CN106450616B - Radio frequency cavity device, cover plate thereof and design method of cover plate - Google Patents
Radio frequency cavity device, cover plate thereof and design method of cover plate Download PDFInfo
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- CN106450616B CN106450616B CN201610663294.5A CN201610663294A CN106450616B CN 106450616 B CN106450616 B CN 106450616B CN 201610663294 A CN201610663294 A CN 201610663294A CN 106450616 B CN106450616 B CN 106450616B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
Abstract
The invention provides a radio frequency cavity device, a cover plate thereof and a design method of the cover plate. The radio frequency cavity device and the cover plate thereof provided by the invention can reduce the assembling and debugging working hours and improve the production efficiency when the screw is installed and adjusted; the generation of metal debris can be reduced, and the passive intermodulation level and the power capacity can be improved. The invention has low production cost, reduces the height of the filter, is easy to connect the active circuit board and the filter when needed, forms an active and passive integrated module and expands the functions of the filter.
Description
Technical Field
The invention relates to the field of mobile communication, in particular to a radio frequency cavity device, a cover plate thereof and a design method of the cover plate.
Background
Currently, radio frequency cavity devices (e.g., coaxial cavity filters) are widely used in mobile communication systems. In order to compensate for machining and assembling tolerance, a tuning screw is adopted for debugging so as to achieve excellent technical indexes.
When the existing technical scheme adopts the tuning screw to debug, a nut is needed to be used for opening a threaded hole and locking the screw on the corresponding position of the cover plate, and the tuning screw is rotated to adjust the length of the tuning screw penetrating into the cavity, so that the performance of the cavity filter is adjusted.
However, metal debris generated during frequent debugging, and the locking degree of threads and nuts on the screw rod can directly or indirectly affect the passive interaction and power capacity, and the reliability of the radio frequency cavity device is reduced. In addition, the cover plate is provided with too many tuning screws, the tuning screws can be loosened in the production process, the transportation and moving process and the like, so that the performance parameters of the radio frequency cavity device are changed, and the assembly and debugging time is long. Therefore, the performance parameters of the radio frequency cavity device are influenced by the existing technical scheme, the production efficiency is low, and the production cost is high.
Disclosure of Invention
In view of the above problems, the present invention provides a radio frequency cavity device and a cover plate thereof, which can reduce assembly and debugging man-hours, improve production efficiency, reduce the generation of metal debris, and improve passive intermodulation level and power capacity.
Correspondingly, the invention also provides a design method of the cover plate of the radio frequency cavity device, which is used for replacing part or all of the threaded adjustable tuning screw rods with fixed coupling rods.
In order to solve the problems, the invention adopts the following technical scheme:
the invention provides a radio frequency cavity device cover plate which comprises a plate body, a plurality of non-adjustable fixed coupling rods fixed on the lower surface of the plate body and a plurality of adjustable tuning screws with threads, wherein the tuning screws with threads penetrate into the lower surface of the plate body through tuning screw holes in the plate body.
Preferably, the fixed coupling rod and the plate body are integrally formed, or are fixed by welding methods such as brazing, laser welding and electron beam welding.
Specifically, the upper end of the tuning screw is locked with a nut positioned on the upper surface of the plate body, and the length of the tuning screw penetrating into the cavity can be adjusted by rotating the adjustable tuning screw.
Specifically, the length of the fixed coupling rod is fixed and is not adjustable, and the lengths of the fixed coupling rods can be different.
Another embodiment of the present invention further provides a cover plate for a rf cavity device, which includes a plate body and a plurality of non-adjustable fixed coupling rods fixed on a lower surface of the plate body.
Preferably, the fixed coupling rod and the plate body are integrally formed, or are fixed by welding methods such as brazing, laser welding and electron beam welding.
Specifically, the length of the fixed coupling rod is fixed and is not adjustable, and the lengths of the fixed coupling rods can be different.
The invention also provides a radio frequency cavity device, which comprises a bottom plate for limiting the cavity, a side wall surrounding the bottom plate, a cover plate arranged at the upper end of the side wall, and a component and/or a structural member arranged in the cavity, and is characterized in that the cover plate adopts any one of the radio frequency cavity device cover plates.
The invention also provides a design method of the cover plate of the radio frequency cavity device, which comprises the following steps:
step one, a simulation stage, distinguishing a sensitive tuning screw and an insensitive tuning screw;
step two, in the debugging stage, the tuning screw which is relatively insensitive is further confirmed through a conclusion of debugging and verifying simulation; after the confirmation, the length of the insensitive tuning screw is fixed, whether the index requirement can be met by debugging the lengths of other unfixed tuning screws is verified, and the number, the length and the positions of the fixed tuning screws are revised and confirmed in combination with the debugging result;
step three, a small batch sample verification stage, wherein whether the quantity, the length and the position of the fixed tuning screw are accurate is confirmed through the small batch sample verification and debugging stage;
if the result is verified to be accurate in the third step, designing and shaping the product; and if the verification result in the step three is not accurate, repeating the step one to the step three, and repeating the steps to finally determine the layout of the adjustable tuning screws and the non-adjustable tuning screws on the cover plate and determine the length of each non-adjustable tuning screw.
The non-adjustable tuning screw is a fixed coupling rod after design and sizing.
The upper end of the adjustable tuning screw is locked with a nut positioned on the upper surface of the plate body, and the length of the adjustable tuning screw penetrating into the cavity can be adjusted by rotating the adjustable tuning screw.
The fixed coupling rod and the cover plate body are integrally formed, or are fixed through welding modes such as brazing, laser welding and electron beam welding.
The design method of the cover plate of the radio frequency cavity device further comprises the following steps:
and debugging the set cover plate until the debugging result reaches a reference index, wherein the reference index is a performance index reference value of the radio frequency cavity device.
The reference index includes any one or more of the following items: frequency band, insertion loss, return loss, out-of-band rejection, etc.
Compared with the prior art, the invention at least has the following advantages:
the part (or all) of the tuning screw rod with the adjustable threads in the existing scheme is replaced by the fixed coupling rod with the nonadjustable fixed length, and the fixed coupling rod is integrated with the cover plate in a milling or brazing mode, a laser welding mode, an electron beam welding mode and the like, cannot move, and reduces (or eliminates) the generation of metal chips in the adjusting process; the radio frequency cavity device cover plate can reduce the assembling and debugging working hours and improve the production efficiency; the radio frequency cavity device using the radio frequency cavity device cover plate improves the passive intermodulation level and reduces the risk of power ignition; the manufacturing method of the cover plate of the radio frequency cavity device reduces material cost, processing cost and management cost. For the situation that only the fixed coupling rod is arranged on the cover plate of the radio frequency cavity device, the outer surface of the cover plate is smooth due to no need of nut fixation, so that the height of the filter can be reduced, and the whole volume of the radio frequency device is obviously reduced. Meanwhile, the active circuit board is easily connected with the filter when needed, an active and passive integrated module is formed, and the functions of the filter are expanded.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic bottom surface view of an embodiment of a cover plate of the RF cavity device of the present invention;
FIG. 2 is a schematic top view of an embodiment of a cover plate for a radio frequency cavity device of the present invention;
FIG. 3 is a schematic bottom view of a second embodiment of a cover plate for a radio frequency cavity device of the present invention;
FIG. 4 is a schematic top view of a second embodiment of a cover plate for a radio frequency cavity device of the present invention;
fig. 5 shows a flowchart of an embodiment of a method for manufacturing a cover plate of a radio frequency cavity device according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
Referring to fig. 1 and 2, the present invention provides an rf cavity device cover plate 100, wherein the rf cavity device cover plate 100 includes a plate body 101, a plurality of fixed coupling rods 103 extending from a lower surface of the plate body 101, and a plurality of adjustable tuning screws 104 with threads penetrating into the lower surface of the plate body 101 through tuning screw holes 102 of the plate body 101.
Specifically, the fixed coupling rod 103 is made of a rod with a smooth surface, and the term "smooth surface" means that the surface of the rod is not threaded, and the surface of the rod is substantially flat. The free end of the rod is preferably flat or round. The fixed coupling rod 103 is connected with the plate body 101 in a permanent connection mode, preferably, the fixed coupling rod 103 and the plate body 101 are integrally formed and are integrated with a cover plate mainly through direct milling; the fixed coupling rod 103 and the plate body 101 can also be fixed by welding methods such as brazing, laser welding, electron beam welding and the like. Since the fixed coupling rod 103 is integrally formed or fixed by welding with the plate body 101, it is not adjustable and has a fixed length. Therefore, the fixed coupling rod 103 has the advantages of avoiding debugging, eliminating the generation of metal scraps, reducing the assembly and debugging working hours and improving the production efficiency.
The tuning screw 104 is mounted on the plate body 101 by a nut 105. Specifically, the surface of the tuning screw 104 is tapped with an external thread, the lower end of the tuning screw 104 penetrates through the plate body 101 and extends out from the lower surface of the plate body 101, and the extended part of the tuning screw 104 is used for extending into the cavity of the cavity device; the upper end of the tuning screw 104 remains above the upper surface of the plate body 101 and is locked by means of a locking nut 105, it being apparent that the locking nut 105 and the inner wall of the tuning screw bore 102 are tapped with an internal thread matching the external thread of the tuning screw 104. The length of the adjustable tuning screw 104 penetrating into the cavity can be adjusted by rotating the adjustable tuning screw, so that the performance parameters of the radio frequency cavity device can be adjusted. Preferably, the material of the tuning screw 104 may be a metal material or an alloy material such as aluminum, copper, etc.
According to the embodiment, the adjustable tuning screw part with threads in the existing scheme is replaced by the fixed coupling rod with the nonadjustable fixed length, the fixed coupling rod is integrated with the cover plate by adopting milling or brazing, laser welding, electron beam welding and other processes, the debugging is impossible, and the generation of metal scraps is reduced; the assembly and debugging working hours are reduced, and the production efficiency is improved; the passive intermodulation level is improved, and the risk of power sparking is reduced. Meanwhile, the active circuit board is easily connected with the filter when needed, an active and passive integrated module is formed, and the functions of the filter are expanded.
Referring to fig. 3 and 4, in another embodiment of the present invention, in the embodiment, the fixed coupling rods 103 are all disposed on the rf cavity cover plate 100. In contrast to the previous embodiments (as shown in fig. 1 and 2), all the coupling rods on the rf cavity cover plate 100 in this embodiment are non-adjustable fixed coupling rods 103. For the fixing processing of the fixed coupling rod 103, the integration with the cover plate can be realized by adopting milling processing or welding modes such as brazing, laser welding, electron beam welding and the like, and debugging cannot be performed. The fixed coupling rods 103 are fixed in length and are not adjustable, and the lengths of a plurality of the fixed coupling rods 103 may be different, the lengths being determined based on simulation and debug verification.
In conclusion of the above embodiments, the radio frequency cavity device cover plate eliminates the generation of metal debris by replacing all the threaded adjustable tuning screws in the existing scheme with fixed coupling rods with non-adjustable fixed lengths; the assembly and debugging working hours are reduced, and the production efficiency is improved; the passive intermodulation level is improved, and the risk of power sparking is reduced. In addition, the cover plate is not fixed by nuts, the outer surface is smooth, the height of the filter can be reduced, and the integral volume of the filter is obviously reduced.
The invention also provides a radio frequency cavity device, which comprises a bottom plate for limiting a cavity, a side wall surrounding the bottom plate, a cover plate 100 arranged at the upper end of the side wall, and a component and/or a structural member arranged in the cavity, wherein the cover plate is the cover plate 100 of the radio frequency cavity device in any one of the embodiments.
Referring to fig. 5, the present invention further provides a design method of a cover plate of a radio frequency cavity device, and in a specific embodiment, the design method includes the following steps:
step one, a simulation stage, distinguishing a sensitive tuning screw and an insensitive tuning screw; at a certain position, if the coupling amount is slightly changed and the influence on the performance index is small, the screw is considered to be an insensitive tuning screw, and a fixed coupling rod is adopted; otherwise, the tuning screw is considered to be a sensitive tuning screw, and an adjustable tuning screw is adopted.
Step two, in the debugging stage, the tuning screw which is relatively insensitive is further confirmed through a conclusion of debugging and verifying simulation; after the confirmation, the length of the insensitive tuning screw is fixed, whether the index requirement can be met by debugging the lengths of other unfixed tuning screws is verified, and the number, the length and the positions of the fixed tuning screws are revised and confirmed in combination with the debugging result;
step three, a small batch sample verification stage, wherein whether the quantity, the length and the position of the fixed tuning screw are accurate is confirmed through the small batch sample verification and debugging stage;
if the result is verified to be accurate in the third step, designing and shaping the product; and if the verification result in the third step is not accurate, repeating the first step to the third step, and repeating the steps to finally determine the layout of the adjustable tuning screw 104 and the non-adjustable tuning screw 103 on the cover plate and the length of each non-adjustable tuning screw.
Specifically, the non-adjustable tuning screw is designed to be the fixed coupling rod 103 after being fixed. The upper end of the adjustable tuning screw 104 is locked by a nut located on the upper surface of the plate, and the length of the adjustable tuning screw 104 penetrating into the cavity can be adjusted by rotating the adjustable tuning screw.
Preferably, the fixing coupling rod 103 is integrally formed with the plate body 101 of the cover plate, or is fixed by welding means such as brazing, laser welding, and electron beam welding. Preferably, the fixed coupling rod 103 and the plate body 101 are integrally formed, and are integrated with the cover plate mainly by direct milling; alternatively, the fixing coupling rod 103 and the plate body 101 may be fixed by welding, such as brazing, laser welding, and electron beam welding. Since the fixed coupling rod 103 is integrally formed or fixed by welding with the plate body 101, it is not adjustable and has a fixed length. Therefore, the fixed coupling rod 103 has the advantages of avoiding debugging, eliminating the generation of metal scraps, reducing the assembly and debugging working hours and improving the production efficiency.
In another embodiment of the present invention, the method for designing a cover plate of an rf cavity device further includes a step of:
and step four, debugging the set cover plate until the debugging result reaches a reference index, wherein the reference index is a performance index reference value of the radio frequency cavity device. The reference index includes any one or more of the following items: frequency band, insertion loss, return loss, out-of-band rejection, etc.
By combining the above examples, the implementation of the design method for the cover plate of the radio frequency cavity device provided by the invention can reduce the assembly and debugging time and improve the production efficiency; and part (or all) tuning screws are fixed and are free from debugging, so that the generation of metal debris can be reduced (or eliminated), the passive intermodulation level is improved, and the risk of power ignition is reduced. In addition, the material cost, the processing cost and the management cost can be reduced; the fixed coupling rod fixed by the welding modes such as milling or brazing, laser welding, electron beam welding and the like has no threads, so that the passive intermodulation level and the power capacity can be improved. For the situation that only the fixed coupling rod is arranged on the cover plate of the radio frequency cavity device, the outer surface of the cover plate is smooth because the cover plate does not need to be fixed by a nut, so that the height of the filter can be reduced, and the integral volume of the filter is obviously reduced; meanwhile, the active circuit board is easily connected with the filter when needed, an active and passive integrated module is formed, and the functions of the filter are expanded.
In the above examples, the structure and principle of the rf cavity device cover plate of the present invention are described by taking a cavity filter as an example, and the application environment of the rf cavity device cover plate is not limited. In other words, the cover plate of the radio frequency cavity device can be used in any radio frequency cavity device to solve the problems of low production efficiency, high cost, poor performance and the like.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (15)
1. A design method of a cover plate of a radio frequency cavity device is characterized by comprising the following steps:
step one, a simulation stage, distinguishing a sensitive tuning screw and an insensitive tuning screw;
step two, in the debugging stage, the tuning screw which is relatively insensitive is further confirmed through a conclusion of debugging and verifying simulation; after the confirmation, the length of the insensitive tuning screw is fixed, whether the index requirement can be met by debugging the lengths of other unfixed tuning screws is verified, and the number, the length and the positions of the fixed tuning screws are revised and confirmed in combination with the debugging result;
step three, a small batch sample verification stage, wherein whether the quantity, the length and the position of the fixed tuning screw are accurate is confirmed through the small batch sample verification and debugging stage;
if the result is verified to be accurate in the third step, designing and shaping the product; and if the verification result in the step three is not accurate, repeating the step one to the step three, and repeating the steps to finally determine the layout of the adjustable tuning screws and the non-adjustable tuning screws on the cover plate and determine the length of each non-adjustable tuning screw.
2. The method of claim 1, wherein the non-adjustable tuning screw is a fixed coupling rod after design sizing.
3. The method of claim 1, wherein the adjustable tuning screw is locked at its upper end by a nut located on the upper surface of the plate body, and the length of the tuning screw extending into the cavity is adjusted by rotating the adjustable tuning screw.
4. The method for designing a cover plate of a radio frequency cavity device according to claim 1, wherein the fixing coupling rod is integrally formed with the cover plate body, or is fixed by soldering, laser welding or electron beam welding.
5. The method of designing a cover plate for a rf cavity device of claim 1, further comprising:
and debugging the set cover plate until the debugging result reaches a reference index, wherein the reference index is a performance index reference value of the radio frequency cavity device.
6. The method for designing a cover plate of a radio frequency cavity device according to claim 5, wherein the reference index includes any one or more of the following:
frequency band, insertion loss, return loss, out-of-band rejection.
7. A cover plate for RF cavity device, which is designed by the method of any one of claims 1 to 6, and comprises a plate body, a plurality of non-adjustable fixed coupling rods fixed on the lower surface of the plate body, and a plurality of screw-thread adjustable tuning screws penetrating into the lower surface of the plate body through tuning screw holes on the plate body, wherein the non-adjustable tuning screws are insensitive tuning screws.
8. The rf cavity device cover plate of claim 7, wherein the fixing coupling rod is integrally formed with the plate body, or fixed by soldering, laser welding, or electron beam welding.
9. The rf cavity device cover plate of claim 7, wherein the tuning screw is locked at its upper end by a nut on the upper surface of the plate body, and the length of the tuning screw extending into the cavity is adjustable by rotating the adjustable tuning screw.
10. The rf cavity device cover plate of claim 7, wherein the fixed coupling rods are fixed in length, non-adjustable, and a plurality of the fixed coupling rods may be different in length.
11. A cover plate of a radio frequency cavity device, which is designed by adopting the design method of the cover plate of the radio frequency cavity device as claimed in any one of claims 1 to 6, and is characterized by comprising a plate body and a plurality of non-adjustable fixed coupling rods fixed on the lower surface of the plate body.
12. The rf cavity device cover plate of claim 11, wherein the fixing coupling rod is integrally formed with the plate body, or fixed by soldering, laser welding, or electron beam welding.
13. The rf cavity device cover plate of claim 11, wherein the fixed coupling rods are fixed in length, non-adjustable, and a plurality of the fixed coupling rods may be different in length.
14. A radio frequency cavity device comprising a bottom plate defining a cavity, a side wall surrounding the bottom plate, a cover plate disposed at an upper end of the side wall, and a component and/or a structural member disposed in the cavity, wherein the cover plate is the radio frequency cavity device cover plate as claimed in any one of claims 7 to 13.
15. A radio frequency cavity device, which comprises a bottom plate for limiting a cavity, a side wall surrounding the bottom plate, a cover plate arranged at the upper end of the side wall, and a component and/or a structural member arranged in the cavity, wherein the cover plate is obtained by adopting the design method of the cover plate of the radio frequency cavity device as claimed in any one of claims 1 to 6.
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| CN201610663294.5A CN106450616B (en) | 2016-08-12 | 2016-08-12 | Radio frequency cavity device, cover plate thereof and design method of cover plate |
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| CN201610663294.5A CN106450616B (en) | 2016-08-12 | 2016-08-12 | Radio frequency cavity device, cover plate thereof and design method of cover plate |
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| CN106450616A CN106450616A (en) | 2017-02-22 |
| CN106450616B true CN106450616B (en) | 2020-07-28 |
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| CN108023149A (en) * | 2017-11-03 | 2018-05-11 | 东莞鸿爱斯通信科技有限公司 | Cavity filter and communication device |
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Effective date of registration: 20200117 Address after: 510730 No. 6, layered Road, Guangzhou economic and Technological Development Zone, Guangdong Applicant after: Jingxin Communication Technology (Guangzhou) Co., Ltd. Address before: 510663 No. 6, layered Road, Guangzhou economic and Technological Development Zone, Guangdong Applicant before: Jingxin Communication Technology (Guangzhou) Co., Ltd. Applicant before: Jingxin Communication System (China) Co., Ltd. Applicant before: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. |
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