CN113394539B

CN113394539B - Resonant cavity structure, resonator, filter and communication device

Info

Publication number: CN113394539B
Application number: CN202110649915.5A
Authority: CN
Inventors: 谢懿非; 丁海; 林显添; 孟弼慧; 郭春波
Original assignee: Comba Telecom Technology Guangzhou Ltd; Jingxin RF Technology Guangzhou Co ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd; Jingxin RF Technology Guangzhou Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-07-08
Anticipated expiration: 2041-06-10
Also published as: CN113394539A

Abstract

The invention relates to a resonant cavity structure, a resonator, a filter and a communication device. Since the center of the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first line Z1 away from the second wall plate, the center of the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second line Z2 away from the second wall plate; alternatively, the center of the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first line Z1 close to the second wall plate, and the center of the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second line Z2 close to the second wall plate. Therefore, on one hand, the material cost can be saved, the assembly process can be simplified, and the production efficiency can be improved; on the other hand, insertion loss is reduced; in addition, the reliability in normal temperature and high and low temperature environments is improved; in addition, the weight of the product is reduced, and the product competition rate is improved.

Description

Resonant cavity structure, resonator, filter and communication device

Technical Field

The invention relates to the technical field of communication products, in particular to a resonant cavity structure, a resonator, a filter and a communication device.

Background

The filter is a frequency-selective device and is an indispensable part of the communication apparatus. With the rapid development of communication systems, the 5G era has entered. The mutual interference between the frequency bands of the filter is increasing, which requires stronger suppression to process the interference from different frequency bands, and how to reduce the insertion loss of the filter is a difficult problem to be solved. Under the background, the introduction of the high-Q-value TE mode dielectric resonator can enable the filter to achieve strong suppression and reduce insertion loss at the same time. Because the cost of the TE mode dielectric resonator is relatively high, if the filter is made by using full TE mode resonance, the cost of the filter product will be greatly increased.

Conventionally, in order to achieve both cost and performance, a filter is often manufactured by mixing a TE mode dielectric resonator and a metal resonator. For the mixed structure of the TE mode dielectric resonator and the metal resonator, the implementation manner of cross coupling is usually to set a window on the wall plate of two adjacent metal resonators, and to set a flying bar in the window, so that the zero point can be generated at the low end of the pass band (i.e. the left end of the pass band). However, for the filter manufactured by mixing the TE mode dielectric resonator and the metal resonator, the device still has the defects of high cost, heavy weight, low production efficiency and poor stability in high and low temperature environments.

Disclosure of Invention

Accordingly, there is a need to overcome the drawbacks of the prior art and to provide a resonator structure, a resonator, a filter and a communication device, which can reduce the cost and weight of the product, improve the production efficiency, and improve the stability in high and low temperature environments.

The technical scheme is as follows: a resonant cavity structure, the resonant cavity structure comprising: the metal resonator block is provided with a first concave part, a second concave part and a third concave part which are arranged adjacent to each other in pairs on the surface of one side of the metal resonator block; the first concave part is used for installing a first metal resonator, the second concave part is used for installing a first dielectric resonator, and the third concave part is used for installing a second metal resonator; wherein the wall plate between the first recess and the second recess that separates the first recess from the second recess is a first wall plate, the wall plate between the first recess and the third recess that separates the first recess from the third recess is a second wall plate, and the wall plate between the second recess and the third recess that separates the second recess from the third recess is a third wall plate; a first coupling window is arranged on the first wall plate, a second coupling window is arranged on the second wall plate, and a third coupling window is arranged on the third wall plate; defining a first line Z1 as a line connecting a center of projection of the first metal resonator on one of the side surfaces of the metal resonator block and a center of projection of the first dielectric resonator on one of the side surfaces of the metal resonator block; defining a line connecting the center of projection of the second metal resonator on one side surface of the metal resonator block and the center of projection of the first dielectric resonator on one side surface of the metal resonator block as a second line Z2;

the center of the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first connecting line Z1 away from the second wall plate, and the center of the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second connecting line Z2 away from the second wall plate; alternatively, the center of the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first line Z1 close to the second wall plate, and the center of the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second line Z2 close to the second wall plate.

In the resonant cavity structure, since the center of the projection of the first coupling window on one side surface of the metal resonant block is located on the side of the first connecting line Z1 away from the second wall plate, the center of the projection of the third coupling window on one side surface of the metal resonant block is located on the side of the second connecting line Z2 away from the second wall plate; alternatively, the center of the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first line Z1 close to the second wall plate, and the center of the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second line Z2 close to the second wall plate. The filter comprising the resonant cavity structure is simulated, and a zero point can be generated at the lower end of the pass band according to a simulation diagram. Therefore, on one hand, the flying rod does not need to be arranged on the second wall plate as in the traditional technology, so that the material cost can be saved, the assembly process can be simplified, and the production efficiency can be improved; on the other hand, insertion loss is reduced; in addition, the reliability in normal temperature and high and low temperature environments is improved; in addition, the weight of the product is reduced, and the product competition rate is improved.

In one embodiment, the projection of the first coupling window on one of the lateral surfaces of the metal resonator block is located on the side of the first line Z1 away from the second wall plate, and the projection of the third coupling window on one of the lateral surfaces of the metal resonator block is located on the side of the second line Z2 away from the second wall plate; alternatively, the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first line Z1 close to the second wall plate, and the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second line Z2 close to the second wall plate.

In one embodiment, a fourth concave part and a fifth concave part are arranged on one side surface of the metal resonance block; the second concave part, the third concave part and the fourth concave part are arranged adjacent to each other in pairs; the third concave part, the fourth concave part and the fifth concave part are arranged adjacent to each other in pairs; the fourth recess is used for installing a second dielectric resonator, and the fifth recess is used for installing a third metal resonator;

wherein the wall panel between the third recess and the fourth recess that separates the third recess from the fourth recess is a fourth wall panel, the wall panel between the third recess and the fifth recess that separates the third recess from the fifth recess is a fifth wall panel, and the wall panel between the fourth recess and the fifth recess that separates the fourth recess from the fifth recess is a sixth wall panel; a fourth coupling window is arranged on the fourth wall plate, a fifth coupling window is arranged on the fifth wall plate, and a sixth coupling window is arranged on the sixth wall plate;

a third line Z3 is defined as a line connecting the center of projection of the second metal resonator on one side surface of the metal resonator block and the center of projection of the second dielectric resonator on one side surface of the metal resonator block; defining a fourth connection line Z4 as a connection line between the center of projection of the third metal resonator on one of the side surfaces of the metal resonator block and the center of projection of the second dielectric resonator on one of the side surfaces of the metal resonator block;

the center of the projection of the fourth coupling window on one of the side surfaces of the metal resonator block is located on the side of the third wire Z3 away from the fifth wall plate, and the center of the projection of the sixth coupling window on one of the side surfaces of the metal resonator block is located on the side of the fourth wire Z4 away from the fifth wall plate; alternatively, a center of a projection of the fourth coupling window on one of the side surfaces of the metal resonator block is located on a side of the third line Z3 adjacent to the fifth wall plate, and a center of a projection of the sixth coupling window on one of the side surfaces of the metal resonator block is located on a side of the fourth line Z4 adjacent to the fifth wall plate.

In one of the embodiments, the projection of the fourth coupling window on one of the lateral surfaces of the metallic resonator block is located on the side of the third line Z3 remote from the fifth wall panel, and the projection of the sixth coupling window on one of the lateral surfaces of the metallic resonator block is located on the side of the fourth line Z4 remote from the fifth wall panel; alternatively, a projection of the fourth coupling window on one of the side surfaces of the metal resonator block is located on a side of the third line Z3 adjacent to the fifth wall panel, and a projection of the sixth coupling window on one of the side surfaces of the metal resonator block is located on a side of the fourth line Z4 adjacent to the fifth wall panel.

In one embodiment, the first wall plate extends to the bottom wall of the first recess, the distance from the top wall of the first wall plate to the bottom wall of the first recess is h1, the depth of the first recess is S1, 1/2S1 ≦ h1 ≦ S1; the panel surface of the first wallboard is provided with a first boss, the first boss extends to the bottom wall of the first concave part, the distance from the top wall of the first boss to the bottom wall of the first concave part is h2, and h2 ≦ h 1.

In one embodiment, the resonant cavity structure further includes a signal input terminal and a signal output terminal disposed on the metal resonant block.

A resonator comprises the resonant cavity structure, and further comprises a first metal resonator, a first dielectric resonator and a second metal resonator; the first metal resonator is disposed in the first recess, the first dielectric resonator is disposed in the second recess, and the second metal resonator is disposed in the third recess.

The resonator described above, since the center of projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first line Z1 away from the second wall plate, the center of projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second line Z2 away from the second wall plate; alternatively, the center of the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first line Z1 close to the second wall plate, and the center of the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second line Z2 close to the second wall plate. The filter comprising the resonant cavity structure is simulated, and a zero point can be generated at the lower end of the pass band according to a simulation chart. Therefore, on one hand, the flying rod does not need to be arranged on the second wall plate as in the traditional technology, so that the material cost can be saved, the assembly process can be simplified, and the production efficiency can be improved; on the other hand, insertion loss is reduced; in addition, the reliability in normal temperature and high and low temperature environments is improved; in addition, the weight of the product is reduced, and the product competition rate is improved.

In one embodiment, the resonator further comprises a metal cover plate covering one side surface of the metal resonance block; the first metal resonator comprises a first metal resonance rod arranged in the first concave part and a first metal tuning rod arranged on the metal cover plate in a position-adjustable manner; the first dielectric resonator comprises a first dielectric resonance rod arranged in the second concave part and a first dielectric tuning disc arranged on the metal cover plate in a position-adjustable manner; the second metal resonator comprises a second metal resonance rod arranged in the third concave part and a second metal tuning rod arranged on the metal cover plate in a position-adjustable mode.

In one embodiment, the first dielectric resonator further comprises an insulating support structure disposed on the bottom wall of the second recess, and the first dielectric resonant rod is mounted on the insulating support structure; the first medium tuning disc is arranged on the metal cover plate in a position-adjustable mode through an insulating adjusting rod.

In one embodiment, a first metal adjusting rod with adjustable position is arranged on the metal cover plate, and the first metal adjusting rod extends into the first coupling window; a second metal adjusting rod with an adjustable position is arranged on the metal cover plate and extends into the second coupling window; and a third metal adjusting rod with an adjustable position is arranged on the metal cover plate and extends into the third coupling window.

A filter comprising said resonator.

A communication device comprising said filter.

In the filter and communication device, since the center of the projection of the first coupling window on one side surface of the metal resonator block is located on the side of the first connecting line Z1 away from the second wall plate, the center of the projection of the third coupling window on one side surface of the metal resonator block is located on the side of the second connecting line Z2 away from the second wall plate; alternatively, the centre of projection of the first coupling window on one of the lateral surfaces of the metallic resonator mass is located on the side of the first line Z1 close to the second wall panel, and the centre of projection of the third coupling window on one of the lateral surfaces of the metallic resonator mass is located on the side of the second line Z2 close to the second wall panel. The filter comprising the resonant cavity structure is simulated, and a zero point can be generated at the lower end of the pass band according to a simulation diagram. Therefore, on one hand, the flying rod does not need to be arranged on the second wall plate as in the traditional technology, so that the material cost can be saved, the assembly process can be simplified, and the production efficiency can be improved; on the other hand, insertion loss is reduced; in addition, the reliability in normal temperature and high and low temperature environments is improved; in addition, the weight of the product is reduced, and the product competition rate is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a resonator according to an embodiment of the present invention with a metal cover plate separated;

FIG. 2 is a schematic structural diagram of a resonant cavity structure according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a resonant cavity structure according to another embodiment of the present invention;

FIG. 4 is a schematic top view of a resonator according to an embodiment of the present invention with a metal cover hidden;

FIG. 5 is a schematic top view of a resonator according to another embodiment of the present invention with a metal cover hidden;

FIG. 6 is a schematic top view of a resonator according to another embodiment of the present invention with a metal cover hidden;

FIG. 7 is a schematic top view of a resonator according to still another embodiment of the present invention with a metal cover hidden;

FIG. 8 is a schematic top view of a resonator according to an embodiment of the present invention;

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

FIG. 10 is a cross-sectional structural view at B-B of FIG. 8;

fig. 11 is a response graph of a resonator according to an embodiment of the present invention.

10. A metal resonator block; 11. a first recess; 12. a second recess; 13. a third recess; 14. a first wall panel; 141. a first coupling window; 142. a first boss; 15. a second wall panel; 151. a second coupling window; 16. a third wall panel; 161. a third coupling window; 162. a second boss; 17. a fourth recess; 18. a fifth recess; 191. a fourth wall panel; 1911. a fourth coupling window; 192. a fifth wall panel; 1921. a fifth coupling window; 193. a sixth wall panel; 1931. a sixth coupling window; 194. a signal input terminal; 195. a signal output terminal; 20. a first metal resonator; 21. a first metal resonance rod; 22. a first metal tuning rod; 30. a first dielectric resonator; 31. a first dielectric resonant rod; 32. a first media tuning disk; 33. an insulating support structure; 34. an insulating screw; 40. a second metal resonator; 41. a second metal resonance rod; 42. a second metal tuning rod; 50. a second dielectric resonator; 60. a third metal resonator; 70. a metal cover plate; 71. a first threaded hole; 72. a second threaded hole; 73. a third threaded hole; 74. a fourth threaded hole; 75. a fifth threaded hole; 76. a sixth threaded hole; 81. a first metal adjusting rod; 82. a second metal adjusting rod; 83. and a third metal adjusting rod.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1, fig. 2 and fig. 4, fig. 1 shows a schematic structural diagram of a resonator according to an embodiment of the present invention when a metal cover plate 70 is separated, fig. 2 shows a schematic structural diagram of a resonant cavity according to an embodiment of the present invention, and fig. 4 shows a schematic structural diagram of a resonator according to an embodiment of the present invention when the metal cover plate 70 is hidden. According to an embodiment of the present invention, a resonant cavity structure includes a metal resonant block 10. The metal resonator block 10 has a first recess 11, a second recess 12 and a third recess 13 on one surface thereof, which are adjacent to each other in pairs. The first recess 11 is used for mounting the first metal resonator 20, the second recess 12 is used for mounting the first dielectric resonator 30, and the third recess 13 is used for mounting the second metal resonator 40. The wall plate between the first concave portion 11 and the second concave portion 12 to separate the first concave portion 11 from the second concave portion 12 is a first wall plate 14, the wall plate between the first concave portion 11 and the third concave portion 13 to separate the first concave portion 11 from the third concave portion 13 is a second wall plate 15, and the wall plate between the second concave portion 12 and the third concave portion 13 to separate the second concave portion 12 from the third concave portion 13 is a third wall plate 16. A first coupling window 141 is formed on the first wall plate 14, a second coupling window 151 is formed on the second wall plate 15, and a third coupling window 161 is formed on the third wall plate 16. A line connecting the center of the projection of the first metal resonator 20 on one of the side surfaces of the metal resonator block 10 and the center of the projection of the first dielectric resonator 30 on one of the side surfaces of the metal resonator block 10 is defined as a first line Z1. A line connecting the center of projection of the second metal resonator 40 on one of the side surfaces of the metal resonator block 10 and the center of projection of the first dielectric resonator 30 on one of the side surfaces of the metal resonator block 10 is defined as a second line Z2.

Referring to fig. 4 and 6, fig. 6 is a schematic top view illustrating a metal cover plate 70 of a resonator according to another embodiment of the invention when hidden. The center of the projection of the first coupling window 141 on one of the side surfaces of the metal resonator block 10 is located on the side of the first line Z1 away from the second wall plate 15, and the center of the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 is located on the side of the second line Z2 away from the second wall plate 15. Alternatively, referring to fig. 5 and 7, fig. 5 shows a schematic top view structure of a resonator according to another embodiment of the present invention when the metal cover plate 70 is hidden, and fig. 7 shows a schematic top view structure of a resonator according to yet another embodiment of the present invention when the metal cover plate 70 is hidden. The center of the projection of the first coupling window 141 on one of the side surfaces of the metallic resonator block 10 is located on the side of the first line Z1 close to the second wall plate 15, and the center of the projection of the third coupling window 161 on one of the side surfaces of the metallic resonator block 10 is located on the side of the second line Z2 close to the second wall plate 15.

It should be noted that, since the first recess 11 is used for installing the first metal resonator 20, that is, the first recess 11 corresponds to a metal resonant cavity; since the second recess 12 is used for installing the first dielectric resonator 30, that is, the second recess 12 corresponds to a dielectric resonant cavity; since the third recess 13 is used for installing the second metal resonator 40, that is, the third recess 13 is equivalent to another metal resonator.

It should be noted that the metal resonator block 10 may be of a metal structure as a whole, or may be obtained by providing a metal layer on the entire outer surface of the dielectric block (the entire outer surface refers to the surface of the dielectric block exposed to the outside, and includes both the wall surface of the recess and the wall surface of the coupling window).

In addition, it should be noted that the first concave portion 11, the second concave portion 12, and the third concave portion 13 are disposed adjacent to each other in pairs, which means that the first concave portion 11 is disposed adjacent to the second concave portion 12 and the third concave portion 13, respectively, the second concave portion 12 is disposed adjacent to the first concave portion 11 and the third concave portion 13, respectively, and the third concave portion 13 is disposed adjacent to the first concave portion 11 and the second concave portion 12, respectively.

In the resonator structure described above, since the center of the projection of the first coupling window 141 on one of the side surfaces of the metal resonator block 10 is located on the side of the first connecting line Z1 away from the second wall plate 15, the center of the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 is located on the side of the second connecting line Z2 away from the second wall plate 15; alternatively, the center of the projection of the first coupling window 141 on one of the side surfaces of the metal resonator block 10 is located on the side of the first line Z1 close to the second wall plate 15, and the center of the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 is located on the side of the second line Z2 close to the second wall plate 15. When a filter including the resonant cavity structure is simulated, it can be seen from the simulation chart of fig. 11 that a zero point is generated at the lower end of the pass band (i.e., the left end of the pass band). Therefore, on one hand, the flying rod does not need to be arranged on the second wall plate 15 as in the traditional technology, so that the material cost can be saved, the assembly process can be simplified, and the production efficiency can be improved; on the other hand, the insertion loss is reduced (ohmic loss caused by flying bars is completely avoided by the product due to the reduction of the flying bars); in addition, the reliability in normal temperature and high and low temperature environments is improved (the size of the conventional flying rod is changed due to expansion caused by heat and contraction caused by cold under the high and low temperature environments, and the product performance is adversely affected); in addition, the weight of the product is reduced, and the product competitiveness is improved.

Referring to fig. 4 to 7, further, a projection of the first coupling window 141 on one side surface of the metal resonator block 10 is located on a side of the first connecting line Z1 away from the second wall plate 15, and a projection of the third coupling window 161 on one side surface of the metal resonator block 10 is located on a side of the second connecting line Z2 away from the second wall plate 15; alternatively, the projection of the first coupling window 141 on one of the side surfaces of the metal resonator block 10 is located on the side of the first line Z1 close to the second wall plate 15, and the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 is located on the side of the second line Z2 close to the second wall plate 15. Thus, not only can a zero point be generated at the lower end of the pass band, but also a better coupling effect of the first metal resonator and the first dielectric resonator at the first coupling window 141 can be ensured, and a better coupling effect of the second metal resonator and the first dielectric resonator at the third coupling window 161 can be ensured.

As an alternative, the center of the projection of the first coupling window 141 on one of the side surfaces of the metal resonator block 10 is located on the side of the first line Z1 away from the second wall plate 15, and the center of the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 is located on the side of the second line Z2 away from the second wall plate 15. Meanwhile, the projection of the first coupling window 141 on one side surface of the metal resonator block 10 intersects the first line Z1, i.e., the projection is distributed on both sides of the first line Z1; likewise, the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 intersects the second connecting line Z2, i.e. the projection is distributed on both sides of the second connecting line Z2.

As an alternative, the center of the projection of the first coupling window 141 on one of the side surfaces of the metal resonator block 10 is located on the side of the first line Z1 close to the second wall plate 15, and the center of the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 is located on the side of the second line Z2 close to the second wall plate 15. Meanwhile, the projection of the first coupling window 141 on one side surface of the metal resonator block 10 intersects the first line Z1, i.e., the projection is distributed on both sides of the first line Z1; likewise, the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 intersects the second connecting line Z2, i.e. the projection is distributed on both sides of the second connecting line Z2.

It should be noted that, the metal resonator block 10 is provided with a first concave portion 11, a second concave portion 12 and a third concave portion 13 on one side surface thereof, that is, two metal resonators and one dielectric resonator are provided, and two metal resonators and one dielectric resonator may be provided respectively. However, in the present embodiment, the first concave portion 11, the second concave portion 12, and the third concave portion 13 are not limited to the metal resonator block 10, and the metal resonator block 10 provided with the first concave portion 11, the second concave portion 12, and the third concave portion 13 is a minimum unit, and one, two, three, or more concave portions may be additionally provided on one surface of the metal resonator block 10, and may be provided according to actual conditions.

Referring to fig. 1, 2 and 4 again, in one embodiment, a fourth recess 17 and a fifth recess 18 are formed on one side surface of the metal resonator block 10. The second recess 12, the third recess 13 and the fourth recess 17 are arranged adjacent to each other two by two. The third recess 13, the fourth recess 17 and the fifth recess 18 are arranged adjacent to each other two by two. The fourth recess 17 is for mounting the second dielectric resonator 50 and the fifth recess 18 is for mounting the third metal resonator 60.

The wall plate located between third recess 13 and fourth recess 17 and separating third recess 13 from fourth recess 17 is fourth wall plate 191, the wall plate located between third recess 13 and fifth recess 18 and separating third recess 13 from fifth recess 18 is fifth wall plate 192, and the wall plate located between fourth recess 17 and fifth recess 18 and separating fourth recess 17 from fifth recess 18 is sixth wall plate 193. A fourth coupling window 1911 is formed on the fourth wall plate 191, a fifth coupling window 1921 is formed on the fifth wall plate 192, and a sixth coupling window 1931 is formed on the sixth wall plate 193.

A line connecting the center of projection of the second metal resonator 40 on one of the side surfaces of the metal resonator block 10 and the center of projection of the second dielectric resonator 50 on one of the side surfaces of the metal resonator block 10 is defined as a third line Z3; a fourth line Z4 is defined as a line connecting the center of the projection of the third metal resonator 60 on one of the side surfaces of the metal resonator block 10 and the center of the projection of the second dielectric resonator 50 on one of the side surfaces of the metal resonator block 10.

Referring to fig. 6 and 7, the center of the projection of the fourth coupling window 1911 on one side surface of the metal resonator block 10 is located on the side of the third line Z3 away from the fifth wall plate 192, and the center of the projection of the sixth coupling window 1931 on one side surface of the metal resonator block 10 is located on the side of the fourth line Z4 away from the fifth wall plate 192; alternatively, referring to fig. 4 and 5, the center of the projection of the fourth coupling window 1911 on one of the side surfaces of the metal resonator block 10 is located on the side of the third line Z3 adjacent to the fifth wall plate 192, and the center of the projection of the sixth coupling window 1931 on one of the side surfaces of the metal resonator block 10 is located on the side of the fourth line Z4 adjacent to the fifth wall plate 192.

Thus, by simulating the filter including the resonant cavity structure, it can be seen from the simulation diagram of fig. 11 that another zero point can be generated at the lower end of the pass band (i.e., the left end of the pass band), and there are two zero points. Therefore, on one hand, the flying rod does not need to be arranged on the fifth wall plate 192 as in the traditional technology, so that the material cost can be saved, the assembly process can be simplified, and the production efficiency can be improved; on the other hand, the insertion loss is reduced (ohmic loss caused by flying bars is completely avoided by the product due to the reduction of the flying bars); in addition, the reliability in normal temperature and high and low temperature environments is improved (the size of the conventional flying rod is changed due to expansion caused by heat and contraction caused by cold under the high and low temperature environments, and the product performance is adversely affected); in addition, the weight of the product is reduced, and the product competition rate is improved.

Referring to fig. 4 to 7, further, a projection of the fourth coupling window 1911 on one side surface of the metal resonator block 10 is located on a side of the third connecting line Z3 away from the fifth wall plate 192, and a projection of the sixth coupling window 1931 on one side surface of the metal resonator block 10 is located on a side of the fourth connecting line Z4 away from the fifth wall plate 192; alternatively, the projection of the fourth coupling window 1911 on one of the side surfaces of the metal resonator block 10 is located on the side of the third line Z3 adjacent to the fifth wall panel 192, and the projection of the sixth coupling window 1931 on one of the side surfaces of the metal resonator block 10 is located on the side of the fourth line Z4 adjacent to the fifth wall panel 192.

As an alternative, the center of the projection of the fourth coupling window 1911 on one of the side surfaces of the metal resonator block 10 is located on the side of the third line Z3 away from the fifth wall plate 192, and the center of the projection of the sixth coupling window 1931 on one of the side surfaces of the metal resonator block 10 is located on the side of the fourth line Z4 away from the second wall plate 15. Meanwhile, the projection of the fourth coupling window 1911 on one of the side surfaces of the metal resonator block 10 intersects the third line Z3, i.e., the projection is distributed on both sides of the third line Z3; likewise, the projection of the fourth coupling window 1911 on one of the side surfaces of the metal resonator block 10 intersects the fourth line Z4, i.e., the projection is distributed on both sides of the fourth line Z4.

As an alternative, the center of the projection of the fourth coupling window 1911 on the one-side surface of the metal resonator block 10 is located on the side of the third line Z3 close to the fifth wall plate 192, and the center of the projection of the sixth coupling window 1931 on the one-side surface of the metal resonator block 10 is located on the side of the fourth line Z4 close to the second wall plate 15. Meanwhile, the projection of the fourth coupling window 1911 on one of the side surfaces of the metal resonator block 10 intersects the third line Z3, i.e., the projection is distributed on both sides of the third line Z3; likewise, the projection of the fourth coupling window 1911 on one of the side surfaces of the metal resonator block 10 intersects the fourth line Z4, i.e., the projection is distributed on both sides of the fourth line Z4.

Referring to fig. 1 and 3, fig. 3 is a schematic structural diagram of a resonant cavity structure according to another embodiment of the invention. In one embodiment, the first wall panel 14 extends to the bottom wall of the first recess 11, the distance from the top wall of the first wall panel 14 to the bottom wall of the first recess 11 is h1, the depth of the first recess 11 is S1, 1/2S1 ≦ h1 ≦ S1; the first boss 142 is arranged on the panel surface of the first wall panel 14, the first boss 142 extends to the bottom wall of the first recess 11, the distance from the top wall of the first boss 142 to the bottom wall of the first recess 11 is h2, and h2 ≦ h 1. Thus, the coupling amount of the first coupling window 141 can be adjusted by the first protrusion 142 disposed on the panel surface of the first wall panel 14. Similarly, a second boss 162 may be disposed on the third wall panel 16, and the coupling amount of the third coupling window 161 may be adjusted by the second boss 162. In addition, bosses may be further provided on the fourth wall plate 191 and the sixth wall plate 193, which is not limited herein.

Referring to fig. 6, further, the distance between the two opposite port walls of the first coupling window 141 is W1, the distance between the port wall of the first coupling window 141 away from the first connection line Z1 and the first connection line Z1 is W2, and W1 ≦ W2.

Further, when 1/2S1 ≦ h1, the smaller h1, the greater the amount of coupling of the first coupling window 141.

Further, when W1 ≦ W2, the larger W1, the larger the amount of coupling of the first coupling window 141.

Further, when h2 ≦ h1, the larger h2, the greater the amount of coupling of the first coupling window 141.

It is understood that the setting parameters of the third coupling window 161 and the third wall panel 16, the setting parameters of the fourth coupling window 1911 and the fourth wall panel 191, and the setting parameters of the sixth coupling window 1931 and the sixth wall panel 193 are similar to those of the first coupling window 141 and the first wall panel 14, and are not described herein again.

Referring to fig. 1, in one embodiment, the resonator structure further includes a signal input terminal 194 and a signal output terminal 195 disposed on the metal resonator block 10.

Further, when the resonant cavity structure is configured by the first concave portion 11, the second concave portion 12 and the third concave portion 13, the signal input end 194 is coupled to the first metal resonator 20, and the signal output end 195 is coupled to the second metal resonator 40; when the resonant cavity structure is configured by the first recess 11, the second recess 12, the third recess 13, the fourth recess 17 and the fifth recess 18, the signal input end 194 is coupled to the first metal resonator 20, and the signal output end 195 is coupled to the third metal resonator 60.

Referring to fig. 1, in an embodiment, a resonator includes the resonant cavity structure of any of the above embodiments, and further includes a first metal resonator 20, a first dielectric resonator 30, and a second metal resonator 40. First metal resonator 20 is disposed in first recess 11, first dielectric resonator 30 is disposed in second recess 12, and second metal resonator 40 is disposed in third recess 13.

The resonator described above, since the center of projection of the first coupling window 141 on one of the side surfaces of the metallic resonator block 10 is located on the side of the first line Z1 remote from the second wall plate 15, the center of projection of the third coupling window 161 on one of the side surfaces of the metallic resonator block 10 is located on the side of the second line Z2 remote from the second wall plate 15; alternatively, the center of the projection of the first coupling window 141 on one of the side surfaces of the metal resonator block 10 is located on the side of the first line Z1 close to the second wall plate 15, and the center of the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 is located on the side of the second line Z2 close to the second wall plate 15. The filter including the resonant cavity structure is simulated, and it can be known from the simulation diagram that a zero point can be generated at the low end of the pass band (i.e., the left end of the pass band). Therefore, on one hand, the flying rod does not need to be arranged on the second wall plate 15 as in the traditional technology, so that the material cost can be saved, the assembly process can be simplified, and the production efficiency can be improved; on the other hand, the insertion loss is reduced (ohmic loss caused by flying bars is completely avoided by the product due to the reduction of the flying bars); in addition, the reliability in normal temperature and high and low temperature environments is improved (the size of the conventional flying rod is changed due to expansion caused by heat and contraction caused by cold under the high and low temperature environments, and the product performance is adversely affected); in addition, the weight of the product is reduced, and the product competition rate is improved.

Further, the first metal resonator 20, the first dielectric resonator 30 and the second metal resonator 40 in this embodiment are all cylindrical, i.e. the projections on one side surface of the metal resonator block 10 are all circular, so the center of the projection is the center of the circle. Of course, the first metal resonator 20, the first dielectric resonator 30 and the second metal resonator 40 may have other shapes, for example, a cylindrical shape having a square cross section perpendicular to the axial direction thereof, and the projections on the surfaces of one side of the metal resonator block 10 are each square, so that the center of the projection becomes the intersection point of two diagonal lines of the square.

Referring to fig. 1, 8 to 10, fig. 8 is a schematic top view of a resonator according to an embodiment of the present invention, fig. 9 is a sectional structural diagram of a-a portion of fig. 8, and fig. 10 is a sectional structural diagram of a-B portion of fig. 8. In one embodiment, the resonator further includes a metal cover plate 70 that covers one of the side surfaces of the metal resonator block 10. The first metal resonator 20 includes a first metal resonance rod 21 disposed in the first recess 11, and a first metal tuning rod 22 disposed on the metal cover plate 70 with a position adjustable. The first dielectric resonator 30 includes a first dielectric resonance rod 31 disposed in the second recess 12, and a first dielectric tuning disk 32 positionally adjustably disposed on the metal cover plate 70. The second metal resonator 40 includes a second metal resonance rod 41 disposed in the third recess 13, and a second metal tuning rod 42 positionally adjustably disposed on the metal cover plate 70.

Referring to fig. 1 and 10, further, the first dielectric resonator 30 further includes an insulating support structure 33 disposed on the bottom wall of the second recess 12, and the first dielectric resonator rod 31 is mounted on the insulating support structure 33. The first dielectric tuning disk 32 is adjustably positioned on the metal cover plate 70 by an insulating adjustment rod.

Further, the first metal tuning rod 22 is, for example, a metal screw, and the metal cover plate 70 is provided with a first threaded hole 71 adapted to the first metal tuning rod 22. By rotating the first metal tuning rod 22, the depth of the first metal tuning rod 22 extending into the first recess 11 can be adjusted, so as to adjust the coupling strength of the first metal resonator 20. Similarly, the second metal tuning rod 42 is, for example, a metal screw, and the metal cover plate 70 is provided with a second threaded hole 72 corresponding to the second metal tuning rod 42. Similarly, the insulation adjusting rod is, for example, an insulation screw 34, and the metal cover plate 70 is provided with a third threaded hole 73 corresponding to the insulation screw 34. The dielectric resonator disc is fixedly mounted on the insulating screw 34 by, for example, bonding, riveting, clamping, etc., and when the insulating screw 34 is rotated, the depth of the dielectric resonator disc extending into the second recess 12 can be adjusted, so as to adjust the coupling amount.

As an alternative, the first metal tuning rod 22 and the second metal tuning rod 42 may also be other rod bodies capable of adjusting positions on the metal cover plate 70, for example, rod bodies disposed on the metal cover plate 70 in a clamping manner, and a plurality of clamping positions are sequentially disposed on the rod bodies at intervals, and the clamping positions can be clamped and fixedly mounted on the metal cover plate 70, and one of the clamping positions is selectively fixed on the metal cover plate 70 according to the depth of the rod body extending into the recess. Similarly, the insulation adjusting rod is not limited to the insulation screw 34, and may be other rod bodies capable of adjusting the position on the metal cover plate 70, and is not limited herein.

In one embodiment, the metal cover plate 70 is provided with a first metal adjustment bar 81 with an adjustable position, and the first metal adjustment bar 81 extends into the first coupling window 141. The metal cover plate 70 is provided with a second metal adjusting rod 82 with an adjustable position, and the second metal adjusting rod 82 extends into the second coupling window 151. The metal cover plate 70 is provided with a third metal adjusting bar 83 with an adjustable position, and the third metal adjusting bar 83 extends into the third coupling window 161.

Specifically, the first metal adjustment bar 81 is, for example, a metal screw, and the metal cover 70 is provided with a fourth screw hole 74 corresponding to the first metal adjustment bar 81. In this way, by rotating the first metal adjustment rod 81, the depth of the first metal adjustment rod 81 extending into the first coupling window 141 can be adjusted, so as to adjust the coupling strength at the first coupling window 141. Similarly, the second metal adjusting rod 82 is, for example, a metal screw, and the metal cover plate 70 is provided with a fifth threaded hole 75 corresponding to the second metal adjusting rod 82. Thus, by rotating the second metal adjusting rod 82, the depth of the second metal adjusting rod 82 extending into the second coupling window 151 can be adjusted, so as to adjust the coupling strength at the second coupling window 151. Similarly, the third metal adjusting bar 83 is, for example, a metal screw, and the metal cover plate 70 is provided with a sixth threaded hole 76 corresponding to the third metal adjusting bar 83. In this way, by rotating the third metal adjustment bar 83, the depth of the third metal adjustment bar 83 extending into the third coupling window 161 can be adjusted, so as to adjust the coupling strength at the third coupling window 161.

The first metal adjustment rod 81, the second metal adjustment rod 82, and the third metal adjustment rod 83 are not limited to metal screws, and may be other rods that can adjust the position of the metal cover plate 70.

Further, when the resonator is provided with the fourth recess 17 and the fifth recess 18, accordingly, the third metal resonator 60 is provided similarly to the first metal resonator 20, and will not be described again. The second dielectric resonator 50 is arranged similarly to the first dielectric resonator 30 and will not be described in detail. The fourth wall panel 191 and the sixth wall panel 193 are disposed similarly to the first wall panel 14, and the fifth wall panel 192 is disposed similarly to the second wall panel 15, which will not be described herein.

Referring to fig. 1, in one embodiment, a filter includes the resonator of any of the above embodiments. The filter may be, for example, a multiplexer, a duplexer, a splitter, a combiner, or a tower amplifier, and is not limited herein.

Referring to fig. 1, in one embodiment, a communication device includes the filter of any of the above embodiments. The communication device may be, for example, a communication device such as a mobile phone, a tablet, or a computer, may also be, for example, an exchange, or may also be another electronic device having a communication function, and is not limited herein.

In the filter and communication device, since the center of the projection of the first coupling window 141 on one of the side surfaces of the metal resonator block 10 is located on the side of the first connecting line Z1 away from the second wall plate 15, the center of the projection of the third coupling window 161 on one of the side surfaces of the metal resonator block 10 is located on the side of the second connecting line Z2 away from the second wall plate 15; alternatively, the center of the projection of the first coupling window 141 on one of the side surfaces of the metallic resonator block 10 is located on the side of the first line Z1 close to the second wall plate 15, and the center of the projection of the third coupling window 161 on one of the side surfaces of the metallic resonator block 10 is located on the side of the second line Z2 close to the second wall plate 15. When a filter including the resonant cavity structure is simulated, it can be seen from the simulation chart of fig. 11 that a zero point is generated at the lower end of the pass band (i.e., the left end of the pass band). Therefore, on one hand, the flying rod does not need to be arranged on the second wall plate 15 as in the traditional technology, so that the material cost can be saved, the assembly process can be simplified, and the production efficiency can be improved; on the other hand, the insertion loss is reduced (ohmic loss caused by flying bars is completely avoided by the product due to the reduction of the flying bars); in addition, the reliability in normal temperature and high and low temperature environments is improved (the size of the conventional flying rod is changed due to expansion caused by heat and contraction caused by cold under the high and low temperature environments, and the product performance is adversely affected); in addition, the weight of the product is reduced, and the product competition rate is improved.

Note that the "first metal resonance rod 21 and the second metal resonance rod 41" may be a part of the "metal resonance block 10", that is, the "first metal resonance rod 21 and the second metal resonance rod 41" may be manufactured by integral molding with the "other part of the metal resonance block 10"; the "first metal resonance rod 21 and the second metal resonance rod 41" may be manufactured separately and then combined with the "other parts of the metal resonance block 10" to form a single body. As shown in fig. 2, in one embodiment, the "first metal resonant rod 21 and the" second metal resonant rod 41 "are integrally formed as a part of the" metal resonant block 10 ".

Specifically, the metal cover plate 70 is detachably attached to the metal resonator block 10 by, for example, a mounting member.

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

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

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

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

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

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

Claims

1. A resonant cavity structure, comprising:

the metal resonator block is provided with a first concave part, a second concave part and a third concave part which are arranged adjacent to each other in pairs on the surface of one side of the metal resonator block; the first concave part is used for installing a first metal resonator, the second concave part is used for installing a first dielectric resonator, and the third concave part is used for installing a second metal resonator; wherein the wall plate between the first recess and the second recess that separates the first recess from the second recess is a first wall plate, the wall plate between the first recess and the third recess that separates the first recess from the third recess is a second wall plate, and the wall plate between the second recess and the third recess that separates the second recess from the third recess is a third wall plate; a first coupling window is arranged on the first wall plate, a second coupling window is arranged on the second wall plate, and a third coupling window is arranged on the third wall plate; defining a first line Z1 as a line connecting a center of projection of the first metal resonator on one of the side surfaces of the metal resonator block and a center of projection of the first dielectric resonator on one of the side surfaces of the metal resonator block; defining a line connecting the center of projection of the second metal resonator on one side surface of the metal resonator block and the center of projection of the first dielectric resonator on one side surface of the metal resonator block as a second line Z2;

the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first connecting line Z1 away from the second wall plate, and the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second connecting line Z2 away from the second wall plate; alternatively, the projection of the first coupling window on one of the side surfaces of the metal resonator block is located on the side of the first line Z1 close to the second wall plate, and the projection of the third coupling window on one of the side surfaces of the metal resonator block is located on the side of the second line Z2 close to the second wall plate.

2. The resonator structure according to claim 1, wherein a fourth concave portion and a fifth concave portion are provided on one side surface of the metal resonator block; the second concave part, the third concave part and the fourth concave part are arranged adjacent to each other in pairs; the third concave part, the fourth concave part and the fifth concave part are arranged adjacent to each other in pairs; the fourth recess is used for installing a second dielectric resonator, and the fifth recess is used for installing a third metal resonator;

defining a third line Z3 as a line connecting the center of projection of the second metal resonator on one of the side surfaces of the metal resonator block and the center of projection of the second dielectric resonator on one of the side surfaces of the metal resonator block; defining a fourth connection line Z4 as a connection line between the center of projection of the third metal resonator on one of the side surfaces of the metal resonator block and the center of projection of the second dielectric resonator on one of the side surfaces of the metal resonator block;

3. The resonator structure according to claim 2, characterized in that the projection of said fourth coupling window on one of the lateral surfaces of said metal resonator block is located on the side of said third line Z3 remote from said fifth wall plate, and the projection of said sixth coupling window on one of the lateral surfaces of said metal resonator block is located on the side of said fourth line Z4 remote from said fifth wall plate; alternatively, the projection of said fourth coupling window on one of the lateral surfaces of said metallic resonator block is located on the side of said third line Z3 close to said fifth wall panel, and the projection of said sixth coupling window on one of the lateral surfaces of said metallic resonator block is located on the side of said fourth line Z4 close to said fifth wall panel.

4. The resonant cavity structure of claim 1, wherein the first wall plate extends to a bottom wall of the first recess, a distance from a top wall of the first wall plate to the bottom wall of the first recess is h1, a depth of the first recess is S1, 1/2S1 ≦ h1 ≦ S1; the panel surface of the first wallboard is provided with a first boss, the first boss extends to the bottom wall of the first concave part, the distance from the top wall of the first boss to the bottom wall of the first concave part is h2, and h2 ≦ h 1.

5. The resonator structure of claim 1, further comprising a signal input and a signal output disposed on the metal resonator block.

6. A resonator comprising the resonator structure according to any one of claims 1 to 5, and further comprising a first metal resonator, a first dielectric resonator, and a second metal resonator; the first metal resonator is disposed in the first recess, the first dielectric resonator is disposed in the second recess, and the second metal resonator is disposed in the third recess.

7. The resonator according to claim 6, further comprising a metal cover plate covering one side surface of the metal resonator block; the first metal resonator comprises a first metal resonance rod arranged in the first concave part and a first metal tuning rod arranged on the metal cover plate in a position-adjustable manner; the first dielectric resonator comprises a first dielectric resonance rod arranged in the second concave part and a first dielectric tuning disc arranged on the metal cover plate in a position-adjustable manner; the second metal resonator comprises a second metal resonance rod arranged in the third concave part and a second metal tuning rod arranged on the metal cover plate in a position-adjustable mode.

8. The resonator according to claim 7, wherein said first dielectric resonator further comprises an insulating support structure provided on a bottom wall of said second recess, said first dielectric resonator rod being mounted on said insulating support structure; the first medium tuning disc is arranged on the metal cover plate in a position-adjustable mode through an insulating adjusting rod.

9. The resonator according to claim 7, wherein a first metal adjusting rod with adjustable position is arranged on the metal cover plate, and the first metal adjusting rod extends into the first coupling window; a second metal adjusting rod with an adjustable position is arranged on the metal cover plate and extends into the second coupling window; and a third metal adjusting rod with an adjustable position is arranged on the metal cover plate and extends into the third coupling window.

10. A filter, characterized in that it comprises a resonator according to any one of claims 6 to 9.

11. A communication device, characterized in that the communication device comprises a filter according to claim 10.