CN107978504B - Magnetron energy output device and magnetron comprising same - Google Patents
Magnetron energy output device and magnetron comprising same Download PDFInfo
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- CN107978504B CN107978504B CN201711496715.0A CN201711496715A CN107978504B CN 107978504 B CN107978504 B CN 107978504B CN 201711496715 A CN201711496715 A CN 201711496715A CN 107978504 B CN107978504 B CN 107978504B
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- magnetron
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- 239000002184 metal Substances 0.000 claims description 56
- 230000008878 coupling Effects 0.000 claims description 32
- 238000010168 coupling process Methods 0.000 claims description 32
- 238000005859 coupling reaction Methods 0.000 claims description 32
- 238000005219 brazing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000009466 transformation Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
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- Details Of Aerials (AREA)
- Microwave Tubes (AREA)
Abstract
The invention discloses a magnetron energy output device and a magnetron comprising the same. The invention has low reflection coefficient and high structural strength.
Description
Technical Field
The invention relates to the technical field of vacuum electronic devices. And more particularly, to an energy output of a magnetron.
Background
Magnetrons are resonant devices that produce high frequency power. In a magnetron, the cathode includes an emitting surface, a heating mechanism, and shielding structures at both ends. The cathode is surrounded by a coaxial anode. The anode includes a resonant cavity and resonant slots, which may be formed by a plurality of radially distributed blade-like electrodes or other structures. An electric field is applied between the cathode and the anode, a magnetic field is arranged along the axis direction of the cathode, electrons emitted by the cathode interact with the electromagnetic field in a space formed between the outer surface of the cathode and the anode to generate a required microwave signal, and microwave energy is coupled out of the magnetron through an output window of the energy output device.
The energy output device in the existing magnetron has higher requirement on the precision of structural dimension, higher reflection coefficient and lower structural strength, and the performance is easy to be influenced by environmental mechanical stress.
Accordingly, it is desirable to provide an energy output device and magnetron having a low reflection coefficient and high structural strength.
Disclosure of Invention
The invention aims to provide an energy output device and a magnetron with low reflection coefficient and high structural strength.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the first aspect of the invention provides an energy output device, which comprises an output window and a metal shell, wherein the output window and the metal shell form a sealed cavity, an antenna assembly is arranged in the sealed cavity, and two coupling antennas of the antenna assembly respectively comprise L-shaped metal sections.
In the energy output device provided by the first aspect of the invention, the two coupling antennas lead the high-frequency voltage in the magnetron resonance system into the energy output device, the two L-shaped metal sections play a role in impedance transformation, and the high-frequency electromagnetic waves excited by the antenna assembly are output by the output window. The integral structure of the energy output device provided by the first aspect of the invention, in particular to the two L-shaped metal sections, has the following beneficial effects: the energy output device provided by the first aspect of the invention has a low reflection coefficient and relatively high structural strength. The low reflection coefficient enables the working stability of the magnetron resonance system to be higher, the high structural strength has higher adaptability to mechanical stress generated in the working process of the magnetron, and adverse effects caused by environmental mechanical stress can be eliminated or restrained. In addition, the energy output device provided by the first aspect of the invention has lower requirements on the precision of structural dimensions, and the zigzag impedance transformer formed by combining the L-shaped metal rod and the coupling antenna body has lower requirements on the precision of bending radius and bending position, so that the precision of other dimensions of the device can more easily meet the requirements in the manufacturing process.
Preferably, the antenna assembly has an axial antenna output structure.
Preferably, the two coupling antennas respectively include two coaxial interfaces for connecting to the anode, and a transmitting antenna connected to the other ends of the two coupling antennas. Wherein, two coaxial interfaces are used for leading the high-frequency voltage in the magnetron resonance system into the energy output device, and the transmitting antenna is used for exciting the high-frequency electromagnetic wave.
Preferably, the energy output device further comprises a support member fixed between the metal housing and the transmitting antenna. The support is used for further strengthening the structural strength of the antenna assembly so as to further strengthen the structural strength of the whole energy output device.
Preferably, the support is a circular metal rod. The circular metal rod-shaped supporting piece not only further strengthens the structural strength of the antenna assembly, but also can conduct heat energy generated by the transmitting antenna in the process of exciting high-frequency electromagnetic waves out of the metal shell.
Preferably, the support is centrally located in the energy output device. The support member positioned at the center of the energy output device is more beneficial to further strengthen the structural strength of the antenna assembly.
Preferably, the distance between the two L-shaped metal sections of the coupling antenna is greater than the distance between the coaxial interfaces of the coupling antenna, or the distance between the L-shaped metal sections of the coupling antenna is less than the distance between the coaxial interfaces of the coupling antenna. Thus being more beneficial to the two L-shaped metal rods to realize the function of impedance transformation.
Preferably, the output window, the metal shell and the antenna component are fixedly connected through brazing.
A second aspect of the invention provides a magnetron comprising the energy outputter disclosed in the first aspect of the invention.
The beneficial effects of the invention are as follows:
the technical scheme of the invention has low reflection coefficient and high structural strength. The low reflection coefficient enables the working stability of the magnetron resonance system to be higher, the high structural strength has higher adaptability to mechanical stress generated in the working process of the magnetron, and adverse effects caused by environmental mechanical stress can be eliminated or restrained.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings;
fig. 1 shows a schematic diagram of an energy output device.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to preferred embodiments and the accompanying drawings. Like parts in the drawings are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
As shown in fig. 1, an embodiment of the present invention provides an energy output device, which includes an output window 10 and a metal housing, wherein the output window 10 and the metal housing form a sealed cavity, an antenna assembly is disposed in the sealed cavity, and two coupling antennas of the antenna assembly respectively include L-shaped metal segments.
In the energy output device provided by the embodiment, the two coupling antennas lead the high-frequency voltage in the magnetron resonance system into the energy output device, the two L-shaped metal sections play a role in impedance transformation, and the high-frequency electromagnetic waves excited by the antenna assembly are output by the output window. The overall structure of the energy output device provided by the embodiment, in particular to the beneficial effects brought by two L-shaped metal sections are that: the energy output device provided by the embodiment has low reflection coefficient and relatively high structural strength. The low reflection coefficient enables the working stability of the magnetron resonance system to be higher, the high structural strength has higher adaptability to mechanical stress generated in the working process of the magnetron, and adverse effects caused by environmental mechanical stress can be eliminated or restrained. In addition, the energy output device provided by the embodiment has lower requirements on the precision of structural dimensions, and the zigzag impedance transformer formed by combining the L-shaped metal rod and the coupling antenna body has lower requirements on the precision of bending radius and bending position, so that the precision of other dimensions of the device can more easily meet the requirements in the manufacturing process.
In a specific implementation, the antenna assembly in the energy output device provided in this embodiment has an axial antenna output structure. In this embodiment, the antenna assembly specifically includes a first coaxial interface 20 and a second coaxial interface 30 introduced into the sealed cavity, a first coupling antenna body 40, a second coupling antenna body 50, a first L-shaped metal section 60, a second L-shaped metal section 70, a transmitting antenna 80, and a supporting member 90 located in the sealed cavity, the bottom surfaces of the first coupling antenna body 40 and the second coupling antenna body 50 are respectively and fixedly connected with the portions of the first coaxial interface 20 and the second coaxial interface 30 introduced into the sealed cavity (i.e., the bottom surface of the first coupling antenna body 40 is fixedly connected with the portion of the first coaxial interface 20 introduced into the sealed cavity, the bottom surface of the second coupling antenna body 50 is fixedly connected with the portion of the second coaxial interface 30 introduced into the sealed cavity), the bottom surface edges of the transverse end arms of the first L-shaped metal segment and the second L-shaped metal segment are respectively and fixedly connected to the top surfaces of the first coupling antenna body 40 and the second coupling antenna body 50 (i.e., the bottom surface edges of the transverse end arms of the first L-shaped metal segment 60 are fixedly connected to the top surface of the first coupling antenna body 40, the bottom surface edges of the transverse end arms of the second L-shaped metal segment 70 are fixedly connected to the top surface of the second coupling antenna body 50), the top surfaces of the longitudinal end arms of the first L-shaped metal segment 60 and the second L-shaped metal segment 70 are respectively and fixedly connected to the bottom surface edges of both ends of the transmitting antenna 80 (i.e., the top surface of the longitudinal end arm of the first L-shaped metal segment 60 is fixedly connected to the bottom surface edge of one end of the transmitting antenna 80, the top surface of the longitudinal end arm of the second L-shaped metal segment 70 is fixedly connected to the bottom surface edge of the other end of the transmitting antenna 80), the top surface and the bottom surface of the supporting member 90 are respectively and fixedly connected to the bottom surface center of the transmitting antenna 80 and the magnetron tube body (i.e., the top surface of the supporting member 90 is fixedly connected to the bottom surface center of the transmitting antenna 80, the bottom surface of the support 90 is fixedly connected with the magnetron tube).
In the energy output device provided in this embodiment, the first coaxial interface 20, the second coaxial interface 30, the first coupling antenna body 40 and the second coupling antenna body 50 guide the high-frequency voltage in the magnetron resonance system into the energy output device, the first L-shaped metal section 60 and the second L-shaped metal section 70 play a role in impedance transformation, the transmitting antenna 80 is used as a transmitting antenna to excite the high-frequency electromagnetic wave, and the high-frequency electromagnetic wave is output by the output window 10. The supporting member 90 is used for further enhancing the structural strength of the antenna assembly, so as to further enhance the overall structural strength of the energy output device, and the supporting member 90 is located at the center of the energy output device, which is more beneficial to further enhancing the structural strength of the antenna assembly.
In this embodiment, the transmitting antenna 80 is a metal sheet.
In the embodiment, the supporting member 90 is a circular metal rod, and the supporting member 90 in the form of the circular metal rod can further enhance the structural strength of the antenna assembly, and can also realize that the heat energy generated by the transmitting antenna 80 in the process of exciting the high-frequency electromagnetic wave is conducted out of the metal shell.
In particular embodiments, the distance between the two L-shaped metal segments of the coupled antenna is greater than the distance between the coaxial interfaces of the coupled antenna, or the distance between the L-shaped metal segments of the coupled antenna is less than the distance between the coaxial interfaces of the coupled antenna. That is, the lateral distance between the longitudinal end arms of the first L-shaped metal segment 60 and the second L-shaped metal segment 70 is greater than the lateral distance between the first coaxial interface 20 and the second coaxial interface 30, or the lateral distance between the longitudinal end arms of the first L-shaped metal segment 60 and the second L-shaped metal segment 70 is greater than the lateral distance between the first coaxial interface 20 and the second coaxial interface 30, in this embodiment, the lateral distance between the first coaxial interface 20 and the second coaxial interface 30 is equal to the lateral distance between the first coupling antenna body 40 and the second coupling antenna body 50. This structure is more advantageous for the first L-shaped metal segment 60 and the second L-shaped metal segment 70 to achieve the impedance transformation effect.
In specific implementation, the output window, the metal shell and the antenna component are fixedly connected through brazing. In the present embodiment, the bottom surfaces of the first and second coupling antenna bodies 40 and 50 are soldered with the portions of the first and second coaxial interfaces 20 and 30 introduced into the sealed cavity, respectively, the bottom surface edges of the lateral end arms of the first and second L-shaped metal sections 60 and 70 are soldered with the top surfaces of the first and second coupling antenna bodies 40 and 50, respectively, the top surfaces of the longitudinal end arms of the first and second L-shaped metal sections 60 and 70 are soldered with the bottom surface edges of the both ends of the transmitting antenna 80, respectively, and the top and bottom surfaces of the support member 90 are soldered with the bottom surface center of the transmitting antenna 80 and the magnetron tube, respectively. The first L-shaped metal segment 60 and the first coupling antenna body 40 may be integrally formed, and the second L-shaped metal segment 70 and the second coupling antenna body 50 may be integrally formed.
Another embodiment of the present invention provides a magnetron including the energy outputter provided by the above embodiment.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It is further noted that in the description of the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (5)
1. The magnetron energy output device comprises an output window and a metal shell, wherein the output window and the metal shell form a sealed cavity, and an antenna assembly is arranged in the sealed cavity;
the antenna assembly has an axial antenna output structure;
the two coupling antennas respectively comprise two coaxial interfaces for connecting to the anode and a transmitting antenna connected with the other ends of the two coupling antennas;
the energy output device further comprises a support fixed between the metal shell and the transmitting antenna;
the support is a circular metal rod;
the support is positioned at the center of the energy output device.
2. The magnetron energy output device as in claim 1 wherein the distance between the L-shaped metal segments of the two coupled antennas is greater than the distance between the coaxial interfaces of the coupled antennas.
3. The magnetron energy output device as in claim 1 wherein the distance between the L-shaped metal segments of the two coupled antennas is less than the distance between the coaxial interfaces of the coupled antennas.
4. The energy output of claim 1, wherein the output window, metal housing, antenna assembly are fixedly connected by brazing.
5. A magnetron including an energy output as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711496715.0A CN107978504B (en) | 2017-12-31 | 2017-12-31 | Magnetron energy output device and magnetron comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711496715.0A CN107978504B (en) | 2017-12-31 | 2017-12-31 | Magnetron energy output device and magnetron comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107978504A CN107978504A (en) | 2018-05-01 |
| CN107978504B true CN107978504B (en) | 2024-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111146550B (en) * | 2020-01-14 | 2021-02-26 | 四川大学 | Power divider and power distribution assembly based on bottom feed |
| CN112687502A (en) * | 2020-12-30 | 2021-04-20 | 南京大学 | 403MHz ultrahigh-power magnetron leading-out transmission system |
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