CN102569971B - Multi-magnetron series-connected microwave power synthesizer - Google Patents
Multi-magnetron series-connected microwave power synthesizer Download PDFInfo
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- CN102569971B CN102569971B CN201210006101.0A CN201210006101A CN102569971B CN 102569971 B CN102569971 B CN 102569971B CN 201210006101 A CN201210006101 A CN 201210006101A CN 102569971 B CN102569971 B CN 102569971B
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Abstract
The invention discloses a multi-magnetron series-connected microwave power synthesizer which mainly comprises a wave conductor and at least two magnetrons, wherein the magnetrons are arranged on the wave conductor and used for transmitting microwaves. At least two open holes are processed in the wave conductor in a position which is lambda/(n+1/4) away from the terminal of a short circuit, and the open holes are matched with antennas of the magnetrons. The antennas of the magnetrons extend into the wave conductor through the open holes, and the magnetrons and the wave conductor are fixed together with fixed parts. The multi-magnetron series-connected microwave power synthesizer uses the injection locking principle and locks microwave frequencies and phases of a plurality of magnetrons together, which realizes the synthesis of microwave power. Compared with a high-power single-magnetron microwave source device of the prior art, the microwave power synthesizer provided by the invention as a microwave source device has the advantages of low price, simple structure, etc., and can meet the requirements of transmitting microwave power and heating the microwave source device to required power.
Description
Technical field
The present invention relates to microwave power synthetic technology, belong to microwave device field, more specifically, relate to a kind of microwave power synthesizer.
Background technology
Microwave has been widely used in the technical fields such as radar, communication, microwave power transmission, microwave heating.Along with the development of economic technology, utilize the field of microwave power transmission, heating more and more.And utilize microwave power transmission, heating need to use powerful microwave source device.The high-power microwave source device using at present, is mainly powerful magnetron, and its power can reach tens kilowatts, and maximum is no more than tens kilowatts.Magnetron is because change at random can occur for frequency and phase place, cannot directly carry out Coherent Power synthetic, therefore at present under prior art condition, can only carry out microwave power transmission, heating as powerful microwave source device using single high power magnetron.And the high power magnetron of prior art, its structure all contains expensive circulator, isolator.Therefore, the place using single high power magnetron as microwave source device deficiency, the one, prop up high power magnetron as the list of microwave source device expensive, equipment cost is high; Its two, because the power of single magnetron is determined, and the specification of magnetron is limited, therefore using single high power magnetron as microwave power transmission, the microwave source device of heating, be difficult to meet the high-power requirement that production practices propose.Particularly, in industrial microwave heating field, be difficult to meet the requirement to HIGH-POWERED MICROWAVES components and parts.
Summary of the invention
The deficiency existing for the high-power microwave source device of prior art, object of the present invention aims to provide a kind of new high-power microwave source device-Multi-magnetron series-connected microwave power synthesizer, demand high-power microwave source device being proposed to meet production practices.
Thought of the present invention is to utilize the general principle of injection locking, if oscillation source is subject to the impact of a frequency approach signal, its output frequency can be locked in the frequency of this Injection Signal, and is no longer the free oscillation frequency of self.The present invention utilizes this characteristic of magnetron to propose technical scheme of the present invention just, realizes microwave power synthetic, obtains a kind of new high-power microwave source device.
The Multi-magnetron series-connected microwave power synthesizer that the present invention proposes, its structure comprises mainly by wave conductor and is arranged on and on wave conductor, is no less than the magnetron for launched microwave of 2 and forms, wave conductor is processed with in the position that is λ (n+1/4) apart from short circuit termination distance the perforate matching with magnetron antenna, and perforate sum is no less than 2, magnetron antenna is extend in wave conductor by perforate, magnetron and wave conductor are fixed together with fixture, make the frequency of magnetron reach consistent based on magnetron injection locking mechanism, adjacent two magnetrons are set to 1 guide wavelength (λ), make the phase place of two magnetrons reach consistent, thereby reach relevant synthesis condition, realize Coherent Power synthetic, improve power stage.
In technique scheme, described wave conductor preferentially adopt operating frequency range cover microwave source frequency, section is rectangular square wave conductor.
In technique scheme, the perforate matching with magnetron antenna of processing on wave conductor is preferably perpendicular to wave conductor direction, perpendicular to wave conductor, together with magnetron is vertically fixed on wave conductor with fixed component.Magnetron normally using sheet metal as fixture and wave conductor be fixed together.Described magnetron is preferably disposed in the wider side's of square wave conductor dignity, and is preferably disposed on the straight line of the wider side's dignity of square wave conductor.The antenna of magnetron is generally cylindrical antenna, and the perforate on wave conductor is correspondingly also cylindrical hole.
In technique scheme, the magnetron being arranged on wave conductor is not more than λ/10 apart from the range error between distance and two magnetrons of waveguide short terminal.
Multi-magnetron series-connected microwave power synthesizer provided by the invention, its design has been furtherd investigate microwave power synthesis mechanism based on inventor.When two magnetrons are during simultaneously to wave conductor input microwave power, microwave produces resonance in wave conductor, identical at the boundary condition of the terminal microwave of wave conductor, is short-circuit condition, and the power of first magnetron is understood some and injected second magnetron.Due to the mechanism of magnetron injection locking, it is consistent that the frequency of two magnetrons can reach.Because two magnetrons are spaced apart 1 guide wavelength (λ), it is consistent that the phase place of two magnetrons also can reach again.Therefore, the microwave equiphase surface that two microwave magnetron sources produce overlaps, thereby it is synthetic to realize the power of microwave at output, obtains one and doubles new high-power microwave source device of magnetron power.
The present invention by arranging multiple low power magnetrons on wave conductor, utilize injection locking principle, the microwave frequency of branched magnetron is locked together, realize the synthetic of microwave power, obtain a new high-power microwave source device, the watt level of new microwave source device depends on the magnetron quantity of series connection, the more power of quantity of series connection magnetron is larger, therefore Multi-magnetron series-connected microwave power synthesizer of the present invention, can meet the power requirement that production practices propose microwave source device completely, power is changeable.
Multi-magnetron series-connected microwave power synthesizer provided by the invention, compared with the microwave source device magnetron of prior art, sums up and has the following advantages and outstanding technique effect:
1. the present invention has utilized the theory of injection locking, can lock the microwave of branched microwave magnetron, has improved the operating efficiency of magnetron, has reduced the discrete of frequency.
2. microwave power synthesizer microwave power capacity of the present invention is large, utilizes branched magnetron to realize power synthetic, can obtain required HIGH-POWERED MICROWAVES output.
3. tandem type microwave magnetron power combiner, based on the structure of waveguide, form is simple, and volume is little, is easy to processing and transformation.
4. cost is low, without expensive device such as microwave high power circulator and isolators.It is much lower that cost ratio list props up HIGH-POWERED MICROWAVES magnetron.
Brief description of the drawings
Fig. 1 is the structural representation of the microwave power synthesizer of two magnetrons.
The Multi-magnetron series microwave power composition principle schematic diagram of Fig. 2 based on waveguide;
Fig. 3 is the structural representation of the microwave power synthesizer of multiple magnetrons.
In above-mentioned accompanying drawing, the object of each shown by reference numeral mark is: 1-wave conductor; 2-magnetron; 3-magnetron antenna; 4-wave conductor short dot.
Embodiment
Provide embodiments of the invention below in conjunction with brief description of the drawings, and the present invention is further illustrated by embodiment, so that understand more easily the present invention.But it needs to be noted; the specific embodiment of the present invention is not limited to the described form of embodiment below; those skilled in the art is not in the situation that paying creative work; also can design easily other embodiment; therefore the embodiment of embodiment given below should be interpreted as to protection scope of the present invention, protection scope of the present invention is limited in to given embodiment.
Embodiment 1
The Multi-magnetron series-connected microwave power synthesizer of the present embodiment, its structure as shown in Figure 1, is that BJ22 standard rectangular waveguide 1 and two rated power 900W tranmitting frequencies are that 2M219 microwave magnetron forms in the model of 2.45GHz scope by model.Put 1/4 guide wavelength place (37mm) and locate processing apart from 5/4 guide wavelength place (185mm) at the wide wall back gauge short circuit termination of waveguide respectively and match and send out a perforate with magnetron radiation antenna 3, the antenna of two magnetrons 3 use sheet metals are fixed in Guide of Wide Wall, and make antenna 3 stretch into waveguide inside by perforate central authorities.After two magnetron power supplies, obtain double magnetron rated power output at waveguide output.
Embodiment 2
The Multi-magnetron series-connected microwave power synthesizer of the present embodiment, its structure as shown in Figure 3, is that 1 and 4 rated power 900W tranmitting frequencies of BJ22 standard rectangular waveguide are that 2M219 microwave magnetron forms in the model of 2.45GHz scope by model.Respectively the wide wall back gauge short circuit termination of waveguide put 1/4 guide wavelength place (37mm), 5/4 guide wavelength place (185mm), 9/4 guide wavelength place (333mm) and 13/4 guide wavelength place (581mm) locate processing with magnetron antenna 3 match send out a perforate, the antenna of 4 magnetrons 3 use sheet metals are fixed in Guide of Wide Wall, and make radiating antenna 3 stretch into waveguide inside by perforate central authorities.After 4 magnetron power supplies, obtain the magnetron rated power output of 4 times at waveguide output.
Claims (10)
1. a Multi-magnetron series-connected microwave power synthesizer, it is characterized in that: mainly by wave conductor be arranged on and be no less than the magnetron for launched microwave of 2 on wave conductor and form, wave conductor is processed with in the position that is λ (n+1/4) apart from short circuit termination distance the perforate matching with magnetron antenna, and perforate sum is no less than 2, magnetron antenna is extend in wave conductor by perforate, magnetron and wave conductor are fixed together with fixture, make the frequency of magnetron reach consistent based on magnetron injection locking mechanism, adjacent two magnetrons are set to 1 guide wavelength (λ), make the phase place of two magnetrons reach consistent, thereby reach relevant synthesis condition, realize Coherent Power synthetic, improve power stage.
2. Multi-magnetron series-connected microwave power synthesizer according to claim 1, it is characterized in that described wave conductor be operating frequency range cover microwave source frequency, section is rectangular square wave conductor.
3. Multi-magnetron series-connected microwave power synthesizer according to claim 2, is characterized in that described magnetron is arranged in the wider side's dignity of square wave conductor.
4. Multi-magnetron series-connected microwave power synthesizer according to claim 3, is characterized in that described magnetron is arranged on square wave conductor compared with on the straight line of expanded letter face.
5. according to the Multi-magnetron series-connected microwave power synthesizer one of claim 1 to 4 Suo Shu, it is characterized in that the perforate of wave conductor is perpendicular to wave conductor direction, together with magnetron is vertically fixed on wave conductor.
6. according to the Multi-magnetron series-connected microwave power synthesizer one of claim 1 to 4 Suo Shu, it is characterized in that the antenna of magnetron is cylindrical antenna, the perforate on wave conductor is cylindrical hole.
7. according to the Multi-magnetron series-connected microwave power synthesizer one of claim 1 to 4 Suo Shu, the magnetron that it is characterized in that being arranged on wave conductor is not more than λ/10 apart from the range error between distance and two magnetrons of wave conductor short circuit termination.
8. Multi-magnetron series-connected microwave power synthesizer according to claim 5, the magnetron that it is characterized in that being arranged on wave conductor is not more than λ/10 apart from the range error between distance and two magnetrons of wave conductor short circuit termination.
9. Multi-magnetron series-connected microwave power synthesizer according to claim 6, the magnetron that it is characterized in that being arranged on wave conductor is not more than λ/10 apart from the range error between distance and two magnetrons of wave conductor short circuit termination.
10. Multi-magnetron series-connected microwave power synthesizer according to claim 8, is characterized in that the described fixture that magnetron and wave conductor are fixed together is conductive metal sheet.
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| CN201210006101.0A CN102569971B (en) | 2012-01-10 | 2012-01-10 | Multi-magnetron series-connected microwave power synthesizer |
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| CN102569971B true CN102569971B (en) | 2014-09-17 |
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| CN107819181B (en) * | 2017-12-12 | 2023-12-15 | 江苏德是和通信科技有限公司 | Waveguide power synthesizer |
| FR3081617B1 (en) * | 2018-05-23 | 2020-05-08 | Sairem Societe Pour L'application Industrielle De La Recherche En Electronique Et Micro Ondes | MICROWAVE COUPLER / COMBINER DEVICE AND ASSOCIATED MICROWAVE GENERATOR |
| CN109149039A (en) * | 2018-08-15 | 2019-01-04 | 浙江绿舟科技有限公司 | A kind of micro- distribution of work device of microwave |
| DE102020006892A1 (en) * | 2020-11-10 | 2022-05-12 | Diehl Defence Gmbh & Co. Kg | Horn antenna and its reconstruction |
| CN112616213B (en) * | 2020-12-16 | 2022-05-31 | 北京春藤星创教育科技有限公司 | High-efficiency waveguide slot antenna array for drying base cloth |
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| US4825651A (en) * | 1985-02-12 | 1989-05-02 | Bayerische Motoren Werke Aktiengesellschaft | Device and process for separating soot or other impurities from the exhaust gases of an internal-combustion engine |
| US5397555A (en) * | 1992-10-27 | 1995-03-14 | Dornier Gmbh | Process for reducing carbon particles in exhaust gas flows |
| US5782085A (en) * | 1995-04-07 | 1998-07-21 | Dornier Gmbh | Method and apparatus for continuously removing nitrogen oxides in exhaust gases of internal combustion engines |
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