CN214625332U - Dielectric waveguide filter - Google Patents
Dielectric waveguide filter Download PDFInfo
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- CN214625332U CN214625332U CN202120511444.7U CN202120511444U CN214625332U CN 214625332 U CN214625332 U CN 214625332U CN 202120511444 U CN202120511444 U CN 202120511444U CN 214625332 U CN214625332 U CN 214625332U
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Abstract
The utility model provides a dielectric waveguide filter, which comprises a first dielectric body, a plurality of first dielectric resonators arranged on the first dielectric body, a second dielectric body and a plurality of second dielectric resonators arranged on the second dielectric body, the outer surfaces of the first dielectric body and the second dielectric body are conductive shielding layers, the outer surface of the first dielectric body comprises a top surface, a first side surface and a second side surface which are opposite, the second dielectric body is arranged on the top surface of the first dielectric body, each first dielectric resonator corresponds to one second dielectric resonator, a first coupling window for realizing energy coupling between the first dielectric resonator and the corresponding second dielectric resonator is arranged between the first dielectric resonator and the corresponding second dielectric resonator, the first coupling windows are arranged on the top surface of the first dielectric body, and at least one first coupling window extends to the first side surface or the second side surface of the first dielectric body. The utility model discloses can realize finely tuning dielectric waveguide filter's coupling and frequency.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a communication equipment device, concretely relates to dielectric waveguide filter.
[ background of the invention ]
The microwave filter and the duplexer are very important microwave passive devices in modern microwave and millimeter wave communication systems, the performance of the microwave filter and the duplexer directly affects the performance of the whole 5G communication system, and the demand of the microwave filter and the duplexer is increased along with the more mature 5G technology and the popularization of the technology.
Meanwhile, with the rapid development of mobile communication services and the increasing shortage of radio spectrum resources, higher and stricter requirements are put forward on the performance indexes of such passive devices. For example, microwave filters are miniaturized, lightweight, integrated and a series of key technologies. Therefore, the dielectric waveguide filter is one of the current 5G miniaturization research hotspots.
At present, an existing laminated dielectric waveguide filter generally includes two dielectric bodies which are stacked together from top to bottom, each dielectric body is provided with a plurality of dielectric resonators which are sequentially connected along the length direction of the dielectric body, the upper dielectric resonator and the lower dielectric resonator are generally coupled through a coupling window arranged on the top surface of the lower dielectric body, and because the coupling window is arranged on the top surface of the lower dielectric body, the coupling amount of the corresponding upper dielectric resonator and the corresponding lower dielectric resonator cannot be adjusted, so that the coupling and the frequency fine adjustment of the dielectric waveguide filter cannot be realized.
Accordingly, there is a need for an improved dielectric waveguide filter.
[ Utility model ] content
A primary object of the present invention is to provide a dielectric waveguide filter, which can be finely tuned with respect to the coupling and frequency of the dielectric waveguide filter.
In order to achieve the above object, the present invention provides a dielectric waveguide filter, comprising a first dielectric body, a plurality of first dielectric resonators disposed on the first dielectric body, a second dielectric body, and a plurality of second dielectric resonators disposed on the second dielectric body, the outer surfaces of the first dielectric body and the second dielectric body are conductive shielding layers, the outer surface of the first dielectric body comprises a top surface, a first side surface and a second side surface which are opposite, the second dielectric body is arranged on the top surface of the first dielectric body, each first dielectric resonator corresponds to one second dielectric resonator, a first coupling window for realizing energy coupling between the first dielectric resonator and the corresponding second dielectric resonator is arranged between the first dielectric resonator and the corresponding second dielectric resonator, the first coupling windows are arranged on the top surface of the first dielectric body, and at least one first coupling window extends to the first side surface or the second side surface of the first dielectric body.
As a preferred technical solution, the first coupling window includes a first non-conductive region disposed on the top surface of the first dielectric body and a conductive region disposed in the first non-conductive region, and the first non-conductive region and the conductive region of at least one first coupling window extend to the first side surface or the second side surface of the first dielectric body.
As a preferred technical solution, the outer surface of the second dielectric body includes a bottom surface, and the bottom surface of the second dielectric body is provided with a second non-conductive region at a position corresponding to the first non-conductive region.
As a preferable technical solution, the plurality of first dielectric resonators are sequentially connected along a length direction of the first dielectric body; and a second coupling window for realizing energy coupling between two adjacent first dielectric resonators is arranged between the two adjacent first dielectric resonators.
As a preferred technical solution, the outer surface of the first dielectric body comprises a top surface and a bottom surface; the number of the first dielectric resonators is three, in the three first dielectric resonators, a second coupling window between a first dielectric resonator and a second first dielectric resonator is a long-strip-shaped through hole penetrating through the top surface and the bottom surface of the first dielectric body, and a second coupling window between the second first dielectric resonator and a third first dielectric resonator comprises two first through holes penetrating through the top surface and the bottom surface of the first dielectric body.
As a preferred technical solution, a third non-conductive region is disposed on the top surface of the first dielectric body at a position between the two first through holes.
As a preferred technical solution, there are three second dielectric resonators, and the first coupling window between the first dielectric resonator and the corresponding first second dielectric resonator, and the first coupling window between the second first dielectric resonator and the corresponding second dielectric resonator extend to the first side surface of the first dielectric body.
As a preferable technical solution, the plurality of second dielectric resonators are sequentially connected along a length direction of the second dielectric body; and a third coupling window for realizing energy coupling between two adjacent second dielectric resonators is arranged between the two adjacent second dielectric resonators.
As a preferred technical solution, the outer surface of the second dielectric body includes a top surface and a bottom surface, and the third coupling window includes two second through holes penetrating through the top surface and the bottom surface of the second dielectric body.
As a preferred technical scheme, a coupling debugging blind hole is arranged between the two second through holes, and an open end of the coupling debugging blind hole is located on the top surface of the second dielectric body.
The utility model provides a dielectric waveguide filter, through having at least a first coupling window to extend to first side or the second side of first medium body, thereby can adjust the size of that part of the first side that extends to first medium body or the second side of first coupling window, thereby can realize adjusting the coupling volume between first dielectric resonator and the second dielectric resonator that corresponds, so just can realize finely tuning dielectric waveguide filter's coupling and frequency, make dielectric waveguide filter satisfy the performance index requirement, and the debugging degree of difficulty is low, and is with low costs.
[ description of the drawings ]
To further disclose the specific technical content of the present disclosure, please refer to the attached drawings, wherein:
fig. 1 is a schematic structural diagram of a dielectric waveguide filter according to an embodiment of the present invention;
figure 2 is a schematic top view of a first dielectric body of the dielectric waveguide filter of figure 1;
fig. 3 is a schematic front view of a first dielectric body of the dielectric waveguide filter of fig. 1.
Description of the symbols:
first dielectric body 10 first dielectric resonator 12
Elongated through-hole 14 of first tuning blind hole 122
First via 16 third non-conductive region 18
Second dielectric body 30 second dielectric resonator 32
Second tuning blind hole 322 second through hole 34
Coupling debugging blind hole 36
[ detailed description ] embodiments
Referring to fig. 1 to 3, the present embodiment provides a dielectric waveguide filter, which includes a first dielectric body 10, a plurality of first dielectric resonators 12 disposed on the first dielectric body 10, a second dielectric body 30, and a plurality of second dielectric resonators 32 disposed on the second dielectric body 30.
The outer surfaces of the first dielectric body 10 and the second dielectric body 30 are conductive shielding layers, and the conductive shielding layers are metal layers such as gold layers, silver layers, copper layers, tin layers, and the like. The outer surfaces of the first dielectric body 10 and the second dielectric body 30 include opposing top and bottom surfaces and opposing first and second side surfaces. A second dielectric body 30 is provided to the top surface of the first dielectric body 10. The plurality of first dielectric resonators 12 are connected in series along the longitudinal direction of the first dielectric member 10, and the plurality of second dielectric resonators 32 are connected in series along the longitudinal direction of the second dielectric member 30. One second dielectric resonator 32 corresponds to each first dielectric resonator 12. A first coupling window 50 for realizing energy coupling between each first dielectric resonator 12 and the corresponding second dielectric resonator 32 is arranged between the first dielectric resonators 12 and the corresponding second dielectric resonators 32, the first coupling windows 50 are arranged on the top surface of the first dielectric body 10, and at least one first coupling window 50 extends to the first side surface of the first dielectric body 10. The size of the part of the first coupling window 50 extending to the first side face of the first dielectric body 10 is adjusted, so that the coupling amount between the corresponding first dielectric resonator 12 and the second dielectric resonator 32 can be adjusted, the coupling and the frequency of the dielectric waveguide filter can be finely adjusted, the dielectric waveguide filter meets the performance index requirement, and meanwhile, the size of the part of the first coupling window 50 extending to the first side face of the first dielectric body 10 is adjusted, so that the debugging difficulty is reduced, and the cost is reduced.
The number of the first coupling windows 50 extending to the first side of the first dielectric body 10 may be set according to the coupling and frequency adjustment amount of the actual dielectric waveguide filter, and may be, for example, one, two or more, and the like.
Preferably, the first dielectric body 10 and the second dielectric body 30 are ceramic bodies. The second dielectric body 30 is provided to the top surface of the first dielectric body 10 by means of welding. The shapes of the first dielectric resonator 12 and the second dielectric resonator 32 are, for example, a square, a cylinder, a rectangle, etc., and may be partially unfilled corner shapes, which may be set according to actual situations.
In this embodiment, the first coupling window 50 includes a first non-conductive region 52 disposed on the top surface of the first dielectric body 10 and a conductive region 54 disposed within the first non-conductive region 52, and at least one of the first non-conductive region 52 and the conductive region 54 of the first coupling window 50 extends to the first side surface of the first dielectric body 10. By adjusting the size of the portion of the first non-conductive region 52 and/or the conductive region 54 that extends to the first side of the first dielectric body 10, the amount of coupling between the corresponding first dielectric resonator 12 and second dielectric resonator 32 can be adjusted, and thus the coupling and frequency tuning of the dielectric waveguide filter can be achieved.
In other embodiments, the at least one first coupling window 50 may also extend to the second side of the first dielectric body 10, i.e., the first non-conductive region 52 and the conductive region 54 of the at least one first coupling window 50 extend to the second side of the first dielectric body 10.
In this embodiment, there are three first dielectric resonators 12 and three second dielectric resonators 32. The first coupling window 50 between a first one of the first dielectric resonators 12 and a corresponding first one of the second dielectric resonators 32, and the first coupling window 50 between a second one of the first dielectric resonators 12 and a corresponding second one of the second dielectric resonators 32 extend to the first side of the first dielectric body 10. The first coupling window 50 between the third first dielectric resonator 12 and the corresponding third second dielectric resonator 32 does not extend to the first side of the first dielectric body 10.
The first non-conductive area 52 of the first coupling window 50 between the first dielectric resonator 12 and the corresponding first second dielectric resonator 32, the first non-conductive area 52 of the first coupling window 50 between the second first dielectric resonator 12 and the corresponding second dielectric resonator 32 are in a T-shaped frame structure, and the conductive area 54 is in a T-shape, so that the two first coupling windows 50 are both in a T-shaped structure, and the vertical part of the T-shaped structure extends to the first side surface of the first dielectric body 10.
The first non-conductive region 52 of the first coupling window 50 between the third first dielectric resonator 12 and the corresponding third second dielectric resonator 32 has a square frame-like structure, and the conductive region 54 has a square shape, so that the first coupling window 50 has a square structure.
In other embodiments, the shape of the first non-conductive region 52 may be, for example, a ring, a rectangular frame, or the like, and the shape of the conductive region 54 may be, for example, a circle, a rectangle, or the like, or a partially unfilled corner, so that the shape of the first coupling window 50 may be, for example, a circle, a rectangle, or the like, or a partially unfilled corner, and may be set according to actual circumstances.
The first coupling window 50 between the first dielectric resonator 12 and the corresponding first second dielectric resonator 32, and the first coupling window 50 between the second first dielectric resonator 12 and the corresponding second dielectric resonator 32 are arranged in such a manner that: the first non-conductive region 52 is formed by removing a portion of the conductive shielding layer on the top surface and the first side surface of the first dielectric body 10 by laser, grinding, etching, etc. according to the shape and size of the first non-conductive region 52, and the conductive shielding layer inside the first non-conductive region 52 forms the conductive region 54. The first coupling window 50 between the third first dielectric resonator 12 and the corresponding third second dielectric resonator 32 is arranged in such a way that: the first non-conductive region 52 is formed by removing a portion of the conductive shield layer on the top surface of the first dielectric body 10 by laser, grinding, etching, etc. in accordance with the shape and size of the first non-conductive region 52, the conductive shield layer inside the first non-conductive region 52 forming the conductive region 54. The mode of setting the first coupling window 50 has simple process, improves the yield and reduces the cost.
The bottom surface of the second dielectric body 30 is provided with second non-conductive regions at locations corresponding to the first non-conductive regions 52. The second non-conductive region is provided to prevent a short circuit between the corresponding first dielectric resonator 12 and second dielectric resonator 32. The second non-conductive area is arranged in the following way: the bottom surface of the second dielectric body 30 is subjected to laser, grinding, etching and other modes to remove a part of the conductive shielding layer according to the shape and the size of the second non-conductive area so as to form the second non-conductive area, so that the process is simple, the yield is improved, and the cost is reduced.
The first dielectric resonator 12 and the second first dielectric resonator 12 each have a first tuning blind hole 122, and as shown in fig. 2, the open end of the first tuning blind hole 122 is located on the top surface of the first dielectric body 10. The first tuning blind hole 122 is arranged to adjust the resonant frequency of the corresponding first dielectric resonator 12.
Each second dielectric resonator 32 has a second tuning blind hole 322. as shown in fig. 1, the open end of the second tuning blind hole 322 is located at the top surface of the second dielectric body 30. The second tuning blind hole 322 is arranged to adjust the resonant frequency of the corresponding second dielectric resonator 32.
The inner walls of the first tuning blind hole 122 and the second tuning blind hole 322 are provided with conductive shielding layers, and the material of the conductive shielding layers is the same as that of the conductive shielding layers of the first dielectric body 10 and the second dielectric body 30.
The cross-sectional shapes of first tuning blind hole 122 and second tuning blind hole 322 are, for example, tapered, circular, rectangular, etc. The setting can be carried out according to the actual situation.
Further, a second coupling window for realizing energy coupling between two adjacent first dielectric resonators 12 is arranged between the two adjacent first dielectric resonators.
In this embodiment, the second coupling window between the first dielectric resonator 12 and the second first dielectric resonator 12 is an elongated through hole 14 penetrating the top surface and the bottom surface of the first dielectric body 10, as shown in fig. 2. The second coupling window between the second first dielectric resonator 12 and the third first dielectric resonator 12 comprises two first through holes 16 penetrating the top and bottom surfaces of the first dielectric body 10 as shown in fig. 2. The first through holes 16 are arranged side by side and adjacent to the first side and the second side of the first dielectric body 10, respectively.
In other embodiments, the structures of the second coupling window between the first dielectric resonator 12 and the second first dielectric resonator 12, and the second coupling window between the second first dielectric resonator 12 and the third first dielectric resonator 12 may be the same.
Further, the top surface of the first dielectric body 10 is provided with a third non-conductive region 18 at a position between the two first through holes 16, as shown in fig. 2. The provision of the third non-conductive region 18 improves the flow of energy between the second first dielectric resonator 12 and the third first dielectric resonator 12.
The third non-conductive areas 18 are arranged in such a way that: the third non-conductive region 18 is formed by removing a portion of the conductive shielding layer on the top surface of the first dielectric body 10 by laser, grinding, etching, etc. in accordance with the shape and size of the third non-conductive region 18.
Further, a third coupling window for realizing energy coupling between two adjacent second dielectric resonators 32 is arranged between the two second dielectric resonators.
In this embodiment, the third coupling window includes two second vias 34 through the top and bottom surfaces of the second dielectric body 30, as shown in fig. 1. The two second through holes 34 are disposed side by side and adjacent to the first side and the second side of the second dielectric member 30, respectively.
A coupling debugging blind hole 36 is arranged between the two second through holes 34, and as shown in fig. 1, the open end of the coupling debugging blind hole 36 is located on the top surface of the second dielectric body 30. The setting of the coupling debugging blind hole 36 can realize the adjustment of the coupling amount between two adjacent second dielectric resonators 32.
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.
Claims (10)
1. A dielectric waveguide filter comprising a first dielectric body, a plurality of first dielectric resonators provided in the first dielectric body, a second dielectric body, and a plurality of second dielectric resonators provided in the second dielectric body, the outer surfaces of the first dielectric body and the second dielectric body are conductive shielding layers, the outer surface of the first dielectric body comprises a top surface, a first side surface and a second side surface which are opposite, the second dielectric body is arranged on the top surface of the first dielectric body, each first dielectric resonator corresponds to one second dielectric resonator, a first coupling window for realizing energy coupling between the first dielectric resonator and the corresponding second dielectric resonator is arranged between the first dielectric resonator and the corresponding second dielectric resonator, the first coupling windows are arranged on the top surface of the first dielectric body, and at least one first coupling window extends to the first side surface or the second side surface of the first dielectric body.
2. The dielectric waveguide filter of claim 1 wherein the first coupling windows include a first non-conductive region disposed on the top surface of the first dielectric body and a conductive region disposed within the first non-conductive region, the first non-conductive region and the conductive region of at least one first coupling window extending to the first side or the second side of the first dielectric body.
3. A dielectric waveguide filter according to claim 2 wherein the outer surface of the second dielectric body includes a bottom surface, the bottom surface of the second dielectric body being provided with a second non-conductive region at a position corresponding to the first non-conductive region.
4. A dielectric waveguide filter according to claim 1, wherein the plurality of first dielectric resonators are connected in series along a length direction of the first dielectric body; and a second coupling window for realizing energy coupling between two adjacent first dielectric resonators is arranged between the two adjacent first dielectric resonators.
5. A dielectric waveguide filter according to claim 4 wherein the outer surface of the first dielectric body comprises a top surface and a bottom surface; the number of the first dielectric resonators is three, in the three first dielectric resonators, a second coupling window between a first dielectric resonator and a second first dielectric resonator is a long-strip-shaped through hole penetrating through the top surface and the bottom surface of the first dielectric body, and a second coupling window between the second first dielectric resonator and a third first dielectric resonator comprises two first through holes penetrating through the top surface and the bottom surface of the first dielectric body.
6. A dielectric waveguide filter according to claim 5 wherein the top surface of the first dielectric body is provided with a third non-conductive region at a location between the two first vias.
7. A dielectric waveguide filter according to claim 5 wherein the number of second dielectric resonators is three, and the first coupling window between a first one of the first dielectric resonators and a corresponding first one of the second dielectric resonators, and the first coupling window between a second one of the first dielectric resonators and a corresponding second one of the second dielectric resonators extend to the first side of the first dielectric body.
8. A dielectric waveguide filter according to claim 1, wherein the plurality of second dielectric resonators are connected in series along a length direction of the second dielectric body; and a third coupling window for realizing energy coupling between two adjacent second dielectric resonators is arranged between the two adjacent second dielectric resonators.
9. A dielectric waveguide filter according to claim 8 wherein the outer surface of the second dielectric body comprises a top surface and a bottom surface and the third coupling window comprises two second vias through the top and bottom surfaces of the second dielectric body.
10. The dielectric waveguide filter of claim 9, wherein a coupling debugging blind hole is disposed between the two second through holes, and an open end of the coupling debugging blind hole is located on the top surface of the second dielectric body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120511444.7U CN214625332U (en) | 2021-03-11 | 2021-03-11 | Dielectric waveguide filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120511444.7U CN214625332U (en) | 2021-03-11 | 2021-03-11 | Dielectric waveguide filter |
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| Publication Number | Publication Date |
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| CN214625332U true CN214625332U (en) | 2021-11-05 |
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| CN202120511444.7U Active CN214625332U (en) | 2021-03-11 | 2021-03-11 | Dielectric waveguide filter |
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