CN201717233U - Magnetron - Google Patents
Magnetron Download PDFInfo
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- CN201717233U CN201717233U CN2010202032273U CN201020203227U CN201717233U CN 201717233 U CN201717233 U CN 201717233U CN 2010202032273 U CN2010202032273 U CN 2010202032273U CN 201020203227 U CN201020203227 U CN 201020203227U CN 201717233 U CN201717233 U CN 201717233U
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- 238000003466 welding Methods 0.000 claims description 2
- 230000003071 parasitic effect Effects 0.000 abstract description 8
- 230000010355 oscillation Effects 0.000 abstract description 6
- 230000005672 electromagnetic field Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model discloses a magnetron, which comprises an anode cylinder, magnetic poles arranged at the upper end and the lower end of the anode cylinder, a plurality of blades positioned between the two magnetic poles and connected with the inner wall of the anode cylinder, and a coupling antenna passing through the magnetic pole at one end and connected with the blades; along the axial direction of the anode cylinder, the upper end face of each blade is positioned on the same plane, the lower end face of each blade is positioned on the other horizontal plane, and the distance between the magnetic pole of the coupling antenna penetrating through one end and the end face of the end close to the blade is not less than 2.5mm and not more than h2 and not more than 3.5 mm. The utility model discloses remedy because coupling antenna's existence causes the asymmetry of electromagnetic field among the positive pole resonant system, reduce the noise level of other parasitic oscillation modes in the magnetron, make the electromagnetic compatibility performance of continuous wave magnetron obtain the promotion of very big degree. The improvement of the utility model can reduce the complexity of the magnetron, reduce the manufacturing cost and realize the miniaturization because the choking structure is not needed to be designed additionally to restrain the unnecessary parasitic harmonic from leaking.
Description
Technical field
The utility model relates to the magnetron technology, a kind of continuous wave magnetron of saying so more specifically.
Background technology
Continuous wave magnetron produces electromagnetic interference in very wide frequency range, its mechanism that produces microwave is to do wheel cycloid motion at cathode surface from the electronics of cathode emission under the effect of crossed field, when electronics is close along the phase velocity of the speed of angle and a certain space harmonics of the resonator system that is made of anode tube, blade and magnetic pole, produce strong electromagnetic interaction, thereby the generation electromagnetic viscosimeter, this electromagnetic viscosimeter is exported by coupled antenna.
For the electromagnetic noise of the frequency range of 1GHz～18GHz, prior art mainly is with the noise of inhibition special frequency channel by the corresponding choke structure of design in pipe.The main design principle of chokes technology is that the characteristic impedance apart from short circuit face quarter-wave strong point in the coaxial line is infinity, thereby forms the total reflection of microwave.Just adopted two tubular choke structures to suppress leaking of unwanted high frequency time harmonic waves such as triple-frequency harmonics and quintuple harmonics as Chinese patent publication number CN98102605.2, CN02160549.1, CN200610171247.5, the disclosed magnetron of CN200810054042.8, its advantage is at specific frequency good attenuating to be arranged.It disadvantageously need design corresponding choke structure in the output loop of magnetron, and the size of structure can be subjected to the restriction of the existing size of output loop.
In addition, it disadvantageously when needing to suppress the electromagnetic noise of a plurality of frequency ranges, needs a plurality of choke structures of design, makes structure become quite complicated.Cause the increase of component count simultaneously, thereby make assembling become difficult, and cause and produce and the manufacturing cost rising.
The utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, providing a kind of does not need to be provided with specially complicated choke structure and just can suppress special frequency channel (magnetron of noise of 1GHz～18GHz) can guarantee to improve the manufacturing cost that magnetron electromagnetic compatibility level can reduce magnetron again.
The realization the technical solution of the utility model is: a kind of magnetron, comprise anode tube (2) and be arranged on anode tube (2) magnetic pole at two ends up and down, and between two magnetic poles and a plurality of blades (3) that are connected with anode tube inwall, the coupled antenna (5) that passes an end magnetic pole (4) wherein and be connected with blade; It is characterized in that: along anode tube (2) axis direction, the upper surface of each blade (3) is in the same plane, the lower surface of each blade (3) is on another horizontal plane, described coupled antenna (5) pass an end the close end end face of magnetic pole (4) with blade (3) apart from 2.5mm≤h2≤3.5mm.
The magnetic pole (1) of described anode tube (2) other end is h1 with the distance of the close end end face of blade (3), and 1.5≤h2/h1≤2.
The magnetic pole (1) of described anode tube (2) other end is h1 with the distance of the close end end face of blade (3), and 1.7mm≤h1≤2.7mm.
The value of described h1 is 1.7mm.
Described anode tube (2) magnetic pole at two ends up and down is respectively A side magnetic pole (4) and K side magnetic pole (1), and A side magnetic pole (4) is provided with and is used for the hole that coupled antenna (5) passes, and coupled antenna (5) passes this Kong Houyu blade welding.
As further improvement of the utility model, described A side magnetic pole (4) is provided with towards the outstanding boss of blade (3); Described distance h 1 is the distance of this raised head face (41) and the close end end face of blade (3).
Described K side magnetic pole (1) is provided with towards the outstanding boss (11) of blade (3); Described distance is that h2 is the distance of this raised head face (11) and the close end end face of blade (3).
Further improve as of the present utility model, the close end end face in the boss root plane (42) of described A side magnetic pole (4) with blade (3) apart from 7.6mm≤h3≤8.6mm.
Described h3 value is 8.1mm.
The utility model is symmetrically distributed by improving electromagnetic field, remedy because the existence of coupled antenna causes the asymmetric of electromagnetic field in the anode resonator system, under the situation that does not influence the magnetron mode of operation, improve the work mode spectrum characteristic of its correspondence, reduce the noise level of other parasitic oscillation pattern in the magnetron, make electromagnetic compatibility (EMC) performance of continuous wave magnetron obtain the lifting of very big degree.This improvement of the present utility model does not suppress unwanted parasitic harmonic wave and leaks owing to do not need to design in addition choke structure, therefore can reduce magnetron complexity, reduce cost of manufacture, also can realize miniaturization simultaneously.
Description of drawings
Below in conjunction with the drawings and specific embodiments concrete technical scheme of the present utility model is further described.
Fig. 1 is a magnetron cut-away view of the present utility model;
Fig. 2 is the structural representation of the magnetron of horizontally set;
Fig. 3 is the end view of Fig. 2;
Fig. 4 is magnetic pole and the dispersion relation figure of blade pitch before and after improving;
Fig. 5 is the main effect figure of N=7 modal noise.
Embodiment
The utility model is described in further detail below in conjunction with embodiment.
Magnetron of the present utility model shown in Fig. 1～3 comprises anode tube 2 and is welded on a plurality of blades 3 on the anode tube inwall, cover the A side magnetic pole 4 and the K side magnetic pole 1 that covers anode tube 2 bottoms of anode tube 2 upper ends, A side magnetic pole 4 is provided with the hole, and the Kong Bingyu blade 3 that coupled antenna 5 passes on the A side magnetic pole 4 welds together.The upper surface of wherein a plurality of blades 3 is in the same plane, and the lower surface is on another horizontal plane.A side magnetic pole 4 and K side magnetic pole 1 are respectively equipped with boss and the boss of giving prominence to towards blade 3.As shown in Figure 1, raised head face 41 is h2 with the distance of blade 3 lower surfaces, and this distance h 2 is between 2.5mm～3.5mm.The raised head face 11 of K side magnetic pole 1 is h1 with the distance of blade 3 upper surfaces, and this distance h 1 perhaps satisfies: be 1.5≤h2/h1≤2 between 1.7mm～2.7mm.Wherein the optimum value of h1 is 1.7mm.In addition, the boss root plane 42 of A side magnetic pole 4 and blade 3 close end end faces apart from 7.6mm≤h3≤8.6mm.Wherein h3 value the best is 8.1mm.
Above-mentioned scheme, can improve electromagnetic field is symmetrically distributed, remedy because the existence of coupled antenna causes the asymmetric of electromagnetic field in the anode resonator system, under the situation that does not influence the magnetron mode of operation, improve the work mode spectrum characteristic of its correspondence, reduce the noise level of other parasitic oscillation pattern in the magnetron, make electromagnetic compatibility (EMC) performance of continuous wave magnetron obtain the lifting of very big degree.
As shown in Figure 4, the dispersion relation contrast before and after improving of magnetic pole and blade pitch, among the figure: solid line is represented the operating voltage line, and the chain-dotted line that is positioned at the solid line top is 1.15 times of standard operation pressure-wires, and the chain-dotted line that is positioned at below, solid line below is 0.75 times of standard operation pressure-wire.Transverse axis is represented pattern count N, and the longitudinal axis is represented resonance frequency f (GHz).The dispersed lines of the existing magnetron structures of the line at square dot place representative among the figure, the line at triangle form point place is represented the dispersed lines of the utility model magnetron structures.The pattern that occurs between 1.15 times of standard operation voltages and 0.75 times of standard operation voltage is exactly the spurious mode that may encourage, spurious mode easy being energized more just of operating voltage line more wherein is near the mark, as can be seen from the figure, frequency characteristics under the existing magnetron structures are: Frequency point under the pattern of N=8 and operating voltage line close proximity, it is a frequency that more easily produces parasitic oscillation, under the pattern of N=7 and N=17, (because the angle of magnetron periodically, make both differ integral multiple into the chamber number, described two patterns are actually same pattern), its Frequency point when N=17 and operating voltage line be close proximity also, therefore this also is a frequency that more easily produces parasitic oscillation, the frequency point value got twice when the frequency point value was N=8 approximately when also existing characteristics to be exactly N=7 simultaneously, was easy to generate the parasitic oscillation pattern; Frequency characteristics under the magnetron structures of the present utility model after the improvement are: the about 800MHz that descended of the Frequency point when pattern N=7, when N=17, its Frequency point will be than existing structure further from the standard operation pressure-wire, and the relation of the twice of frequency point value when the frequency point value is N=8 approximately can N=7 not occur the time, thereby help suppressing the noise of the pattern of N=7.
As shown in Figure 5 be that A side magnetic pole 4 under the N=7 pattern influences graph of a relation with blade 3 variable in distance to magnetron noise main effect.The transverse axis left-half is represented the value of h3 among the figure, and right half part is represented the value of h2, and the longitudinal axis is represented noise mean value, and its unit is dB u V/m.Shown in the figure, when the distance h 3 of plane on the edge of A side magnetic pole 4 (being the root plane 42 of boss) and blade (3) lower surface was 8.1mm, h3 was in optimum efficiency to reducing the magnetron noise; Along with the boss plane 41 of A side magnetic pole 4 and the increase of distance h 2 values of blade 3 lower surfaces, the magnetron noise presents downward trend, yet as those skilled in the art in common knowledge be increase along with the h2 value, the central magnetic field of magnetron can reduce, therefore under the situation that concerns of balance magnetic field and noise, the h2 value is more satisfactory equilibrium region between 1.7mm to 2.7mm.
Claims (9)
1. a magnetron comprises anode tube (2) and is arranged on anode tube (2) magnetic pole at two ends up and down, and between two magnetic poles and a plurality of blades (3) that are connected with anode tube inwall, the coupled antenna (5) that passes an end magnetic pole (4) wherein and be connected with blade; It is characterized in that: along anode tube (2) axis direction, the upper surface of each blade (3) is in the same plane, the lower surface of each blade (3) is on another horizontal plane, described coupled antenna (5) pass an end the close end end face of magnetic pole (4) with blade (3) apart from 2.5mm≤h2≤3.5mm.
2. according to the described magnetron of claim 1, it is characterized in that: the magnetic pole (1) of described anode tube (2) other end is h1 with the distance of the close end end face of blade (3), and 1.5≤h2/h1≤2.
3. according to the described magnetron of claim 1, it is characterized in that: the magnetic pole (1) of described anode tube (2) other end is h1 with the distance of the close end end face of blade (3), and 1.7mm≤h1≤2.7mm.
4. according to claim 2 or 3 described magnetrons,, it is characterized in that: the value of described h1 is 1.7mm.
5. according to claim 1 or 2 or 3 described magnetrons, it is characterized in that: described anode tube (2) magnetic pole at two ends up and down is respectively A side magnetic pole (4) and K side magnetic pole (1), A side magnetic pole (4) is provided with and is used for the hole that coupled antenna (5) passes, and coupled antenna (5) passes this Kong Houyu blade welding.
6. according to the described magnetron of claim 5, described magnetron is characterized in that: described A side magnetic pole (4) is provided with towards the outstanding boss of blade (3); Described distance h 1 is the distance of this raised head face (41) and the close end end face of blade (3).
7. according to the described magnetron of claim 5, described magnetron is characterized in that: described K side magnetic pole (1) is provided with towards the outstanding boss (11) of blade (3); Described distance is that h2 is the distance of this raised head face (11) and the close end end face of blade (3).
8. according to the described magnetron of claim 6, it is characterized in that: the close end end face in the boss root plane (42) of described A side magnetic pole (4) with blade (3) apart from 7.6mm≤h3≤8.6mm.
9. described according to Claim 8 magnetron is characterized in that: described h3 value is 8.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202032273U CN201717233U (en) | 2010-05-19 | 2010-05-19 | Magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202032273U CN201717233U (en) | 2010-05-19 | 2010-05-19 | Magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717233U true CN201717233U (en) | 2011-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202032273U Expired - Fee Related CN201717233U (en) | 2010-05-19 | 2010-05-19 | Magnetron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201717233U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847556A (en) * | 2010-05-19 | 2010-09-29 | 美的集团有限公司 | Magnetron |
| CN107093540A (en) * | 2016-12-15 | 2017-08-25 | 中国工程物理研究院应用电子学研究所 | A kind of relativistic magnetron of multiple antennas coupling-out structure |
-
2010
- 2010-05-19 CN CN2010202032273U patent/CN201717233U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847556A (en) * | 2010-05-19 | 2010-09-29 | 美的集团有限公司 | Magnetron |
| CN107093540A (en) * | 2016-12-15 | 2017-08-25 | 中国工程物理研究院应用电子学研究所 | A kind of relativistic magnetron of multiple antennas coupling-out structure |
| CN107093540B (en) * | 2016-12-15 | 2018-10-02 | 中国工程物理研究院应用电子学研究所 | A kind of relativistic magnetron of multiple antennas coupling-out structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER NAME: MEIDI GROUP CO. LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: MIDEA GROUP Co.,Ltd. Address before: 528311 Penglai Road, Beijiao Town, Shunde District, Guangdong, Foshan province Midea Group Co., Ltd. Patentee before: Midea Group |
|
| ASS | Succession or assignment of patent right |
Owner name: GUANGDONG WITOL VACUUM ELECTRONIC MANUFACTURING CO Free format text: FORMER OWNER: MIDEA GROUP CO., LTD. Effective date: 20131204 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131204 Address after: 528311 Beijiao Industrial Park, Beijiao Town, Foshan, Guangdong, China, Shunde Patentee after: GUANGDONG WITOL VACUUM ELECTRONIC MANUFACTURE Co.,Ltd. Address before: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee before: MIDEA GROUP Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20190519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |