Patent Grant
11562873
The present disclosure is based upon and claims priority to Chinese Patent Application Nos. 202021396792.6 and 202010682116.3, filed on Jul. 15, 2020, the entire contents of which are incorporated by reference herein.
The present disclosure relates to a field of microwave radiation sources technology, and more particularly to a magnetron.
Magnetron has advantages of simple structure, small volume, light weight, low cost and the like, and is widely applied to fields of national defense, industry, agriculture, medical treatment and the like as a high-power microwave source.
In order to realize high-efficiency microwave power combining, the related art adopts an injection phase locking technology to input a stable small signal into a magnetron, and frequency and phase of the magnetron output signal are locked by controlling frequency and phase of the small signal. However, the implementation of the above technology requires addition of a complex external injection phase locking system, which is costly and bulky, and weakens the advantages of the magnetron as the microwave source.
The present disclosure seeks to solve at least one of the problems existing in a related art to at least some extent.
To this end, embodiments of the present disclosure provides a magnetron, which may achieve electromagnetic field coupling inside the magnetron, thereby improving output power of the magnetron without adopting a complex external injection phase locking system.
The magnetron according to embodiments of the present disclosure includes a tube body having a plurality of first cavities formed therein, the adjacent first cavities being communicated with each other; a plurality of anodes arranged in the first cavities and including a cylinder and a plurality of vanes arranged in the cylinder, the vanes extending along a radial direction of the cylinder, outer ends of the vanes being connected with an inner circumferential surface of the cylinder, the vanes being arranged along a circumferential direction of the cylinder at intervals, resonant cavities being formed between the adjacent vanes, the resonant cavities including a first resonant cavity and a second resonant cavity, the first resonant cavity alternately arranged along the circumferential direction of the cylinder, the cylinder being provided with a plurality of coupling slots arranged along the circumferential direction of the cylinder at intervals, and the coupling slots running through the cylinder along the radial direction of the cylinder to communicate the first resonant cavity with the first cavity; a plurality of cathodes arranged in the cylinder and coaxially arranged with the cylinder, the cathodes and inner ends of the vanes being spaced in the radial direction of the cylinder, and at least part of the cathodes being located inside the plurality of vanes; an output slot being defined on the tube body for communicating the first cavity with an outside.
The magnetron according to the embodiments of the present disclosure is provided with a plurality of cathodes and anodes, such that internal energy storage of the magnetron is increased, and output power of the magnetron is improved. The electromagnetic fields in the plurality of first cavities are coupled inside the magnetron, and the coupled electromagnetic fields lock output magnetron frequency without adopting a complex external injection phase-locking system, thereby reducing input cost of equipment and reducing volume of equipment.
Embodiments of the present disclosure are further described below in detail, examples of the embodiments are shown in accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, are merely used to explain the present disclosure, and cannot be construed as a limit to the present disclosure.
As shown in
A plurality of first cavities 2 are defined in the tube body 1, and the adjacent first cavities 2 are communicated with each other. As shown in
The anode 3 is arranged in the first cavities 2 and includes a cylinder 301 and a plurality of vanes 302 arranged in the cylinder 301. The vanes 302 extend along a radial direction of the cylinder 301, outer ends of the vanes 302 are connected with an inner circumferential surface of the cylinder 301, the plurality of vanes 302 are arranged at intervals along a circumferential direction of the cylinder 301, and a resonant cavity is formed between the adjacent vanes 302. The plurality of resonant cavities include a first resonant cavity 303 and a second resonant cavity 304 alternately arranged along the circumferential direction of the cylinder 301. The cylinder 301 is provided with a plurality of coupling slots 305 arranged along the circumferential direction of the cylinder 301 at intervals, and the coupling slots 305 run through the cylinder 301 along the radial direction of the cylinder 301 to communicate the first resonant cavity 303 with the first cavity 2.
As shown in
The cathode 4 is arranged in the cylinder 301 and is coaxial with the cylinder 301, the cathode 4 and inner ends of the vanes 302 are spaced apart in the radial direction of the cylinder 301, and at least part of the cathode 4 is located inside the plurality of vanes 302.
The tube body 1 is also defined with an output slot 5 for communicating the first cavity 2 with an outside. Electromagnetic field in the tube body 1 is output to the outside of the tube body 1 through the output slot 5. As shown in
The magnetron according to embodiments of the present disclosure is provided with a plurality of cathodes and anodes, such that internal energy storage of the magnetron is increased, and output power of the magnetron is improved. The electromagnetic fields in the plurality of first cavities are coupled inside the magnetron, and the coupled electromagnetic fields lock output magnetron frequency without adopting a complex external injection phase-locking system, thereby reducing input cost of equipment and reducing volume of equipment.
In some embodiments, the cylinder 301 includes a first end and a second end in its axial direction (the up-down direction shown in
The magnetron further includes a first magnetic pole 6 and a second magnetic pole 7, magnetism of the first magnetic pole 6 is different from that of the second magnetic pole 7, and at least part of the first magnetic pole 6 is fitted in the cylinder 301 through the first end 3011 of the cylinder, and at least part of the second magnetic pole 7 is fitted in the cylinder 301 through the second end 3012 of the cylinder. The first magnetic pole 6 and the second magnetic pole 7 are arranged to form a static magnetic field in the cylinder 301 in the up-down direction. Electrons generate cycloidal motion under action of electric field and static magnetic field and gradually move to the resonant cavity.
As shown in
In some embodiments, the tube body 1 is further defined with an output port 8 communicating the output slot 5 with the outside, and there are at least one output slot 5. The output slot 5 and the output port 8 are configured to output microwave signals.
As shown in
In some embodiments, there are a plurality of output slots 5, and the plurality of output slots 5 are directly communicated with the plurality of first cavities 2 in one-to-one correspondence. As shown in
In some embodiments, the tube body 1 is further provided with a connecter 9 communicated with the output port 8, and the connecter 9 is communicated with the adjacent output slots 5. The magnetron further includes a combiner 10 arranged in the connecter 9. As shown in
In some embodiments, the combiner 10 includes an E-T structure. It may be understood that the structure of the combiner 10 in the present application is not limited thereto. For example, the structure of the combiner 10 may also be H-T or magic T.
In some embodiments, the tube body 1 further includes a channel 11, the adjacent first cavities 2 are communicated through the channel 11, and the output slots 5 are directly communicated with the channel 11. As shown in
In some embodiments, the magnetron further includes a tuner 12 configured for adjusting microwave frequency, the tuner 12 is arranged in the first cavity 2 and spaced apart from the anodes 3, and is movable along the axial direction of the cylinder 301 (up-down direction shown in
In some embodiments, there are a plurality of tuners 12 arranged at intervals and arranged between adjacent cylinders 301. As shown in
In some other embodiments, as shown in
The magnetrons according to some specific examples of the present disclosure will be described below with reference to
As shown in
As shown in
The two first cavities 2 are arranged at intervals in the left-right direction and communicated with each other, and two anodes are correspondingly arranged in the two first cavities 2. The anodes include a cylinder 301 and a plurality of vanes 302 arranged in the cylinder 301. The vanes 302 extend along a radial direction of the cylinder 301, and outer ends of the vanes 302 are connected with an inner circumferential surface of the cylinder 301. The plurality of vanes 302 are arranged at intervals along the circumferential direction of the cylinder 301, and resonant cavities are formed between the adjacent vanes 302. The plurality of resonant cavities include first resonant cavities 303 and second resonant cavities 304 alternately arranged along the circumferential direction of the cylinder 301. The cylinder 301 is defined with a plurality of coupling slots 305 arranged at intervals along the circumferential direction of the cylinder 301, and the coupling slots 305 run through the cylinder 301 along the radial direction of the cylinder 301 to communicate the first resonant cavity 303 with the first cavity 2. Furthermore, the coupling slots 305 extend in the up-down direction, and there are a plurality of coupling slots 305 directly communicated with the first resonant cavities 303 in a one-to-one correspondence.
Two cathodes 4 are correspondingly arranged in the two cylinders 301, and the cathodes 4 are coaxially arranged with the cylinders 301. The cathodes 4 are spaced apart from inner ends of the vanes 302 in the radial direction of the cylinders 301, and at least part of the cathodes 4 are located inside the plurality of vanes 302.
As shown in
The cylinder 301 includes a first end and a second end in an axial direction, and the first end 3011 (upper end of the cylinder shown in
The magnetron further includes a tuner 12 configured for adjusting microwave frequency. The tuner 12 is arranged in the first cavity 2 and the anodes 3 are spaced apart, and is movable along the axial direction of the cylinder 301 (the up-down direction shown in
The magnetrons according to other specific exemplary of embodiments of the present disclosure will be described below with reference to
As shown in
There are two output slots 5 extending along a radial direction of the first cavities 2, and there are two first cavities 2, two anodes and two cathodes. The two first cavities 2 are arranged at intervals in a left-right direction and communicated with each other. The left output slot 5 is communicated with the left first cavity 2, and the right output slot 5 is communicated with the right first cavity 2. The tube body 1 is also provided with a connecter 9 communicating with output ports 8, the left output port 8 is communicated with the left inlet of the connecter 9, and the right output port 8 is communicated with the right inlet of the connecter 9. The magnetron further includes a combiner 10 arranged in the connecter 9.
Other structures and operations of the magnetron shown in
The magnetrons according to other specific exemplary of embodiments of the present disclosure will be described below with reference to
As shown in
There are one output slot 5, two first cavities 2, two anodes and two cathodes. The two first cavities 2 are arranged at intervals in a left-right direction and are communicated through a channel 11, and the output slot 5 is directly communicated with a channel 11. Cross section of the channel 11 substantially is in rectangular shape, and the joint between the channel 11 and the first cavity 2 is an arc transition section connected with an arc shaped section.
Other structures and operations of the magnetron shown in
The magnetrons according to other specific exemplary of embodiments of the present disclosure will be described below with reference to
As shown in
Other structures and operations of the magnetron shown in
The magnetrons according to other specific exemplary of embodiments of the present disclosure will be described below with reference to
As shown in
As shown in
Other structures and operations of the magnetron shown in
In the specification, it is to be understood that terms such as “central,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present invention be constructed or operated in a particular orientation.
In addition, terms such as “first” and “second” are used herein for purposes of description and are not intended to indicate or imply relative importance or significance. Furthermore, the feature defined with “first” and “second” may include one or more this feature distinctly or implicitly. In the description of the present disclosure, “a plurality of” means two or more than two, unless specified otherwise.
In the present invention, unless specified or limited otherwise, the terms “mounted,” “connected,” “coupled,” “fixed” and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements, which may be understood by those skilled in the art according to specific situations.
In the present invention, unless specified or limited otherwise, a structure in which a first feature is “on” or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may further include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween. Furthermore, a first feature “on,” “above,” or “on top of” a second feature may include an embodiment in which the first feature is right or obliquely “on,” “above,” or “on top of” the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature “below,” “under,” or “on bottom of” a second feature may include an embodiment in which the first feature is right or obliquely “below,” “under,” or “on bottom of” the second feature, or just means that the first feature is at a height lower than that of the second feature.
Reference throughout this specification to “an embodiment,” “some embodiments,” “an example,” “a specific example,” or “some examples,” means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. The appearances of the above phrases in various places throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. In addition, different embodiments or examples and features of different embodiments or examples described in the specification may be combined by those skilled in the art without mutual contradiction.
Although embodiments of present disclosure have been shown and described above, it should be understood that above embodiments are just explanatory, and cannot be construed to limit the present disclosure, for those skilled in the art, changes, alternatives, and modifications may be made to the embodiments without departing from the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202010682116.3 | Jul 2020 | CN | national |
| 202021396792.6 | Jul 2020 | CN | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4833367 | Harada | May 1989 | A |
| 20100163552 | Shim | Jul 2010 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| 20220020553 A1 | Jan 2022 | US |
