CN117613568A - High power dry microwave absorption load - Google Patents
High power dry microwave absorption load Download PDFInfo
- Publication number
- CN117613568A CN117613568A CN202410023621.5A CN202410023621A CN117613568A CN 117613568 A CN117613568 A CN 117613568A CN 202410023621 A CN202410023621 A CN 202410023621A CN 117613568 A CN117613568 A CN 117613568A
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- China
- Prior art keywords
- absorber
- waveguide
- high power
- power dry
- dry microwave
- Prior art date
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 46
- 239000006096 absorbing agent Substances 0.000 claims abstract description 66
- 230000002745 absorbent Effects 0.000 claims abstract description 10
- 239000002250 absorbent Substances 0.000 claims abstract description 10
- 230000007423 decrease Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 229910001868 water Inorganic materials 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 239000000428 dust Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/24—Terminating devices
- H01P1/26—Dissipative terminations
- H01P1/262—Dissipative terminations the dissipative medium being a liquid or being cooled by a liquid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/24—Terminating devices
- H01P1/26—Dissipative terminations
- H01P1/264—Waveguide terminations
Abstract
The invention relates to the field of microwaves, and provides a high-power dry microwave absorption load, which comprises a waveguide assembly and an absorber; the waveguide assembly is connected with the inlet end of the absorber, and one end of the absorber, which is connected with the waveguide assembly, is closed; the absorber is of a hollow structure, a plurality of absorbing sheets are arranged on the inner surface of the absorber, and the plurality of absorbing sheets form a tooth-shaped structure; the height of the absorbent sheet remains unchanged or gradually decreases in the direction of extension of the absorbent body. The microwave absorber is used for solving the defects that dust pollution is generated by a microwave absorber in the prior art, and the risk of cracking exists.
Description
Technical Field
The invention relates to the technical field of microwaves, in particular to a high-power dry type microwave absorption load.
Background
In the field of microwave systems and linear accelerators, it is often necessary to absorb the remaining microwave power, and high-power microwave absorbing loads typically employ ferrite, silicon carbide, graphite or water as the microwave absorber. The water is used as a microwave absorber, the water needs to be isolated by a ceramic window, and the ceramic window is broken under the action of high-power microwaves, so that serious consequences are caused by water leakage to a microwave system. Ferrite, silicon carbide and graphite are used as microwave absorbers, but these materials have disadvantages of low welding success rate, dust pollution under high power, and the like.
Disclosure of Invention
The invention provides a high-power dry-type microwave absorption load which is used for solving the defects that a microwave absorber in the prior art can produce dust pollution and has the risk of breakage.
The invention provides a high-power dry microwave absorption load, which comprises a waveguide assembly and an absorber;
the waveguide assembly is connected with the inlet end of the absorber, and one end of the absorber, which is connected with the waveguide assembly, is closed;
the absorber is of a hollow structure, a plurality of absorbing sheets are arranged on the inner surface of the absorber, and the plurality of absorbing sheets form a tooth-shaped structure;
the height of the absorbent sheet remains unchanged or gradually decreases in the direction of extension of the absorbent body.
According to the high-power dry microwave absorption load provided by the invention, the waveguide assembly comprises a standard waveguide and a matched waveguide;
wherein the matching waveguide is connected with the inlet section of the absorber;
the standard waveguide is provided with an interface flange.
According to the high-power dry microwave absorption load provided by the invention, the absorber comprises a straight tooth section and an inclined tooth section;
in the helical tooth section, the height of the absorption sheet is gradually increased;
in the straight tooth section, the height of the absorbing sheet remains unchanged.
According to the high-power dry microwave absorption load provided by the invention, the height of the absorption sheet at the inlet end of the absorber is the lowest.
According to the high-power dry microwave absorption load provided by the invention, one end of the absorber, which is not connected with the waveguide assembly, is provided with the air extraction opening, the air extraction opening is communicated with the cavity in the absorber, and the air extraction opening is used for vacuumizing or injecting insulating gas into the absorber.
The high-power dry microwave absorption load provided by the invention further comprises a cooling loop, wherein the cooling loop is provided with a water inlet and a water outlet, the water inlet is close to the waveguide assembly, and the water outlet is far away from the waveguide assembly.
According to the high-power dry microwave absorption load provided by the invention, the number of the cooling loops is two.
According to the high-power dry type microwave absorption load provided by the invention, the absorber is made of stainless steel.
According to the high-power dry microwave absorption load provided by the invention, the cross sections of the matching waveguide and the standard waveguide are rectangular, and the lengths of the broadsides of the cross sections of the matching waveguide and the standard waveguide are consistent.
According to the high-power dry microwave absorption load provided by the invention, the length of the matched waveguide is adjustable.
The scheme of this application provides a high-power dry-type microwave absorption load can work and not produce any dust pollution under high power, and does not have the risk that water leaked to microwave system, has excellent peak value and average power absorption ability, and the bandwidth is big, and temperature stability is good, and the cost is low, does not have vulnerable part, and maintenance-free is high, and long service life.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high power dry microwave absorption load according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second embodiment of a high-power dry microwave absorption load according to the present invention.
Wherein:
1-an interface flange; 2-an absorber; 3-a water inlet; 4, an extraction opening; a 5-cooling circuit;
6-straight tooth sections; 7-helical tooth sections; 8-standard waveguide; 9-matching waveguides.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic diagram of a high-power dry-type microwave absorption load according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a second embodiment of a high-power dry microwave absorption load according to the present invention.
As shown in fig. 1 and 2, the present embodiment provides a high-power dry microwave absorption load, including a waveguide assembly and an absorber 2;
the waveguide assembly is connected with the inlet end of the absorber 2, and one end of the absorber 2 connected with the waveguide assembly is sealed;
the absorber 2 is of a hollow structure, a plurality of absorbing sheets are arranged on the inner surface of the absorber, and the plurality of absorbing sheets form a tooth-shaped structure;
the height of the absorbent sheet remains unchanged or gradually decreases in the direction of extension of the absorbent body 2.
In practical application, the structure of the microwave absorber 2 is designed into a comb shape, and the height of the comb teeth is slowly changed to gradually absorb and attenuate the microwave power entering the load, so that the heat and the temperature of the absorber 2 are uniformly distributed.
In implementation, the high-power dry microwave absorption load provided in this embodiment is applicable to absorption of microwave power in different wavebands such as L, S, C, X after the structural form is unchanged and the size is adjusted.
In the embodiment of the present application, the cavity structure is provided in the absorber 2, and the structure has the following structure
The beneficial effects are that:
the self-inductance and self-conductivity properties can be reduced, and the hollow design means that a cavity exists inside the structure absorbing the load, so that the self-inductance and self-conductivity properties of the material are reduced. This helps to reduce reflection and scattering of microwaves in the load and improves the absorption of microwave energy by the absorbing load;
the hollow design provides broadband absorption properties, and the hollow design can enable absorption load to have better absorption properties in a wider frequency range. Through proper cavity structure and size adjustment, the efficient absorption of microwave signals with different frequencies can be realized, so that the absorption load can show good performance in a plurality of frequency bands;
the influence of the dielectric constant and the magnetic permeability is reduced, and the influence of the dielectric constant and the magnetic permeability inside the material on the absorption effect is reduced by the hollow design. The method is beneficial to enabling the absorption load to have better absorption effect on microwave signals with different frequencies and polarization modes;
the manufacturing is simplified, the heat radiation performance is improved, the hollow design enables the structure for absorbing the load to be relatively simple, and the manufacturing and the processing are more convenient. In addition, the hollow structure can also improve the heat dissipation performance of the absorption load and prevent the overheating problem caused by the over high power. Overall, the hollow design enables the microwave absorbing load to better meet the absorption performance and size requirements. By adjusting parameters such as the shape, the size, the position and the like of the cavity, the efficient absorption of microwave signals in a specific frequency range can be realized.
In the exemplary embodiment, the waveguide assembly includes a standard waveguide 8 and a matching waveguide 9;
wherein the matching waveguide 9 is connected to the inlet section of the absorber 2;
the standard waveguide 8 is provided with an interface flange 1.
In an exemplary embodiment, the absorber 2 comprises straight tooth segments 6 and helical tooth segments 7;
in the helical tooth section 7, the height of the absorption sheet is gradually increased;
in the straight tooth section 6, the height of the absorbent sheet remains unchanged.
In the exemplary embodiment, the height of the absorbent sheet at the inlet end of the absorber 2 is lowest.
In an exemplary embodiment, an air extraction opening 4 is formed at an end of the absorber 2, which is not connected to the waveguide assembly, the air extraction opening 4 is communicated with a cavity inside the absorber 2, and the air extraction opening 4 is used for vacuumizing or injecting insulating gas into the absorber 2.
In practice, at the end of the microwave absorption load, the residual microwave power is zero, and a vacuum extraction port 4 is designed, so that the cavity inside the absorber 2 can be evacuated through the vacuum extraction port 4, and insulating gas can be injected into the cavity.
In the exemplary embodiment, the device further comprises a cooling circuit 5, the cooling circuit 5 is provided with a water inlet 3 and a water outlet, the water inlet 3 is positioned close to the waveguide assembly, and the water outlet is positioned away from the waveguide assembly.
The embodiment provides the cooling circuit 5 for the absorber 2, takes away the heat generated by the deposition of the microwaves in the absorber 2 in an external water cooling mode, and the cooling mode also does not generate the phenomenon that the cooling water leaks into a microwave system, so that the safety is high.
In the exemplary embodiment, the number of cooling circuits 5 is two.
In an exemplary embodiment, the absorber 2 is made of stainless steel.
In practical application, by adopting stainless steel material as the microwave absorber 2, the microwave absorber 2 does not generate any dust compared with the absorbers 2 such as silicon carbide, graphite, ferrite and the like, and the risk of leaking water to a microwave system compared with the water absorber 2 does not exist.
In the exemplary embodiment, the cross sections of the matching waveguide 9 and the standard waveguide 8 are rectangular, and the broadside lengths of the cross sections of the matching waveguide 9 and the standard waveguide 8 are identical.
As shown in fig. 2, the interface flange 1 has a cross-sectional dimension L (length) ×w (width) corresponding to the cross-section of one rectangular waveguide.
In an exemplary embodiment, the length of the matching waveguide 9 is adjustable to achieve a good match, and the matching is completed and then sealed to the absorber.
Specifically, the waveguide interface of the microwave absorption load adopts a variable-size matching structure, in practical application, the length of the matching waveguide can be adjusted in the installation process, the installation is completed, the microwave matching can be very conveniently carried out, the reflection coefficient of the load is greatly reduced, the low standing wave coefficient in the working frequency band is realized, the reflection of microwave power is reduced, the power absorption capacity of the load is improved, and the safety and reliability of a microwave system device are ensured. The requirement of processing precision is also reduced, so that the manufacturing cost of the load is reduced, and if the section of matched waveguide is not provided, the standing wave ratio after the whole structure is processed does not reach the standard, and the whole structure is difficult to modify. And the length of the matched waveguide is adjusted, so that the requirement on processing precision is greatly reduced.
When the high-power dry-type microwave absorption load is used, after microwave power enters the high-power dry-type microwave absorption load, the microwave power firstly passes through the standard waveguide 8 and then enters the matching waveguide 9. The matching waveguide 9 is also rectangular in cross section, the rectangular having a wide side dimension that is consistent with the standard waveguide 8 and a long side dimension that is not consistent with the standard waveguide 8. After passing through the matching waveguide 9, the microwave power enters the stainless steel absorber 2. The stainless steel absorber 2 is divided into an upper part and a lower part. The stainless steel absorber 2 is similar to the teeth of a comb in structure, the distance between teeth and the tooth width are kept unchanged all the time, but the height of the teeth is changed, and the stainless steel absorber is divided into two sections, namely, a section of oblique teeth and a section of straight teeth. The height of the helical teeth is gradually changed. Such a structure is to allow microwave power to be gradually absorbed so that power deposition and temperature rise are uniform. To the rear end of the straight tooth, the microwave power decays to zero. The suction opening 4 can be used for vacuumizing and can also be used for filling insulating gas. The cooling circuit 5 is connected with cooling water, and the water pipe close to the interface flange 1 is an inlet, and the water pipe far away from the interface flange 1 is an outlet. The cooling water passes through the water tank to take away the heat deposited on the absorber 2 by the microwave power. The cooling circuit 5 is divided into an upper part and a lower part, and the upper stainless steel absorber 2 and the lower stainless steel absorber 2 are cooled respectively, wherein the cooling circuits of the upper part and the lower part are both of cuboid structures.
The device embodiments described above are merely illustrative, and it should finally be stated that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The high-power dry microwave absorption load is characterized by comprising a waveguide assembly and an absorber;
the waveguide assembly is connected with the inlet end of the absorber, and one end, connected with the waveguide assembly, of the absorber is sealed;
the absorber is of a hollow structure, a plurality of absorbing sheets are arranged on the inner surface of the absorber, and the plurality of absorbing sheets form a tooth-shaped structure;
the height of the absorbent sheet is kept constant or gradually decreases along the extending direction of the absorbent body.
2. The high power dry microwave absorbing load of claim 1, wherein the waveguide assembly comprises a standard waveguide and a matching waveguide;
wherein the matching waveguide is connected to the inlet section of the absorber;
the standard waveguide is provided with an interface flange.
3. The high power dry microwave absorbing load of claim 1, wherein the absorber comprises straight tooth sections and skewed tooth sections;
in the helical tooth section, the height of the absorption sheet is gradually increased;
in the straight tooth section, the height of the absorbing sheet is kept unchanged.
4. A high power dry microwave absorbing load as claimed in claim 3, wherein the height of the absorbing sheet at the inlet end of the absorber is lowest.
5. The high power dry microwave absorbing load of claim 1, wherein an extraction port is provided at an end of the absorber not connected to the waveguide assembly, the extraction port being in communication with a cavity inside the absorber, the extraction port being for evacuating or injecting an insulating gas into the absorber.
6. The high power dry microwave absorbing load of claim 1, further comprising a cooling circuit, the cooling circuit having a water inlet and a water outlet, the water inlet being positioned proximate the waveguide assembly and the water outlet being positioned distal the waveguide assembly.
7. The high power dry microwave absorbing load of claim 1, wherein the number of cooling loops is two.
8. The high power dry microwave absorbing load of claim 1, wherein the absorber is stainless steel.
9. The high power dry microwave absorbing load of claim 2 wherein the cross sections of the matching waveguide and the standard waveguide are rectangular, the broadside lengths of the cross sections of the matching waveguide and the standard waveguide being identical.
10. The high power dry microwave absorbing load of claim 2, wherein the length of the matching waveguide is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410023621.5A CN117613568A (en) | 2024-01-08 | 2024-01-08 | High power dry microwave absorption load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410023621.5A CN117613568A (en) | 2024-01-08 | 2024-01-08 | High power dry microwave absorption load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117613568A true CN117613568A (en) | 2024-02-27 |
Family
ID=89951856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410023621.5A Pending CN117613568A (en) | 2024-01-08 | 2024-01-08 | High power dry microwave absorption load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117613568A (en) |
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2024
- 2024-01-08 CN CN202410023621.5A patent/CN117613568A/en active Pending
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