CN217691584U - Filter - Google Patents
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- CN217691584U CN217691584U CN202221097257.XU CN202221097257U CN217691584U CN 217691584 U CN217691584 U CN 217691584U CN 202221097257 U CN202221097257 U CN 202221097257U CN 217691584 U CN217691584 U CN 217691584U
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Abstract
The application discloses a filter, which relates to the technical field of communication and comprises a resonator component, wherein the resonator component comprises two resonator plates arranged at intervals; the coupling piece is arranged between the two resonance pieces, a plurality of coupling through holes are formed in the coupling piece, and the two resonance pieces are coupled through the coupling through holes. Therefore, because two resonance pieces are both flaky, the required volume is smaller, and the mutual coupling of the resonators on the two resonance pieces can be realized through the coupling hole on the coupling piece, at the moment, the distance between the two adjacent resonance pieces can be reduced, so that the volume between the whole filter is reduced, and compared with the traditional coaxial cavity filter, the filter of the embodiment of the application has smaller volume.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a filter.
Background
With the increasing demand for high performance and miniaturization of filters in communication devices in recent years, it is required to make the size of the filters smaller and smaller. In the traditional coaxial cavity filter, a plurality of columnar resonators need to be assembled in the cavity to realize a filtering function, and the traditional coaxial cavity filter is large in size and difficult to meet the use requirement of communication equipment.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving at least one of the problems in the prior art. Therefore, the filter is provided, and compared with the traditional coaxial cavity filter, the volume of the filter is smaller.
According to an embodiment of the present application, a filter is provided, the filter including:
the resonator assembly comprises two resonator plates arranged at intervals;
the coupling piece is arranged between the two resonance pieces, a plurality of coupling through holes are formed in the coupling piece, and the two resonance pieces are coupled through the coupling through holes.
According to the above embodiment of the present application, at least the following advantages are provided: because two resonance pieces are flaky, the required volume is small, and the mutual coupling of resonators on the two resonance pieces can be realized through the coupling hole on the coupling piece, at the moment, the distance between the two adjacent resonance pieces can be reduced, so that the volume between the whole filter is reduced, and compared with the traditional coaxial cavity filter, the filter of the embodiment of the application has smaller volume.
According to some embodiments of the first aspect of the present application, the filter further includes at least two first supporting frames, and the two first supporting frames are respectively located at two sides of the coupling plate and respectively abut against the resonance plate at a corresponding side.
According to some embodiments of the first aspect of the present application, the filter further comprises:
the number of the shielding cover plates is two, and the two shielding cover plates are respectively positioned on two sides of the resonator component;
the resonator component comprises two first supporting frames, the two first supporting frames are in one-to-one correspondence with the shielding cover plates, the two first supporting frames are abutted to one sides, close to the resonator component, of the corresponding shielding cover plates, and the two first supporting frames are used for separating the corresponding shielding cover plates from the resonator component.
According to some embodiments of the first aspect of the present application, the first support frame and the second support frame are both of a metal material and are configured to be grounded.
According to some embodiments of the first aspect of the present application, the linear expansion coefficient of the coupling plate is a preset multiple of the linear expansion coefficient of the resonator plate.
According to some embodiments of the first aspect of the present application, the preset multiple ranges from 1.5 to 4.
According to some embodiments of the first aspect of the present application, the resonant sheets are provided with a plurality of hollowed-out portions to form a plurality of resonators connected in series and spaced apart from each other, and the resonators on the two resonant sheets are coupled through the coupling through holes.
According to some embodiments of the first aspect of the present application, one side of the resonator plate is provided with a plurality of tuning vias in one-to-one correspondence with the resonators.
According to some embodiments of the first aspect of the present application, the resonator includes a first resonance section and a second resonance section, a width ratio of the first resonance section to the second resonance section ranges from 20 to 1, and a length ratio of the first resonance section to the second resonance section ranges from 20 to 0.2.
According to some embodiments of the first aspect of the present application, a plurality of the coupling vias are one or any combination of rectangular, circular, oval, L-shaped, T-shaped, and pi-shaped.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is an exploded view of a resonator plate and a coupling plate of a filter according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the partial A method shown in FIG. 1 according to an exemplary embodiment of the present application;
FIG. 3 is an exploded view of a filter according to an embodiment of the present application;
FIG. 4 is a schematic diagram of the structure of a filter in the embodiment of the present application;
fig. 5 is a schematic diagram of the effect of the filter in the embodiment of the present application.
Reference numerals:
A first support frame 310, a second support frame 320,
A shielding cover plate 400,
Tuning vias 510, input components 520, output components 530.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application. If any, the first and second are described only for the purpose of distinguishing technical features, and are not to be understood as indicating or indicating relative importance in time or implicitly indicating the number of indicated counting features or implicitly indicating the precedence of the indicated technical features.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
According to an embodiment of the present application, a filter is provided, which, as shown in fig. 1 to 4, includes:
the resonator assembly comprises two resonator plates 100 arranged at intervals;
the coupling sheet 200 is disposed between the two resonator plates 100, the coupling sheet 200 is provided with a plurality of coupling through holes, and the two resonator plates 100 are coupled through the coupling through holes.
Therefore, because the two resonator plates 100 are both in the shape of a plate, the required volume is small, and the resonators on the two resonator plates 100 can be coupled with each other through the coupling holes on the coupling plate 200, at this time, the distance between the two adjacent resonator plates 100 can be reduced, so that the volume between the whole filter is reduced, and compared with the conventional coaxial cavity filter, the filter of the embodiment of the application has a smaller volume.
It should be noted that at least one resonator is disposed on the resonator plates 100, and the coupling amount between two resonator plates 100 is determined by the size of the coupling through hole, so that the size of the entire filter can be reduced. In addition, the coupling through hole is disposed according to the coupling requirement of the resonator, and the shape of the coupling through hole may also be changed according to the requirement, which is not limited in the embodiments of the present application.
It should be noted that the coupling hole is formed by machining or punching, and the machining precision is within + -0.2 mm. The improvement of the precision of the coupling through hole can reduce the debugging workload of the filter, so that the manufacturing cost can be reduced.
It should be noted that, since the coupling plate 200 and the resonator plate 100 are both sheet-shaped, they can be fixed by welding or the like only after being stacked and aligned in the processing process. The processing mode is simpler, and the processing cost is lower.
It can be understood that, referring to the embodiment shown in fig. 1, the filter further includes at least two first supporting frames 310, and the two first supporting frames 310 are respectively located at two sides of the coupling plate 200 and respectively abut against the resonator plate 100 at the corresponding side.
It should be noted that the first supporting frame 310 is used to separate the resonator plate 100 and the coupling plate 200, and the shape of the frame makes the contact area between the coupling plate 200 and the resonator plate 100 wider and the assembly more convenient.
It can be understood that, referring to the embodiment shown in fig. 3, the filter further includes two shielding cover plates 400 and a second supporting frame 320, the two shielding cover plates 400 are respectively located at two sides of the resonator assembly; two second supporting frames 320 are arranged corresponding to the shielding cover plates 400 one by one, the second supporting frames 320 are abutted against one sides of the corresponding shielding cover plates 400 close to the resonator assemblies, and the second supporting frames 320 are used for separating the corresponding shielding cover plates 400 from the resonator assemblies.
It should be noted that the first supporting frame 310 and the second supporting frame 320 both support and can be fully contacted with the corresponding edge of the resonator plate 100, so as to improve the convenience of assembly and the stability of assembly.
It is understood that the first and second support frames 310 and 320 are both made of a metal material and are used for grounding. By providing the first and second support frames 310 and 320 as a metal material, loss thereof is lower with respect to an insulating material. The metal material may be selected from steel, aluminum, etc., and the embodiments of the present application are not limited thereto.
It can be understood that the linear expansion coefficient of the coupling plate 200 is a predetermined multiple of the linear expansion coefficient of the resonator plate 100.
It should be noted that the linear expansion coefficient of the resonator component is small, and the linear expansion coefficients of other components, such as the coupling piece 200, are large, so that the variation of the frequency response curve of the filter along with the temperature is minimized, and the temperature stability of the filter is improved. In particular, materials with large coefficients of linear expansion tend to increase in volume and shift the frequency response curve towards lower frequencies as temperature increases. The volume of the material with the small linear expansion coefficient is relatively small, so that the capacitance in the resonant cavity is reduced, the frequency response curve is shifted to high frequency, and similarly, the frequency response curve is also influenced when the temperature is reduced. Therefore, the temperature stability of the filter can be improved by the more appropriate configuration of the linear expansion coefficient.
It should be noted that, referring to the embodiment shown in fig. 3, when the first support frame 310, the second support frame 320 and the shielding cover 400 are provided, the linear expansion coefficients of the first support frame 310, the second support frame 320 and the shielding cover 400 are all made of a larger metal material and are all preset multiples of the linear expansion coefficient of the resonator plate 100.
It is understood that the predetermined multiple ranges from 1.5 to 4. By setting the linear expansion coefficient of the coupling plate 200 to be 1.5 times to 4 times that of the two resonator plates 100, the frequency response curve can be shifted to satisfy the preset error value.
Illustratively, the predetermined multiple is, for example, 1.5 times, further, the predetermined multiple is, for example, 4 times, and further, the predetermined multiple is, for example, 3 times.
It can be understood that, referring to the embodiment shown in fig. 1 and fig. 3, a plurality of hollowed-out portions are disposed on the resonator plates 100 to form a plurality of resonators that are connected in series and distributed at intervals, and the resonators on the two resonator plates 100 are coupled through the coupling through holes. Through setting up the fretwork portion for two resonance pieces 100 all are formed with continuous frame, and at this moment, the resonant cavity realizes establishing ties through switching on with the frame, realizes that the syntonizer on same resonance piece 100 establishes ties.
It should be noted that the number and the shape of the resonators may be set as needed, and the embodiments of the present application are not limited thereto.
It will be appreciated that, with reference to the embodiment shown in fig. 4, one side of the resonator plate 100 is provided with a plurality of tuning vias 510 in one-to-one correspondence with the resonators. It should be noted that each corresponding resonator can be tuned through the tuning via 510.
It should be noted that the tuning through hole 510 is processed after the filter is assembled and fixed, for example, the stacked filters are initially fixed by stamping, and then fixed by welding methods such as laser welding, argon arc welding, and brazing, and then processed. At this time, the filter of the embodiment of the present application can further satisfy the requirement of the tuning through-hole 510 without affecting the convenience of assembly.
It is understood that, referring to the embodiment shown in fig. 2, the resonator includes a first resonance part 171 and a second resonance part 172, the width ratio of the first resonance part 171 to the second resonance part 172 ranges from 20 to 1, and the length ratio of the first resonance part 171 to the second resonance part 172 ranges from 20 to 0.2.
Illustratively, the width ratio is 20, such as 1, such as 15, such as 5. The length ratio is 20, such as 10, such as 4, and such as 0.2.
Illustratively, referring to fig. 1 and 2, a racket-shaped resonator shown in fig. 2 is obtained by adjusting the width ratio and the length ratio of the first resonance part 171 and the second resonance part 172. The resonators are respectively a first resonator 110, a second resonator 120, a third resonator 130, a fourth resonator 140, a fifth resonator 150 and a sixth resonator 160, wherein the first resonator 110, the second resonator 120 and the third resonator 130 are located on the same resonator plate 100, and the fourth resonator 140, the fifth resonator 150 and the sixth resonator 160 are located on the same resonator plate 100. The corresponding coupling holes are respectively provided with 3, the 3 coupling holes are respectively a first coupling hole 210, a second coupling hole 220 and a third coupling hole 230, the larger the size of the first coupling hole 210 is, the larger the coupling amount between the third resonator 130 and the fourth resonator 140 is, the wider the filter channel bandwidth is, and vice versa. The second resonator 120 and the fifth resonator 150 are cross-coupled through the second coupling hole 220, and the larger the size of the second coupling hole 220 is, the larger the cross-coupling amount is, and at this time, the transmission zero A, B formed as shown in fig. 5 is closer to the passband, and vice versa. The first resonator 110 and the sixth resonator 160 are cross-coupled through the third coupling hole 230, and the larger the size of the third coupling hole 230 is, the larger the cross-coupling amount is, and the transmission zero C, D formed by the third coupling hole is closer to the passband as shown in fig. 5, and vice versa. Meanwhile, the coupling amount between two adjacent resonators is determined by the corresponding spacing distance, the closer the distance, the stronger the coupling amount is, the wider the filter passband is, and vice versa. Illustratively, the distance between first resonator 110 and second resonator 120 determines the amount of coupling between first resonator 110 and second resonator 120. In some embodiments, the first coupling hole 210 is an L-shaped hole. The second coupling hole 220 and the third coupling hole 230 are rectangular holes.
It is understood that the plurality of coupling vias are one or any combination of rectangular, circular, oval, L-shaped, T-shaped, and pi-shaped.
It should be noted that, after the filter is assembled, as shown in fig. 4, an input hole and an output hole may be opened on a side close to the resonator plate 100, the input component 520 is inserted into the input hole to transmit a signal to one of the resonators, and the output component 530 is inserted into the other resonator to output the signal.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application.
Claims (10)
1. A filter, comprising:
the resonator assembly comprises two resonator plates arranged at intervals;
the coupling piece is arranged between the two resonance pieces, a plurality of coupling through holes are formed in the coupling piece, and the two resonance pieces are coupled through the coupling through holes.
2. The filter of claim 1, further comprising:
the first supporting frames are arranged at least two and are respectively positioned on two sides of the coupling piece and respectively abutted against the resonance piece on one corresponding side.
3. The filter of claim 2, further comprising:
the number of the shielding cover plates is two, and the two shielding cover plates are respectively positioned on two sides of the resonator component;
the resonator component comprises two first supporting frames, the two first supporting frames are in one-to-one correspondence with the shielding cover plates, the two first supporting frames are abutted to one sides, close to the resonator component, of the corresponding shielding cover plates, and the two first supporting frames are used for separating the corresponding shielding cover plates from the resonator component.
4. The filter of claim 3,
the first supporting frame and the second supporting frame are made of metal materials and are used for being grounded.
5. The filter of claim 1,
and the linear expansion coefficient of the coupling plate is a preset multiple of the linear expansion coefficient of the resonance plate.
6. The filter of claim 5,
the range of the preset multiple is 1.5-4.
7. The filter according to any of claims 1 to 6,
the resonator plates are provided with a plurality of hollow parts to form a plurality of resonators which are connected in series and distributed at intervals, and the resonators on the two resonator plates are coupled through the coupling through holes.
8. The filter of claim 7,
and a plurality of tuning through holes which are in one-to-one correspondence with the resonators are arranged on one side of the resonance sheet.
9. The filter of claim 7,
the resonator comprises a first resonance part and a second resonance part, the width ratio of the first resonance part to the second resonance part ranges from 20 to 1, and the length ratio of the first resonance part to the second resonance part ranges from 20 to 0.2.
10. The filter according to any of claims 1 to 6,
the coupling through holes are in one or any combination of a rectangle shape, a circle shape, an oval shape, an L shape, a T shape and a pi shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221097257.XU CN217691584U (en) | 2022-05-07 | 2022-05-07 | Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221097257.XU CN217691584U (en) | 2022-05-07 | 2022-05-07 | Filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217691584U true CN217691584U (en) | 2022-10-28 |
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ID=83736221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221097257.XU Active CN217691584U (en) | 2022-05-07 | 2022-05-07 | Filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217691584U (en) |
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2022
- 2022-05-07 CN CN202221097257.XU patent/CN217691584U/en active Active
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