CN214589183U

CN214589183U - Filter, resonator and communication device

Info

Publication number: CN214589183U
Application number: CN202120675795.1U
Authority: CN
Inventors: 谢懿非; 黄友胜; 丁海; 林显添
Original assignee: Comba Telecom Technology Guangzhou Ltd; Jingxin RF Technology Guangzhou Co ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd; Jingxin RF Technology Guangzhou Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-11-02
Anticipated expiration: 2031-04-02

Abstract

The utility model relates to a wave filter, syntonizer and communication device, the in-process that the temperature of wave filter is floated is reduced to height dimension h2 through the height dimension h1 of optimizing metal resonance pole and boss, because adjusting screw can not receive the restriction of syntonizer and boss in the position in-process from top to bottom, metal resonance pole need not like considering the interval between metal resonance pole and the boss top surface in the in-process that reduces height dimension h1 promptly, height dimension h1 of metal resonance pole can be according to the nimble setting of actual demand, the scope that can adjust is great, height dimension h2 of boss can set up according to actual demand is nimble equally, the scope that can adjust is great, make can control the product temperature and float for predetermineeing the within range; furthermore, in order to reduce the temperature drift of the filter, the temperature drift of the filter can be controlled to be within a preset range by selecting iron materials with low cost instead of copper materials with high cost, so that the product cost can be reduced at the same time.

Description

Filter, resonator and communication device

Technical Field

The utility model relates to a communication device technical field especially relates to a wave filter, syntonizer and communication device.

Background

With the rapid development of communication systems entering the 5G era, 700MHz operation at low frequency exists in 100MHz-960MHz, and a plurality of commercial frequency bands exist, so that each frequency band needs to be restrained quite, which puts requirements on the restraint of a filter, and particularly, the restraint is required to be prevented from deteriorating in high and low temperature states.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a conventional filter structure. The conventional filter includes a metal resonator 110, a boss 120 disposed on a bottom wall of the metal resonator 110, a metal resonator 140 fixedly mounted on the boss 120 by a screw 130, a cover plate 150 covering a mouth of the metal resonator 110, and an adjusting screw 160 mounted on the cover plate 150 with a height position adjustable. The resonant frequency of the filter can be adjusted by rotating the adjusting screw 160 to control the depth of the adjusting screw 160 extending into the metal resonant cavity 110. In the process of designing a product, the temperature drift of the filter is usually required to be simulated and matched. The height of the metal resonator 140 is H1 (i.e., the distance between the bottom end surface of the metal resonator 140 and the top end surface of the metal resonator 140), the height of the boss 120 is H2 (i.e., the distance between the top surface of the boss 120 and the bottom wall surface of the metal resonator 110), and the distance between the end surface of the adjusting screw 160 and the screw 130 is H3. Simulation tests show that when H1 is smaller, H2 is larger, and the temperature drift of the filter product is correspondingly smaller.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating the frequency variation of the product with temperature after the optimization of the dimension H1 and the dimension H2 (the dimension H1 is adjusted to the minimum and the dimension H2 is adjusted to the maximum) of the conventional filter, and it can be observed in fig. 2 that the temperature drift of the product can be improved to about 0.2MHz at the normal temperature of 25 ° to 85 °. However, the distance H3 between the end face of the adjusting screw 160 and the screw 130 is small, which results in a filter product with poor productivity and limits the frequency adjusting range of the adjusting screw 160. In addition, the material of the resonator is replaced by copper, and although the temperature drift is reduced to a certain extent, the copper increases the product cost.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing, there is a need to overcome the drawbacks of the prior art and to provide a filter, a resonator and a communication device, which can control the temperature drift of the product while ensuring a low cost of the product.

The technical scheme is as follows: a filter, the filter comprising: the metal resonant cavity is provided with a bottom wall surface and an opening opposite to the bottom wall surface, a boss is arranged on the bottom wall surface, a concave part is arranged on the boss, and first threads are arranged on the inner wall surface of the concave part; the cover body is arranged on the opening in a covering manner, the adjusting screw is adjustably arranged on the cover body in position, and the adjusting screw extends into the metal resonant cavity; the resonator comprises a metal resonance rod, the metal resonance rod is provided with a through hole, the through hole extends from one end face of the metal resonance rod to the other end face of the metal resonance rod, a second thread matched with the first thread is arranged on the outer wall of the metal resonance rod, the metal resonance rod is arranged in the concave part, and the adjusting screw rod can extend into the through hole and the concave part in the process of adjusting the position on the cover body.

In the filter and the resonator, the resonator is not required to be fixed on the boss through a screw, but is inserted into the concave part of the boss through the outer wall in a screwing mode as in the traditional technology, on one hand, the assembly is convenient and quick, on the other hand, the metal resonance rod can be provided with the through hole in a hollow structure, so that the adjusting screw rod can extend into the through hole and the concave part in the process of adjusting the position on the cover body, namely, the adjusting screw rod cannot be limited in the process of adjusting the position up and down, and therefore, the filter and the resonator have a large frequency adjusting range. In addition, in the process of reducing the temperature drift of the filter by optimizing the height dimension h1 of the metal resonance rod and the height dimension h2 of the boss, the position of the adjusting screw rod is not limited by the resonator and the boss in the process of adjusting the position up and down, namely the metal resonance rod does not need to consider the distance between the metal resonance rod and the top surface of the boss in the process of reducing the height dimension h1 as in the traditional product, the height dimension h1 of the metal resonance rod can be flexibly set according to actual requirements, the adjustable range is large, the height dimension h2 of the boss can also be flexibly set according to the actual requirements, the adjustable range is large, and the temperature drift of the product can be controlled to be within the preset range; furthermore, in order to reduce the temperature drift of the filter, the temperature drift of the filter can be controlled to be within a preset range by selecting iron materials with low cost instead of copper materials with high cost, so that the product cost can be reduced at the same time.

In one embodiment, the metal resonance bar comprises a first and a second segment connected to each other; the second thread is wound on the outer wall of the first component section; the outer diameter of the first component section is smaller than that of the second component section, and one end face of the second component section close to the first component section is abutted against the table face of the boss.

In one embodiment, the through-hole comprises a first bore segment disposed on the first body segment and a second bore segment disposed on the second body segment, the first bore segment in communication with the second bore segment; the first hole section is a hexagonal hole, an octagonal hole, a quincuncial hole, a square hole, a triangular hole or an elliptical hole.

In one embodiment, the resonator, the boss and the adjusting screw are coaxially arranged.

In one embodiment, the resonator is made of impervious steel, free-cutting steel, 45 steel, indium steel, aluminum material, copper material or iron material.

In one embodiment, the resonator further comprises a resonant disk disposed around an end of the metallic resonant rod remote from the boss.

In one embodiment, the number of the bosses is two or more, the number of the resonators is two or more, the number of the adjusting screws is two or more, and the two or more adjusting screws and the two or more resonators are all arranged in one-to-one correspondence with the two or more bosses.

In one embodiment, the filter further comprises a mounting member, and the cover is connected to the metal resonant cavity through the mounting member.

The resonator is used for being arranged on a boss on the bottom wall surface of a metal resonant cavity, a concave part is arranged on the boss, a first thread is arranged on the inner wall surface of the concave part, the resonator comprises a metal resonant rod, the metal resonant rod is provided with a through hole, the through hole extends from one end surface of the metal resonant rod to the other end surface of the metal resonant rod, a second thread matched with the first thread is arranged on the outer wall of the metal resonant rod, the metal resonant rod is arranged in the concave part, and the through hole and the concave part can avoid an adjusting screw rod of a filter.

The resonator does not need to be fixed on the boss through screws in the prior art, but is inserted into the concave part of the boss through the outer wall in a threaded manner, on one hand, the resonator is convenient and quick to assemble, on the other hand, the metal resonance rod can be provided with the through hole in a hollow structure, so that the adjusting screw rod can extend into the through hole and the concave part in the process of adjusting the position on the cover body, namely, the adjusting screw rod cannot be limited in the process of adjusting the position up and down, and therefore, the resonator has a large frequency adjusting range. In addition, in the process of reducing the temperature drift of the filter by optimizing the height dimension h1 of the metal resonance rod and the height dimension h2 of the boss, the position of the adjusting screw rod is not limited by the resonator and the boss in the process of adjusting the position up and down, namely the metal resonance rod does not need to consider the distance between the metal resonance rod and the top surface of the boss in the process of reducing the height dimension h1 as in the traditional product, the height dimension h1 of the metal resonance rod can be flexibly set according to actual requirements, the adjustable range is large, the height dimension h2 of the boss can also be flexibly set according to the actual requirements, the adjustable range is large, and the temperature drift of the product can be controlled to be within the preset range; furthermore, in order to reduce the temperature drift of the filter, the temperature drift of the filter can be controlled to be within a preset range by selecting iron materials with low cost instead of copper materials with high cost, so that the product cost can be reduced at the same time.

A communication device comprising said filter.

In the communication device, the resonator is not required to be fixed on the boss through a screw, but is inserted into the concave part of the boss through the outer wall in a threaded manner, as in the prior art, on one hand, the assembly is convenient and quick, and on the other hand, the metal resonance rod can be provided with the through hole in a hollow structure, so that the adjusting screw rod can extend into the through hole and the concave part in the process of adjusting the position on the cover body, namely, the adjusting screw rod cannot be limited in the process of adjusting the position up and down, and therefore, the communication device has a large frequency adjusting range. In addition, in the process of reducing the temperature drift of the filter by optimizing the height dimension h1 of the metal resonance rod and the height dimension h2 of the boss, the position of the adjusting screw rod is not limited by the resonator and the boss in the process of adjusting the position up and down, namely the metal resonance rod does not need to consider the distance between the metal resonance rod and the top surface of the boss in the process of reducing the height dimension h1 as in the traditional product, the height dimension h1 of the metal resonance rod can be flexibly set according to actual requirements, the adjustable range is large, the height dimension h2 of the boss can also be flexibly set according to the actual requirements, the adjustable range is large, and the temperature drift of the product can be controlled to be within the preset range; furthermore, in order to reduce the temperature drift of the filter, the temperature drift of the filter can be controlled to be within a preset range by selecting iron materials with low cost instead of copper materials with high cost, so that the product cost can be reduced at the same time.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

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

Fig. 1 is a schematic structural diagram of a conventional filter;

FIG. 2 is a diagram illustrating the variation of the product frequency with temperature after optimizing the H1 and H2 dimensions of a conventional filter;

fig. 3 is a schematic structural diagram of a filter according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a metal resonator of a filter according to an embodiment of the present invention, wherein the metal resonator is provided with a resonator;

fig. 5 is a schematic view of a structure of one of the viewing angles of the metal resonator of the filter according to an embodiment of the present invention;

fig. 6 is a schematic view of a resonator of a filter according to an embodiment of the present invention;

fig. 7 is a schematic view illustrating another structure of a resonator of a filter according to an embodiment of the present invention;

fig. 8 is a schematic view illustrating a structure of a resonator of a filter according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view at A-A of FIG. 8;

fig. 10 is a schematic diagram of the frequency variation of the product of the filter according to an embodiment of the present invention after optimizing the size h1 and the size h 2.

110. A metal resonant cavity; 120. a boss; 130. a screw; 140. a metal resonator; 150. a cover plate; 160. adjusting the screw rod;

210. a metal resonant cavity; 211. a bottom wall surface; 212. an opening; 213. a boss; 2131. a recess; 2132. a first thread; 220. a cover body; 230. adjusting the screw rod; 240. a resonator; 241. a metal resonance rod; 2411. a through hole; 2412. a second thread; 2413. a first component section; 2414. a second section; 242. a resonant disk; 250. and (4) a mounting piece.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 3 to 5, fig. 3 shows a schematic structural diagram of a filter according to an embodiment of the present invention, fig. 4 shows a schematic sectional structural diagram of a resonator 240 installed in a metal resonant cavity 210 of a filter according to an embodiment of the present invention, and fig. 5 shows one of the schematic structural diagrams of a viewing angle of the metal resonant cavity 210 of a filter according to an embodiment of the present invention. An embodiment of the present invention provides a filter, which includes a metal resonator 210, a cover 220, an adjusting screw 230 and a resonator 240.

Referring to fig. 3 to 5, the metal resonator 210 has a bottom wall 211 and an opening 212 opposite to the bottom wall 211. The boss 213 is provided on the bottom wall surface 211, the recessed portion 2131 is provided on the boss 213, and the first screw 2132 is provided on the inner wall surface of the recessed portion 2131. The cover 220 covers the opening 212. The adjusting screw 230 is adjustably disposed on the cover 220, and the adjusting screw 230 extends into the metal resonant cavity 210.

Referring to fig. 3, 6 to 9, fig. 6 shows a schematic view structural diagram of one of the resonators 240 of the filter according to an embodiment of the present invention, fig. 7 shows another schematic view structural diagram of the resonator 240 of the filter according to an embodiment of the present invention, fig. 8 shows another schematic view structural diagram of the resonator 240 of the filter according to an embodiment of the present invention, and fig. 9 shows a cross-sectional view of fig. 8 at a-a. The resonator 240 includes a metal resonance bar 241. The metal resonance rod 241 is provided with a through hole 2411, and the through hole 2411 extends from one end surface of the metal resonance rod 241 to the other end surface of the metal resonance rod 241. The outer wall of the metal resonance rod 241 is provided with a second thread 2412 adapted to the first thread 2132. The metal resonance bar 241 is installed in the recess 2131. The adjusting screw 230 can extend into the through hole 2411 and the recessed portion 2131 in the process of adjusting the position of the cover 220.

In the filter and the resonator 240, as in the conventional technology, the resonator is not fixed on the boss 213 by screws, for example, but is inserted into the recess 2131 of the boss 213 by screwing through the outer wall, on one hand, the assembly is convenient and fast, and on the other hand, the metal resonance rod 241 may be provided with the through hole 2411 in a hollow structure, so that the adjusting screw 230 can extend into the through hole 2411 and the recess 2131 in the process of adjusting the position on the cover 220, i.e., the adjusting screw 230 is not limited in the process of adjusting the position up and down, thereby having a large frequency adjusting range. In addition, in the process of reducing the temperature drift of the filter by optimizing the height dimension h1 of the metal resonance rod 241 and the height dimension h2 of the boss 213, because the position of the adjusting screw 230 can not be limited by the resonator 240 and the boss 213 in the process of adjusting the vertical position, that is, the metal resonance rod 241 does not need to consider the distance between the metal resonance rod 241 and the top surface of the boss 213 in the process of reducing the height dimension h1 as in the traditional product, the height dimension h1 of the metal resonance rod 241 can be flexibly set according to the actual requirement, the adjustable range is large, the height dimension h2 of the boss 213 can also be flexibly set according to the actual requirement, the adjustable range is large, and the temperature drift of the product can be controlled to be within the preset range; furthermore, in order to reduce the temperature drift of the filter, the temperature drift of the filter can be controlled to be within a preset range by selecting iron materials with low cost instead of copper materials with high cost, so that the product cost can be reduced at the same time.

Please refer to fig. 10, fig. 10 shows the schematic diagram of the frequency of the product after optimizing at size h1 and size h2 of the filter according to an embodiment of the present invention, as can be seen from fig. 10, the temperature drift of the product can be improved to about 0MHz when the temperature is 25 ° to 85 ° at normal temperature, compared with the conventional filter product, the temperature drift can be greatly reduced, meanwhile, the adverse condition that the screws installed on the adjusting screw 230 and the boss 213 affect each other in the conventional filter product does not exist, the normal production and processing can be ensured, and the production efficiency is high.

Referring to fig. 3, 6 and 9, in one embodiment, the metal resonant rod 241 includes a first component segment 2413 and a second component segment 2414 connected to each other. A second thread 2412 is provided around the outer wall of the first body section 2413. The first body segment 2413 has an outer diameter smaller than that of the second body segment 2414, and the end surface of the second body segment 2414 near the one end of the first body segment 2413 interferes with the surface of the boss 213. Thus, when the metal resonance rod 241 is mounted on the boss 213, the first body segment 2413 is screwed and fixed in the recess 2131, and the end surface of the second body segment 2414 and the top surface of the boss 213 are abutted against each other, so that the metal resonance rod 241 is stably mounted on the boss 213.

Referring to fig. 3 and 6, further, in the process of controlling the temperature drift of the filter to the predetermined range by adjusting the height h1 of the metal resonance rod 241, for example, by controlling and adjusting the length of the portion of the metal resonance rod 241 not provided with the second thread 2412, that is, by controlling and adjusting the length h3 of the second component section 2414, the temperature drift of the filter is controlled to the predetermined range, while the length of the first component section 2413 is generally kept unchanged, so as to ensure that the metal resonance rod 241 can be stably mounted on the boss 213.

Referring to fig. 3, 6 and 9, in one embodiment, the via 2411 includes a first bore section disposed on the first component section 2413 and a second bore section disposed on the second component section 2414. The first bore section is in communication with the second bore section. The first hole section is a hexagonal hole, an octagonal hole, a quincuncial hole, a square hole, a triangular hole or an elliptical hole. Thus, when the first hole section is a hexagonal hole, a hexagonal screwdriver can be correspondingly adopted to realize the dismounting operation of the resonator 240; when the first hole section is a quincuncial hole, a quincuncial screwdriver can be correspondingly adopted to realize the dismounting operation of the resonator 240.

In addition, it should be noted that the inner diameter of the second hole section is larger than the inner diameter of the first hole section, the second hole section is coaxially disposed with the first hole section, and the second hole section may be, for example, a circular hole or other shapes, and may be disposed according to actual requirements, which is not limited herein.

Referring to fig. 3, 6 and 9, in one embodiment, the resonator 240, the boss 213 and the adjusting screw 230 are coaxially disposed.

In one embodiment, the resonator 240 is a solid steel, free-cutting steel, 45 gauge steel, indium steel, aluminum, copper, or iron material. Specifically, the resonator 240 is, for example, free-cutting steel, easy to machine, and low in cost. Alternatively, the resonator 240 may also be made of other metal parts, which are not limited herein and may be set according to actual requirements. The material of the metal resonator 210 may be the same as or different from that of the resonator 240, and is not limited herein. Specifically, the material of the metal resonator 210 is usually aluminum.

Referring to fig. 3, 6 and 9, in one embodiment, the resonator 240 further includes a resonant disk 242. The resonant disk 242 is disposed around an end of the metal resonant rod 241 remote from the boss 213.

In one embodiment, there are two or more bosses 213, two or more resonators 240, two or more adjusting screws 230, and two or more adjusting screws 230 and two or more resonators 240 are disposed in one-to-one correspondence with the two or more bosses 213. Of course, as shown in fig. 3, the number of the bosses 213 in this embodiment may be only one, and the number of the resonators 240 and the number of the adjusting screws 230 are both one.

Referring to fig. 3, in one embodiment, the filter further includes a mounting member 250. The cover 220 is connected to the metal resonator 210 by a mounting member 250. Specifically, the mounting member 250 is, for example, a screw, a bolt, a pin, a rivet, or the like, and is not limited herein. The number of the mounting members 250 is, for example, one, two, three, four, etc., and is not limited herein, and may be set according to actual requirements.

Referring to fig. 3, 6 to 9, in an embodiment, a resonator 240 is configured to be mounted on a boss 213 of a bottom wall surface 211 of a metal resonant cavity 210, the boss 213 is provided with a recessed portion 2131, an inner wall surface of the recessed portion 2131 is provided with a first thread 2132, the resonator 240 includes a metal resonant rod 241, the metal resonant rod 241 is provided with a through hole 2411, the through hole 2411 extends from one end surface of the metal resonant rod 241 to the other end surface of the metal resonant rod 241, an outer wall of the metal resonant rod 241 is provided with a second thread 2412 adapted to the first thread 2132, the metal resonant rod 241 is mounted in the recessed portion 2131, and both the through hole 2411 and the recessed portion 2131 can avoid an adjusting screw 230 of the filter.

The resonator 240 is not fixed to the boss 213 by screws, but is inserted into the recess 2131 of the boss 213 through the outer wall, as in the conventional technology, so that on one hand, the assembly is convenient and fast, and on the other hand, the metal resonance rod 241 may be provided with the through hole 2411 in a hollow structure, so that the adjusting screw 230 can extend into the through hole 2411 and the recess 2131 during the position adjustment process of the cover 220, i.e., the position adjustment process of the adjusting screw 230 is not limited, and thus, the frequency adjustment range is wide. In addition, in the process of reducing the temperature drift of the filter by optimizing the height dimension h1 of the metal resonance rod 241 and the height dimension h2 of the boss 213, because the position of the adjusting screw 230 can not be limited by the resonator 240 and the boss 213 in the process of adjusting the vertical position, that is, the metal resonance rod 241 does not need to consider the distance between the metal resonance rod 241 and the top surface of the boss 213 in the process of reducing the height dimension h1 as in the traditional product, the height dimension h1 of the metal resonance rod 241 can be flexibly set according to the actual requirement, the adjustable range is large, the height dimension h2 of the boss 213 can also be flexibly set according to the actual requirement, the adjustable range is large, and the temperature drift of the product can be controlled to be within the preset range; furthermore, in order to reduce the temperature drift of the filter, the temperature drift of the filter can be controlled to be within a preset range by selecting iron materials with low cost instead of copper materials with high cost, so that the product cost can be reduced at the same time.

Referring to fig. 3, in one embodiment, a communication device includes a filter according to any of the above embodiments.

The communication device may be, for example, a duplexer, a combiner, or the like, or another communication device including a filter, and is not limited herein.

In the communication device, the resonator 240 is not fixed on the boss 213 by screws, but is inserted into the recess 2131 of the boss 213 through the outer wall in a screwing manner, as in the conventional technology, on one hand, the assembly is convenient and fast, and on the other hand, the metal resonance rod 241 can be provided with the through hole 2411 in a hollow structure, so that the adjusting screw 230 can extend into the through hole 2411 and the recess 2131 in the process of adjusting the position on the cover 220, i.e., the adjusting screw 230 is not limited in the process of adjusting the position up and down, thereby having a large frequency adjusting range. In addition, in the process of reducing the temperature drift of the filter by optimizing the height dimension h1 of the metal resonance rod 241 and the height dimension h2 of the boss 213, because the position of the adjusting screw 230 can not be limited by the resonator 240 and the boss 213 in the process of adjusting the vertical position, that is, the metal resonance rod 241 does not need to consider the distance between the metal resonance rod 241 and the top surface of the boss 213 in the process of reducing the height dimension h1 as in the traditional product, the height dimension h1 of the metal resonance rod 241 can be flexibly set according to the actual requirement, the adjustable range is large, the height dimension h2 of the boss 213 can also be flexibly set according to the actual requirement, the adjustable range is large, and the temperature drift of the product can be controlled to be within the preset range; furthermore, in order to reduce the temperature drift of the filter, the temperature drift of the filter can be controlled to be within a preset range by selecting iron materials with low cost instead of copper materials with high cost, so that the product cost can be reduced at the same time.

It should be noted that, in infringement comparison, the "boss 213" may be a "part of the metal resonator 210", that is, the "boss 213" is integrally formed with "other parts of the metal resonator 210"; the "boss 213" may be manufactured separately and then integrated with the "other portion of the metal resonator 210" as a single unit, which may be separate from the "other portion of the metal resonator 210". As shown in fig. 2 to 4, in one embodiment, the "boss 213" is a part of the "metal resonator 210" that is integrally formed.

It should be noted that, in infringement comparison, the "first segment 2413" may be a "part of the second segment 2414", i.e., "the first segment 2413" is integrally formed with "the other part of the second segment 2414"; the "first body segment 2413" may be manufactured separately from the "other portions of the second body segment 2414" and may be combined with the "other portions of the second body segment 2414" to form a single unit. As shown in fig. 3, 6, and 9, in one embodiment, the "first segment 2413" is a part of the "second segment 2414" that is integrally formed.

It should be noted that, in infringement comparison, the "resonant disk 242" may be a part of the "metal resonant rod 241", that is, the "resonant disk 242" is integrally formed with the "other part of the metal resonant rod 241"; the "resonant disk 242" may be manufactured separately from the "other portion of the metal resonant rod 241" and then combined with the "other portion of the metal resonant rod 241" into a single body. As shown in fig. 3, 6 and 9, in one embodiment, the "resonant disk 242" is a part of the "metal resonant rod 241" that is integrally formed.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A filter, characterized in that the filter comprises:

the metal resonant cavity is provided with a bottom wall surface and an opening opposite to the bottom wall surface, a boss is arranged on the bottom wall surface, a concave part is arranged on the boss, and first threads are arranged on the inner wall surface of the concave part;

the cover body is arranged on the opening in a covering manner, the adjusting screw is adjustably arranged on the cover body in position, and the adjusting screw extends into the metal resonant cavity; and

the resonator comprises a metal resonance rod, the metal resonance rod is provided with a through hole, the through hole extends from one end face of the metal resonance rod to the other end face of the metal resonance rod, a second thread matched with the first thread is arranged on the outer wall of the metal resonance rod, the metal resonance rod is arranged in the concave part, and the adjusting screw rod can extend into the through hole and the concave part in the process of adjusting the position on the cover body.

2. The filter of claim 1, wherein the metal resonating rod comprises a first component segment and a second component segment that are connected to each other; the second thread is wound on the outer wall of the first component section; the outer diameter of the first component section is smaller than that of the second component section, and one end face of the second component section close to the first component section is abutted against the table face of the boss.

3. The filter of claim 2, wherein the via comprises a first bore segment disposed on the first segment and a second bore segment disposed on the second segment, the first bore segment in communication with the second bore segment; the first hole section is a hexagonal hole, an octagonal hole, a quincuncial hole, a square hole, a triangular hole or an elliptical hole.

4. The filter of claim 2, wherein the resonator, the boss, and the adjusting screw are coaxially disposed.

5. The filter of claim 1, wherein the resonators are impervious steel, free-cutting steel, steel 45, indium steel, aluminum, copper, or iron.

6. The filter of claim 1, wherein the resonator further comprises a resonant disk disposed around an end of the metallic resonant rod distal from the boss.

7. The filter according to claim 1, wherein the number of the bosses is two or more, the number of the resonators is two or more, the number of the adjusting screws is two or more, and the two or more adjusting screws and the two or more resonators are provided in one-to-one correspondence with the two or more bosses.

8. The filter of claim 1, further comprising a mounting member, wherein the cover is coupled to the metal resonator via the mounting member.

9. The resonator is characterized in that the resonator comprises a metal resonance rod, the metal resonance rod is provided with a through hole, the through hole extends from one end face of the metal resonance rod to the other end face of the metal resonance rod, a second thread matched with the first thread is arranged on the outer wall of the metal resonance rod, the metal resonance rod is arranged in the concave part, and the through hole and the concave part can avoid an adjusting screw rod of a filter.

10. A communication device, characterized in that it comprises a filter according to any one of claims 1 to 8.