阅读说明：本技术 一种腔体滤波器 (Cavity filter ) 是由 吴秀山 闫树斌 徐霖 史浩然 徐代靖 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种腔体滤波器,包括腔体,所述腔体的一侧设置有多个安装腔室,并在每个安装腔室内安装有谐振杆,所述腔体在靠近多个安装腔室的顶部一侧密封覆盖有盖板,且所述盖板顶部固定安装有多做固定座,所述固定座的底部均固定连接有调节筒,且所述调节筒均贯穿盖板,并在盖板的底侧均连接有调谐杆,所述调谐杆分别与谐振杆一一对应。该种腔体滤波器,结构简单合理,设计新颖,操作简单,并有效解决了传统腔体滤波器装配调试机构的工作量大、难以实现微调、调试工作量大、耗费工时多、调试难度高、对调试人员要求高和制造成本高的技术问题,具有较高的普及使用价值。(The invention discloses a cavity filter, which comprises a cavity, wherein a plurality of installation cavities are arranged on one side of the cavity, a resonance rod is installed in each installation cavity, a cover plate is hermetically covered on one side of the cavity close to the tops of the installation cavities, a plurality of fixing seats are fixedly installed on the top of the cover plate, adjusting cylinders are fixedly connected to the bottoms of the fixing seats, the adjusting cylinders penetrate through the cover plate, tuning rods are connected to the bottom side of the cover plate, and the tuning rods correspond to the resonance rods one by one. The cavity filter is simple and reasonable in structure, novel in design and simple in operation, effectively solves the technical problems that the traditional cavity filter assembling and debugging mechanism is large in workload, difficult to achieve fine adjustment, large in debugging workload, large in consumed working hours, high in debugging difficulty, high in debugging personnel requirement and high in manufacturing cost, and has high popularization and use values.)

1. The utility model provides a cavity filter, includes cavity (1), one side of cavity (1) is provided with a plurality of installation cavity (2) to install resonance bar (3) in every installation cavity (2), its characterized in that, cavity (1) has apron (4) in the sealed cover of top one side that is close to a plurality of installation cavity (2), just apron (4) top fixed mounting has fixing base (5) of doing more, the equal fixedly connected with in bottom of fixing base (5) adjusts a section of thick bamboo (8), just adjust a section of thick bamboo (8) and all run through apron (4) to all be connected with tuning rod (12) in the bottom side of apron (4), tuning rod (12) respectively with resonance bar (3) one-to-one.

2. The cavity filter according to claim 1, wherein the adjusting cylinder (8) is internally provided with an adjusting air cushion (9), an adjusting plate (10) is fixedly connected to the bottom end of the adjusting air cushion (9), and the adjusting plate (10) is fixedly connected to the top end of the tuning rod (12).

3. The cavity filter according to claim 2, wherein an inflation nozzle (6) is fixedly installed at the top end of the fixed seat (5), an air pipe (7) is connected to the bottom end of the inflation nozzle (6), and the air pipe (7) is communicated with the adjusting air cushion (9).

4. The cavity filter according to claim 1, wherein a shrinkage hole is formed at the bottom end of the adjusting cylinder (8), the aperture of the shrinkage hole is slightly larger than the diameter of the tuning rod (12), a spring (11) is installed at the bottom of the inner side of the adjusting cylinder (8), the spring (11) is sleeved on the outer side of the tuning rod (12), and the top end of the spring (11) is abutted against the bottom side of the adjusting plate (10).

5. The cavity filter according to claim 1, wherein the top end of the adjusting cylinder (8) is provided with a connecting thread at its periphery, the bottom of the fixing seat (5) is provided with a threaded hole, and the threaded hole can be fixedly connected with the top end of the adjusting cylinder (8) by a thread.

6. A cavity filter according to claim 1, wherein the cavity (1) is made by pressing and sintering ceramic powder.

7. The cavity filter according to claim 1, wherein the cover plate (4) is fixedly connected with the cavity (1) through screws, and the cover plate (4) is made of engineering plastics and is plated with a metal layer on the surface.

8. The cavity filter according to claim 2, wherein the top end of the charging connector (6) is provided with a connecting thread on the outer side, and a sealing cover is connected with the connecting thread.

Technical Field

The invention relates to the technical field of filters, in particular to a cavity filter.

Background

The filter is a key device of a modern mobile communication system and is widely applied to wireless communication base stations. The cavity filter is a microwave filter adopting a resonant cavity structure, and one cavity can be equivalent to an inductor and a capacitor connected in parallel, so that a resonant level is formed, and the microwave filtering function is realized. The cavity filter has the advantages of firm structure, wide frequency band, long high-end parasitic pass band, small volume, moderate Q value, flat in-band amplitude-frequency characteristic, stable performance and good heat dissipation performance, and is widely applied to front-end filtering of various large communication base stations to filter out-of-band strong interference signals.

The existing cavity filter can reach the designed performance index only by debugging. Generally, a cavity filter is debugged manually, the cavity filter is connected with a network analyzer, tuning screws are screwed clockwise or anticlockwise, the heights of the tuning screws extending into a cavity are adjusted one by one, then the distance between the tuning screws and a resonance rod is changed, the resonance frequency of a resonance unit of the filter and the coupling amount between the resonance units are changed, the performance change of the cavity filter is observed in real time through the network analyzer, the height of each tuning screw is repeatedly adjusted until the height combination of all the tuning screws meets the performance index of the cavity filter, and finally, a locking nut is screwed to lock the position of each tuning screw. However, in the assembly and debugging process of the cavity filter, the problems of large workload of an assembly and debugging mechanism, difficulty in fine adjustment, large debugging workload, long debugging time, high debugging difficulty, high requirement on debugging personnel and high manufacturing cost often exist, and the actual production requirement is difficult to meet. We therefore improve this and propose a cavity filter.

Disclosure of Invention

In order to solve the problems of large workload of an assembly debugging mechanism, difficulty in fine adjustment, large debugging workload, long debugging time, high debugging difficulty, high requirement on debugging personnel and high manufacturing cost in the traditional cavity filter assembly debugging process, the invention provides the following technical scheme:

the invention relates to a cavity filter which comprises a cavity, wherein a plurality of installation cavities are arranged on one side of the cavity, a resonance rod is installed in each installation cavity, a cover plate is hermetically covered on one side of the cavity close to the tops of the installation cavities, a plurality of fixing seats are fixedly installed on the tops of the cover plates, adjusting cylinders are fixedly connected to the bottoms of the fixing seats, the adjusting cylinders penetrate through the cover plates, tuning rods are connected to the bottom sides of the cover plates, and the tuning rods correspond to the resonance rods one by one.

As a preferable technical scheme of the invention, an adjusting air cushion is arranged in the adjusting cylinder, the bottom end of the adjusting air cushion is fixedly connected with an adjusting plate, and the adjusting plate is fixedly connected with the top end of the tuning rod.

As a preferable technical scheme of the invention, an inflation nozzle is fixedly installed at the top end of the fixed seat, an air pipe is connected to the bottom end of the inflation nozzle, and the air pipe is communicated with the adjusting air cushion.

As a preferred technical scheme of the invention, a shrinkage cavity is arranged at the bottom end of the adjusting cylinder, the aperture of the shrinkage cavity is slightly larger than the diameter of the tuning rod pair, a spring is arranged at the bottom of the inner side of the adjusting cylinder, the spring is sleeved on the outer side of the tuning rod, and the top end of the spring is abutted against the bottom side of the adjusting plate.

As a preferable technical scheme of the invention, the periphery of the top end of the adjusting cylinder is provided with connecting threads, the bottom of the fixed seat is provided with a threaded hole, and the threaded hole can be fixedly connected with the top end of the adjusting cylinder through threads.

As a preferable technical scheme of the invention, the cavity is made by pressing and sintering ceramic powder.

As a preferable technical scheme of the invention, the cover plate is fixedly connected with the cavity through a screw, is made of engineering plastics, and is plated with a metal layer on the surface.

As a preferred technical scheme of the invention, the outer side of the top end of the inflating nozzle is provided with a connecting thread, and the connecting thread is connected with a sealing cover.

Compared with the prior art, the invention has the beneficial effects that:

according to the cavity filter, the inflation pump is connected with the inflation nozzle externally, the adjustment air cushion is inflated, the adjustment air cushion expands and extends after being inflated, the adjustment plate is adjusted downwards quickly, the tuning rod is adjusted quickly, the assembly and debugging efficiency of the cavity filter is improved conveniently, meanwhile, the micro adjustment of the adjustment air cushion is realized by controlling the inflation quantity, and the precise adjustment of the cavity filter is facilitated; the cavity filter is simple and reasonable in structure, novel in design and simple in operation, effectively solves the technical problems of large workload, difficulty in fine adjustment, large debugging workload, high consumed working hours, high debugging difficulty, high requirement on debugging personnel and high manufacturing cost of the traditional cavity filter assembling and debugging mechanism, and has high popularization and use values.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of a cavity filter according to the present invention;

fig. 2 is a schematic view of a fixing base structure of a cavity filter according to the present invention.

In the figure: 1. a cavity; 2. installing a chamber; 3. a resonant rod; 4. a cover plate; 5. a fixed seat; 6. an air charging nozzle; 7. an air tube; 8. an adjusting cylinder; 9. adjusting the air cushion; 10. an adjusting plate; 11. a spring; 12. a tuning rod.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example (b): as shown in fig. 1-2, the cavity filter of the present invention includes a cavity 1, wherein one side of the cavity 1 is provided with a plurality of installation chambers 2, and a resonance rod 3 is installed in each installation chamber 2, one side of the cavity 1 close to the tops of the plurality of installation chambers 2 is hermetically covered with a cover plate 4, the top of the cover plate 4 is fixedly installed with a plurality of fixing seats 5, the bottoms of the fixing seats 5 are fixedly connected with adjustment cylinders 8, the adjustment cylinders 8 penetrate through the cover plate 4, the bottom side of the cover plate 4 is connected with tuning rods 12, and the tuning rods 12 respectively correspond to the resonance rods 3 one to one.

Wherein, the inside of adjusting a section of thick bamboo 8 is installed and is adjusted air cushion 9, the bottom fixedly connected with of adjusting air cushion 9 adjusts board 10, just adjust board 10 and the top fixed connection of tuning rod 12.

Wherein, the top end fixed mounting of fixing base 5 has charging connector 6, the bottom of charging connector 6 is connected with trachea 7, just trachea 7 and regulation air cushion 9 intercommunicate.

Wherein, the bottom of adjusting a section of thick bamboo 8 is provided with the shrinkage cavity, just the aperture of shrinkage cavity slightly is greater than tuning rod 12 right diameter, adjust the inboard bottom of a section of thick bamboo 8 and install spring 11, spring 11 cover is established in the outside of tuning rod 12, just spring 11 top offsets with the bottom side of regulating plate 10 and sets up.

Wherein, the top periphery of adjusting a section of thick bamboo 8 is equipped with connecting thread, the bottom of fixing base 5 is provided with the screw hole, just the screw hole can pass through thread fixed connection with the top of adjusting a section of thick bamboo 8.

Wherein, the cavity 1 is made by pressing and sintering ceramic powder.

The cover plate 4 is fixedly connected with the cavity 1 through a screw, the cover plate 4 is made of engineering plastics, and a metal layer is plated on the surface of the cover plate.

Wherein, the outer side of the top end of the charging connector 6 is provided with a connecting thread and is connected with a sealing cover through the connecting thread.

The working principle is as follows: when the cavity filter is used, the adjusting air cushion 9 is inflated by externally connecting the inflating nozzle 6 with an inflating pump, the adjusting air cushion 9 expands and extends after being inflated, the adjusting plate 10 is quickly adjusted downwards, the tuning rod 12 is quickly adjusted, the assembly and debugging efficiency of the cavity filter is further improved conveniently, meanwhile, the micro-adjustment of the adjusting air cushion 9 is realized by controlling the inflating amount, and the precise adjustment of the cavity filter is further facilitated; the cavity filter is simple and reasonable in structure, novel in design and simple in operation, effectively solves the technical problems of large workload, difficulty in fine adjustment, large debugging workload, high consumed working hours, high debugging difficulty, high requirement on debugging personnel and high manufacturing cost of the traditional cavity filter assembling and debugging mechanism, and has high popularization and use values.

Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.