CN111987395B - Single multimode ceramic filter - Google Patents
Single multimode ceramic filter Download PDFInfo
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- CN111987395B CN111987395B CN202010989032.4A CN202010989032A CN111987395B CN 111987395 B CN111987395 B CN 111987395B CN 202010989032 A CN202010989032 A CN 202010989032A CN 111987395 B CN111987395 B CN 111987395B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 28
- 230000008878 coupling Effects 0.000 claims abstract description 102
- 238000010168 coupling process Methods 0.000 claims abstract description 102
- 238000005859 coupling reaction Methods 0.000 claims abstract description 102
- 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
- 238000004891 communication Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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 a single multimode ceramic filter, which is characterized in that 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 are arranged on a filter body of a single structure, and the resonators are connected through a coupling structure formed by cutting, so that a plurality of resonators are integrally formed and arranged without splicing modes such as welding or pasting, the stability of the structure is improved, the volume of the filter is greatly reduced, the coupling precision and the yield are improved, and the technological requirements are reduced. In addition, by combining the single mode resonator and the multimode resonator, the overall insertion loss of the filter is reduced, and the filter has a higher Q value.
Description
Technical Field
The application relates to the technical field of filters, in particular to a single multimode ceramic filter.
Background
In the field of communication, ceramic dielectric filters have become application hot spots due to their excellent characteristics, and at present, there are two main modes of ceramic dielectric filters in morphology: one is a monolithic ceramic filter which is miniaturized by single-cavity deep loading, but has a low single-cavity Q value due to deep loading, large insertion loss of the filter, and large width dimension; in addition, the mainstream mode is a multi-layer mode, the filter is connected by adopting a plurality of ceramics in a welding mode, the cavity coupling between each ceramic block of the filter is difficult to accurately control because the filter needs multi-layer welding, the structural stability is affected, the cost is increased, and meanwhile, the height dimension of the filter is larger.
In order to solve the problem of low Q, a multimode filter is the preferred scheme at present, but the multimode filter needs to splice a plurality of ceramics, and a mode of welding a plurality of layers or a plurality of layers is generally adopted. Also, the cavity coupling between each monolithic ceramic is difficult to precisely control, structural stability is poor, and cost is increased.
Disclosure of Invention
The application provides a single multimode ceramic filter which is used for solving the technical problems of poor coupling precision and structural stability and lower Q value of the existing multimode filter.
In view of this, 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 the surface of the filter body is coated with a metal conducting layer;
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, the end surface of the first single-mode resonator, which is far away from the first coupling structure, is provided with a first joint.
Preferably, the end face of the fourth single-mode resonator, which is far away from the fifth coupling structure, is provided with a second joint.
Preferably, the first connector and the second connector are blind holes, and the first connector and the second connector are externally connected with a coaxial connector for guiding in or guiding out signals.
Preferably, the volume of the first multimode resonator is greater 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;
the second multimode resonator has a volume that is greater 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 edges corresponding to the upper ends of the first multimode resonator and the second single-mode resonator, the second rectangular body is connected between another edge corresponding to the upper ends of the first multimode resonator and the second single-mode resonator, and the third rectangular body is connected between edges corresponding to the lower ends of the first multimode resonator and the second single-mode resonator;
The fourth coupling structure comprises a fourth rectangular body, a fifth rectangular body and a sixth rectangular body, wherein the fourth rectangular body is connected between edges corresponding to the upper ends of the third single-mode resonator and the second multimode resonator, the fifth rectangular body is connected between the third single-mode resonator and another edge corresponding to the upper ends of the second multimode resonator, and the sixth rectangular body is connected between edges corresponding to the lower ends of the third single-mode resonator and the second multimode resonator;
the cross-sectional dimensions of the first rectangular body, the second rectangular body, the third rectangular body, the fourth rectangular body, the fifth rectangular body and the sixth rectangular body are all smaller 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 corresponding to the second single-mode resonator and the third single-mode resonator;
The cross-sectional dimensions of the seventh rectangular body, the eighth rectangular body and the ninth rectangular body are all smaller 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 of silver and copper.
From the above technical solutions, the embodiment of the present application has the following advantages:
According to the single multimode ceramic filter provided by the embodiment of the application, the first single-mode resonator, the first multimode resonator, the second single-mode resonator, the third single-mode resonator, the second multimode resonator and the fourth single-mode resonator are arranged on the filter body with the single structure, and the resonators are connected through the coupling structure formed by cutting, so that the resonators are integrally formed, and the splicing modes such as welding or pasting are not needed, so that the stability of the structure is improved, the size of the filter is greatly reduced, the coupling precision and the yield are improved, and the technological requirements are reduced. In addition, by combining the single mode resonator and the multimode resonator, the overall insertion loss of the filter is reduced, and the filter has a higher Q value.
Drawings
Fig. 1 is a schematic perspective view of a monolithic multimode ceramic filter according to an embodiment of the present application;
fig. 2 is a schematic front view of a monolithic multimode ceramic filter according to an embodiment of the application.
Detailed Description
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the 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 or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, 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 describing embodiments of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in embodiments of the present application will be understood in detail by those of ordinary skill in the art.
For easy understanding, please refer to fig. 1-2, the present application provides a monolithic multimode ceramic filter, which includes: 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 conductive 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 of the first multimode resonator 30 and the second single-mode resonator 21, which are close to each other, 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, which are close to each other, of the second single-mode resonator 21 and the third single-mode resonator 22 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, which are close to each other, of the third single-mode resonator 22 and the second multimode resonator 31 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, which are close to each other, of the second multimode resonator 31 and the fourth single-mode resonator 23 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, by disposing the first single-mode resonator 20, the first multimode resonator 30, the second single-mode resonator 21, the third single-mode resonator 22, the second multimode resonator 31 and the fourth single-mode resonator 23 on the filter body 1 with a single structure, the two resonators are connected by a coupling structure formed by cutting, so that the resonators are integrally formed, and a splicing manner such as welding or pasting is not needed, thereby improving the stability of the structure, greatly reducing the volume of the filter, improving the coupling precision and yield, and reducing the process requirements. In addition, by combining the single mode resonator and the multimode resonator, the overall insertion loss of the filter is reduced, and the filter has a higher Q value.
The above is one embodiment of a monolithic multimode ceramic filter provided by the present application, and the following is another embodiment of a monolithic multimode ceramic filter provided by the present application.
For easy understanding, please refer to fig. 1-2, the present application provides a monolithic multimode ceramic filter, which is characterized by 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 conductive 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 of the first multimode resonator 30 and the second single-mode resonator 21, which are close to each other, 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, which are close to each other, of the second single-mode resonator 21 and the third single-mode resonator 22 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, which are close to each other, of the third single-mode resonator 22 and the second multimode resonator 31 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, which are close to each other, of the second multimode resonator 31 and the fourth single-mode resonator 23 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 blind holes, and the first connector 50 and the second connector 51 are externally connected with a coaxial connector for guiding in or guiding out signals.
It can be understood that the present filter is connected to the communication signal through the first connector 50 or the second connector 51, and the communication signal is led out through the second connector 51 or the first connector 50 after sequentially passing through the plurality of resonators through coupling.
In the present embodiment, the first joint 50 and the second joint 51 are formed by cutting, and at the same time, the cross-sectional side length thereof is 1 to 2mm.
Further, the volume of the first multimode resonator 30 is larger than the volume of any one of the first single-mode resonator 20, the second single-mode resonator 21, the third single-mode resonator 22, and the fourth single-mode resonator 23;
The second multimode resonator 31 has a volume greater than that of any one of the first single-mode resonator 20, the second single-mode resonator 21, the third single-mode resonator 22, and the fourth single-mode resonator 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 provided at a central position and has a cross-sectional size greater than 2×2mm, thereby reducing the filter volume and making 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, where the first rectangular body 411 is connected between edges corresponding to upper ends of the first multimode resonator 30 and the second single-mode resonator 21, the second rectangular body 412 is connected between another edge corresponding to upper ends of the first multimode resonator 30 and the second single-mode resonator 21, and the third rectangular body 413 is connected between edges corresponding to 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 third single-mode resonator 22 and a corner corresponding to the upper end of the second multimode resonator 31, the fifth rectangular body 432 is connected between the third single-mode resonator 22 and another corner corresponding to the upper end of the second multimode resonator 31, and the sixth rectangular body 433 is connected between edges corresponding to the lower ends of the third single-mode resonator 22 and the second multimode resonator 31;
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 all smaller 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 larger than 2×2mm, thereby reducing the filter volume and making 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, where the seventh rectangular body 421, the eighth rectangular body 422, and the ninth rectangular body 423 are respectively connected between any three corresponding edges of the second single-mode resonator 21 and the third single-mode resonator 22;
the cross-sectional dimensions of the seventh rectangular body 421, the eighth rectangular body 422 and the ninth rectangular body 423 are all smaller than one third of the cross-sectional dimension of the filter body 1.
In the present embodiment, the sectional dimensions of the seventh rectangular body 421, the eighth rectangular body 422, and the ninth rectangular body 423 are greater than 2×2mm, thereby reducing the filter volume 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 by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (8)
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 the surface of the filter body is coated with a metal conducting layer;
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 end face, far away from the first coupling structure, of the first single-mode resonator is provided with a first connector;
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 volume of the first 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;
The second multimode resonator has a volume greater 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;
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 multimode ceramic filter of claim 1 wherein an end face of the fourth single-mode resonator remote from the fifth coupling structure is provided with a second joint.
3. The monolithic multimode ceramic filter of claim 2 wherein the first and second connectors are blind holes, and wherein the first and second connectors are coaxial connectors for signal input and output.
4. The monolithic multimode ceramic filter of claim 1 wherein the first coupling structure is a square structure or a 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.
5. The monolithic multimode ceramic filter of claim 1, wherein the second coupling structure comprises a first rectangular body, a second rectangular body and a third rectangular body, the first rectangular body is connected between edges corresponding to upper ends of the first multimode resonator and the second single mode resonator, the second rectangular body is connected between another edge corresponding to upper ends of the first multimode resonator and the second single mode resonator, and the third rectangular body is connected between edges corresponding to lower ends of the first multimode resonator and the second single mode resonator;
The fourth coupling structure comprises a fourth rectangular body, a fifth rectangular body and a sixth rectangular body, wherein the fourth rectangular body is connected between edges corresponding to the upper ends of the third single-mode resonator and the second multimode resonator, the fifth rectangular body is connected between the third single-mode resonator and another edge corresponding to the upper ends of the second multimode resonator, and the sixth rectangular body is connected between edges corresponding to the lower ends of the third single-mode resonator and the second multimode resonator;
the cross-sectional dimensions of the first rectangular body, the second rectangular body, the third rectangular body, the fourth rectangular body, the fifth rectangular body and the sixth rectangular body are all smaller than one third of the cross-sectional dimension of the filter body.
6. The monolithic multimode ceramic filter of claim 1 or 5, wherein the third coupling structure comprises a seventh cuboid, an eighth cuboid and a ninth cuboid, the seventh cuboid, the eighth cuboid and the ninth cuboid being respectively connected between any three corresponding corners of the second single-mode resonator and the third single-mode resonator;
The cross-sectional dimensions of the seventh rectangular body, the eighth rectangular body and the ninth rectangular body are all smaller than one third of the cross-sectional dimension of the filter body.
7. The monolithic multimode ceramic filter of claim 1 wherein the fifth coupling structure is a cross-shaped structure, the fifth coupling structure having a cross-sectional dimension that is less than one third of the cross-sectional dimension of the filter body.
8. The monolithic multimode ceramic filter of claim 1, wherein the metallic conductive layer is one or a combination of silver and copper.
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| Application Number | Priority Date | Filing Date | Title |
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| 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 CN111987395A (en) | 2020-11-24 |
| CN111987395B true CN111987395B (en) | 2024-05-07 |
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| CN112467323B (en) * | 2020-11-27 | 2022-02-01 | 南宁国人射频通信有限公司 | Air suspension line dual-mode filter |
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| CN103972621A (en) * | 2014-04-22 | 2014-08-06 | 深圳三星通信技术研究有限公司 | Mixed dielectric waveguide filter |
| CN104995789A (en) * | 2013-02-21 | 2015-10-21 | 梅萨普莱克斯私人有限公司 | Filter |
| CN104995788A (en) * | 2013-02-21 | 2015-10-21 | 梅萨普莱克斯私人有限公司 | Multi-mode cavity filter |
| CN110112519A (en) * | 2019-06-14 | 2019-08-09 | 广东国华新材料科技股份有限公司 | High bandwidth dielectric waveguide filter |
| CN111384495A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter and communication equipment |
| CN212303855U (en) * | 2020-09-18 | 2021-01-05 | 广东国华新材料科技股份有限公司 | Monomer multimode ceramic filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7356224B2 (en) * | 2001-07-03 | 2008-04-08 | Brown University Research Foundation | Method and apparatus for detecting multiple optical wave lengths |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104995789A (en) * | 2013-02-21 | 2015-10-21 | 梅萨普莱克斯私人有限公司 | Filter |
| CN104995788A (en) * | 2013-02-21 | 2015-10-21 | 梅萨普莱克斯私人有限公司 | Multi-mode cavity filter |
| CN103972621A (en) * | 2014-04-22 | 2014-08-06 | 深圳三星通信技术研究有限公司 | Mixed dielectric waveguide filter |
| CN111384495A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Dielectric filter and communication equipment |
| CN110112519A (en) * | 2019-06-14 | 2019-08-09 | 广东国华新材料科技股份有限公司 | High bandwidth dielectric waveguide filter |
| CN212303855U (en) * | 2020-09-18 | 2021-01-05 | 广东国华新材料科技股份有限公司 | Monomer multimode ceramic filter |
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