;

[0045] Figure 8 is the schematic flowchart of the control method of the microwave power source in an embodiment;

[0046] Figure 9 is the structural block diagram of the control device of the microwave power source in an embodiment;

[0047] Figure 10 is the internal structure diagram of the controller in an embodiment. Detailed implementation manners

[0048] For the convenience of understanding the present application, the present application will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0049] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated with it, or there may be an intermediate element at the same time. The terms "one end", "the other end", "connected", "connected in series", "both ends" and similar expressions used herein are for illustrative purposes only.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0051] Implementing a microwave source that meets industrial applications or daily applications is a prerequisite for generating microwaves required for industry and daily life, that is, generating microwaves according to needs. In traditional technologies, magnetrons are usually used to generate microwaves. The microwave source based on a magnetron includes parts such as a power supply, a magnetron, a control circuit, and a resonant cavity. The power supply outputs voltage to the magnetron, the magnetron oscillates to generate microwaves, and then the microwaves are output through the waveguide system.

[0052] In the traditional technology, limited by the working principle of the magnetron, the magnetron must work under high voltage drive (for example, the working voltage of some magnetrons is as high as 4000 volts). This makes it necessary to construct a high-voltage power supply in the microwave source based on the magnetron. As a result, the microwave source has a complex structure, a large volume, and potential electrical safety hazards. The solid-state microwave source has well solved many defects of the magnetron and also improved the flexibility of the microwave heating system. Currently, a microwave power source is used to drive the microwave solid-state power amplifier in the solid-state microwave source.

[0053] In the microwave heating system, the heating uniformity and thermal efficiency of a single power source are relatively limited because the electric field distribution of the single-point feed in the cavity is extremely uneven, which easily leads to uneven heating of the object to be heated in the cavity and thus low thermal efficiency. Even if multi-point feeding is achieved by outputting microwave signals through multiple branches, due to the single working frequency point and poor selectivity of the working frequency, problems such as uneven heating and low thermal efficiency are also likely to occur.

[0054] This application adopts a method of arbitrarily combining multiple branches and multiple frequencies, increasing the working frequency points, improving the selectivity of the working frequency, and at the same time indirectly making up for the defect of uneven distribution of the electric field in the microwave heating system, thereby effectively improving the thermal uniformity and thermal efficiency.

[0055] The microwave power source provided by this application can be applied to, for example, Figure 1 or Figure 2 the application environments shown. Among them, as Figure 1 shown, the microwave power source 102, each microwave solid-state amplifier 104, and each antenna 106 are connected in sequence one by one. After the microwave signal output by the microwave power source 102 is amplified by the microwave solid-state amplifier 104, it is transmitted through the antenna 106;

[0056] As Figure 2 shown, the microwave power source 102 and each microwave solid-state amplifier 104 are connected one by one; after the microwave signal output by the microwave power source 102 is amplified by the microwave solid-state amplifier 104, it is first combined by the combiner 108 and then transmitted through the antenna 106;

[0057] Figure 1 and Figure 2 Both of the two application environments in can be used to realize functions such as microwave heating, microwave extraction, and plasma excitation.

[0058] In one embodiment, as Figure 3 shown, a microwave power source is provided. Taking the application of this microwave power source in the Figure 1 or Figure 2 application environment as an example for description, it includes a controller 302 and each signal generator 304 that are connected to each signal processing branch 306 one by one; each signal generator 304 is connected to the controller 302;

[0059] The controller 302 transmits corresponding frequency configuration signals to each signal generator 304 respectively;

[0060] According to the frequency configuration signals, the signal generator 304 outputs microwave signals with corresponding frequencies to the signal processing branch 306.

[0061] Among them, the controller 302 can be, but is not limited to, various single-chip microcomputers, digital signal processors (DSPs), FPGAs (Field-Programmable Gate Arrays), CPLDs (Complex Programmable Logic Devices), etc. Further, the controller 302 is a microprocessor; specifically, the DAC (Digital to analog converter) conversion accuracy of the controller 302 can be above 8 bits, and it can be configured with an SPI (Serial Peripheral Interface) interface or an analog SPI interface for connecting peripheral devices such as the signal generator 304.

[0062] The signal generator 304 can be a microwave signal generator 304, and the frequencies of the microwave signals it can output can cover at least three microwave heating frequency bands of 433 MHz (Mega Hertz), 915 MHz, and 2450 MHz.

[0063] The number of signal generators 304 can be four, and correspondingly, the number of signal processing branches 306 can also be four.

[0064] Specifically, the signal processing branch 306 can perform processing such as modulation, amplitude modulation, and phase modulation on the microwave signals.

[0065] In a specific embodiment, the signal generator 304 is a phase-locked source (microwave phase-locked signal source), and it outputs a CW (Continuous Wave) signal as the microwave signal.

[0066] It should be noted that the signal output end of the signal processing branch 306 is connected to Figure 1 and Figure 2 the microwave solid-state amplifier in Figure 1 and Figure 2 the microwave solid-state amplifier in

[0067] The working process of the above microwave power source is as follows:

[0068] The controller 302 transmits corresponding frequency configuration signals to each signal generator 304 according to actual needs;

[0069] When applied to a microwave heating system, the above-mentioned actual needs can be determined according to the design requirements of the microwave heating system. The above-mentioned design requirements can include the internal space size, dimensions, antenna port position of the heating cavity, and the type of food to be heated; the above-mentioned actual needs can also be determined according to the reflection coefficients of different foods. Since microwave energy is only absorbed by polar molecules (mainly water molecules), and the water content and the distribution of water molecules in each food are different, the electrical characteristics exhibited by the food as a load of microwave energy are different, that is, the reflection coefficients of different foods are different. Thus, the food can be classified by detecting the reflection coefficient of the load (the oven cavity with food placed in it) to determine the type of food, and then determine the actual demand;

[0070] It should be noted that the optimal operating frequency point under the load reflection coefficient will change with heating. For example, the optimal operating frequency point is 2450 MHz before starting, 2460 MHz when heating to half, and 2470 MHz at the end of heating.

[0071] Each signal generator 304 outputs microwave signals of corresponding frequencies to the signal processing branch 306 according to the received frequency configuration signals;

[0072] After the microwave signals pass through the signal processing branch 306, they can be used to drive a microwave solid-state amplifier. Specifically, Figure 2 taking it as an example, it can be used to drive 4 microwave solid-state amplifiers of 250 W (Watt) to combine the paths. After combining the paths, the output power can reach 1 kW (kilo Watt), which can be used in large industrial microwave heating equipment.

[0073] In the above-mentioned microwave power source, based on the one-to-one correspondence connection between each signal generator 304 and each signal processing branch 306, each signal generator 304 can output microwave signals of different frequencies to the corresponding signal processing branches 306 connected one by one. Moreover, each signal generator 304 is connected to the controller 302 and can be respectively controlled by the controller 302, so that the frequencies of the microwave signals output by each signal generator 304 to the signal processing branch 306 can be arbitrarily configured. Furthermore, the operating frequencies of each signal processing branch 306 can be arbitrarily configured, thus realizing the arbitrary combination of multiple branches and multiple frequencies, diversifying the operating frequency points, and improving the selectivity of the operating frequency.

[0074] Specifically, for a microwave heating system applying the above-mentioned microwave power source, the realization of multiple branches and multiple frequencies can improve the heating flexibility of the microwave heating system, facilitate the improvement of the thermal efficiency and thermal uniformity, and achieve the effects of environmental protection, energy conservation and emission reduction.

[0075] In one embodiment, as Figure 4 shown, a microwave power source is provided. Taking the application environment in Figure 1 and Figure 2 as an example for illustration, it includes: a controller 302 and signal generators 304 respectively connected to each signal processing branch (constituted by a pulse modulator 402, an electrically tunable attenuator 404, an electrically tunable phase shifter 406, and a preamplifier 408 in Figure 4 ); each signal generator 304 is connected to the controller 302;

[0076] The signal processing branch includes a pulse modulator 402, an electrically tunable attenuator 404, an electrically tunable phase shifter 406, and a preamplifier 408;

[0077] The pulse modulator 402, the electrically tunable attenuator 404, the electrically tunable phase shifter 406, and the preamplifier 408 are connected in series between the signal input end and the signal output end of the signal processing branch, and the connection order among the pulse modulator 402, the electrically tunable attenuator 404, the electrically tunable phase shifter 406, and the preamplifier 408 is not limited;

[0078] Each pulse modulator 402, each electrically tunable attenuator 404, and each electrically tunable phase shifter 406 are respectively connected to the controller 302;

[0079] The controller 302 transmits corresponding frequency configuration signals to each signal generator 304 respectively;

[0080] The signal generator 304 outputs microwave signals with corresponding frequencies to the signal processing branch according to the frequency configuration signals.

[0081] The number of signal generators 304 can be four. Correspondingly, the number of signal processing branches can also be 4.

[0082] It should be noted that the electrically tunable phase shifter 406 can adjust the phase of the microwave signals in each signal processing branch, strengthen the isolation between each signal processing branch, and avoid mutual interference. Especially when applied to a microwave heating system, the magnetic field in the heating cavity of the microwave heating system is relatively rich, and the mutual interference is relatively serious. Moreover, microwave signals with different phases also ensure thermal uniformity.

[0083] In one specific embodiment, the signal generator 304 is a phase-locked source.

[0084] In one specific embodiment, as Figure 5As shown, it further includes a crystal oscillator 502; the crystal oscillator 502 is connected to each phase-locked source, which can synchronize the microwave signals output by each phase-locked source, avoid the difficulty in relative phase adjustment of each signal processing branch due to uncertain reference phase, and ensure that the microwave power source will not collapse during application.

[0085] Among them, the crystal oscillator 502 can be a TCXO (Temperature Compensate X'tal (crystal) Oscillator, temperature-compensated crystal oscillator).

[0086] In one specific embodiment, as Figure 5 shown, the phase-locked source includes a data terminal and a chip select terminal ( Figure 5 CS1, CS2, CS3, and CS4 in

[0087] When the phase-locked source receives the chip select signal transmitted by the controller 302 through the chip select terminal, it enables the data terminal for receiving the frequency configuration signal.

[0088] Among them, the controller 302 is connected to the chip select terminal and is connected to the data terminal through the SPI interface ( Figure 5 at the bidirectional arrow marked by SPI and the bidirectional arrow marked by the SPI bus in

[0089] Specifically, the controller 302 can use a high level as the chip select signal. When the controller 302 wants to configure the frequency of the microwave signal output by one of the phase-locked sources, it first transmits a high level to the chip select terminal of this phase-locked source, and then transmits the frequency configuration signal to the data terminal of this phase-locked source. The phase-locked source writes the frequency information in the frequency configuration signal into the corresponding register in the phase-locked source. It should be noted that when the controller 302 transmits a high level to the chip select terminal of this phase-locked source, it transmits a low level to the chip select terminals of the other phase-locked sources.

[0090] In one specific embodiment, the preamplifier 408 is connected to the signal output terminal, that is to say, in the signal processing branch, the preamplifier 408 is arranged after the pulse modulator 402, the electronically tunable attenuator 404, and the electronically tunable phase shifter 406.

[0091] In one specific embodiment, as Figure 6 shown, the electronically tunable attenuator 404 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode D1, and a second diode D2;

[0092] One end of the first resistor R1 is connected to the positive electrode of the first diode D1 and is grounded to GND through the first capacitor C1, and the other end is used to connect to the power supply VCC;

[0093] The negative electrode of the first diode D1 is respectively connected to one end of the third capacitor C3, the negative electrode of the second diode D2, and grounded to GND through the third resistor R3;

[0094] The positive electrode of the second diode D2 is respectively connected to one end of the second capacitor C2 and one end of the second resistor R2;

[0095] The other end of the second resistor R2 is connected to the controller 302;

[0096] The other end of the second capacitor C2 and the other end of the third capacitor C3 are the two ends where the electrically tunable attenuator 404 is connected to the signal processing branch.

[0097] The above-mentioned electrically tunable attenuator 404 utilizes the voltage-resistance characteristics of the first diode D1 and the second diode D2, so that the first diode D1, the second diode D2 and the third resistor R3 form an electrically voltage-controlled attenuation network. By reasonably selecting the parameters of the circuit elements in the electrically tunable attenuator 404, the parameters of the power supply, and the control parameters of the interface where the controller 302 is connected to the second resistor R2, the adjustable range of the gain can reach more than 20 dB (deciBel), the gain flatness is 2 dB within the range of the signal frequency from 400 MHz to 3 GHz (Giga Hertz), and the input return loss S11 is less than -20 dB.

[0098] It should be further noted that the above-mentioned electrically tunable attenuator 404 is realized by connecting a small number of resistors, capacitors and diodes, and has a simple structure and low cost.

[0099] In one specific embodiment, as Figure 7 shown, the pulse modulator 402 includes a control switch 702 and a radio frequency switch 704;

[0100] The two ends of the radio frequency switch 704 are the two ends where the pulse modulator 402 is connected to the signal processing branch;

[0101] The controller 302 transmits a pulse modulation signal to the radio frequency switch 704 through the control switch 702; the radio frequency switch 704 connects or disconnects the signal processing branch according to the pulse modulation signal.

[0102] Among them, the pulse modulation signal is a PWM (Pulse Width Modulation) signal. When the duty cycle of the pulse modulation signal controlled by the controller 302 is 100%, the RF switch 704 is always connected to the signal processing branch, that is, the signal processing branch normally outputs a microwave signal (a CW signal with a constant envelope); when the duty cycle of the pulse modulation signal controlled by the controller 302 is 0%, the RF switch 704 is always disconnected from the signal processing branch, that is, the signal processing branch does not output a microwave signal; when the duty cycle of the pulse modulation signal controlled by the controller 302 is between 0% and 100%, the RF switch 704 periodically connects and disconnects the signal processing branch, that is, the signal processing branch outputs microwave signal pulses corresponding to the duty cycle. It should be further noted that by changing the frequency of the PWM signal (the reciprocal of the period T), the frequency of the microwave signal pulses can be changed. Since the frequency and duty cycle of the PWM signal are adjustable, for a microwave heating system using the above microwave power source, the flexibility of the microwave heating system is improved, which is convenient for the microwave heating system to treat different types of heating objects differently and make safety warning judgments for different types of heating objects.

[0103] The working process of the above microwave power source is as follows:

[0104] The controller 302 first transmits a chip select signal to the chip select terminal of the corresponding phase-locked source according to actual needs, and then transmits a frequency configuration signal to the data terminal of the corresponding phase-locked source;

[0105] When the phase-locked source receives the chip select signal transmitted by the controller 302 through the chip select terminal, it enables the data terminal for receiving the frequency configuration signal to be able to receive the frequency configuration signal;

[0106] The phase-locked source outputs a microwave signal with a corresponding frequency to the signal processing branch according to the frequency configuration signal;

[0107] After the microwave signal is subjected to pulse width modulation, amplitude modulation, phase shift, and pre-amplification processing through the pulse modulator 402, the electronically tunable attenuator 404, the electronically tunable phase shifter 406, and the pre-amplifier 408, it can drive the microwave solid-state amplifier;

[0108] The pulse modulator 402, the electronically tunable attenuator 404, and the electronically tunable phase shifter 406 are controlled by the controller 302. Therefore, the controller 302 can control the pulse modulator 402, the electronically tunable attenuator 404, and the electronically tunable phase shifter 406 respectively according to actual needs, and then perform pulse width modulation, amplitude modulation, and phase shift processing on the microwave signals on each signal processing branch, and output different microwave signals.

[0109] For the same features in this embodiment as those in the previous embodiment, please refer to the detailed description in the previous embodiment and will not be elaborated here.

[0110] In the above microwave power source, based on the one-to-one correspondence connection between each signal generator 304 and each signal processing branch 306, different-frequency microwave signals can be output from each signal generator 304 to the corresponding signal processing branches 306. Moreover, each signal generator 304 is connected to the controller 302 and can be controlled by the controller 302 respectively, so that the frequencies of the microwave signals output from each signal generator 304 to the signal processing branch 306 can be arbitrarily configured. Furthermore, the operating frequencies of each signal processing branch 306 can be arbitrarily configured, thus realizing the arbitrary combination of multiple branches and multiple frequencies, diversifying the operating frequency points, and improving the selectivity of the operating frequency;

[0111] The microwave signals on each signal processing branch can also be subjected to pulse width modulation, amplitude modulation, and phase shift processing through the pulse modulator 402, the electrically tunable attenuator 404, and the electrically tunable phase shifter 406, further improving the flexibility. For the microwave heating system applying the above microwave power source, it has good flexibility, can achieve the effect of adjusting the heat in Chinese cooking, and is also convenient for improving the thermal efficiency and thermal uniformity, achieving the effects of environmental protection, energy conservation, and emission reduction.

[0112] In one embodiment, as Figure 8 shown, a control method for a microwave power source is provided, including:

[0113] Step S802: Transmit corresponding frequency configuration signals to each signal generator respectively;

[0114] The frequency configuration signal is used to instruct the signal generator to output a microwave signal with a corresponding frequency to the signal processing branch.

[0115] In a specific example, the signal generator is a phase-locked source.

[0116] In a specific example, step S802 includes:

[0117] Transmit a chip select signal to the phase-locked source through the chip select terminal; transmit a frequency configuration signal to the phase-locked source through the data terminal;

[0118] The chip select signal is used to instruct the phase-locked source to enable the data terminal.

[0119] In a specific example, it further includes the step of:

[0120] Transmit a pulse modulation signal to the RF switch through the control switch; the pulse modulation signal is used to instruct the RF switch to connect or disconnect the signal processing branch.

[0121] It should be understood that although Figure 8The steps in the flowchart are shown in sequence according to the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise clearly stated in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 8 at least a part of the steps in

[0122] can include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps. Figure 9 In one embodiment, as

[0123] shown, a control device for a microwave power source is provided, including:

[0124] A frequency configuration module 902 for transmitting corresponding frequency configuration signals to each signal generator respectively;

[0125] The frequency configuration signal is used to instruct the signal generator to output a microwave signal with a corresponding frequency to the signal processing branch.

[0126] In a specific example, the signal generator is a phase-locked source.

[0127] In a specific example, the frequency configuration module 902 includes a chip select signal module and a frequency configuration signal module;

[0128] The chip select signal module is used to transmit a chip select signal to the phase-locked source through the chip select terminal; the chip select signal is used to instruct the phase-locked source to enable the data terminal;

[0129] The frequency configuration signal module is used to transmit a frequency configuration signal to the phase-locked source through the data terminal.

[0130] In a specific example, a pulse modulation module is further included;

[0131] The pulse modulation module is used to transmit a pulse modulation signal to the RF switch through a control switch; the pulse modulation signal is used to instruct the RF switch to connect or disconnect the signal processing branch.

[0132] In one embodiment, a controller is provided. The controller may be a terminal, and its internal structure diagram may be as shown in Figure 10 . The controller includes a processor, a memory, a network interface, a display screen, and an input device connected through a system bus. Among them, the processor of the controller is used to provide computing and control capabilities. The memory of the controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the controller is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a control method for a microwave power source. The display screen of the controller may be a liquid crystal display screen or an electronic ink display screen. The input device of the controller may be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the controller housing, or an external keyboard, touchpad, or mouse, etc.

[0133] Those skilled in the art can understand that Figure 10 the structure shown in is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the controller to which the solution of this application is applied. The specific controller may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0134] In one embodiment, a controller is provided, and the controller is used to perform the following steps:

[0135] Transmit corresponding frequency configuration signals to each signal generator respectively;

[0136] The frequency configuration signal is used to instruct the signal generator to output a microwave signal with a corresponding frequency to the signal processing branch.

[0137] In a specific example, the signal generator is a phase-locked source.

[0138] In a specific example, the step of transmitting corresponding frequency configuration signals to each signal generator respectively includes:

[0139] Transmit a chip select signal to the phase-locked source through the chip select terminal; transmit a frequency configuration signal to the phase-locked source through the data terminal;

[0140] The chip select signal is used to instruct the phase-locked source to enable the data terminal.

[0141] In a specific example, the controller is further used to perform the following steps:

[0142] Transmit a pulse modulation signal to the RF switch through a control switch; the pulse modulation signal is used to instruct the RF switch to connect or disconnect the signal processing branch.

[0143] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0144] Transmit corresponding frequency configuration signals to each signal generator respectively;

[0145] The frequency configuration signal is used to instruct the signal generator to output microwave signals with corresponding frequencies to the signal processing branch.

[0146] In a specific example, the signal generator is a phase-locked source.

[0147] In a specific example, the step of transmitting corresponding frequency configuration signals to each signal generator respectively includes:

[0148] Transmit a chip select signal to the phase-locked source through the chip select terminal; transmit the frequency configuration signal to the phase-locked source through the data terminal;

[0149] The chip select signal is used to instruct the phase-locked source to enable the data terminal.

[0150] In a specific example, when the computer program is executed by the processor, the following steps are further implemented:

[0151] Transmit a pulse modulation signal to the radio frequency switch through a control switch; the pulse modulation signal is used to instruct the radio frequency switch to connect or disconnect the signal processing branch.

[0152] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0153] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0154] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A microwave power source, characterized in that, It includes a controller and signal generators respectively connected to each signal processing branch in one-to-one correspondence; each of the signal generators is connected to the controller; The signal generator is a phase-locked source; the microwave power source further includes a crystal oscillator; the crystal oscillator is connected to each of the phase-locked sources; The signal processing branch includes a pulse modulator, an electrically tunable attenuator and an electrically tunable phase shifter; the pulse modulator, the electrically tunable attenuator and the electrically tunable phase shifter are connected in series between the signal input end and the signal output end of the signal processing branch; each of the pulse modulators, each of the electrically tunable attenuators and each of the electrically tunable phase shifters are respectively connected to the controller; The controller respectively transmits corresponding frequency configuration signals to each of the signal generators; The signal generator outputs microwave signals with corresponding frequencies to the signal processing branch according to the frequency configuration signal; The pulse modulator includes a control switch and a radio frequency switch; both ends of the radio frequency switch are the two ends where the pulse modulator is connected to the signal processing branch; the controller transmits a pulse modulation signal to the radio frequency switch through the control switch; the radio frequency switch connects or disconnects the signal processing branch according to the pulse modulation signal; wherein, the pulse modulation signal is a PWM signal; The electrically tunable attenuator includes a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, a first diode and a second diode; one end of the first resistor is connected to the positive electrode of the first diode and grounded through the first capacitor, and the other end is used for connecting to a power supply; the negative electrode of the first diode is respectively connected to one end of the third capacitor and the negative electrode of the second diode, and grounded through the third resistor; the positive electrode of the second diode is respectively connected to one end of the second capacitor and one end of the second resistor; the other end of the second resistor is connected to the controller; the other ends of the second capacitor and the third capacitor are the two ends where the electrically tunable attenuator is connected to the signal processing branch.

2. The microwave power source according to claim 1, wherein The phase-locked source includes a data terminal and a chip select terminal; When the phase-locked source receives the chip select signal transmitted by the controller through the chip select terminal, it enables the data terminal for receiving the frequency configuration signal.

3. The microwave power source according to claim 1, characterized in that, The signal processing branch further includes a preamplifier; The pulse modulator, the electrically tunable attenuator, the electrically tunable phase shifter and the preamplifier are connected in series between the signal input end and the signal output end.

4. The microwave power source according to claim 3, characterized in that, The preamplifier is connected to the signal output end.

5. A control method for a microwave power source, characterized in that, The microwave power source is the microwave power source according to any one of claims 1 to 4, and the method includes: Respectively transmitting corresponding frequency configuration signals to each of the signal generators; The frequency configuration signal is used to instruct the signal generator to output microwave signals with corresponding frequencies to the signal processing branch.

6. A control device for a microwave power source, characterized in that, The microwave power source is the microwave power source according to any one of claims 1 to 4, and the device includes: A frequency configuration module for respectively transmitting corresponding frequency configuration signals to each of the signal generators; The frequency configuration signal is used to instruct the signal generator to output microwave signals with corresponding frequencies to the signal processing branch.

7. A controller, characterized in that, The controller is configured to perform the steps of the control method described in claim 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer program, when executed by a processor, implements the steps of the control method described in claim 5.

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