CN212783717U - Low-frequency broadband filter and communication equipment - Google Patents
Low-frequency broadband filter and communication equipment Download PDFInfo
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- CN212783717U CN212783717U CN202021931047.7U CN202021931047U CN212783717U CN 212783717 U CN212783717 U CN 212783717U CN 202021931047 U CN202021931047 U CN 202021931047U CN 212783717 U CN212783717 U CN 212783717U
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Abstract
The embodiment of the utility model provides a low frequency broadband wave filter and communication equipment, make the coupling piece into integral structure, the cover welds on the temperature compensation step of syntonizer lower extreme, press in syntonizer below or the segmentation welding is on the mode of syntonizer than conventional coupling piece, it is more excellent in the aspect of the reliability, the solder joint can not produce the hidden danger because of the syntonizer when beating the screw, in the assembly of direction of height, the coupling piece can not increase the accumulative tolerance of direction of height, to the distance of control syntonizer quotation to the apron face, also there is not any influence, set up the turn-ups on the sub-coupling piece, through adjusting the width of sub-coupling piece and the coupling of turn-ups height and then regulation resonant cavity, in order to satisfy the index; the frequency can be realized by only controlling the height of the temperature compensation step, so that the processing difficulty of parts can be reduced, and the product frequency can be well realized.
Description
Technical Field
The embodiment of the utility model provides a relate to wave filter technical field, especially relate to a low frequency broadband wave filter and communication equipment.
Background
As a typical frequency selection device, a filter can effectively suppress an unwanted signal, and functions to select a signal, attenuate noise, filter interference, and the like. The cavity filter has the advantages of low cost and simple processing as a common filter.
In the existing cavity filter, in order to meet the frequency requirement, the precision of parts is required to be continuously improved, which directly results in the increase of the cost of the parts, and the coupling sheets connected between the resonators are usually pressed below the resonators, which results in poor consistency, and meanwhile, a part tolerance is increased in height, which has great influence on the frequency; although the scheme does not increase extra part tolerance, the problems of poor consistency and unreliable welding points exist in the production and assembly process, and particularly, the production manufacturability is poor due to the fact that the coupling pieces are welded among the couplers separately.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a low frequency broadband wave filter and communication equipment for solve among the prior art coupling piece assembling process uniformity poor, the processing degree of difficulty is big, the insecure problem of solder joint.
In a first aspect, an embodiment of the present invention provides a low-frequency broadband filter, including a cavity, a cover plate, and a plurality of resonators; one end of the cavity is an open end, the cover plate is arranged at the open end of the cavity, and the cover plate can be buckled with the open end; a plurality of resonant cavities are formed in the cavity, a boss is arranged in each resonant cavity, the resonators are respectively arranged in the resonant cavities and are connected with the bosses, and the resonant cavities are mutually coupled through a preset coupling window to form a filter coupling channel; the low-frequency broadband filter also comprises a coupling piece and a temperature compensation step, and the temperature compensation step is arranged between the resonator and the boss; the coupling piece is laid along the filter coupling channel, the coupling piece comprises a plurality of sub-coupling pieces which are connected in sequence, one sub-coupling piece is arranged between every two adjacent and coupled resonant cavities, and every two adjacent sub-coupling pieces are connected with the temperature compensation step in the same resonant cavity
Preferably, at least one of the sub-coupling sheets is provided with a flanging.
Preferably, the coupling piece is of an integrated structure, a first through hole is formed in the joint of the adjacent sub-coupling pieces, first through holes are formed in the head end and the tail end of the coupling piece, and the temperature compensation step is sleeved with the first through holes.
Preferably, the temperature compensation step is made of metal, and includes a first outer diameter section and a second outer diameter section, the bottom of the first outer diameter section is connected to the top of the second outer diameter section, the outer diameter of the first outer diameter section is smaller than the outer diameter of the second outer diameter section, a first step is formed at the joint of the first outer diameter section and the second outer diameter section, the first outer diameter section is matched with the first through hole, and the first through hole of the sub-coupling piece penetrates through the second outer diameter section and welds the coupling piece on the first step.
Preferably, the first steps of the plurality of temperature compensation steps are located at the same height.
Preferably, a second through hole is formed in the bottom of the resonator, a third through hole is formed in the temperature compensation step, a threaded hole is formed in the boss, and the second through hole, the third through hole and the threaded hole are coaxial; the resonator and the temperature compensation step are fixed on the boss through screws.
Preferably, the bottom of the temperature compensation step is a hollow sleeve, the boss comprises a third outer diameter section and a fourth outer diameter section, the bottom of the third outer diameter is connected with the top of the fourth outer diameter section, the outer diameter of the third outer diameter section is smaller than that of the fourth outer diameter section, a second step is formed at the joint of the third outer diameter section and the fourth outer diameter section, and the third outer diameter section is matched with the hollow sleeve.
Preferably, the sub-coupling piece is provided with two flanges, the flanges are bent upwards along two side edges of the sub-coupling piece, the width of the sub-coupling piece is adjustable, and the height and the length of the flanges are adjustable.
Preferably, a metal disc is arranged at the top of the resonator, and the area of the metal disc is larger than that of the surface of the upper end of the resonator; and a tuning screw is arranged at the corresponding position of the cover plate above the metal disc.
In a second aspect, an embodiment of the present invention provides a communication device, including a low frequency broadband filter as described in the first aspect of the present invention.
The embodiment of the utility model provides a low frequency broadband wave filter and communication equipment, make the coupling piece into integral structure, the cover welds on the temperature compensation step of syntonizer lower extreme, press in syntonizer below or the segmentation welding is on the mode of syntonizer than conventional coupling piece, it is more excellent in the aspect of the reliability, the solder joint can not produce the hidden danger because of the syntonizer when beating the screw, in the assembly of direction of height, the coupling piece can not increase the accumulative tolerance of direction of height, to the distance of control syntonizer quotation to the apron face, also there is not any influence, set up the turn-ups on the sub-coupling piece, through adjusting the width of sub-coupling piece and the coupling of turn-ups height and then regulation resonant cavity, in order to satisfy the index of; the frequency can be realized by only controlling the height of the temperature compensation step, so that the processing difficulty of parts can be reduced, and the product frequency can be well realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a perspective view of a low-frequency broadband filter according to the present invention;
fig. 2 is a schematic structural view of a coupling sheet according to an embodiment of the present invention;
fig. 3 is an exploded view of the top of a low frequency broadband filter in accordance with an embodiment of the present invention;
fig. 4 is a vertical cross-sectional view of a low frequency broadband filter according to an embodiment of the present invention;
fig. 5 is an enlarged view of a portion B of fig. 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the embodiment of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.
The terms "first" and "second" in the embodiments of the present application 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 application, the terms "comprise" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a system, product or apparatus that comprises a list of elements or components is not limited to only those elements or components but may alternatively include other elements or components not expressly listed or inherent to such product or apparatus. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those 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.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 existing cavity filter, in order to meet the frequency requirement, the precision of parts is required to be continuously improved, which directly results in the increase of the cost of the parts, and the coupling sheets connected between the resonators are usually pressed below the resonators, which results in poor consistency, and meanwhile, a part tolerance is increased in height, which has great influence on the frequency; although the scheme does not increase extra part tolerance, the problems of poor consistency and unreliable welding points exist in the production and assembly process, and particularly, the production manufacturability is poor due to the fact that the coupling pieces are welded among the couplers separately.
Therefore the embodiment of the utility model provides a low frequency broadband wave filter for solve among the prior art coupling piece assembly process uniformity poor, the processing degree of difficulty is big, the insecure problem of solder joint. The following description and description will proceed with reference being made to various embodiments.
The embodiment of the utility model provides a low frequency broadband filter, including cavity 4, apron 1 and a plurality of syntonizers 6; one end of the cavity 4 is an open end, the cover plate 1 is arranged at the open end of the cavity 4, and the cover plate 1 can be buckled with the open end; a plurality of resonant cavities 8 are formed in the cavity 4, a boss 7 is arranged in each resonant cavity 8, the plurality of resonators 6 are respectively arranged in the plurality of resonant cavities 8, the resonators 6 are connected with the bosses 7, and the plurality of resonant cavities 8 are mutually coupled through a preset coupling window to form a filter coupling channel; the resonator further comprises a coupling piece 3 and a temperature compensation step 13, wherein the temperature compensation step 13 is arranged between the resonator 6 and the boss 7; the coupling piece 3 is laid along the filter coupling channel, the coupling piece 3 comprises a plurality of sub-coupling pieces 8 which are connected in sequence, wherein one sub-coupling piece 8 is arranged between every two adjacent and coupled resonant cavities 8, every two adjacent sub-coupling pieces 8 are connected with the temperature compensation step 7 in the same resonant cavity 8, and at least one sub-coupling piece 8 is provided with a flanging 10.
Specifically, the resonator 6 is hollow, the resonator 6 and the temperature compensation step 13 are fixed on the boss 7 through screws, the boss 7 and the resonant cavity 8 are integrated, the cavity 4 is isolated into a plurality of resonant cavities 8 through the arrangement of ridges in the cavity 4, the adjacent resonant cavities 8 are mutually coupled through a preset coupling window, the plurality of resonant cavities 8 are mutually coupled to form a filter coupling channel, and the head resonant cavity 8 and the tail resonant cavity 8 in the filter coupling channel are respectively connected with an input end and an output end; the side wall of the cavity 4 and the top of the ridge are provided with a plurality of threaded holes, through holes and screws are arranged at positions, corresponding to the threaded holes, on the cover plate 1, and meanwhile, tuning screw mounting holes are also arranged on the cover plate 1 and are coaxial with the resonator 6 and the boss 7.
Specifically, coupling piece 3 is when laying along wave filter coupling passageway, in order to solve the big, unreliable problem of solder joint of the processing degree of difficulty among the prior art, the embodiment of the utility model provides a through establishing coupling piece 3 corresponding position cover and welding in corresponding resonant cavity 8 on the warm step 13 of mending, warm step 13 is fixed in on the boss 7, in order to realize this purpose, sets up coupling piece 3 into the mode that a plurality of heads and tails connect gradually, connects gradually through a plurality of sub-coupling pieces 8 heads and tails, wherein the one end common cover of every two adjacent sub-coupling pieces 8 is established and is welded in same warm step 13, when not enough to the coupling quantity of the coupling window of two adjacent resonant cavities 8, through set up turn-ups 10 on the sub-coupling piece 8 that corresponds, and then increase the coupling quantity.
Specifically, as shown in fig. 1, the cavity 4 is isolated into two filter coupling channels, and therefore, the corresponding coupling pieces 3 also include two pieces, which are respectively laid along the filter coupling channels; the embodiment of the utility model provides a make the integrated structure with coupling piece 3, the cover is in weld on warm-up step 13, compare conventional coupling piece 3 and press in the mode of syntonizer below or segmentation welding at the syntonizer, it is more excellent in the aspect of the reliability, the solder joint can not produce the hidden danger because of the syntonizer when beating the screw, in the assembly of direction of height, coupling piece 3 can not increase the accumulative tolerance of direction of height, to the distance of 6 quotations of control syntonizers to apron 1 face, also there is not any influence, set up turn-ups 10 on sub-coupling piece 8, through adjusting the width of sub-coupling piece 8 and the height of turn-ups 10 and then adjust the coupling of resonant cavity 8, in order to satisfy the index of bandwidth; the frequency can be realized by only controlling the height of the installation surface of the temperature compensation step 13 and the height of the resonator 6, so that the processing difficulty of parts can be reduced, and the product frequency can be well realized.
In one embodiment, the coupling plate 3 is an integrated structure, a first through hole 11 is formed at a joint between adjacent sub-coupling plates 8, first through holes 11 are formed at the head end and the tail end of the coupling plate 3, and the first through hole 11 is sleeved on the temperature compensation step 13.
Specifically, in this embodiment, the coupling sheet 3 is integrated, the joint of the adjacent sub-coupling sheets 8 is provided with a first through hole 11, the head end and the tail end of the coupling sheet 3 are also provided with a first through hole 11, the first through hole 11 is matched with the temperature compensation step 13, the first through hole 11 is sleeved on the temperature compensation step 13 at the corresponding position and welded, the temperature compensation step 13 is connected with the sub-coupling sheets 8 at two sides, one sub-coupling sheet 8 is fixed between the two adjacent and coupled resonant cavities 8, so as to lay the whole integrated coupling sheet 3 along the coupling channel of the filter, the coupling sheet 3 is not required to be separately arranged between each resonant cavity 8, the coupling sheet 3 between each resonant cavity 8 in the whole filter can be arranged at one time, only further welding and fixing are required, compared with the conventional coupling sheet 3, the coupling sheet 3 is pressed below the resonator or welded on the resonator in a segmented manner, the reliability is better, hidden danger can not be produced when the welding spot is screwed because of the resonator, and in the assembly of the height direction, the coupling sheet 3 can not increase the accumulated tolerance of the height direction, and has no influence on the distance from the disc surface of the control resonator 6 to the surface of the cover plate 1.
In one embodiment, the boss 7 is sleeved with the temperature compensation step 13, the lower end of the temperature compensation step 13 is a hollow sleeve, and the hollow sleeve is matched with the boss 7; the temperature compensation step 13 comprises a first outer diameter section 14 and a second outer diameter section, the bottom of the first outer diameter section 14 is connected with the top of the second outer diameter section, the outer diameter of the first outer diameter section 14 is smaller than that of the second outer diameter section, a first step is formed at the joint of the first outer diameter section 14 and the second outer diameter section, the first outer diameter section is matched with the first through hole 11, and the sub-coupling piece 8 is welded on the first step through the first through hole 11.
Specifically, as an embodiment, a circle is turned off at the top of the outside of the temperature compensation step 13, so that the stepped metal sleeve 13 forms a first outer diameter section 14 (a small outer diameter section) and a second outer diameter section (a large outer diameter section, namely, an original steel sleeve), a first step for accommodating the coupling piece 3 is formed between the first outer diameter section 14 and the second outer diameter section, the first outer diameter section is arranged and located in the first through hole 11 to be matched, the first through hole 11 is sleeved on the first outer diameter section 14, and the first step is placed to be welded and fixed, so that the whole coupling piece 3 is welded and fixed. Wherein, the first steps in each resonant cavity are positioned at the same height.
Specifically, the bottom of the resonator 6 is fixed on the temperature compensation step 13 through a screw, so that a second through hole is correspondingly formed in the bottom of the resonator 6, the second through hole is formed in the top of the temperature compensation step 13, a threaded hole is formed in the boss 7, and the resonator 6 and the temperature compensation step 13 are fixed on the boss 7 through screws.
In one embodiment, the boss 7 includes a third outer diameter section 15 and a fourth outer diameter section (original boss), the bottom of the third outer diameter section 15 is connected with the top of the fourth outer diameter section, the outer diameter of the third outer diameter section 15 is smaller than that of the fourth outer diameter section, a second step is formed at the connection position of the third outer diameter section 15 and the fourth outer diameter section, and the third outer diameter section 15 is matched with the hollow sleeve.
Specifically, in order not to increase the tolerance in the width direction, the top of the boss 7 is also turned off by one turn, so that the boss 7 forms a third outer diameter section 15 (small outer diameter section) and a fourth outer diameter section (large outer diameter section, i.e., the outer diameter of the original boss 7), wherein the third outer diameter section 15 matches with the hollow sleeve in the above embodiment.
In one embodiment, two flanges 10 are disposed on the sub-coupling piece 8, the flanges 10 are bent upward along two side edges of the sub-coupling piece 8, the width of the sub-coupling piece 8 is adjustable, and the height of the flanges 10 is adjustable.
In one embodiment, a metal disk is arranged on the top of the resonator 6, and the area of the metal disk is larger than that of the upper end surface of the resonator 6; and a tuning screw is arranged at the corresponding position of the cover plate 1 above the metal disc.
Specifically, the top end of the resonator 6 is provided with the metal disc, that is, the resonator 6 and the metal disc form the resonator 2 in the embodiment, at this time, the resonance capacitance of the resonator 2 is the capacitance between the cover plate 1 (metal) and the metal disc, and the capacitance at the end of the traditional dielectric resonator is large, so that the resonance frequency of the resonator is reduced, the overall dimension of the filter is reduced, and the resonance frequency can be adjusted by adjusting the adjusting screw rod on the cover plate 1.
The utility model also provides a communication equipment, include like the utility model discloses above-mentioned each embodiment low frequency broadband wave filter.
To sum up, the embodiment of the utility model provides a low frequency broadband wave filter and communication equipment, make the coupling piece into integrated structure, the cover welds on the temperature compensation step of syntonizer or syntonizer lower extreme, press in syntonizer below or the segmentation welding on the mode of syntonizer than conventional coupling piece, the reliability is more excellent, the solder joint can not produce the hidden danger because of the syntonizer when beating the screw, in the assembly of direction of height, the coupling piece can not increase the accumulative tolerance of direction of height, to the control syntonizer quotation to the distance of apron face, also there is not any influence, set up the turn-ups on the sub-coupling piece, through the width of adjustment sub-coupling piece and turn-ups height and then adjust the coupling of resonant cavity, in order to satisfy the index of bandwidth; the frequency can be realized by only controlling the height of the mounting surface of the boss of the resonant cavity and the height of the resonator, so that the processing difficulty of parts can be reduced, and the product frequency can be well realized.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A low-frequency broadband filter comprises a cavity, a cover plate and a plurality of resonators; one end of the cavity is an open end, the cover plate is arranged at the open end of the cavity, and the cover plate can be buckled with the open end; the low-frequency broadband filter is characterized by further comprising a coupling sheet and a temperature compensation step, wherein the temperature compensation step is arranged between the resonator and the boss; the coupling piece is laid along the filter coupling channel, the coupling piece comprises a plurality of sub-coupling pieces which are connected in sequence, one sub-coupling piece is arranged between every two adjacent and coupled resonant cavities, and every two adjacent sub-coupling pieces are connected with the temperature compensation step in the same resonant cavity.
2. The low frequency broadband filter of claim 1, wherein at least one of the sub-coupling plates is provided with a flange.
3. The low-frequency broadband filter according to claim 1, wherein the coupling plate is an integrated structure, a first through hole is formed at a joint of adjacent sub-coupling plates, first through holes are formed at the head end and the tail end of the coupling plate, and the first through holes are sleeved on the temperature compensation step.
4. The low-frequency broadband filter according to claim 3, wherein the temperature compensation step is a temperature compensation step made of a metal material, the temperature compensation step includes a first outer diameter section and a second outer diameter section, the bottom of the first outer diameter section is connected to the top of the second outer diameter section, the outer diameter of the first outer diameter section is smaller than the outer diameter of the second outer diameter section, a first step is formed at the joint of the first outer diameter section and the second outer diameter section, the first outer diameter section is matched with the first through hole, and the first through hole of the sub-coupling piece penetrates through the second outer diameter section and welds the coupling piece on the first step.
5. The low frequency broadband filter of claim 4, wherein the first step of the plurality of temperature compensated steps is at a same height, and the height of the first step is adjustable.
6. The low-frequency broadband filter according to claim 1, wherein a second through hole is formed in the bottom of the resonator, a third through hole is formed in the temperature compensation step, a threaded hole is formed in the boss, and the second through hole, the third through hole and the threaded hole are coaxial; the resonator and the temperature compensation step are fixed on the boss through screws.
7. The low frequency broadband filter of claim 1, wherein the bottom of the temperature compensation step is a hollow sleeve, the boss comprises a third outer diameter section and a fourth outer diameter section, the bottom of the third outer diameter section is connected with the top of the fourth outer diameter section, the outer diameter of the third outer diameter section is smaller than that of the fourth outer diameter section, a second step is formed at the joint of the third outer diameter section and the fourth outer diameter section, and the third outer diameter section is matched with the hollow sleeve.
8. The low-frequency broadband filter of claim 2, wherein two flanges are arranged on the sub-coupling sheet, the flanges are bent upwards along two side edges of the sub-coupling sheet, the width of the sub-coupling sheet is adjustable, and the height and the length of the flanges are adjustable.
9. The low frequency broadband filter of claim 1, wherein the resonator is provided with a metal disc on top, the metal disc having an area larger than the resonator upper end surface area; and a tuning screw is arranged at the corresponding position of the cover plate above the metal disc.
10. A communication device comprising a low frequency broadband filter according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021931047.7U CN212783717U (en) | 2020-09-07 | 2020-09-07 | Low-frequency broadband filter and communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021931047.7U CN212783717U (en) | 2020-09-07 | 2020-09-07 | Low-frequency broadband filter and communication equipment |
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| CN212783717U true CN212783717U (en) | 2021-03-23 |
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| CN202021931047.7U Active CN212783717U (en) | 2020-09-07 | 2020-09-07 | Low-frequency broadband filter and communication equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113285191A (en) * | 2021-04-20 | 2021-08-20 | 武汉德威斯电子技术有限公司 | Filter convenient for coupling, coupling method thereof and communication equipment |
| CN115101913A (en) * | 2022-07-25 | 2022-09-23 | 河北优圣通信科技有限公司 | Direct current coupler |
-
2020
- 2020-09-07 CN CN202021931047.7U patent/CN212783717U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113285191A (en) * | 2021-04-20 | 2021-08-20 | 武汉德威斯电子技术有限公司 | Filter convenient for coupling, coupling method thereof and communication equipment |
| CN115101913A (en) * | 2022-07-25 | 2022-09-23 | 河北优圣通信科技有限公司 | Direct current coupler |
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