CN111987395A - Monomer multimode ceramic filter - Google Patents
Monomer multimode ceramic filter Download PDFInfo
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- CN111987395A CN111987395A CN202010989032.4A CN202010989032A CN111987395A CN 111987395 A CN111987395 A CN 111987395A CN 202010989032 A CN202010989032 A CN 202010989032A CN 111987395 A CN111987395 A CN 111987395A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 30
- 239000000178 monomer Substances 0.000 title abstract description 7
- 230000008878 coupling Effects 0.000 claims abstract description 101
- 238000010168 coupling process Methods 0.000 claims abstract description 101
- 238000005859 coupling reaction Methods 0.000 claims abstract description 101
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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Abstract
The application discloses monomer multimode ceramic filter, through set up first single mode resonator on the wave filter body at the monolithic structure, first multimode resonator, second single mode resonator, third single mode resonator, second multimode resonator and fourth single mode resonator, coupling structure through tailorring formation between two liang of syntonizers is connected, thereby form a plurality of syntonizers and set up, need not through splicing mode such as welding or pasting, thereby the stability of structure has been improved, greatly reduce the volume of wave filter, and simultaneously, coupling precision and yield are improved, the technological requirement has been reduced. In addition, through the combination of the single mode resonator and the multimode resonator, the whole insertion loss of the filter is reduced, and the filter has a high Q value.
Description
Technical Field
The application relates to the technical field of filters, in particular to a monomer multimode ceramic filter.
Background
In the field of communications, ceramic dielectric filters have become an application hotspot due to their excellent characteristics, and at present, there are two main modes of ceramic dielectric filters in terms of morphology: one is a single ceramic filter, which realizes miniaturization by adopting single-cavity deep loading, but the deep loading can cause the Q value of a single cavity to be lower, the insertion loss of the filter is large, and meanwhile, the width dimension is larger; in addition, the filter adopts a multilayer mode, a plurality of pieces of ceramics are adopted for the filter and are connected in a welding mode, and due to the fact that the mode needs multilayer welding, cavity coupling between each single piece of ceramics of the filter is difficult to control accurately, structural stability is affected, cost is increased, and meanwhile the height size of the filter is large.
In order to solve the problem of low Q value, the multi-mode filter is the preferred solution, but the multi-mode filter needs a plurality of ceramic splicing, and a multi-layer or multi-block welding mode is generally adopted. Also, the coupling of the cavity between each single ceramic is difficult to control precisely, the structural stability is poor, and the cost is increased.
Disclosure of Invention
The application provides a monomer multimode ceramic filter for solve the technical problems that the coupling precision and the structural stability of the existing multimode filter are poor and the Q value is low.
In view of the above, the present application provides a monolithic multimode ceramic filter, comprising: a filter body;
the filter body is provided with a first single-mode resonator, a first multimode resonator, a second single-mode resonator, a third single-mode resonator, a second multimode resonator and a fourth single-mode resonator, and a metal conducting layer is coated on the surface of the filter body;
the surfaces, close to each other, of the first single-mode resonator and the first multimode resonator are connected through a first coupling structure, and the first single-mode resonator, the first multimode resonator and the first coupling structure are integrally formed;
the surfaces, close to each other, of the first multimode resonator and the second single-mode resonator are connected through a second coupling structure, and the first multimode resonator, the second single-mode resonator and the second coupling structure are integrally formed;
the surfaces, close to each other, of the second single-mode resonator and the third single-mode resonator are connected through a third coupling structure, and the second single-mode resonator, the third single-mode resonator and the third coupling structure are integrally formed;
the surfaces, close to each other, of the third single-mode resonator and the second multimode resonator are connected through a fourth coupling structure, and the third single-mode resonator, the second multimode resonator and the fourth coupling structure are integrally formed;
the surfaces, close to each other, of the second multimode resonator and the fourth single-mode resonator are connected through a fifth coupling structure, and the second multimode resonator, the fourth single-mode resonator and the fifth coupling structure are integrally formed;
the first coupling structure, the second coupling structure, the third coupling structure, the fourth coupling structure and the fifth coupling structure are all structures formed by cutting.
Preferably, an end face of the first single-mode resonator, which is far away from the first coupling structure, is provided with a first joint.
Preferably, an end face, away from the fifth coupling structure, of the fourth single-mode resonator is provided with a second joint.
Preferably, the first joint and the second joint are both blind holes, and the first joint and the second joint are both externally connected with coaxial joints for leading in or leading out signals.
Preferably, the volume of the first multimode resonator is larger than the volume of any one of the first, second, third and fourth single-mode resonators;
the volume of the second multimode resonator is larger than the volume of any one of the first single-mode resonator, the second single-mode resonator, the third single-mode resonator, and the fourth single-mode resonator.
Preferably, the first coupling structure is a square structure or a rectangular structure, and the cross-sectional dimension of the first coupling structure is less than one third of the cross-sectional dimension of the filter body.
Preferably, the second coupling structure includes a first rectangular body, a second rectangular body and a third rectangular body, the first rectangular body is connected between corresponding edges of the upper ends of the first multimode resonator and the second single-mode resonator, the second rectangular body is connected between corresponding edges of the upper ends of the first multimode resonator and the second single-mode resonator, and the third rectangular body is connected between corresponding edges of the lower ends of the first multimode resonator and the second single-mode resonator;
the fourth coupling structure comprises a fourth cuboid, a fifth cuboid and a sixth cuboid, the fourth cuboid is connected between corresponding edges of the upper ends of the third single-mode resonator and the second multimode resonator, the fifth cuboid is connected between corresponding edges of the upper ends of the third single-mode resonator and the second multimode resonator, and the sixth cuboid is connected between corresponding edges of the lower ends of the third single-mode resonator and the second multimode resonator;
the cross-sectional dimensions of the first cuboid, the second cuboid, the third cuboid, the fourth cuboid, the fifth cuboid and the sixth cuboid are all less than one third of the cross-sectional dimension of the filter body.
Preferably, the third coupling structure includes a seventh rectangular body, an eighth rectangular body and a ninth rectangular body, and the seventh rectangular body, the eighth rectangular body and the ninth rectangular body are respectively connected between any three edges and corners corresponding to the second single-mode resonator and the third single-mode resonator;
the cross-sectional dimensions of the seventh cuboid, the eighth cuboid and the ninth cuboid are all less than one third of the cross-sectional dimension of the filter body.
Preferably, the fifth coupling structure is a cross-shaped structure, and the cross-sectional dimension of the fifth coupling structure is less than one third of the cross-sectional dimension of the filter body.
Preferably, the metal conductive layer is one or two combination of silver and copper.
According to the technical scheme, the embodiment of the application has the following advantages:
the embodiment of the application provides a pair of monomer multimode ceramic filter, through set up first single mode resonator on the wave filter body at the monolithic structure, first multimode resonator, the second single mode resonator, the third single mode resonator, second multimode resonator and fourth single mode resonator, coupling structure through tailorring formation between two liang of syntonizers is connected, thereby form integrated into one piece setting with a plurality of syntonizers, need not through concatenation modes such as welding or pasting, thereby the stability of structure has been improved, greatly reduce the volume of wave filter, and simultaneously, coupling precision and yield are improved, the technological requirement has been reduced. In addition, through the combination of the single mode resonator and the multimode resonator, the whole insertion loss of the filter is reduced, and the filter has a high Q value.
Drawings
Fig. 1 is a schematic perspective view of a monolithic multimode ceramic filter according to an embodiment of the present disclosure;
fig. 2 is a schematic front view of a monolithic multimode ceramic filter according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
For easy understanding, referring to fig. 1 to 2, the present application provides a monolithic multi-mode ceramic filter, including: a filter body 1;
the filter body 1 is provided with a first single-mode resonator 20, a first multimode resonator 30, a second single-mode resonator 21, a third single-mode resonator 22, a second multimode resonator 31 and a fourth single-mode resonator 23, and the surface of the filter body 1 is coated with a metal conducting layer;
the surfaces of the first single-mode resonator 20 and the first multimode resonator 30 which are close to each other are connected through a first coupling structure 40, and the first single-mode resonator 20, the first multimode resonator 30 and the first coupling structure 40 are integrally formed;
the surfaces close to each other between the first multimode resonator 30 and the second single-mode resonator 21 are connected through a second coupling structure 41, and the first multimode resonator 30, the second single-mode resonator 21 and the second coupling structure 41 are integrally formed;
the surfaces of the second single-mode resonator 21 and the third single-mode resonator 22 which are close to each other are connected through a third coupling structure 42, and the second single-mode resonator 21, the third single-mode resonator 22 and the third coupling structure 42 are integrally formed;
the surfaces of the third single-mode resonator 22 and the second multimode resonator 31 which are close to each other are connected through a fourth coupling structure 43, and the third single-mode resonator 22, the second multimode resonator 31 and the fourth coupling structure 43 are integrally formed;
the surfaces of the second multimode resonator 31 and the fourth single-mode resonator 23 which are close to each other are connected through a fifth coupling structure 44, and the second multimode resonator 31, the fourth single-mode resonator 23 and the fifth coupling structure 44 are integrally formed;
the first coupling structure 40, the second coupling structure 41, the third coupling structure 42, the fourth coupling structure 43, and the fifth coupling structure 44 are all structures formed by cutting.
It can be understood that, in this embodiment, through set up first single mode resonator 20, first multimode resonator 30, second single mode resonator 21, third single mode resonator 22, second multimode resonator 31 and fourth single mode resonator 23 on the filter body 1 of monomer structure, coupling structure through cutting out formation between two liang of resonators is connected, thereby form integrated into one piece setting with a plurality of resonators, need not through concatenation modes such as welding or pasting, thereby the stability of structure has been improved, greatly reduce the volume of filter, and simultaneously, coupling precision and yield are improved, the technological requirement has been reduced. In addition, through the combination of the single mode resonator and the multimode resonator, the whole insertion loss of the filter is reduced, and the filter has a high Q value.
The above is an embodiment of a monolithic multimode ceramic filter provided herein, and the following is another embodiment of a monolithic multimode ceramic filter provided herein.
For easy understanding, referring to fig. 1 to 2, the present application provides a monolithic multi-mode ceramic filter, comprising: a filter body 1;
the filter body 1 is provided with a first single-mode resonator 20, a first multimode resonator 30, a second single-mode resonator 21, a third single-mode resonator 22, a second multimode resonator 31 and a fourth single-mode resonator 23, and the surface of the filter body 1 is coated with a metal conducting layer;
the surfaces of the first single-mode resonator 20 and the first multimode resonator 30 which are close to each other are connected through a first coupling structure 40, and the first single-mode resonator 20, the first multimode resonator 30 and the first coupling structure 40 are integrally formed;
the surfaces close to each other between the first multimode resonator 30 and the second single-mode resonator 21 are connected through a second coupling structure 41, and the first multimode resonator 30, the second single-mode resonator 21 and the second coupling structure 41 are integrally formed;
the surfaces of the second single-mode resonator 21 and the third single-mode resonator 22 which are close to each other are connected through a third coupling structure 42, and the second single-mode resonator 21, the third single-mode resonator 22 and the third coupling structure 42 are integrally formed;
the surfaces of the third single-mode resonator 22 and the second multimode resonator 31 which are close to each other are connected through a fourth coupling structure 43, and the third single-mode resonator 22, the second multimode resonator 31 and the fourth coupling structure 43 are integrally formed;
the surfaces of the second multimode resonator 31 and the fourth single-mode resonator 23 which are close to each other are connected through a fifth coupling structure 44, and the second multimode resonator 31, the fourth single-mode resonator 23 and the fifth coupling structure 44 are integrally formed;
the first coupling structure 40, the second coupling structure 41, the third coupling structure 42, the fourth coupling structure 43, and the fifth coupling structure 44 are all structures formed by cutting.
Further, the end face of the first single-mode resonator 20 remote from the first coupling structure 40 is provided with a first joint 50.
Further, the end face of the fourth single-mode resonator 23 remote from the fifth coupling structure 44 is provided with a second joint 51.
Further, the first connector 50 and the second connector 51 are both blind holes, and the first connector 50 and the second connector 51 are both externally connected with coaxial connectors for leading in or leading out signals.
It can be understood that the filter is to receive the communication signal through the first connector 50 or the second connector 51, and to derive the communication signal from the second connector 51 or the first connector 50 after passing through the plurality of resonators in sequence through coupling.
In the present embodiment, the first joint 50 and the second joint 51 are formed by cutting, and the side length of the cross section is 1-2 mm.
Further, the volume of the first multimode resonator 30 is larger than the volume of any one of the first, second, third and fourth single- mode resonators 20, 21, 22 and 23;
the second multimode resonator 31 has a volume larger than that of any one of the first, second, third and fourth single- mode resonators 20, 21, 22 and 23.
It will be appreciated that in this embodiment the single mode resonator is the common frequency cavity of the multimode resonator.
Further, the first coupling structure 40 is a square structure or a rectangular structure, and the cross-sectional dimension of the first coupling structure 40 is smaller than one third of the cross-sectional dimension of the filter body 1.
In the present embodiment, the first coupling structure 40 is disposed at the center, and the cross-sectional dimension is larger than 2 × 2mm, so as to reduce the volume of the filter and make the structure more stable.
Further, the second coupling structure 41 includes a first rectangular body 411, a second rectangular body 412 and a third rectangular body 413, the first rectangular body 411 is connected between the corresponding edges of the upper ends of the first multimode resonator 30 and the second single-mode resonator 21, the second rectangular body 412 is connected between the corresponding edges of the upper ends of the first multimode resonator 30 and the second single-mode resonator 21, and the third rectangular body 413 is connected between the corresponding edges of the lower ends of the first multimode resonator 30 and the second single-mode resonator 21;
the fourth coupling structure 43 includes a fourth rectangular body 431, a fifth rectangular body 432 and a sixth rectangular body 433, the fourth rectangular body 431 is connected between the corresponding first edges of the upper ends of the third single-mode resonator 22 and the second multimode resonator 31, the fifth rectangular body 432 is connected between the corresponding second edges of the upper ends of the third single-mode resonator 22 and the second multimode resonator 31, and the sixth rectangular body 433 is connected between the corresponding edges of the lower ends of the third single-mode resonator 22 and the second multimode resonator 31;
the cross-sectional dimensions of the first cuboid 411, the second cuboid 412, the third cuboid 413, the fourth cuboid 431, the fifth cuboid 432 and the sixth cuboid 433 are all less than one third of the cross-sectional dimension of the filter body 1.
In the present embodiment, the cross-sectional dimensions of the first rectangular body 411, the second rectangular body 412, the third rectangular body 413, the fourth rectangular body 431, the fifth rectangular body 432 and the sixth rectangular body 433 are greater than 2 × 2mm, so as to reduce the volume of the filter and make the structure more stable.
Further, the third coupling structure 42 includes a seventh rectangular body 421, an eighth rectangular body 422, and a ninth rectangular body 423, and the seventh rectangular body 421, the eighth rectangular body 422, and the ninth rectangular body 423 are respectively connected between any three corners corresponding to the second single-mode resonator 21 and the third single-mode resonator 22;
the sectional dimensions of the seventh rectangular body 421, the eighth rectangular body 422, and the ninth rectangular body 423 are each less than one third of the sectional dimension of the filter body 1.
In the present embodiment, the cross-sectional dimensions of the seventh rectangular body 421, the eighth rectangular body 422, and the ninth rectangular body 423 are larger than 2 × 2mm, thereby reducing the volume of the filter and making the structure more stable.
Further, the fifth coupling structure 44 is a cross-shaped structure, and the cross-sectional dimension of the fifth coupling structure 44 is smaller than one third of the cross-sectional dimension of the filter body 1.
In this embodiment, the fifth coupling structure 44 has a width greater than 1mm, thereby reducing the filter volume and making the structure more stable.
Further, the metal conductive layer is one or two of silver and copper.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A monolithic multimode ceramic filter, comprising: a filter body;
the filter body is provided with a first single-mode resonator, a first multimode resonator, a second single-mode resonator, a third single-mode resonator, a second multimode resonator and a fourth single-mode resonator, and a metal conducting layer is coated on the surface of the filter body;
the surfaces, close to each other, of the first single-mode resonator and the first multimode resonator are connected through a first coupling structure, and the first single-mode resonator, the first multimode resonator and the first coupling structure are integrally formed;
the surfaces, close to each other, of the first multimode resonator and the second single-mode resonator are connected through a second coupling structure, and the first multimode resonator, the second single-mode resonator and the second coupling structure are integrally formed;
the surfaces, close to each other, of the second single-mode resonator and the third single-mode resonator are connected through a third coupling structure, and the second single-mode resonator, the third single-mode resonator and the third coupling structure are integrally formed;
the surfaces, close to each other, of the third single-mode resonator and the second multimode resonator are connected through a fourth coupling structure, and the third single-mode resonator, the second multimode resonator and the fourth coupling structure are integrally formed;
the surfaces, close to each other, of the second multimode resonator and the fourth single-mode resonator are connected through a fifth coupling structure, and the second multimode resonator, the fourth single-mode resonator and the fifth coupling structure are integrally formed;
the first coupling structure, the second coupling structure, the third coupling structure, the fourth coupling structure and the fifth coupling structure are all structures formed by cutting.
2. The monolithic multi-mode ceramic filter of claim 1, wherein an end face of the first single-mode resonator remote from the first coupling structure is provided with a first joint.
3. The monolithic multimode ceramic filter of claim 2, wherein an end face of the fourth single-mode resonator remote from the fifth coupling structure is provided with a second joint.
4. The monolithic multi-mode ceramic filter of claim 3, wherein the first connector and the second connector are blind holes, and the first connector and the second connector are externally connected with coaxial connectors for leading in or leading out signals.
5. The monolithic multimode ceramic filter of claim 1, wherein the first multimode resonator has a volume larger than any of the first, second, third and fourth single-mode resonators;
the volume of the second multimode resonator is larger than the volume of any one of the first single-mode resonator, the second single-mode resonator, the third single-mode resonator, and the fourth single-mode resonator.
6. The monolithic multimode ceramic filter of claim 1, wherein the first coupling structure is a square or rectangular structure, the first coupling structure having a cross-sectional dimension that is less than one-third of the cross-sectional dimension of the filter body.
7. The monolithic multimode ceramic filter of claim 1, wherein the second coupling structure comprises a first rectangular body connected between corresponding corners at the upper ends of the first multimode resonator and the second single-mode resonator, a second rectangular body connected between corresponding corners at the upper ends of the first multimode resonator and the second single-mode resonator, and a third rectangular body connected between corresponding corners at the lower ends of the first multimode resonator and the second single-mode resonator;
the fourth coupling structure comprises a fourth cuboid, a fifth cuboid and a sixth cuboid, the fourth cuboid is connected between corresponding edges of the upper ends of the third single-mode resonator and the second multimode resonator, the fifth cuboid is connected between corresponding edges of the upper ends of the third single-mode resonator and the second multimode resonator, and the sixth cuboid is connected between corresponding edges of the lower ends of the third single-mode resonator and the second multimode resonator;
the cross-sectional dimensions of the first cuboid, the second cuboid, the third cuboid, the fourth cuboid, the fifth cuboid and the sixth cuboid are all less than one third of the cross-sectional dimension of the filter body.
8. The monolithic multimode ceramic filter of claim 1 or 7, wherein the third coupling structure comprises a seventh cuboid, an eighth cuboid, and a ninth cuboid connected between any three corners of the second single-mode resonator and the third single-mode resonator, respectively;
the cross-sectional dimensions of the seventh cuboid, the eighth cuboid and the ninth cuboid are all less than one third of the cross-sectional dimension of the filter body.
9. The monolithic multimode ceramic filter of claim 1 wherein the fifth coupling structure is a cross-shaped structure having a cross-sectional dimension less than one-third of the cross-sectional dimension of the filter body.
10. The monolithic multimode ceramic filter of claim 1, wherein the metallic conductive layer is one or a combination of silver and copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010989032.4A CN111987395B (en) | 2020-09-18 | 2020-09-18 | Single multimode ceramic filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010989032.4A CN111987395B (en) | 2020-09-18 | 2020-09-18 | Single multimode ceramic filter |
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| CN111987395A true CN111987395A (en) | 2020-11-24 |
| CN111987395B CN111987395B (en) | 2024-05-07 |
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| CN202010989032.4A Active CN111987395B (en) | 2020-09-18 | 2020-09-18 | Single multimode ceramic filter |
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|---|---|---|---|---|
| CN112467323A (en) * | 2020-11-27 | 2021-03-09 | 南宁国人射频通信有限公司 | Air suspension line dual-mode filter |
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| CN111987395B (en) | 2024-05-07 |
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