Adjustable metal plate filter

Abstract

The utility model discloses an adjustable sheet metal filter which comprises a die-casting cavity, a debugging screw and a reed are arranged at the top of the die-casting cavity, connectors are symmetrically arranged on one side of the die-casting cavity, and a sealing cover plate is installed at the bottom of the die-casting cavity in a threaded mode. The sealing cover plate is provided with a resonance assembly composed of a resonance rod and an M-shaped protrusion. The two ends of the resonance rod are connected with the connector and define a resonance cavity. An even number of M-shaped bulges are symmetrically distributed on the resonance rod; a first pole coupling metal sheet and an insulating medium covering the first pole coupling metal sheet are arranged in the resonant cavity; two sides of the resonant cavity are provided with a second pole coupling metal sheet and a third pole coupling metal sheet which are connected with the resonant assembly, and the first pole coupling metal sheet and the insulating medium are located in an area enclosed by the third pole coupling metal sheet and the resonant rod. Through the application of the resonance assembly, the light weight and integration requirements of a 5G large-scale antenna MIMO on a radio frequency device are met, so that the whole product is small in size and wide in continuous bandwidth, and the 5G requirements of high density and low unit price are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of 5G filters and relates to an adjustable sheet metal filter. Background Art

[0002] With the advent of the 5G innovation cycle, communication technology has developed and innovated rapidly. In 5G communication systems, the requirements for filters have also changed significantly. Since 5G networks need to support higher data transmission rates, lower latency, and more connections, more stringent requirements are placed on the performance, size, and weight of RF filters.

[0003] In the 4G communication era, the filter devices used in 4G communication base stations are heavy, bulky, and expensive, making them difficult to be widely used in highly integrated antennas and unable to better meet the high-density network requirements of the 5G market. For example, traditional coaxial cavity filters are heavy, bulky, and have high production and transportation costs. They are not convenient for high-altitude and long-distance operations, and are not convenient for meeting the requirements of 5G high-density network deployment. Problems with existing technologies 1: Large size, heavy weight, and expensive material costs. 2: Not conducive to operation during production 3: Not convenient for field and high-altitude installation.

[0004] In summary, the existing 4G filters are difficult to meet the 5G market's demand for high-density network deployment due to their large size, heavy weight, expensive material costs, inconvenient operation during production, and inconvenient field and high-altitude installation. Therefore, the development of miniaturized, integrated, lightweight and low-cost 5G filters has become a technical problem that needs to be solved urgently in the current communications field. Utility Model Content

[0005] In order to solve the technical problems raised in the background technology, the utility model provides an adjustable sheet metal filter, which overcomes the above problems through structural improvement.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] An adjustable sheet metal filter comprises a die-cast cavity, a debugging screw and a reed are arranged on the top of the die-cast cavity, and two connectors are symmetrically arranged on one side of the die-cast cavity; a sealing cover plate is threadedly installed on the bottom of the die-cast cavity, and a resonance component is arranged on the sealing cover plate facing the die-cast cavity, and the resonance component is composed of a resonance rod and an M-shaped protrusion, and the resonance rod is surrounded on the sealing cover plate to form a resonance cavity with a notch, and the two ends of the resonance rod are respectively connected to a connector; the M-shaped protrusion has an even number and is aligned front to back along the length direction. The pole-coupled metal sheet No. 1 is distributed on the resonance rod; a pole-coupled metal sheet No. 1 connected to the sealing cover is arranged inside the resonance cavity, and an insulating medium covering the pole-coupled metal sheet No. 1 is arranged on the sealing cover; a pole-coupled metal sheet No. 2 and a pole-coupled metal sheet No. 3 connected to the resonance component are arranged in the resonance cavity along the width direction, and the pole-coupled metal sheet No. 2 and the pole-coupled metal sheet No. 3 are distributed on both sides of the resonance cavity, and the pole-coupled metal sheet No. 1 and the insulating medium are in the area enclosed by the pole-coupled metal sheet No. 3 and the resonance rod.

[0008] As a further improvement of an embodiment of the utility model, the resonant rod and the M-shaped protrusion are integrally formed by stamping a plate of equal thickness. The bending process of the plate of equal thickness can greatly reduce the weight of the product and reduce the transportation cost of delivery.

[0009] As a further improvement of an embodiment of the utility model, the sealing cover plate is provided with a plurality of embedding grooves for assembling the resonance rod, and the sealing cover plate and the resonance rod are fixedly connected by laser welding.

[0010] As a further improvement of an embodiment of the utility model, the upper end surface of the M-shaped protrusion is a plane, and a screw tuning hole used in conjunction with a debugging screw is provided in the central area of ​​the plane.

[0011] As a further improvement of an embodiment of the utility model, there are two spring leaves, which are arranged at the air avoidance holes of the die-casting cavity and block the air avoidance holes.

[0012] As a further improvement of an embodiment of the utility model, the two ends of the third pole coupling metal sheet are bent and connected to the lower ends of a pair of opposite M-shaped protrusions to form a symmetrical negative coupling.

[0013] As a further improvement of an embodiment of the utility model, the two ends of the second pole coupling metal sheet are staggered and laser welded on the resonant rod.

[0014] As a further improvement of an embodiment of the utility model, a solder paste layer is provided between the sealing cover plate and the die-casting cavity.

[0015] As a further improvement of an embodiment of the utility model, the insulating medium is distributed in the upper and lower parts of the insulating medium No. 1 and the insulating medium No. 2, the upper end of the insulating medium No. 1 is arranged on the die-casting cavity, and the lower end of the insulating medium No. 2 is arranged on the sealing cover plate; the pole coupling metal sheet No. 1 is arranged between the insulating medium No. 1 and the insulating medium No. 2.

[0016] The adoption of the above technical solution has the following beneficial effects: through the application of resonant components, the requirements of 5G massive antenna MIMO for light weight and integration of RF devices can be met, making the entire product small in size and wide in continuous bandwidth, which can better meet the high-density and low-price 5G usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0019] Figure 1 This is a structural schematic diagram provided by the utility model.

[0020] Figure 2 This is a schematic diagram of the distribution status of various components on the sealing cover provided by the utility model.

[0021] Figure 3 This is a product test curve diagram provided by the utility model.

[0022] In the figure:

[0023] 1- Die casting cavity;

[0024] 2- Sealing cover plate;

[0025] 3-resonance assembly; 31-resonance rod; 32, 321, 322, 323, 324, 325-M-shaped protrusions;

[0026] 4- No. 1 pole coupling metal sheet;

[0027] 5- No. 1 insulating medium;

[0028] 6- No. 3 pole coupling metal sheet;

[0029] 7- No. 2 insulating medium component;

[0030] 8- No. 2 pole coupling metal sheet;

[0031] 9-Debugging screw;

[0032] 10-reed;

[0033] 11-Connector. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention. Example

[0037] See also Figure 1 As shown, an adjustable sheet metal filter includes a die-cast cavity 1, a debugging screw 9 and a reed 10 are arranged on the top of the die-cast cavity 1, and two connectors 11 are symmetrically arranged on one side of the die-cast cavity 1.

[0038] A sealing cover plate 2 is threadedly mounted on the bottom of the die-casting cavity 1, and a resonance component 3 is arranged on the side of the sealing cover plate 2 facing the die-casting cavity 1. The resonance component 3 is composed of a resonance rod 31 and an M-shaped protrusion 32. The resonance rod 31 is surrounded on the sealing cover plate 2 to form a resonance cavity with a notch, and the two ends of the resonance rod 31 are respectively connected to a connector 11. There are an even number of M-shaped protrusions 32 and they are symmetrically distributed on the resonance rod 31 along the length direction.

[0039] A pole-coupled metal sheet No. 1 4 connected to the sealing cover plate 2 is arranged inside the resonant cavity, and an insulating medium covering the pole-coupled metal sheet No. 1 4 is arranged on the sealing cover plate 2; a pole-coupled metal sheet No. 2 8 and a pole-coupled metal sheet No. 3 6 connected to the resonant component 3 are arranged in the resonant cavity along the width direction, and the pole-coupled metal sheet No. 2 8 and the pole-coupled metal sheet No. 3 6 are distributed on both sides of the resonant cavity, and the pole-coupled metal sheet No. 1 4 and the insulating medium are in the area enclosed by the pole-coupled metal sheet No. 3 6 and the resonant rod 31.

[0040] In this embodiment, the die-casting cavity 1 is manufactured by die-casting process, and its overall structure is square. This square structure design not only has advantages in space utilization, but also provides a stable foundation for the installation and layout of internal components. The lower end of the die-casting cavity 1 is provided with an opening for assembly with the sealing cover plate 2.

[0041] The sealing cover plate 2 is used to completely cover and seal the lower opening of the die-casting cavity 1 to ensure the stability and sealing of the internal structure of the filter. When installing the sealing cover plate 2, it is necessary to brush high-temperature solder paste on the sealing cover plate 2 or the die-casting cavity 1 outside the opening, and then lock the sealing cover plate 2 on the die-casting cavity 1 with bolts. In this process, it is necessary to ensure that the tightening degree of the bolts is moderate, which can ensure the tight connection between the sealing cover plate 2 and the die-casting cavity 1, and will not cause damage to the components due to over-tightening.

[0042] After installation, as the assembly cools, a solder paste layer will form between the sealing cover plate 2 and the die-casting cavity 1. This solder paste layer, on the one hand, enhances the connection strength between the sealing cover plate 2 and the die-casting cavity 1, making the entire structure more stable; on the other hand, it also has a good sealing effect, effectively preventing external dust, moisture and other impurities from entering the filter, thereby ensuring the performance and service life of the filter.

[0043] The resonant component 3 of the utility model is composed of a resonant rod 31 and an M-shaped protrusion 32. In the manufacturing process, a plate of equal thickness is used to integrally form the resonant rod 31 and the M-shaped protrusion 32 through a sheet metal stamping process, and this component is a copper metal component with a silver-plated surface. The integrated stamping molding does not require bending, and the processing is simpler. It can also avoid the tolerance caused by the bending angle, and the product consistency is better.

[0044] Copper has good electrical and thermal conductivity. Using copper as a manufacturing material can effectively improve the performance and working efficiency of the resonant component. The one-piece manufacturing method not only ensures the stability of the connection between the resonant rod 31 and the M-shaped protrusion 32, but also facilitates standardized production and improves production efficiency and product quality consistency.

[0045] The sealing cover plate 2 is provided with a number of grooves for assembling the resonance rod 31. The size and position of these grooves are precisely designed to match the resonance rod 31. During installation, the resonance rod 31 is embedded in the corresponding groove to achieve preliminary positioning and assembly. In addition, in order to further ensure the firmness and stability of the connection between the resonance rod 31 and the sealing cover plate 2, the two are fixedly connected by laser welding. Laser welding has the advantages of fast welding speed, narrow weld, and small heat-affected zone. It can minimize the thermal impact on surrounding materials while ensuring the strength of the connection, thereby ensuring the connection accuracy and performance of the sealing cover plate 2 and the resonance rod 31. At the same time, the use of laser welding technology can increase the operating temperature of the product, and improve the reliability and stability of the product compared to the original solder paste welding.

[0046] In this embodiment, a unique design is provided for adjusting the frequency of the resonant cavity. Specifically, by adjusting the spacing between two adjacent M-shaped protrusions 32, the width and length of the M-shaped protrusions 32, the frequency of the resonant cavity can be precisely controlled. This adjustment method is based on a deep understanding and application of the resonance principle. By changing the geometric parameters of the M-shaped protrusions 32, the electromagnetic field distribution of the resonant cavity can be effectively changed, thereby achieving a change in the resonant frequency.

[0047] At the same time, the upper end surface of the M-shaped protrusion 32 is a "plane", and a screw tuning hole used in conjunction with the debugging screw 9 is provided in the central area of ​​the plane. The use of the debugging screw 9 and the screw tuning hole provides the possibility of obtaining a larger resonant frequency tuning amount. When the debugging screw 9 rotates and moves, the electromagnetic field distribution around the M-shaped protrusion 32 will be changed, thereby achieving fine adjustment of the resonant frequency, thereby meeting the precise frequency requirements in different application scenarios.

[0048] In addition, by adjusting the thickness and height of the resonant rod 31, the coupling amount between two adjacent M-shaped protrusions 32 can be adjusted, thereby obtaining the corresponding coupling amount required for the passband. This adjustment method makes the filter more flexible and controllable in the design of the passband characteristics, and can accurately design key parameters such as the passband width, center frequency, and insertion loss according to actual needs.

[0049] It is worth mentioning that the present embodiment adopts a plate bending process of equal thickness. On the one hand, this process can greatly reduce the weight of the product. Compared with the traditional manufacturing process, the lighter weight is easier to install and maintain in practical applications, especially in some application scenarios with strict requirements on weight, such as portable communication equipment, etc., which has significant advantages. On the other hand, the reduction in product weight can also reduce the transportation cost of delivery. In the process of large-scale production and transportation, the lighter product weight means that more products can be loaded in the same transport vehicle, or the energy consumption and cost during transportation can be reduced, thereby improving the market competitiveness and economic benefits of the product.

[0050] Combination Figure 2 As shown, in this embodiment, there are ten M-shaped protrusions 32, which are symmetrically distributed on the resonant rods 31 on both sides of the resonant cavity. For a clear description, the five pairs of M-shaped protrusions 32 are named 321, 322, 323, 324, and 325 from left to right, and the side close to the connector 11 is named as the lower side, and the side away from the connector 11 is named as the upper side.

[0051] In the structure of the present filter, the two ends of the third pole coupling metal sheet 6 are bent and connected to the lower ends of a pair of opposite M-shaped protrusions 32, thereby forming a symmetrical negative coupling. Specifically, the two ends of the third pole coupling metal sheet 6 are respectively connected to the lower left end of the M-shaped protrusion 324. This connection method enables the signal to be coupled between the third pole coupling metal sheet 6 and the M-shaped protrusion 324 during transmission, thereby achieving the selection and transmission of a specific frequency.

[0052] The two ends of the second pole coupling metal sheet 8 are designed with staggered distribution and fixed on the resonant rod 31 by laser welding. In detail, the upper end of the second pole coupling metal sheet 8 is connected to the resonant rod 31 on the right side of the upper M-shaped protrusion 321, and the lower end of the second pole coupling metal sheet 8 is connected to the resonant rod 31 on the left side of the lower M-shaped protrusion 322, forming a positive coupling. This unique connection method and layout changes the electromagnetic field distribution inside the filter, thereby realizing the coupling and transmission of signals of different frequencies.

[0053] Through this special design and connection method of the second pole coupling metal sheet 8 and the third pole coupling metal sheet 6, the utility model has significant advantages compared with the traditional 4G coaxial cavity filter. First of all, in terms of meeting the requirements of 5G massive antenna MIMO for RF devices, this filter achieves the requirements of light weight and integration. In the 5G communication system, due to the substantial increase in the number of base stations and equipment, the weight and volume requirements for RF devices are more stringent. The lightweight design and integrated structure of this filter enable it to better adapt to the deployment requirements of 5G networks.

[0054] Through the special design and connection of the No. 2 pole coupling metal sheet 8 and the No. 3 pole coupling metal sheet 6, the utility model has significant advantages in performance, production efficiency and cost control, and provides strong support for the development of the 5G communication field.

[0055] In this embodiment, the insulating medium is composed of a No. 1 insulating medium 5 and a No. 2 insulating medium assembly 7 which are distributed up and down. In terms of installation layout, the upper end of the No. 1 insulating medium 5 is arranged on the die-casting cavity 1, and the lower end of the No. 2 insulating medium 7 is arranged on the sealing cover plate 2. The No. 1 pole coupling metal sheet 4 is arranged between the No. 1 insulating medium 5 and the No. 2 insulating medium assembly 7.

[0056] In addition, the first insulating medium 5 and the second insulating medium assembly 7 are clamped in the clamping groove of the partition wall inside the die-casting cavity 1, and a symmetrical tuning coupling is formed through such an installation method. This symmetrical tuning coupling structure helps to improve the performance and stability of the filter, so that the filter can filter the signal more accurately.

[0057] In actual work, the insulating medium can effectively prevent the short circuit between the first pole coupling metal sheet 4 and other components, ensuring the normal operation of the circuit. At the same time, its symmetrical tuning coupling design provides strong support for the filter to achieve efficient and stable filtering function.

[0058] In the adjustable sheet metal filter of this embodiment, there are two reeds 10. These reeds 10 are arranged at the air avoidance holes of the die-casting cavity 1 and completely block the air avoidance holes.

[0059] During the installation process, the reed 10 is pressed onto the die-casting cavity 1 by a tool. This installation method enables the reed 10 to be stably fixed at a specified position.

[0060] The reed 10 plays an important role in shielding signals in the filter. It can effectively prevent external interference signals from entering the filter, and also prevent the signals inside the filter from leaking out, thereby ensuring the stability and reliability of the filter, improving the signal processing performance of the filter, and providing a strong guarantee for the normal operation of electronic equipment.

[0061] The implementation steps of this embodiment are as follows:

[0062] 1. Assemble and fix the resonance component 3 in the groove on the sealing cover plate 2.

[0063] 2. Use laser welding technology to ensure that the sealing cover plate 2, the resonance component 3, and the second pole coupling metal sheet 8 are well welded.

[0064] 3. Clamp the pole coupling metal sheet 4 between the No. 1 insulating medium 5 and the No. 2 insulating medium assembly 7, and clamp the No. 1 insulating medium 5 and the No. 2 insulating medium assembly 7 in the clamping groove of the partition wall of the die-casting cavity.

[0065] 4. The resonant component 3 is welded or tightly and firmly contacted with the connector 11 to allow signal input and output.

[0066] 5. The reed 10 is pressed into the die-casting cavity 1 by a tool to shield the signal.

[0067] 6. Use a tool to brush high-temperature solder paste on the outer periphery of the opening of the die-casting cavity 1 and lock it with the sealing cover plate 2.

[0068] 7. Install the debugging screw 9 onto the die casting cavity 1 until the debugging is completed. The test curve is as follows: Figure 3 shown.

[0069] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0070] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0071] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0072] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An adjustable sheet metal filter, characterized in that: The invention comprises a die-casting cavity, wherein a debugging screw and a spring are arranged on the top of the die-casting cavity, and two connectors are symmetrically arranged on one side of the die-casting cavity; a sealing cover plate is threadedly installed on the bottom of the die-casting cavity, and a resonance component is arranged on the sealing cover plate toward the die-casting cavity, wherein the resonance component is composed of a resonance rod and an M-shaped protrusion, wherein the resonance rod is surrounded on the sealing cover plate to form a resonance cavity with a notch, and the two ends of the resonance rod are respectively connected to a connector; the M-shaped protrusions are in an even number and are symmetrically distributed on the resonance rod in the front and back direction along the length direction; a No. 1 pole coupling metal sheet connected to the sealing cover plate is arranged inside the resonance cavity, and an insulating medium covering the No. 1 pole coupling metal sheet is arranged on the sealing cover plate; a No. 2 pole coupling metal sheet and a No. 3 pole coupling metal sheet connected to the resonance component are arranged in the resonance cavity along the width direction, wherein the No. 2 pole coupling metal sheet and the No. 3 pole coupling metal sheet are distributed on both sides of the resonance cavity, and the No. 1 pole coupling metal sheet and the insulating medium are located in the area surrounded by the No. 3 pole coupling metal sheet and the resonance rod.

2. The adjustable sheet metal filter according to claim 1, characterized in that: The resonant rod and the M-shaped protrusion are integrally formed by using equal-thickness plates through sheet metal stamping.

3. The adjustable sheet metal filter according to claim 2, characterized in that: The sealing cover plate is provided with a plurality of embedding grooves for assembling the resonance rod, and the sealing cover plate and the resonance rod are fixedly connected by laser welding.

4. The adjustable sheet metal filter according to claim 1, characterized in that: The upper end surface of the M-shaped protrusion is a plane, and a screw tuning hole used in conjunction with a debugging screw is arranged in the central area of ​​the plane.

5. The adjustable sheet metal filter according to claim 1, characterized in that: The number of the reed sheets is two, which are arranged at the air avoidance holes of the die-casting cavity and block the air avoidance holes.

6. The adjustable sheet metal filter according to claim 1, characterized in that: The two ends of the third pole coupling metal sheet are bent and connected to the lower ends of a pair of opposite M-shaped protrusions to form a symmetrical negative coupling.

7. The adjustable sheet metal filter according to claim 1, characterized in that: The two ends of the second pole coupling metal sheet are staggered and distributed and laser welded on the resonant rod.

8. The adjustable sheet metal filter according to claim 1, characterized in that: A solder paste layer is arranged between the sealing cover plate and the die-casting cavity.

9. The adjustable sheet metal filter according to claim 1, characterized in that: The insulating medium is distributed in the upper and lower parts of the No. 1 insulating medium and the No. 2 insulating medium components, the upper end of the No. 1 insulating medium is arranged on the die-casting cavity, and the lower end of the No. 2 insulating medium is arranged on the sealing cover plate; the No. 1 pole coupling metal sheet is arranged between the No. 1 insulating medium and the No. 2 insulating medium components.

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