CN210111005U - Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station - Google Patents
Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station Download PDFInfo
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- CN210111005U CN210111005U CN201921066797.XU CN201921066797U CN210111005U CN 210111005 U CN210111005 U CN 210111005U CN 201921066797 U CN201921066797 U CN 201921066797U CN 210111005 U CN210111005 U CN 210111005U
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Abstract
The utility model relates to a wave filter technical field specifically is a dielectric waveguide filter, radio frequency module and basic station of harmonic performance improve, dielectric waveguide filter includes that dielectric body and two at least resonance portions that are located different dielectric bodies are in the same place through the coupling window coupling between the resonance portion, the coupling window sets up the border at the dielectric body. The coupling window is a coupling window of main path coupling or a coupling window of cross coupling. The coupling windows are strip-shaped, L-shaped or Contraband-shaped and are symmetrically distributed along the central axis of the dielectric body. The utility model provides a pair of improve dielectric waveguide filter, radio frequency module and basic station of harmonic performance can let the harmonic keep away from the wave filter passband, reduces the loss and the manufacturing process complexity of wave filter, reduce cost.
Description
Technical Field
The utility model relates to a wave filter technical field specifically is a improve dielectric waveguide filter, radio frequency module and basic station of harmonic performance.
Background
Compared with the traditional metal cavity waveguide filter, the dielectric waveguide filter has the advantages of small size, small insertion loss, large bearing power, low cost and the like, and can meet the requirements of a 5G communication system on the filter.
In the dielectric waveguide filter, not only the cavity itself can generate higher-order mode harmonics, but also the coupling structure can generate resonance. In particular, in a broadband laminated waveguide filter, harmonics generated by the coupling structure are often closer to the passband of the filter than higher-order mode harmonics of the cavity itself. The harmonics of the coupling structure can have a significant impact on the overall performance of the filter, which presents significant challenges to the design of the low pass filter.
SUMMERY OF THE UTILITY MODEL
The utility model provides an improve dielectric waveguide filter, radio frequency module and basic station of harmonic performance can let the harmonic keep away from the wave filter passband, reduces the loss and the manufacturing process complexity of wave filter, reduce cost.
In order to solve the technical problem, the present application provides the following technical solutions:
a dielectric waveguide filter for improving harmonic performance comprises a dielectric body and at least two resonance parts located on different dielectric bodies, wherein the resonance parts are coupled together through a coupling window, and the coupling window is arranged on the edge of the dielectric body.
In the technical scheme of the utility model, the coupling window is arranged at the edge of the dielectric body, because the electric field in the middle of the dielectric body is very strong, the electric field is weaker toward the edge, the magnetic field strength of the edge is stronger, the magnetic field is weaker toward the center, the coupling window is arranged at the edge of the dielectric body, the electric field distribution is very small, the electric coupling is very weak, the main coupling is magnetic coupling, the arrangement can lead the harmonic wave brought by the coupling window to be more far away from the passband of the filter, the pressure of the low-pass filter used by the system is reduced, and the overall performance is improved; the filter coupled with the structure can reduce the number of levels and zeros of the low-pass filter, reduce the loss of the whole filter and the complexity of the manufacturing process under the requirement of the same far-end inhibition, thereby saving the cost.
Further, the coupling window is a coupling window for main path coupling or a coupling window for cross coupling.
Further, the dielectric body comprises a first body and a second body, the first body comprises a sixth resonance part, a first resonance part and a second resonance part which are sequentially arranged, and the second body comprises a fifth resonance part, a fourth resonance part and a third resonance part which are arranged corresponding to the resonance parts on the first body;
the coupling windows include a first coupling window provided on a surface of the first resonance part and a surface of the fourth resonance part, a second coupling window provided on a surface of the second resonance part and a surface of the third resonance part, and a third coupling window provided on a surface of the fifth resonance part and a surface of the sixth resonance part, the second coupling window and the third coupling window being main path coupling windows.
The second coupling window and the third coupling window are main path coupling windows, and the coupling windows are arranged on the edge of the dielectric body, so that the main path coupling is magnetic coupling, the harmonic waves brought by the coupling windows can be far away from the passband of the filter, and the performance of the filter is improved.
Further, the first coupling window is a cross-coupling window, and the first coupling window is disposed at an intermediate position of the surfaces of the first resonance section and the fourth resonance section. The cross-coupling is made electrically coupled by placing the cross-coupling window position at an intermediate position of the resonator surface.
Further, the first body is arranged on the surface of the first resonance part, the second body is arranged on the surface of the second resonance part, the first body is arranged on the surface of the second resonance part, the second body is arranged on the surface of the third resonance part, and the second body is arranged on the surface of the second resonance part. Cross-coupling windows are also provided at the edges so that the cross-coupling is also magnetic coupling.
Further, an input interface and an output interface are arranged on the medium body, the input interface is arranged on the first resonance part, and the output interface is arranged on the sixth resonance part. The resonance part where the input interface is located and the resonance part where the output interface is located are arranged on the same medium body, so that the installation is convenient, and the system miniaturization and the system integration are facilitated.
Further, the coupling window is bar-shaped, L-shaped or Contraband-shaped.
Furthermore, the coupling windows are symmetrically distributed along the central axis of the dielectric body.
Further, the application also discloses a radio frequency module comprising the filter for improving the harmonic performance.
Due to the adoption of the dielectric waveguide filter, the harmonic wave can be further far away from the passband of the filter, the harmonic wave performance is improved, and the cost is reduced.
Further, the application also discloses a base station, which comprises the radio frequency module.
Due to the adoption of the radio frequency module, the harmonic performance can be improved, and the production cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of a dielectric waveguide filter for improving harmonic performance according to the present invention;
fig. 2 is a schematic structural diagram of a second coupling window in a first embodiment of a dielectric waveguide filter for improving harmonic performance according to the present invention;
fig. 3 is a schematic structural diagram of a third coupling window in the first embodiment of the dielectric waveguide filter according to the present invention for improving harmonic performance;
fig. 4 is a schematic diagram of the electric field intensity distribution of the dielectric body in the embodiment of the dielectric waveguide filter for improving the harmonic performance according to the present invention;
fig. 5 is a schematic diagram illustrating the magnetic field intensity distribution of the dielectric body in an embodiment of a dielectric waveguide filter for improving harmonic performance according to the present invention;
fig. 6 is a simulation graph of a dielectric waveguide filter with improved harmonic performance according to the present invention.
FIG. 7 is a graph of a simulation of a prior art filter;
fig. 8 is a schematic structural diagram of a second coupling window in a third embodiment of a dielectric waveguide filter according to the present invention for improving harmonic performance;
fig. 9 is a schematic structural diagram of a second coupling window in a fourth embodiment of a dielectric waveguide filter according to the present invention for improving harmonic performance;
fig. 10 is a schematic structural diagram of a second coupling window in a fifth embodiment of a dielectric waveguide filter according to the present invention for improving harmonic performance;
fig. 11 is a schematic structural diagram of a second coupling window in a sixth embodiment of a dielectric waveguide filter with improved harmonic performance according to the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
the reference numbers in the drawings of the specification include: the resonator comprises a dielectric body 1, a coupling window 2, a first body 3, a second body 4, a first resonance part 5, a second resonance part 6, a third resonance part 7, a fourth resonance part 8, a fifth resonance part 9, a sixth resonance part 10, a fourth coupling window 11, a through hole 12 and a first coupling window 13.
Example one
As shown in fig. 1, a dielectric waveguide filter for improving harmonic performance includes a plurality of dielectric bodies 1 combined together, a conductive layer is covered on the surface of the dielectric body 1, the dielectric body 1 includes a plurality of resonance portions arranged, a coupling window 2, an input interface and an output interface are arranged on the dielectric body 1, the position of the coupling window 2 has no conductive layer, the input interface and the output interface are arranged on different resonance portions of the same dielectric body 1, at least one isolation portion is arranged between the resonance portion where the input interface is located and the resonance portion where the output interface is located, and the isolation portion makes the coupling bandwidth between the two resonance portions connected by the isolation portion smaller than 10% of the working bandwidth of the dielectric waveguide filter using the dielectric body 1. The body is provided with through holes 12 at the joints of different resonance parts, and the surface of the resonance part is provided with blind holes.
In this embodiment, the dielectric body 1 is made of a ceramic material, the dielectric body 1 includes a first body 3 and a second body 4, a silver layer is used as a conductive layer, the first body 3 includes a second resonance portion 6, a first resonance portion 5 and a sixth resonance portion 10, which are sequentially arranged, an input interface is arranged at the first resonance portion 5, an output interface is arranged at the sixth resonance portion 10, an isolation portion is arranged at a middle position of a connection between the first resonance portion 5 and the sixth resonance portion 10, the isolation portion is a strip-shaped through hole 12, and a pair of through holes 12 is arranged at a connection between the first resonance portion 5 and the second resonance portion 6.
The second body 4 includes a third resonance part 7, a fourth resonance part 8, and a fifth resonance part 9. A pair of through holes 12 are provided at the junction of the third resonance part 7 and the fourth resonance part 8 and at the junction of the fourth resonance part 8 and the fifth resonance part 9, and in this embodiment, the through holes 12 are preferably elliptical.
The coupling window 2 includes a first coupling window 13, a second coupling window, a third coupling window and a fourth coupling window 11, the first coupling window 13 being disposed at a surface of the first resonance part 5 and a surface of the fourth resonance part 8; the second coupling window is provided on the surface of the second resonance section 6 and the surface of the third resonance section 7; the third coupling window is provided on the surface of the fifth resonance part 9 and the surface of the sixth resonance part 10; the fourth coupling window 11 is provided on the surface of the first body 3 at the junction of the first resonance part 5 and the second resonance part 6 and on the surface of the second body 4 at the junction of the third resonance part 7 and the fourth resonance part 8.
Main path coupling is provided between second resonator 6 and third resonator 7, and between fifth resonator 9 and sixth resonator 10, main path coupling is provided between first resonator 5 and second resonator 6, and cross coupling is provided between fourth resonator 8 and first resonator 5, that is, first coupling window 13 is a cross coupling window, and second coupling window and third coupling window are main path coupling windows. The fourth coupling window 11 is a cross-coupling window. The cross-coupled coupling window 2 and the main-path coupled coupling window 2 are both arranged on the edge of the dielectric body 1 where the resonance part is located, so that the main-path coupling and the cross-coupling are magnetic coupling, the harmonic waves brought by the coupling window 2 can be far away from the passband of the filter, and the performance of the filter is improved. The first coupling window 13 is provided at a position intermediate the surfaces of the first resonance part 5 and the fourth resonance part 8. In the present embodiment, the first coupling window 13 is the square coupling window 2, and the cross-coupling is made to be electrically coupled by setting the cross-coupling window position at the middle position of the resonance portion surface.
The coupling windows 2 of the main path coupling and the cross coupling may be bar-shaped, L-shaped, or Contraband-shaped. In the present embodiment, two strip-shaped coupling windows 2 are opened on the overlapping surface of the second resonance part 6 and the third resonance part 7, and as shown in fig. 2, the two strip-shaped coupling windows 2 are disposed at the two edges of the overlapping surface. As shown in fig. 3, in addition to two strip-shaped windows provided at both side edges of the overlapping surface, one strip-shaped window is provided at the edge of the fifth resonance part 9 and the edge of the sixth resonance part 10 near the end, i.e., three windows are provided in total between the fifth resonance part 9 and the sixth resonance part 10, between the fifth resonance part 9 and the sixth resonance part 10. A pair of corresponding coupling windows 2 are arranged between the first resonance part 5 and the second resonance part 6 and between the third resonance part 7 and the fourth resonance part 8, the coupling windows 2 also adopt the arrangement mode of two strip-shaped windows, and the elliptical through holes 12 for isolating the resonant cavities are arranged in front of the first resonance part 5 and the second resonance part 6 and in front of the third resonance part 7 and the fourth resonance part 8, so that the coupling windows 2 are arranged at the edges close to the through holes 12.
The coupling window 2 is arranged at the edge of the dielectric body 1, as shown in fig. 4 and 5, the electric field in the middle of the dielectric body 1 is very strong, the electric field towards the edge is weaker, the magnetic field at the edge is strong, the magnetic field towards the center is weaker, the coupling window 2 is arranged at the edge of the ceramic block, the coupling window 2 can be arranged at the strongest position of the magnetic field, the electric field distribution at the position is very small, the electric coupling is very weak, the main coupling is magnetic coupling, the arrangement can enable the harmonic wave brought by the coupling window 2 to be far away from the passband of the filter, the pressure on the low-pass filter used by the system is reduced, and the overall performance is improved. Fig. 6 is a simulation graph of a conventional filter using electric coupling as main path coupling, and a simulation result of the dielectric waveguide filter with improved harmonic performance of this embodiment is shown in fig. 7, and it can be seen that, by the design of this embodiment, the harmonic is pushed from 4320MHz-4419MHz to 4885MHz-4947MHz, so that the harmonic of the filter can be far away from the pass band of the filter, and for the filter with the same far-end rejection requirement, the number of stages and zeros of the low-pass filter can be reduced, and the loss and the complexity of the manufacturing process of the entire filter can be reduced, thereby saving the cost.
The embodiment also discloses a radio frequency module, which comprises the dielectric waveguide filter for improving the harmonic performance, and the dielectric waveguide filter can be used for filtering signals when the radio frequency module receives and transmits data signals.
The embodiment also discloses a base station, which comprises the radio frequency module and is used for receiving and transmitting data signals.
Example two
The difference between this embodiment and the first embodiment is that, in this embodiment, the coupling windows 2 are symmetrically distributed along the central axis of the dielectric body 1.
EXAMPLE III
As shown in fig. 8, the difference between this embodiment and the first embodiment is that the coupling window 2 for main path coupling and/or the coupling window 2 for cross coupling only includes one strip-shaped coupling window 2 located at the edge of the dielectric body 1.
Specifically, in this embodiment, the second coupling window is a strip-shaped coupling window 2. In other embodiments of the present application, a strip-shaped coupling window 2 may also be used as the coupling window 2 for other main path coupling or the coupling window 2 for cross coupling.
Example four
As shown in fig. 9, the present embodiment is different from the first embodiment in that the main-path coupled coupling window 2 or/and the cross-coupled coupling window 2 adopt Contraband type windows.
Specifically, in this embodiment, an Contraband type window is used as the second coupling window. In other embodiments of the present application, Contraband-type windows may be used for the coupling window 2 of other main path coupling or the coupling window 2 of cross coupling.
EXAMPLE five
As shown in fig. 10, the present embodiment is different from the first embodiment in that the coupling window 2 for main path coupling and/or the coupling window 2 for cross coupling adopt L-shaped windows.
Specifically, in this embodiment, the second coupling window is an L-shaped window, and the surfaces of the second resonance part 6 and the third resonance part 7 are provided with an L-shaped coupling window 2, which is formed by two strip-shaped windows with the same length, and is disposed at the edge of one corner of the overlapping surface of the dielectric body 1. In other embodiments of the present application, L-shaped windows may be used for the coupling windows 2 coupled by other main paths or the coupling windows 2 coupled by cross coupling.
EXAMPLE six
As shown in fig. 11, the difference between this embodiment and the fifth embodiment is that the number of L-shaped windows of the main-path coupled coupling window 2 or/and the cross-coupled coupling window 2 is two.
Specifically, in this embodiment, the second coupling window adopts two L-shaped windows, two L-shaped coupling windows 2 are disposed at two corners of the surfaces of the second resonance part 6 and the third resonance part 7, and each L-shaped coupling window 2 is formed by communicating two strip-shaped windows with the same length. In other embodiments of the present application, the other main-path coupled coupling windows 2 or the cross-coupled coupling windows 2 may be arranged like the second coupling window.
The above are only embodiments of the present invention, and the present invention is not limited to the field related to this embodiment, and the common general knowledge of the known specific structures and characteristics in the scheme is not described too much, and those skilled in the art know the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the scheme, and some typical known structures or known methods should not become the obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A dielectric waveguide filter for improving harmonic performance, comprising: the resonant cavity comprises a dielectric body and at least two resonant parts positioned on different dielectric bodies, wherein the resonant parts are coupled together through a coupling window, and the coupling window is arranged on the edge of the dielectric body.
2. A dielectric waveguide filter according to claim 1 for improving harmonic performance, wherein: the coupling window is a coupling window of main path coupling or a coupling window of cross coupling.
3. A dielectric waveguide filter according to claim 2 for improving harmonic performance, wherein: the dielectric body comprises a first body and a second body, the first body comprises a sixth resonance part, a first resonance part and a second resonance part which are sequentially arranged, and the second body comprises a fifth resonance part, a fourth resonance part and a third resonance part which are arranged corresponding to the resonance parts on the first body;
the coupling windows include a first coupling window provided on a surface of the first resonance part and a surface of the fourth resonance part, a second coupling window provided on a surface of the second resonance part and a surface of the third resonance part, and a third coupling window provided on a surface of the fifth resonance part and a surface of the sixth resonance part, the second coupling window and the third coupling window being main path coupling windows.
4. A dielectric waveguide filter according to claim 3 for improving harmonic performance, wherein: the first coupling window is a cross-coupling window, and the first coupling window is disposed at a middle position of surfaces of the first resonance part and the fourth resonance part.
5. A dielectric waveguide filter according to claim 3 for improving harmonic performance, wherein: the first body is arranged on the surface of the joint of the first resonance part and the second resonance part, the second body is arranged on the surface of the joint of the third resonance part and the fourth resonance part, and the fourth coupling window is a cross coupling window.
6. A dielectric waveguide filter according to claim 3 for improving harmonic performance, wherein: the medium body is provided with an input interface and an output interface, the input interface is arranged on the first resonance part, and the output interface is arranged on the sixth resonance part.
7. A dielectric waveguide filter according to claim 1 for improving harmonic performance, wherein: the coupling window is in the shape of a bar, an L or Contraband.
8. A dielectric waveguide filter according to claim 1 for improving harmonic performance, wherein: the coupling windows are symmetrically distributed along the central axis of the dielectric body.
9. A radio frequency module, characterized by: a dielectric waveguide filter comprising an improved harmonic performance according to any one of claims 1 to 8.
10. A base station, characterized by: comprising a radio frequency module as claimed in claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921066797.XU CN210111005U (en) | 2019-07-09 | 2019-07-09 | Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station |
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| CN201921066797.XU CN210111005U (en) | 2019-07-09 | 2019-07-09 | Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336102A (en) * | 2019-07-09 | 2019-10-15 | 重庆思睿创瓷电科技有限公司 | A kind of dielectric waveguide filter, radio-frequency module and base station improving harmonic performance |
| CN112736387A (en) * | 2020-12-29 | 2021-04-30 | 石家庄市鹿泉区麦特思电子科技有限公司 | Dielectric ceramic filter |
| CN112928410A (en) * | 2021-01-27 | 2021-06-08 | 武汉凡谷电子技术股份有限公司 | Dual-mode dielectric filter and zero adjusting method thereof |
| CN112928411A (en) * | 2021-01-27 | 2021-06-08 | 武汉凡谷电子技术股份有限公司 | Dual-mode dielectric filter and zero adjusting method thereof |
-
2019
- 2019-07-09 CN CN201921066797.XU patent/CN210111005U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336102A (en) * | 2019-07-09 | 2019-10-15 | 重庆思睿创瓷电科技有限公司 | A kind of dielectric waveguide filter, radio-frequency module and base station improving harmonic performance |
| CN110336102B (en) * | 2019-07-09 | 2024-06-21 | 重庆思睿创瓷电科技有限公司 | Dielectric waveguide filter, radio frequency module and base station for improving harmonic performance |
| CN112736387A (en) * | 2020-12-29 | 2021-04-30 | 石家庄市鹿泉区麦特思电子科技有限公司 | Dielectric ceramic filter |
| CN112928410A (en) * | 2021-01-27 | 2021-06-08 | 武汉凡谷电子技术股份有限公司 | Dual-mode dielectric filter and zero adjusting method thereof |
| CN112928411A (en) * | 2021-01-27 | 2021-06-08 | 武汉凡谷电子技术股份有限公司 | Dual-mode dielectric filter and zero adjusting method thereof |
| CN112928411B (en) * | 2021-01-27 | 2022-05-24 | 武汉凡谷电子技术股份有限公司 | Dual-mode dielectric filter and zero adjusting method thereof |
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