CN105423363A - Microwave source system, microwave oven and execution method in microwave source system - Google Patents
Microwave source system, microwave oven and execution method in microwave source system Download PDFInfo
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- CN105423363A CN105423363A CN201610014044.9A CN201610014044A CN105423363A CN 105423363 A CN105423363 A CN 105423363A CN 201610014044 A CN201610014044 A CN 201610014044A CN 105423363 A CN105423363 A CN 105423363A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/686—Circuits comprising a signal generator and power amplifier, e.g. using solid state oscillators
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/687—Circuits for monitoring or control for cooking
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2214/00—Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
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- Electromagnetism (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Constitution Of High-Frequency Heating (AREA)
Abstract
The invention relates to the technical field of microwaves, and discloses a microwave source system, a microwave oven and an execution method in the microwave source system. The system comprises a frequency comprehensive unit, a power amplification unit and a control unit. The frequency comprehensive unit is used for generating radio frequency signals. The power amplification unit is connected with the frequency comprehensive unit and used for executing amplification operation on the radio frequency signals. The control unit is connected with the frequency comprehensive unit and the power amplification unit and used for controlling the frequency comprehensive unit to generate different radio frequency signals, determining the optimal frequency and the optimal phase position of the radio frequency signals on the basis of the output power, corresponding to the radio frequency signals, of the power amplification unit and the reflection power, corresponding to the radio frequency signals, of the power amplification unit, and controlling the frequency comprehensive unit to generate a radio frequency signal with the optimal frequency and the optimal phase. In this way, accurate control over the output power of the microwave oven can be achieved, and therefore the heating effect can be improved.
Description
Technical field
The present invention relates to microwave technical field, particularly, a kind of method relating to microwave source system, micro-wave oven and perform in microwave source system.
Background technology
The core component solid state microwave sources of Solid Source micro-wave oven (SSMWO), its research is comparatively deep, usual employing voltage controlled oscillator (VCO) is as microwave generator, and amplified step by step by pre-promotion, promotion, final stage etc., eventually through antenna by guided wave transformed space free wave, in feed-in microwave-oven-heating cavity.
Current Solid Source microwave source system adopts analog control voltage to control the frequency of respective VCO and power (also have and control power by controlling DC voltage), finally by antenna by microwave energy feed-in microwave heating chamber mostly.Be limited by semiconductor devices, existing solid state microwave stove power output is less, and power, frequency and phase place Adjustment precision are poor, and temperature stability is poor, heating uniformity and effect not ideal enough, application extension is poor.
Summary of the invention
A kind of method that the object of this invention is to provide microwave source system, micro-wave oven and perform in microwave source system, to solve above-mentioned the problems of the prior art.
To achieve these goals, the invention provides a kind of microwave source system, this system comprises frequency synthesis unit, power amplification unit and control unit, wherein: described frequency synthesis unit is for generation of radiofrequency signal; Described power amplification unit is connected with described frequency synthesis unit, for performing amplifieroperation to described radiofrequency signal; Described control unit is connected with described frequency synthesis unit and described power amplification unit, multiple different radiofrequency signal is produced for controlling described frequency synthesis unit, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place, and control described frequency synthesis unit and produce the radiofrequency signal with described optimum frequency and phase place.
Present invention also offers a kind of micro-wave oven, this micro-wave oven comprises above-mentioned microwave source system.
Present invention also offers the method implemented in microwave source system, wherein, described microwave source system comprises frequency synthesis unit, power amplification unit and control unit, the method comprises: utilize described control unit to control described frequency synthesis unit and produce multiple different radiofrequency signal, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place, wherein said multiple different radiofrequency signal is amplified by described power amplification unit; And utilize described control unit to control described frequency synthesis unit to produce there is the radiofrequency signal of described optimum frequency and phase place.
Pass through technique scheme, utilize the control unit of microwave source system to control described frequency synthesis unit and produce multiple different radiofrequency signal, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place, and control described frequency synthesis unit and produce the radiofrequency signal with described optimum frequency and phase place.Thus, due to the generation of frequency synthesis unit is the radiofrequency signal with optimum frequency and phase place, so this radiofrequency signal can obtain best power output after power amplifier amplifies, the accurate control to microwave oven output power can be realized, thus improve heating effect.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the block diagram of the microwave source system according to one embodiment of the present invention;
Fig. 2 is the block diagram of the microwave source system according to another embodiment of the present invention;
Fig. 3 is the block diagram of the microwave source system according to another embodiment of the present invention;
Fig. 4 is the block diagram of the microwave source system according to another embodiment of the present invention; And
Fig. 5 is the flow chart of the method implemented in microwave source system according to one embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the block diagram of the microwave source system according to one embodiment of the present invention.
As shown in Figure 1, frequency synthesis unit (FSU) 10, power amplification unit (PA) 20 and control unit (MCU) 30 is comprised, wherein: described frequency synthesis unit 10 is for generation of radiofrequency signal according to the microwave source system of one embodiment of the present invention; Described power amplification unit 20 is connected with described frequency synthesis unit 10, for performing amplifieroperation to described radiofrequency signal; Described control unit 30 is connected with described frequency synthesis unit 10 and described power amplification unit 20, multiple different radiofrequency signal is produced for controlling described frequency synthesis unit 10, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit 20 and the optimum frequency of reflection power determination radiofrequency signal and phase place, and control described frequency synthesis unit 10 and produce the radiofrequency signal with described optimum frequency and phase place.
Utilize the control unit of microwave source system to control described frequency synthesis unit and produce multiple different radiofrequency signal, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place, and control described frequency synthesis unit and produce the radiofrequency signal with described optimum frequency and phase place.Thus, due to the generation of frequency synthesis unit is the radiofrequency signal with optimum frequency and phase place, so this radiofrequency signal can obtain best power output after power amplifier amplifies, the accurate control to microwave oven output power can be realized, thus improve heating effect.
Wherein, when control unit 30 control described frequency synthesis unit 10 produce multiple different radiofrequency signal time, each radiofrequency signal through power amplification unit 20 amplify after can export the power output corresponding with this radiofrequency signal and reflection power.
According to one embodiment of the present invention, this system also comprises antenna and Wave guide unit (ANT) 40, is connected with described power amplification unit 20, is fed in microwave oven cavity for converting the radiofrequency signal after amplification to electromagnetic wave.
Thus, after described frequency synthesis unit 10 generation of control has the radiofrequency signal of described optimum frequency and phase place, the radiofrequency signal with optimum frequency and phase place produced will be fed in microwave oven cavity by antenna and Wave guide unit (ANT) 40 after power amplification unit 20 amplifies.
According to one embodiment of the present invention, described control unit 30 controls described frequency synthesis unit 10 and produces multiple different radiofrequency signal, comprises based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit 20 and the optimum frequency of reflection power determination radiofrequency signal and phase place:
Control described frequency synthesis unit 10 and produce the identical and radiofrequency signal that frequency is different of multiple phase place;
The power output that frequency is different radiofrequency signal is corresponding based on the identical from described multiple phase place of described power amplification unit 20 and reflection power calculate multiple first standing wave values of microwave oven cavity;
Using the frequency of radiofrequency signal corresponding for minimum standing wave value in described multiple first standing wave value as optimum frequency;
Control described frequency synthesis unit 10 to produce and multiplely there is optimum frequency and the different radiofrequency signal of phase place;
Multiple there is optimum frequency and power output corresponding to the different radiofrequency signal of phase place and reflection power calculate multiple second standing wave values of microwave oven cavity based on described power amplification unit 20 from described;
Using the phase place of radiofrequency signal corresponding for minimum standing wave value in described multiple second standing wave value as optimum phase.
Wherein, for the calculating of the first standing wave value and the second standing wave value, can adopt existing mode in prior art, the present invention repeats no more.
Alternatively, after determining optimum frequency, the function determining optimum phase can not be performed.Now, be different from described frequency synthesis unit 10 after determining optimum frequency and optimum phase and produce the radiofrequency signal (being stabilized in optimum frequency and phase place) with described optimum frequency and phase place all the time, described frequency synthesis unit 10 can be controlled and produce the radiofrequency signal with optimum frequency and phase variable.Namely, now microwave source system works is at best frequency, but phase place is in dynamic conditioning state always.
Thus, owing to working under dynamic phasing change, the focus of micro-wave oven can change along with phase place change, thus can significantly improve microwave-oven-heating uniformity.
In addition, control unit 30 can also be used for adjusting frequency according to the power output of power amplification unit 20 output amplitude of comprehensive unit 10, thus the power output of power amplification unit 20 is in predetermined power grade.
According to one embodiment of the present invention, described frequency synthesis unit 10, described power amplifier 20 and described antenna and Wave guide unit 40 is multiple and quantity is identical, or described frequency synthesis unit 10 is one and described power amplifier 20 is multiple with described antenna and Wave guide unit 40 and quantity is identical, or described frequency synthesis unit 10 is respectively one for multiple and described power amplifier 20 and described antenna and Wave guide unit 40.
Fig. 2 is the block diagram of the microwave source system according to another embodiment of the present invention.
In fig. 2, described frequency synthesis unit 10, described power amplifier 20 and described antenna and Wave guide unit 40 are four.A described frequency synthesis unit 10, described power amplifier 20 and a described antenna and Wave guide unit 40 form a microwave source passage, can realize multichannel (4 passage) microwave source thus.
Fig. 3 is the block diagram of the microwave source system according to another embodiment of the present invention.
In figure 3, described frequency synthesis unit 10 is one and described power amplifier 20 and described antenna and Wave guide unit 40 are four, can realize multichannel (4 passage) microwave source thus equally.
Fig. 4 is the block diagram of the microwave source system according to another embodiment of the present invention.
In the diagram, described frequency synthesis unit 10 is four and described power amplifier 20 and described antenna and Wave guide unit 40 are respectively one, can realize multichannel (4 passage) microwave source thus equally.
Although illustrated the arrangement of components situation of specific quantity in Fig. 2-4, it has been only exemplary, is not intended to limit the present invention.
By arranging multiple microwave source passage in microwave source system, subregion heating (that is, having multi-channel control process in control unit 30, the independent region controlling multiple passage heating respective amount) accurately can be carried out.Further, limited compared to the peak power output of semiconductor power amplifier pipe, the power output (namely increasing the power output of complete machine) that multiple microwave source passage can increase microwave source system is set.Wherein, described multiple microwave source passage can all work simultaneously, also can enter wherein some work, and specifically all whether work can set according to actual conditions.
According to one embodiment of the present invention, when described frequency synthesis unit 10, described power amplifier 20 and described antenna and Wave guide unit 40 be multiple and quantity is identical, each passage comprising a described frequency synthesis unit 10, described power amplifier 20 and a described antenna and Wave guide unit 40 works or operate in asynchronous mode in a synchronous mode.
For the situation of 4 passages, asynchronous mode is that 4 passages work alone, and the control process of control unit 30 is 4, controls 4 paths respectively, between 4 paths except common source, uncorrelated mutually.Synchronous working pattern is optimum frequency by recording each passage frequently and after phase place (value), and be weighted on average four results, determine weighted average frequency and phase place, then control 4 passages are operated in weighted average frequency and phase place together.
According to one embodiment of the present invention, this system also comprises power subsystem (not shown), for powering for described controller 30, described frequency synthesis unit 10, described power amplifier 20 and described antenna and Wave guide unit 40.That is, the dc source required for microwave source system is provided.
According to one embodiment of the present invention, control unit 30 can be single-chip microcomputer or microprocessor, and such as model is the chip of LPC433.Except the function described in above-mentioned embodiment, control unit 30 externally can also dock with complete machine main control unit and communicate, and receives and performs the control command of main control unit, report the duty of microwave source system.
According to one embodiment of the present invention, frequency synthesis unit 10 can comprise frequency synthesis chip (such as, having the frequency synthesis chip Volcano of logarithmic attenuator) and reference crystal oscillator.Rise and can produce microwave source radiofrequency signal used, the frequency, phase place, amplitude etc. of this radiofrequency signal are all can be controlled by control unit 30.Its radio frequency interface is connected with power amplification unit 20, and its data-interface is connected with control unit 30, can adopt SPI communication mode.Can change ground, frequency synthesis unit 10 also can comprise VCO circuit, phase modulation circuit and modulation circuit.
According to one embodiment of the present invention, the radio frequency link of power amplification unit 20 can by promoting power tube in advance, promote power tube, final stage power amplifier pipe, isolation (annular) device form, peripheral auxiliary circuits can comprise digital temperature sensor circuit, current detection circuit, ouput power detection circuit, reflection power testing circuit, power discharging switch circuit, grid voltage control circuit and directional coupler and form.
According to one embodiment of the present invention, antenna and Wave guide unit 40 are made up of large-power directional antenna and feed-in waveguide, for converting guided wave (radio frequency) to space free ripple (electromagnetic wave).
It will be appreciated by those skilled in the art that above-mentioned example is only exemplary, be not intended to limit the present invention.
One embodiment of the present invention additionally provides a kind of micro-wave oven, and this micro-wave oven comprises the microwave source system described in above-mentioned embodiment.
By using above-mentioned microwave source system in micro-wave oven, because this microwave source system can determine optimum frequency and phase place automatically, make standing wave best (reflection power is minimum), so under equal-wattage grade, the heating effect comprising the micro-wave oven of above-mentioned microwave source system is obviously better than common magnetron or solid state microwave sources.
Fig. 5 is the flow chart of the method implemented in microwave source system according to one embodiment of the present invention.Wherein, described microwave source system comprises frequency synthesis unit, power amplification unit and control unit.
As shown in Figure 5, the method implemented in microwave source system that one embodiment of the present invention provides comprises:
S500, utilize described control unit to control described frequency synthesis unit and produce multiple different radiofrequency signal, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place, wherein said multiple different radiofrequency signal is amplified by described power amplification unit; And
S502, utilizes described control unit to control described frequency synthesis unit and produces the radiofrequency signal with described optimum frequency and phase place.
Utilize the control unit of microwave source system to control described frequency synthesis unit and produce multiple different radiofrequency signal, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place, and control described frequency synthesis unit and produce the radiofrequency signal with described optimum frequency and phase place.Thus, due to the generation of frequency synthesis unit is the radiofrequency signal with optimum frequency and phase place, so this radiofrequency signal can obtain best power output after power amplifier amplifies, the accurate control to microwave oven output power can be realized, thus improve heating effect.
Thus, after the described frequency synthesis unit generation of control has the radiofrequency signal of described optimum frequency and phase place, the radiofrequency signal with optimum frequency and phase place produced will be fed in microwave oven cavity by antenna and Wave guide unit (ANT) after power amplification unit amplifies.
In the method, S500 comprises:
S5000, controls described frequency synthesis unit and produces the identical and radiofrequency signal that frequency is different of multiple phase place;
S5002, the power output that frequency is different radiofrequency signal is corresponding based on the identical from described multiple phase place of described power amplification unit and reflection power calculate multiple first standing wave values of microwave oven cavity;
S5004, using the frequency of radiofrequency signal corresponding for minimum standing wave value in described multiple first standing wave value as optimum frequency;
S5006, controls described frequency synthesis unit and produces multiple have optimum frequency and the different radiofrequency signal of phase place;
S5008, multiple has optimum frequency and power output corresponding to the different radiofrequency signal of phase place and reflection power calculate multiple second standing wave values of microwave oven cavity based on described power amplification unit from described;
S5010, using the phase place of radiofrequency signal corresponding for minimum standing wave value in described multiple second standing wave value as optimum phase.
Alternatively, after determining optimum frequency, the operation determining optimum phase can not be performed.Now, be different from and control described frequency synthesis unit after determining optimum frequency and optimum phase and produce the radiofrequency signal (being stabilized in optimum frequency and phase place) with described optimum frequency and phase place all the time, described frequency synthesis unit can be controlled and produce the radiofrequency signal with optimum frequency and phase variable.Namely, now microwave source system works is at best frequency, but phase place is in dynamic conditioning state always.
Thus, owing to working under dynamic phasing change, the focus of micro-wave oven can change along with phase place change, thus can significantly improve microwave-oven-heating uniformity.
In addition, the method also comprises: the output amplitude of comprehensive unit of adjusting frequency according to the power output of power amplification unit, thus the power output of power amplification unit is in predetermined power grade.
According to one embodiment of the present invention, control described frequency synthesis unit and produce the identical and radiofrequency signal that frequency is different of multiple phase place with preset frequency interval; Control described frequency synthesis unit and produce multiple have optimum frequency and the different radiofrequency signal of phase place with predetermined phase interval.
Wherein, preset frequency interval can be 1MHz, and predetermined phase interval can be 5 °.What the power control mode of described frequency synthesis unit adopted can be logarithmic attenuator, makes this control of power output more accurate thus.
Be spaced apart 1MHz with preset frequency below, and predetermined phase is spaced apart 5 ° for the example microwave source system above-mentioned to the present invention and is described.
After microwave source system Intrusion Detection based on host (master control) order in the above-mentioned embodiment of the present invention is opened, control unit 30 can carry out Initialize installation to frequency synthesis unit 10, the radiofrequency signal of what frequency synthesis unit produced thus is original frequency and initial phase.
When not needing adjustment power output, this radiofrequency signal, by being amplified after power amplification unit, finally can be transmitted in microwave oven cavity by antenna and Wave guide unit.Wherein, its information such as power output, reflection power can be outputted to control unit by power amplification unit, control unit adjusts the output amplitude frequently combining unit according to the size of power output, on the power grade that power amplifier unit power output is in set by main frame.The standing wave value of cavity is calculated according to power output and reflection power.
When needs adjustment power output makes microwave source system works in optimum state, control unit 30 controlled frequency comprehensive unit 10 carry out stepping be the frequency scanning of 1MHz (namely, produce the identical and radiofrequency signal that frequency is different of multiple phase place, now phase place can be still initial phase), power amplification unit 20 can produce corresponding power output and reflection power simultaneously, and control unit 30 can calculate corresponding standing wave value simultaneously.When after predetermined frequency band (working band) is scanned, control unit 30 can obtain the frequency that in predetermined frequency band, minimum standing wave value is corresponding, and this frequency is confirmed as optimum frequency.Then control unit 30 again controlled frequency comprehensive unit 10 carry out in optimum frequency stepping be the phasescan of 5 ° (namely, produce and multiplely there is optimum frequency and the different radiofrequency signal of phase place), power amplification unit 20 can produce corresponding power output and reflection power simultaneously, and control unit 30 can calculate corresponding standing wave value simultaneously.After having scanned 360 °, control unit 30 can obtain phase place corresponding to minimum standing wave value in 360 ° of phase places, and this phase place is confirmed as optimum phase.Thus, optimum frequency and phase place are all determined, solid state microwave origin system works under will resting on optimum frequency and phase place (described control unit 30 controls described frequency synthesis unit 10 and produces the radiofrequency signal with described optimum frequency and phase place).
In addition, control unit 30 also can carry out scanning phase bit motion by controlled frequency comprehensive unit 10 always, and solid state microwave origin system will be operated in optimum frequency but phase place is in dynamic conditioning state always.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a microwave source system, this system comprises frequency synthesis unit, power amplification unit and control unit, wherein:
Described frequency synthesis unit is for generation of radiofrequency signal;
Described power amplification unit is connected with described frequency synthesis unit, for performing amplifieroperation to described radiofrequency signal;
Described control unit is connected with described frequency synthesis unit and described power amplification unit, multiple different radiofrequency signal is produced for controlling described frequency synthesis unit, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place, and control described frequency synthesis unit and produce the radiofrequency signal with described optimum frequency and phase place.
2. system according to claim 1, wherein, this system also comprises antenna and Wave guide unit, is connected with described power amplification unit, is fed in microwave oven cavity for converting the radiofrequency signal after amplification to electromagnetic wave.
3. system according to claim 2, wherein, described control unit controls described frequency synthesis unit and produces multiple different radiofrequency signal, comprises based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place:
Control described frequency synthesis unit and produce the identical and radiofrequency signal that frequency is different of multiple phase place;
The power output that frequency is different radiofrequency signal is corresponding based on the identical from described multiple phase place of described power amplification unit and reflection power calculate multiple first standing wave values of microwave oven cavity;
Using the frequency of radiofrequency signal corresponding for minimum standing wave value in described multiple first standing wave value as optimum frequency;
Control described frequency synthesis unit and produce multiple have optimum frequency and the different radiofrequency signal of phase place;
Multiple there is optimum frequency and power output corresponding to the different radiofrequency signal of phase place and reflection power calculate multiple second standing wave values of microwave oven cavity based on described power amplification unit from described;
Using the phase place of radiofrequency signal corresponding for minimum standing wave value in described multiple second standing wave value as optimum phase.
4. the system according to Claims 2 or 3, wherein, described frequency synthesis unit, described power amplifier are multiple with described antenna and Wave guide unit and quantity is identical, or described frequency synthesis unit is one and described power amplifier and described antenna and Wave guide unit are multiple and quantity is identical, or described frequency synthesis unit is that multiple and described power amplifier and described antenna and Wave guide unit are respectively one.
5. system according to claim 4, wherein, when described frequency synthesis unit, described power amplifier and described antenna and Wave guide unit be multiple and quantity is identical, eachly comprise a described frequency synthesis unit, the passage of a described power amplifier and a described antenna and Wave guide unit work or operate in asynchronous mode in a synchronous mode.
6. the system according to any one of claim 2-3, wherein, this system also comprises power subsystem, for powering for described controller, described frequency synthesis unit, described power amplifier and described antenna and Wave guide unit.
7. a micro-wave oven, this micro-wave oven comprises the microwave source system according to any one of the claims 1-6.
8. the method implemented in microwave source system, wherein, described microwave source system comprises frequency synthesis unit, power amplification unit and control unit, and the method comprises:
Utilize described control unit to control described frequency synthesis unit and produce multiple different radiofrequency signal, based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place, wherein said multiple different radiofrequency signal is amplified by described power amplification unit; And
Utilize described control unit to control described frequency synthesis unit and produce the radiofrequency signal with described optimum frequency and phase place.
9. method according to claim 8, wherein, utilize described control unit to control described frequency synthesis unit and produce multiple different radiofrequency signal, comprise based on the power output corresponding from described multiple different radiofrequency signal of described power amplification unit and the optimum frequency of reflection power determination radiofrequency signal and phase place:
Control described frequency synthesis unit and produce the identical and radiofrequency signal that frequency is different of multiple phase place;
The power output that frequency is different radiofrequency signal is corresponding based on the identical from described multiple phase place of described power amplification unit and reflection power calculate multiple first standing wave values of microwave oven cavity;
Using the frequency of radiofrequency signal corresponding for minimum standing wave value in described multiple first standing wave value as optimum frequency;
Control described frequency synthesis unit and produce multiple have optimum frequency and the different radiofrequency signal of phase place;
Multiple there is optimum frequency and power output corresponding to the different radiofrequency signal of phase place and reflection power calculate multiple second standing wave values of microwave oven cavity based on described power amplification unit from described;
Using the phase place of radiofrequency signal corresponding for minimum standing wave value in described multiple second standing wave value as optimum phase.
10. method according to claim 9, wherein,
Control described frequency synthesis unit and produce the identical and radiofrequency signal that frequency is different of multiple phase place with preset frequency interval;
Control described frequency synthesis unit and produce multiple have optimum frequency and the different radiofrequency signal of phase place with predetermined phase interval.
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