CN114243241A - Miniaturized panel beating combiner - Google Patents
Miniaturized panel beating combiner Download PDFInfo
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- CN114243241A CN114243241A CN202111571048.4A CN202111571048A CN114243241A CN 114243241 A CN114243241 A CN 114243241A CN 202111571048 A CN202111571048 A CN 202111571048A CN 114243241 A CN114243241 A CN 114243241A
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- combiner
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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
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
- H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters
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Abstract
The invention provides a miniaturized metal plate combiner, wherein the front end and the rear end of each resonant chip are bent upwards to form bending structures for coupling adjacent resonant chips, the coupling is enhanced by adjusting the distance and the relative area between the bending structures of the adjacent resonant chips, and the adjustment of the coupling bandwidth is realized; meanwhile, a tuning channel penetrating through the end face of the cover plate is arranged in the area of the cover plate above the bending structures of any two adjacent resonant plates, and the distance and the relative area of the bending structures are changed in a mode of shifting the plates through the tuning channels on the cover plate, so that coupling is effectively enhanced, debugging parts are reduced, and cost is saved; in addition, the performance of the combiner is adjusted through the sheet metal resonance piece, the flying rod piece and the connecting rod which generate capacitive and inductive cross coupling, and the total weight is obviously reduced under the condition of realizing the same frequency index.
Description
Technical Field
The invention relates to the technical field of sheet metal combiners, in particular to a miniaturized sheet metal combiner.
Background
The combiner has the function of mainly meeting the requirements of operators on an antenna sharing and distribution system for multi-band, multi-standard mobile communication and wireless transmission and realizing the multi-band combining function of double frequency bands, triple frequency bands and the like. For the current development from 1G to 5G, the available frequency bands are gradually increased, and the combiner can make a set of indoor distribution system work in multiple frequency bands simultaneously. Not only is feeder saved in a radio communication system but also the trouble of switching different antennas is avoided. For mobile communication devices, high performance, miniaturization, and integration are important development directions.
The technical scheme of the existing combiner mainly comprises the following three types, wherein the first type is a metal cavity scheme: the metal cavity combiner is firm in structure, stable in performance, good in heat dissipation performance and mature in engineering application technology, but the low-frequency broadband combiner is mainly coupled by the coupling ribs, and meanwhile, the metal cavity combiner has the problems that the size is large, the weight is heavy and integration is difficult; the second is a ceramic dielectric scheme: the ceramic dielectric combiner has the advantages of small volume, easy integration with antenna equipment, low insertion loss, high Q value and light weight, but the ceramic dielectric has complex firing process, low yield and poor consistency of batch production; the polishing process has high refinement requirement, irreversible polishing process and high rejection rate; yet another difficulty is the brittleness of ceramic materials, with no precursor, sudden fracture under an applied load; the third is a sheet metal resonance sheet scheme: the sheet metal resonance piece combiner is small in size and light in weight, the sheet metal resonance piece is easy to process and assemble, the structure is simple and stable, and when the same electrical performance is realized, the size and the weight are greatly reduced, and the integration with an antenna is facilitated.
With the development of mobile communication networks, the development of small-sized combiner is promoted by the miniaturization requirements of multiband communication systems and the 5G era. The filter schemes all have advantages and disadvantages, and as is well known, in a radio frequency product, the lower the frequency is, the larger the product size is, so how to design a low-frequency sheet metal resonator plate meeting the requirements of miniaturization and light weight is a technical problem which needs to be solved urgently in the field.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a miniaturized sheet metal combiner to solve the technical problems mentioned in the background art.
In order to achieve the purpose, the invention adopts the technical scheme that: a miniaturized metal plate combiner comprises a cavity and a cover plate arranged on the cavity, wherein a plurality of tuning screws capable of being screwed into the cavity are arranged on the cover plate, a plurality of ports are formed in the outer side wall of the cavity, a plurality of filtering branches used for filtering network signals of different frequency bands are arranged in the cavity, and two ends of the filtering branches are coupled to the corresponding ports through tap pieces respectively;
each filtering branch consists of a plurality of resonant chips which are coupled in sequence, the front end and the rear end of each resonant chip are bent upwards to form bending structures for coupling adjacent resonant chips, coupling is enhanced by adjusting the distance and the relative area between the bending structures of the adjacent resonant chips, and the adjustment of the coupling bandwidth is realized.
Furthermore, a tuning channel penetrating through the end face of the cover plate is arranged in the area of the cover plate above the bending structures of any two adjacent resonance sheets.
Furthermore, the tuning channel is a plurality of shifting sheet tuning holes arranged at intervals, and the plurality of shifting sheet tuning holes are distributed in sequence along the length direction of the bending structure.
Furthermore, at least one tuning screw is arranged above each resonant chip, and the frequency of the resonant cavity is controlled by adjusting the extending amount of the tuning screw.
Furthermore, a partition wall for separating any two adjacent filtering branches is arranged between the two adjacent filtering branches.
Furthermore, each filtering branch can be selectively provided with a fly rod sheet for realizing capacitive cross coupling and a connecting rod for realizing inductive cross coupling.
Furthermore, one side of each resonance sheet is provided with a resonance post for overlapping the connecting rod/flying rod sheet, and one end of the resonance sheet close to the resonance post is provided with a connecting section connected to the resonance post.
Furthermore, two ends of the flying rod piece are respectively fixed above the connecting sections of the two corresponding resonance pieces through medium rivets, and the flying rod piece is not in contact with the resonance pieces; and two ends of the connecting rod are respectively welded above the connecting sections of the two corresponding resonance sheets.
Further, the connecting section for welding the connecting rod is provided with a welding part for supporting the connecting rod.
Furthermore, the resonance sheet, the bending structure, the connecting section and the welding part are of a metal plate integrally-formed structure.
Compared with the prior art, the invention has the beneficial effects that:
1. the front end and the rear end of each resonant chip are bent upwards to form bending structures for coupling of the adjacent resonant chips, coupling is enhanced by adjusting the distance and the relative area between the bending structures of the adjacent resonant chips, and the coupling bandwidth is adjusted;
2. a tuning channel penetrating through the end face of the cover plate is arranged in the area of the cover plate above the bending structures of any two adjacent resonance plates, and the distance and the relative area of the bending structures are changed in a mode of shifting the plates through the tuning channels on the cover plate, so that coupling is effectively enhanced, debugging parts are reduced, and cost is saved;
3. the performance of the combiner is adjusted through the sheet metal resonance piece, the flying rod piece and the connecting rod which generate capacitive and inductive cross coupling, and the total weight is obviously reduced under the condition of realizing the same frequency index;
4. the design scheme of the sheet metal material and the structure has strong market competitiveness in the low-frequency combiner, is not limited to the low-frequency combiner, can also be suitable for the design scheme of radio frequency devices with miniaturization requirements, and has strong practicability.
Drawings
Fig. 1 is a schematic structural diagram of a miniaturized sheet metal combiner provided in an embodiment of the present invention;
fig. 2 is an exploded view of a miniaturized sheet metal combiner according to an embodiment of the present invention;
fig. 3 is a simulation schematic diagram of a miniaturized sheet metal combiner provided in an embodiment of the present invention;
FIG. 4 is a schematic diagram showing a comparison between a sheet metal single-cavity structure and a conventional single-cavity technology according to the technical scheme of the present invention;
FIG. 5 is a schematic diagram showing a comparison between a sheet metal dual-cavity structure according to the present invention and a conventional dual-cavity technology;
FIG. 6 is a schematic structural diagram of a conventional metal coaxial scheme covering three low-frequency bands of 713-798-811-862-880-960 MHz;
the labels in the figure are: 1. the cavity, 2, plectrum tuning hole, 3, apron, 4, screw rod tuning hole, 5, tuning screw, 6, resonance piece, 7, first tap piece, 8, first connecting rod, 9, first flying rod piece, 10, second connecting rod, 11, second flying rod piece, 12, medium rivet, 13, second tap piece, 14, resonance post.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.
In a radio frequency product, the lower the frequency is, the larger the product size is, and the low-frequency sheet metal resonance piece provided by the invention meets the requirements of miniaturization and light weight. Compared with the prior art, the low-frequency metal plate combiner has the advantages of more prominent advantages and stronger market competitiveness under the limited volume condition.
The principle of the invention is as follows: aiming at the existing design scheme of the low-frequency combiner, the invention is innovatively designed on the basis of the general design scheme, can obviously reduce the volume, reduce the weight and innovate a debugging mode, and is more suitable for engineering application. The cavity and the resonance sheet made of the sheet metal material are manufactured by a die-casting or machining method. The design of the bending structure enables the single cavity to be smaller in size, the adjustment mode of coupling is different from common debugging screws, debugging metal resonators and newly-emerging polished dielectric ceramic resonators, and the technical scheme of the invention adjusts the bending structure to adjust the coupling in a shifting sheet mode, is suitable for miniaturized low-frequency combiners, and can adapt to the development trend of multi-band of a 5G era communication system and high integration level of communication equipment.
The following description of the technical scheme of the invention takes a three-frequency sheet metal combiner covering three low-frequency bands of 713, 798, 811, 862, 880, 960 MHz as an example:
fig. 1 is a schematic structural diagram of a miniaturized sheet metal combiner provided in this embodiment, fig. 2 is an exploded schematic diagram thereof, and fig. 3 is a simulation schematic diagram thereof; in the figure, port 1 corresponds to a common port, port 2 corresponds to segments 713-.
The miniaturized metal plate combiner mainly comprises a cavity 1, a tuning screw rod 5, a cover plate 3, a resonance plate 6, a tapping plate and a medium rivet 12, wherein the cover plate 3 used for sealing an opening of the cavity is arranged above the cavity 1, the tuning screw rod 5 capable of being screwed into the cavity is arranged on the cover plate 3, a plurality of filtering branches used for filtering network signals of different frequency bands are arranged in the cavity 1, and two ends of the plurality of filtering branches are coupled to corresponding ports through the tapping plate respectively.
Each filtering branch is composed of a plurality of resonant chips 6 which are coupled in sequence, the front end and the rear end of each resonant chip 6 are bent upwards to form bending structures for coupling adjacent resonant chips, coupling is enhanced by adjusting the distance and the relative area between the bending structures of the adjacent resonant chips, and the adjustment of the coupling bandwidth is realized.
In the embodiment, at least one tuning screw 5 is arranged above each resonant chip 6, and the frequency of the resonant cavity is controlled by adjusting the extending amount of the tuning screw 5; at least two plectrum tuning holes 2 are arranged above the bending structure of every two adjacent resonance plates, and the distance of the bending structure is adjusted in a mode of plectrum at the plectrum tuning holes 2, so that the control of the coupling amount is realized. The left zero point generated by the cross coupling is controlled by the first flying bar piece 9 and the second flying bar piece 11, and the right zero point generated by the cross coupling is adjusted by the first connecting rod 8 and the second connecting rod 10.
Further, the cavity 1 is made of aluminum, and the inner surface of the cavity is electroplated with silver. The cavity 1 is manufactured by die casting or machining, and the cavity 1 is further provided with a resonance post 14 and a medium rivet 12 for fixing the resonance sheet 6.
The first tap piece 7 and the second tap piece 13 are fixed through a medium rivet 12, then the metal plate resonance pieces 6 are installed, and then the first tap piece 7, the second tap piece 13 and the specific positions of the resonance pieces 6 are fixed through welding.
The resonance sheet 6 is of a sheet metal sheet structure, one side of each resonance sheet is provided with a resonance post 14 for overlapping the connecting rod/flying rod sheet, one end of the resonance sheet 6 close to the resonance post is provided with a connecting section connected to the resonance post, the connecting section is fixed with the resonance post 14 through a screw, and the resonance sheet 6 is fixed with the cavity 1 through a medium rivet 12.
In this embodiment, the thickness of the resonator plate 6 is very thin, and the front end of the resonator plate 6 is bent upward by 90 °, where it should be noted that: the design of bending structure should guarantee that the later stage can carry out the plectrum operation to bending structure through plectrum tuning hole 2 on the apron, and in addition, plectrum tuning hole 2 is provided with a plurality of and a plurality of plectrum tuning hole and distributes along bending structure's length direction in proper order, and of course, plectrum tuning hole 2 also does not confine to the structure of a plurality of poroids, also can set up to the trough-shaped structure of a style of calligraphy. The innovative coupling debugging mode reduces the coupling ribs and the coupling screw rods of the coaxial resonant rod design scheme, the weight can be reduced by more than half, the product weight and the assembly parts are effectively reduced, and the production efficiency is improved.
Furthermore, the first flying bar piece 9 and the second flying bar piece 11 which generate capacitive cross coupling are fixed above the resonance piece 6 through the dielectric rivet 12, and it is required to ensure that the flying bar pieces are not in contact with the resonance piece 6. The first connecting rod 8 and the second connecting rod 10, which generate inductive cross coupling, are fixed above the resonant chip 6 by welding, in order to avoid the connecting rods contacting with the resonant chip in the middle, the embodiment further provides a welding part for supporting the connecting rods on the connecting section for welding the connecting rods, and the resonant chip 6, the bending structure, the connecting section and the welding part are integrally formed by metal plates.
In this embodiment, the cover plate 3 is made of an aluminum material, the lower surface of the cover plate needs to be plated with silver, and the cover plate is designed in a welding mode to meet the size requirement of a miniaturized radio frequency device and facilitate the integration of an antenna filter. The tuning screw 5 is made of brass material with silver plated surface and is screwed into the cavity 1 through the cover plate. And after the assembly of the parts is finished, coating solder paste on the upper surface of the cavity 1, and sealing the cover plate 3 and the cavity 1 through high-temperature reflow soldering.
Fig. 4 is a schematic diagram showing a comparison between a sheet metal single-cavity structure according to the present invention and a conventional single-cavity technology, in which the sheet metal single-cavity structure according to the present invention is reduced by about 33% in volume relative to a metal coaxial single cavity, and a sheet metal resonator plate can be reduced in size and weight compared to a common metal coaxial scheme; in addition, compared with the existing ceramic dielectric filter with higher heat, the ceramic dielectric filter has better mechanical impact resistance and temperature shock resistance, and the material is conventional.
Fig. 5 is a schematic diagram comparing a sheet metal dual-cavity structure adopting the technical scheme of the present invention with the conventional dual-cavity technology, and fig. 6 is a schematic diagram of a conventional metal coaxial scheme covering three low-frequency bands of 713-798 & 811-862-880-960 MHz, and it is calculated that the height of the three-frequency sheet metal combiner of the present invention and the conventional metal coaxial scheme shown in fig. 6 is reduced by 20.5 mm under the condition that the bottom areas of the two are similar, the total volume is reduced by about 55%, and the weight is reduced to about 0.4 kg from 1.1 kg of the coaxial metal scheme.
In summary, the low-frequency combiner design applied to 713-798-811-862-880-960 MHz (51-85 MHz bandwidth) provided by the embodiment of the present invention has the following advantages:
1) under the condition of limited volume, compared with the common coaxial metal scheme, the bending structure formed by bending the front end and the rear end of the resonance sheet upwards reduces the height by more than half and reduces the volume by 55 percent, thereby being an important advantage of the miniaturized metal plate low-frequency combiner;
2) the debugging mode of the bending structure distance and the relative area is changed through the shifting sheet, so that the coupling is effectively enhanced, debugging parts are reduced, and the cost is saved;
3) the sheet metal resonance sheet with a sheet structure, the flying rod sheet and the connecting rod which generate capacitive and inductive cross coupling reduce the total weight by about 64 percent under the condition of realizing the same frequency index;
4) the design scheme of the sheet metal material and the structure has strong market competitiveness in the low-frequency combiner, is not limited to the low-frequency combiner, and can be suitable for the design scheme of radio frequency devices with miniaturization requirements.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a miniaturized panel beating combiner, includes the cavity and installs the apron on the cavity, installs a plurality of tuning screw rods that can rotate into in the cavity on the apron, be provided with a plurality of ports on the lateral wall of cavity, its characterized in that: a plurality of filtering branches for filtering network signals of different frequency bands are arranged in the cavity, and two ends of the filtering branches are coupled to corresponding ports through tap pieces respectively;
each filtering branch consists of a plurality of resonant chips which are coupled in sequence, the front end and the rear end of each resonant chip are bent upwards to form bending structures for coupling adjacent resonant chips, coupling is enhanced by adjusting the distance and the relative area between the bending structures of the adjacent resonant chips, and the adjustment of the coupling bandwidth is realized.
2. The miniaturized sheet metal combiner of claim 1, wherein: and the area of the cover plate above the bending structures of any two adjacent resonance plates is provided with a tuning channel which penetrates through the end face of the cover plate.
3. The miniaturized sheet metal combiner of claim 2, wherein: the tuning channel is a plurality of shifting sheet tuning holes which are arranged at intervals, and the plurality of shifting sheet tuning holes are distributed in sequence along the length direction of the bending structure.
4. The miniaturized sheet-metal combiner of claim 1 or 3, wherein: at least one tuning screw is arranged above each resonant chip, and the frequency of the resonant cavity is controlled by adjusting the extending amount of the tuning screw.
5. The miniaturized sheet-metal combiner of claim 4, wherein: a partition wall for separating the two adjacent filtering branches is arranged between any two adjacent filtering branches.
6. The miniaturized sheet-metal combiner of any one of claims 1-5, wherein: each filtering branch can be selectively provided with a fly rod piece for realizing capacitive cross coupling and a connecting rod for realizing inductive cross coupling.
7. The miniaturized sheet metal combiner of claim 6, wherein: one side of each resonance sheet is provided with a resonance post for overlapping the connecting rod/flying rod sheet, and one end of the resonance sheet close to the resonance post is provided with a connecting section connected to the resonance post.
8. The miniaturized sheet metal combiner of claim 7, wherein: two ends of the flying rod piece are respectively fixed above the connecting sections of the two corresponding resonance pieces through medium rivets, and the flying rod piece is not in contact with the resonance pieces; and two ends of the connecting rod are respectively welded above the connecting sections of the two corresponding resonance sheets.
9. The miniaturized sheet metal combiner of claim 8, wherein: the connecting section for welding the connecting rod is provided with a welding part for supporting the connecting rod.
10. The miniaturized sheet metal combiner of claim 9, wherein: the resonance piece, the bending structure, the connecting section and the welding part are of a metal plate integrally formed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111571048.4A CN114243241A (en) | 2021-12-21 | 2021-12-21 | Miniaturized panel beating combiner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111571048.4A CN114243241A (en) | 2021-12-21 | 2021-12-21 | Miniaturized panel beating combiner |
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| Publication Number | Publication Date |
|---|---|
| CN114243241A true CN114243241A (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111571048.4A Pending CN114243241A (en) | 2021-12-21 | 2021-12-21 | Miniaturized panel beating combiner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295983A (en) * | 2022-07-26 | 2022-11-04 | 武汉凡谷电子技术股份有限公司 | Filter |
-
2021
- 2021-12-21 CN CN202111571048.4A patent/CN114243241A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295983A (en) * | 2022-07-26 | 2022-11-04 | 武汉凡谷电子技术股份有限公司 | Filter |
| CN115295983B (en) * | 2022-07-26 | 2024-01-02 | 武汉凡谷电子技术股份有限公司 | Filter |
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