CN114361748A - 5G metal plate duplexer and assembly method thereof - Google Patents

Abstract

A5G sheet metal duplexer and an assembly method thereof comprise a cover plate and a resonant cavity which are matched with each other; the resonant cavity is composed of a left cavity and a right cavity, a first resonant part is arranged in the right cavity, a second resonant part, a third resonant part and a fourth resonant part which are oppositely arranged are respectively arranged in the left cavity, and a duplexer tap part, a first capacitive cross coupling, a second capacitive cross coupling, a third capacitive cross coupling, a fourth capacitive cross coupling and an inductive cross coupling are also arranged in the resonant cavity; the volume and the space utilization rate of the inner cavity are improved, the arrangement difficulty of the resonance plates is simplified, and the 5G two working frequency ranges of 3400-; the cost can be reduced and the efficiency can be improved from the aspects of reducing the weight of materials and simplifying the assembly. The cavity is made in a die casting mode or a machining mode, the width of the radial strip is made to be narrow, weight reduction is conducted, the resonator is made of sheet metal materials and made into a resonator plate, the height of the resonator plate is reduced by more than 1/2 of a conventional filter, and the goal of miniaturization is achieved.

Description

5G metal plate duplexer and assembly method thereof

Technical Field

The invention belongs to the technical field of communication, and particularly relates to a 5G sheet metal duplexer and an assembly method thereof.

Background

Currently, a duplexer is a relatively special two-way three-terminal filter. The duplexer couples a weak received signal and feeds a large transmission power to the antenna, and requires that the two perform their functions independently without affecting each other.

Therefore, the quality of the performance of the duplexer directly affects the quality of the whole communication system, and is a vital device in modern microwave and millimeter wave communication systems.

The cavity filter is an important filter, and compared with filters with other properties, the cavity filter has the advantages of firm structure, stable and reliable performance, small volume, moderate Q value, far high-end parasitic passband and good heat dissipation performance, and can be used for higher power and frequency.

In the existing cavity filter, a coupling structure generally adopts a rod-shaped resonance rod, a corresponding coupling adjusting device is arranged on the side surface of the resonance rod, and the coupling adjusting device generally adopts a metal flying rod, or flying rod discs are additionally arranged at the front end and the rear end of the metal flying rod, so that the coupling with the resonance rod is realized. However, this coupling adjustment device is only suitable for coupling with a rod-shaped resonance rod. Along with the miniaturization of components such as a duplexer, a combiner, a filter and the like by front-end equipment in the modern communication field, when resonance rods adopted by the components such as the miniaturized duplexer, the combiner, the filter and the like are not rod-shaped resonance rods any more, the requirements of products with miniaturization and high requirements on coupling strength are higher, the coupling and strength adjustable range of the traditional coupling adjusting device is small, the device is not applicable any more, and the weight is heavy.

In the existing ceramic dielectric filter, the existing ceramic dielectric scheme has the advantages of small volume, easy assembly, good electrical performance index insertion loss performance and high echo consistency. But the difficulty of selecting materials is large; the ceramic medium firing process is complex, and the yield is low; poor consistency among batches, such as phase, amplitude, etc.; the far-end rejection performance is poor, harmonic waves almost appear near a passband, engineering application is not facilitated, but the far-end rejection performance is heavy, and high power is easy to crack.

Disclosure of Invention

In view of the above, in order to solve the defects of the prior art, the present invention provides a 5G sheet metal duplexer and an assembly method thereof, so as to further increase the volume of the inner cavity, increase the space utilization rate, and simplify the arrangement difficulty of the resonator plate, and the manufacturing of the duplexer is completed by sheet metal arrangement of the two working frequency bands 3400-3600MHz and 2496-2690MHz of the 5G. By adopting the scheme, the cost is reduced and the efficiency is improved from the aspects of reducing the weight of materials and simplifying the assembly.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

A5G metal plate duplexer comprises a cover plate and a resonant cavity which are matched with each other; the resonant cavity consists of a left cavity and a right cavity, wherein a first resonant part is arranged in the right cavity, a second resonant part, a third resonant part and a fourth resonant part which are oppositely arranged are respectively arranged in the left cavity, and a duplexer tap part, a first capacitive cross coupling, a second capacitive cross coupling, a third capacitive cross coupling, a fourth capacitive cross coupling and an inductive cross coupling are also arranged in the resonant cavity;

the first resonance part comprises a first resonance sheet, a second resonance sheet, a third resonance sheet, a fourth resonance sheet, a fifth resonance sheet and a sixth resonance sheet which are sequentially arranged from top to bottom to form an integrated structure; the second resonance part comprises a seventh resonance plate, an eighth resonance plate and a ninth resonance plate which are sequentially arranged into an integrated structure from bottom to top; the third resonance part comprises a tenth resonance plate, an eleventh resonance plate, a twelfth resonance plate and a thirteenth resonance plate which are sequentially arranged into an integrated structure from bottom to top; the fourth resonance part comprises a fourteenth resonance plate, a fifteenth resonance plate, a sixteenth resonance plate and a seventeenth resonance plate which are sequentially arranged from top to bottom to form an integrated structure; the duplexer tap part comprises a common tap, a first tap and a second tap, and the common tap, the first tap and the second tap are all positioned in the resonant cavity and led out of the back of the resonant cavity.

Furthermore, a filter adjusting screw matched with the antenna plate for fine adjustment is arranged on the cover plate, and positioning bosses for positioning the left, right, upper and lower positions of the resonant chip are arranged in the resonant cavity.

Furthermore, the first resonance part and the second resonance part are both 2.6G sheet metal resonance sheets.

Furthermore, the third resonance part and the fourth resonance part are both 3.5G sheet metal resonance plates.

Further, the first capacitive cross coupling and the second capacitive cross coupling are both 3.5G capacitive cross coupling.

Further, the third capacitive cross coupling, the fourth capacitive cross coupling and the inductive cross coupling are all cross couplings of 2.6G.

Further, the first tap is a 3.5G tap, and the second tap is a 2.6G tap.

Furthermore, the common tap and the second tap are both positioned in the left cavity, and the first tap is positioned in the right cavity.

Furthermore, a first screw and a second screw are further arranged in the resonant cavity, the first screw is a plastic screw, and the second screw is a silver-plated metal screw.

An assembling method of a 5G sheet metal duplexer comprises the following steps:

s1: firstly, respectively arranging a common tap, a first tap and a second tap in a resonant cavity;

s2: after the installation of the tap part of the duplexer is finished, respectively arranging a third capacitive cross coupling and a fourth capacitive cross coupling of 2.6G, and a first capacitive cross coupling and a second capacitive cross coupling of 3.5G in a resonant cavity by using first screws without contacting the resonant cavity;

s3: mounting the connecting wire of inductive cross coupling on the first resonance sheet and the third resonance sheet; the inductive cross coupling is connected with the integrated resonance sheet of the first resonance part by welding;

s4: respectively assembling a first resonance part, a second resonance part, a third resonance part and a fourth resonance part into the resonant cavity, fixing two ends of each resonance piece in the resonant cavity through second screws, and then welding the contact parts of the resonance pieces and the side wall of the cavity with the coating solder paste to fully ground the resonance pieces; the arrangement difficulty of the resonator is simplified, and the two working frequency bands of 5G are as follows: 3400 + 3600Mhz and 2496 + 2690MHz, and completing the manufacture of the duplexer by sheet-shaped arrangement of the sheet-metal resonance sheets;

s5: coating solder paste on the periphery of the resonant cavity, installing a cover plate, and performing welding through reflow soldering, wherein the assembly is finished; the cover plate is provided with a filter adjusting screw matched with the antenna plate for fine adjustment, and the back of the resonant cavity is provided with a duplexer tap part extending out of the resonant cavity.

The invention has the beneficial effects that:

the invention provides a 5G metal plate duplexer and an assembly method thereof, which further improve the volume of an inner cavity, improve the space utilization rate and simplify the arrangement difficulty of a resonance plate, and the manufacturing of the duplexer is completed by sheet metal arrangement of 3400-; the weight of the material can be reduced, the cost can be reduced and the efficiency can be improved in the aspect of simplifying the assembly;

the cavity is die-cast or machined, the width of the radial strip is narrow, weight reduction is carried out, the resonator is made of sheet metal materials, the height of the resonator is reduced by more than 1/2 of a conventional filter, the miniaturization target is achieved, but electrical performance indexes are not lost, the size requirement is determined through simulation, the debugging difficulty can be further reduced, the assembly time of the filter is reduced through a welding process, and the efficiency is improved. Compared with the existing cavity filter and ceramic dielectric filter, the gold-pulling resonant chip has light weight, which is only 60% of the weight of the ceramic scheme, and low cost, which is about 70% of the ceramic scheme. And is easy to process; the concrete points are as follows:

firstly, two important working frequency ranges of 5G, 3400-;

secondly, the frequency band of the 5G metal plate duplexer is not limited to the 3400-3600Mhz frequency band, and the 3400-3800Mhz arbitrary 100MHz or 200MHz bandwidth and 2496-2690MHz bandwidth are combined into the 5G metal plate duplexer;

thirdly, the resonant chip is fixed by screws and then coated with solder paste for welding, so that the utilization of tools is reduced, and the assembly is simple;

fourthly, the harmonic oscillator is arranged in a sheet shape to meet the size requirement of a miniaturized radio frequency device;

fifthly, the cavity of the resonant cavity adopts a die casting mode or a machining mode, the width of the rib is made to be narrow, and weight reduction processing is carried out to meet the size requirement of a miniaturized 5G radio frequency device;

and sixthly, the resonance sheet is an integrated resonance sheet, so that materials are reduced, and the processing is simple.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 2;

FIG. 6 is a schematic rear view of a resonant cavity;

FIG. 7 is a schematic structural view of a cover plate;

fig. 8 is a waveform diagram of a 5G sheet metal duplexer;

the labels in the figure are: a1-a first resonator plate, A2-a second resonator plate, A3-a third resonator plate, A4-a fourth resonator plate, A5-a fifth resonator plate, A6-a sixth resonator plate, A7-a seventh resonator plate, A8-an eighth resonator plate, A9-a ninth resonator plate, B1-a tenth resonator plate, B2-an eleventh resonator plate, B3-a twelfth resonator plate, B4-a thirteenth resonator plate, B5-a fourteenth resonator plate, B6-a fifteenth resonator plate, B7-a sixteenth resonator plate, B8-a seventeenth resonator plate, S1-a common tap, S2-a first tap, S3-a second tap, B24-a first capacitive cross coupling, B57-a second cross coupling, A46-a third capacitive cross coupling, A79-a fourth capacitive cross coupling, A13-an inductive cross coupling, l1-first screw, L2-second screw.

Detailed Description

The following specific examples are given to further clarify, complete and detailed the technical solution of the present invention. The present embodiment is a preferred embodiment based on the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.

A5G metal plate duplexer comprises a cover plate and a resonant cavity which are matched with each other; the resonant cavity consists of a left cavity and a right cavity, a first resonant part is arranged in the right cavity, a second resonant part, a third resonant part and a fourth resonant part which are oppositely arranged are respectively arranged in the left cavity, the volume of the inner cavity is increased, the space utilization rate is improved, the arrangement difficulty of the resonant plates is simplified, and the 5G two working frequency ranges of 3400-3600Mhz and 2496-2690MHz are distributed in a sheet metal manner to complete the manufacture of the duplexer; a duplexer tap part, a first capacitive cross coupling B24, a second capacitive cross coupling B57, a third capacitive cross coupling A46, a fourth capacitive cross coupling A79 and an inductive cross coupling A13 are further arranged in the resonant cavity; the cross coupling is used for meeting the requirements of assembly in place and realizing the positioning in the assembly process; in order to solve the problem of the installation position of the resonant chip, the resonant chips of the left cavity and the right cavity are shared, the resonant chips are an integral sheet metal part, screw holes are arranged at two ends of each resonant chip, and the corresponding upper positioning bosses of the cavities are fixed by screws, so that the left position, the right position, the upper position and the lower position of each resonant chip can be accurately positioned without specific tool positioning; then, coating solder paste between the resonance plate and the cavity wall, and performing reflow soldering;

the first resonance part comprises a first resonance plate A1, a second resonance plate A2, a third resonance plate A3, a fourth resonance plate A4, a fifth resonance plate A5 and a sixth resonance plate A6 which are sequentially arranged into an integrated structure from top to bottom; the second resonance part comprises a seventh resonance plate A7, an eighth resonance plate A8 and a ninth resonance plate A9 which are sequentially arranged into an integrated structure from bottom to top; the third resonance part comprises a tenth resonance plate B1, an eleventh resonance plate B2, a twelfth resonance plate B3 and a thirteenth resonance plate B4 which are sequentially arranged into an integrated structure from bottom to top; the fourth resonance part comprises a fourteenth resonance plate B5, a fifteenth resonance plate B6, a sixteenth resonance plate B7 and a seventeenth resonance plate B8 which are sequentially arranged from top to bottom to form an integrated structure; the duplexer tap portion comprises a common tap S1, a first tap S2 and a second tap S3, wherein the common tap S1, the first tap S2 and the second tap S3 are all located in the resonant cavity and are led out of the back surface of the resonant cavity.

Furthermore, a filter adjusting screw matched with the antenna plate for fine adjustment is arranged on the cover plate, so that the filter adjusting screw is convenient to debug, and the filter adjusting screw is arranged on the antenna plate for fine adjustment to enable the performance of the filter adjusting screw to be best; positioning bosses for positioning the left, right, upper and lower positions of the resonant chip are arranged in the resonant cavity. The invention integrates two different frequency ranges of 3400-3600Mhz and 2496-2690Mhz of 5G, which is beneficial to the sharing of the antenna at the later stage so as to save the cost. In the 5G communication era, RRU is integrally designed, and two important 5G working frequency bands are integrated together, so that the market competitiveness of the product can be greatly improved.

Furthermore, the first resonance part and the second resonance part are both 2.6G sheet metal resonance sheets.

Furthermore, the third resonance part and the fourth resonance part are both 3.5G sheet metal resonance plates.

Further, the first capacitive cross coupling B24 and the second capacitive cross coupling B57 are both capacitive cross couplings of 3.5G.

Further, the third capacitive cross-coupling a46, the fourth capacitive cross-coupling a79 and the inductive cross-coupling a13 are all cross-couplings of 2.6G.

Further, the first tap S2 is a 3.5G tap, and the second tap S3 is a 2.6G tap.

Further, the common tap S1 and the second tap S3 are both located in the left cavity, and the first tap S2 is located in the right cavity.

Furthermore, a first screw L1 and a second screw L2 are arranged in the resonant cavity, the first screw L1 is a plastic screw, and the second screw L2 is a silver-plated metal screw.

An assembling method of a 5G sheet metal duplexer comprises the following steps:

s1: firstly, respectively arranging a common tap S1, a first tap S2 and a second tap S3 in a resonant cavity;

s2: after the tap part of the duplexer is installed, respectively arranging a third capacitive cross coupling A46 and a fourth capacitive cross coupling A79 of 2.6G, and a first capacitive cross coupling B24 and a second capacitive cross coupling B57 of 3.5G in a resonant cavity by using first screws L1, wherein the first screws L1 are not in contact with the resonant cavity;

s3: connecting wires of the inductive cross coupling A13 are arranged on the first resonator plate A1 and the third resonator plate A3; the inductive cross coupling A13 is connected with the integrated resonance sheet of the first resonance part by welding;

s4: respectively assembling the first resonance part, the second resonance part, the third resonance part and the fourth resonance part into a resonance cavity, fixing two ends of each resonance sheet in the resonance cavity through second screws L2, and then welding the contact parts of the resonance sheets and the side wall of the cavity with the coating solder paste to fully ground the resonance sheets; the arrangement difficulty of the resonator is simplified, and the two working frequency bands of 5G are as follows: 3400 + 3600Mhz and 2496 + 2690MHz, and completing the manufacture of the duplexer by sheet-shaped arrangement of the sheet-metal resonance sheets; the frequency and the Q value of the filter can be influenced by the reference displacement of the resonator plate relative to the cavity no matter the reference displacement is up, down, left and right; due to the suspended structure, the two ends of the resonant chip are fixed by screws in the structural design, and then solder paste is coated for welding, so that the assembly is easier;

s5: coating solder paste on the periphery of the resonant cavity, installing a cover plate, and performing welding through reflow soldering, wherein the assembly is finished; the cover plate is provided with a filter adjusting screw matched with the antenna plate for fine adjustment, and the back of the resonant cavity is provided with a duplexer tap part extending out of the resonant cavity.

In summary, the 5G sheet metal duplexer and the assembly method thereof provided by the invention further improve the volume of the inner cavity, improve the space utilization rate, simplify the arrangement difficulty of the resonator plate, and complete the manufacture of the duplexer by sheet metal arrangement of the 5G two working frequency ranges 3400-; the weight of the material can be reduced, the cost can be reduced and the efficiency can be improved in the aspect of simplifying the assembly; the cavity is die-cast or machined, the width of the radial strip is narrow, weight reduction is carried out, the resonator is made of sheet metal materials, the height of the resonator is reduced by more than 1/2 of a conventional filter, the miniaturization target is achieved, but electrical performance indexes are not lost, the size requirement is determined through simulation, the debugging difficulty can be further reduced, the assembly time of the filter is reduced through a welding process, and the efficiency is improved. Compared with the existing cavity filter and ceramic dielectric filter, the gold-pulling resonant chip has light weight, which is only 60% of the weight of the ceramic scheme, and low cost, which is about 70% of the ceramic scheme. And is easy to process.

The principal features, principles and advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to explain the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as expressed in the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a 5G panel beating duplexer which characterized in that: comprises a cover plate and a resonant cavity which are matched with each other; the resonant cavity consists of a left cavity and a right cavity, wherein a first resonant part is arranged in the right cavity, a second resonant part, a third resonant part and a fourth resonant part which are oppositely arranged are respectively arranged in the left cavity, and a duplexer tap part, a first capacitive cross coupling (B24), a second capacitive cross coupling (B57), a third capacitive cross coupling (A46), a fourth capacitive cross coupling (A79) and an inductive cross coupling (A13) are also arranged in the resonant cavity;

the first resonance part comprises a first resonance sheet (A1), a second resonance sheet (A2), a third resonance sheet (A3), a fourth resonance sheet (A4), a fifth resonance sheet (A5) and a sixth resonance sheet (A6) which are sequentially arranged into an integrated structure from top to bottom; the second resonance part comprises a seventh resonance plate (A7), an eighth resonance plate (A8) and a ninth resonance plate (A9) which are sequentially arranged into an integrated structure from bottom to top; the third resonance part comprises a tenth resonance plate (B1), an eleventh resonance plate (B2), a twelfth resonance plate (B3) and a thirteenth resonance plate (B4) which are sequentially arranged into an integrated structure from bottom to top; the fourth resonance part comprises a fourteenth resonance plate (B5), a fifteenth resonance plate (B6), a sixteenth resonance plate (B7) and a seventeenth resonance plate (B8) which are sequentially arranged from top to bottom to form an integrated structure; the duplexer tap part comprises a common tap (S1), a first tap (S2) and a second tap (S3), and the common tap (S1), the first tap (S2) and the second tap (S3) are all located in the resonant cavity and led out of the back of the resonant cavity.

2. The 5G sheet metal duplexer according to claim 1, characterized in that: the cover plate is provided with a filter adjusting screw matched with the antenna plate for fine adjustment, and the resonant cavity is internally provided with a positioning boss for positioning the left, right, upper and lower positions of the resonant chip.

3. The 5G sheet metal duplexer according to claim 1, characterized in that: the first resonance part and the second resonance part are both 2.6G metal plate resonance sheets.

4. The 5G sheet metal duplexer according to claim 1, characterized in that: and the third resonance part and the fourth resonance part are both 3.5G metal plate resonance sheets.

5. The 5G sheet metal duplexer according to claim 1, characterized in that: the first capacitive cross coupling (B24) and the second capacitive cross coupling (B57) are both 3.5G capacitive cross couplings.

6. The 5G sheet metal duplexer according to claim 1, characterized in that: the third capacitive cross coupling (A46), the fourth capacitive cross coupling (A79) and the inductive cross coupling (A13) are all cross couplings of 2.6G.

7. The 5G sheet metal duplexer according to claim 1, characterized in that: the first tap (S2) is a 3.5G tap and the second tap (S3) is a 2.6G tap.

8. The 5G sheet metal duplexer according to claim 1, characterized in that: the common tap (S1) and the second tap (S3) are both located in the left cavity, and the first tap (S2) is located in the right cavity.

9. The 5G sheet metal duplexer according to claim 1, characterized in that: a first screw (L1) and a second screw (L2) are further arranged in the resonant cavity, the first screw (L1) is a plastic screw, and the second screw (L2) is a silver-plated metal screw.

10. The assembling method of the 5G sheet metal duplexer according to claim 1, wherein the assembling method comprises the following steps: the method comprises the following steps:

s1: firstly, respectively arranging a common tap (S1), a first tap (S2) and a second tap (S3) in a resonant cavity;

s2: after the tap part of the duplexer is installed, respectively arranging a third capacitive cross coupling (A46) and a fourth capacitive cross coupling (A79) of 2.6G, and a first capacitive cross coupling (B24) and a second capacitive cross coupling (B57) of 3.5G in a resonant cavity by using first screws (L1) and not contacting with the resonant cavity;

s3: mounting connecting wires of inductive cross coupling (A13) on the first resonant chip (A1) and the third resonant chip (A3); the inductive cross coupling (A13) is connected with the integrated resonance sheet of the first resonance part by welding;

s4: respectively assembling the first resonance part, the second resonance part, the third resonance part and the fourth resonance part into a resonance cavity, fixing two ends of each resonance sheet in the resonance cavity through second screws (L2), and then welding the contact parts of the resonance sheets and the side wall of the cavity with the coating solder paste to fully ground the resonance sheets; the arrangement difficulty of the resonator is simplified, and the two working frequency bands of 5G are as follows: 3400 + 3600Mhz and 2496 + 2690MHz, and completing the manufacture of the duplexer by sheet-shaped arrangement of the sheet-metal resonance sheets;

s5: coating solder paste on the periphery of the resonant cavity, installing a cover plate, and performing welding through reflow soldering, wherein the assembly is finished; the cover plate is provided with a filter adjusting screw matched with the antenna plate for fine adjustment, and the back of the resonant cavity is provided with a duplexer tap part extending out of the resonant cavity.

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