CN204205010U - Cavity body filter - Google Patents
Cavity body filter Download PDFInfo
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- CN204205010U CN204205010U CN201420677113.0U CN201420677113U CN204205010U CN 204205010 U CN204205010 U CN 204205010U CN 201420677113 U CN201420677113 U CN 201420677113U CN 204205010 U CN204205010 U CN 204205010U
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Abstract
The utility model provides a kind of cavity body filter.Cavity body filter comprises: resonant cavity; Metal oscillator, the bottom of metal oscillator is connected with the first chamber wall of resonant cavity; Medium oscillator, medium oscillator is tubular and has intermediate cavity, and at least part of metal oscillator is arranged in the intermediate cavity of medium oscillator, and medium oscillator has the part on the top exceeding metal oscillator.Application the technical solution of the utility model, is provided with for the metal oscillator of resonance TEM ripple and the medium oscillator for resonance TM ripple, is conducive to the resonance frequency reducing filter.
Description
Technical field
The utility model relates to filter field, in particular to a kind of cavity body filter.
Background technology
TM mould dielectric filter is an important component part in radio-frequency filter industry.Fig. 1 shows a kind of traditional TM mould dielectric filter of prior art, and TM mould dielectric filter comprises resonant cavity 1 ', tuning screw 4 ', ceramic vibrator 3 ' and metab 2 '.Metab 2 ' is circular flat bottom, for supporting ceramic vibrator 3 ' and ceramic vibrator 3 ' being fixed on the chamber wall of resonant cavity 1 '.The degree of depth that the dielectric constant of the size of resonant cavity 1 ', the size of ceramic vibrator 3 ', ceramic vibrator 3 ', tuning screw 4 ' enter in chamber determines frequency range.
The oscillator of the TM mode filter of prior art is medium oscillator, traditional medium oscillator filter advantage is that Q value is higher than metal oscillator filter, but shortcoming is to realize low frequency, then the volume ratio metal oscillator of medium oscillator is large, and the secondary mould of medium oscillator filter is closer from basic mode.
The oscillator of the TEM mode filter of prior art is metal oscillator, and traditional metal oscillator filter can realize the resonance of lower frequency, and being easy to realization has miniaturization, but Q value is lower than TM mode filter, and the secondary mould of metal oscillator filter is distant.
Utility model content
Main purpose of the present utility model is to provide a kind of cavity body filter that can reduce resonance frequency.
To achieve these goals, according to an aspect of the present utility model, provide a kind of cavity body filter, cavity body filter comprises: resonant cavity; Metal oscillator, the bottom of metal oscillator is connected with the first chamber wall of resonant cavity; Medium oscillator, medium oscillator is tubular and has intermediate cavity, and at least part of metal oscillator is arranged in the intermediate cavity of medium oscillator, and medium oscillator has the part on the top exceeding metal oscillator.
Further, the metal oscillator of part is arranged in the intermediate cavity of medium oscillator, and the outer peripheral face of the metal oscillator of part is connected with the perisporium of the intermediate cavity of medium oscillator.
Further, metal oscillator is arranged in the intermediate cavity of medium oscillator.
Further, the bottom of medium oscillator is connected with the first chamber wall.
Further, cavity body filter also comprises basal disc, and basal disc is arranged on the bottom of metal oscillator, and basal disc is connected with the first chamber wall.
Further, basal disc comprises the flange that the radial direction along metal oscillator extends away from metal oscillator, medium oscillator on the end face of flange, form metal connecting layer, be formed with weld material layer between metal connecting layer and flange.
Further, the material of metal connecting layer is silver.
Further, basal disc weld with the first chamber wall, bonding or be connected by screw.
Further, the outer peripheral face of metal oscillator is connected with the perisporium of the intermediate cavity of medium oscillator.
Further, articulamentum is formed between the perisporium of the outer peripheral face of metal oscillator and the intermediate cavity of medium oscillator.
Further, articulamentum is layer of adhesive material.
Further, the material of metal oscillator is brass, easily car iron or aluminium.
Further, metal oscillator comprises the matrix formed by dielectric material and the metal cladding covered on the outer peripheral face of matrix.
Further, metal cladding is silver layer or layers of copper.
Further, the material of medium oscillator is pottery.
Further, cavity body filter also comprises tuning screw, and tuning screw is arranged on the second chamber wall relative with the first chamber wall, and tuning screw is arranged movably along the direction perpendicular to the second chamber wall.
Further, tuning screw has the position that part is positioned at the intermediate cavity of medium oscillator.
Further, metal oscillator is provided with the centre bore coaxial with medium oscillator.
Further, tuning screw has the position that part is positioned at the centre bore of metal oscillator.
Application the technical solution of the utility model, is provided with for the metal oscillator of resonance TEM ripple and the medium oscillator for resonance TM ripple, is conducive to the resonance frequency reducing filter.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of the TM mode filter of prior art;
Fig. 2 shows the structural representation of the cavity body filter of the utility model first embodiment;
Fig. 3 shows the structural representation of the cavity body filter of the utility model second embodiment.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
1, resonant cavity; 2, metal oscillator; 3, medium oscillator; 4, tuning screw; 5, basal disc.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
Embodiment one
As shown in Figure 2, the cavity body filter of the utility model first embodiment comprises: resonant cavity 1; Metal oscillator 2, metal oscillator 2 is for resonance TEM ripple, and the bottom of metal oscillator 2 is connected with the first chamber wall of resonant cavity 1; Medium oscillator 3, medium oscillator 3 is for resonance TM ripple, and medium oscillator 3 is in tubular, and at least part of metal oscillator 2 is arranged in the intermediate cavity of medium oscillator 3, and medium oscillator 3 has the part on the top exceeding metal oscillator 2.
Be provided with in the resonant cavity 1 of the cavity body filter of the present embodiment for the metal oscillator 2 of resonance TEM ripple and the medium oscillator 3 for resonance TM ripple, be conducive to the resonance frequency reducing filter.
Further, the inside of cavity body filter is provided with metal oscillator 2 and medium oscillator 3, effectively reduces the resonance frequency of resonant cavity, therefore, when preparing the resonant cavity of identical resonance frequency, cavity volume can significantly reduce, thus the volume and weight of cavity body filter can be reduced therefore.
In the present embodiment, described metal oscillator 2 is arranged in the intermediate cavity of described medium oscillator 3.
In the present embodiment, cavity body filter is basal disc 5 also, and basal disc 5 is arranged on the bottom of metal oscillator 2, and basal disc 5 is connected with the first chamber wall.
Preferably, metal oscillator 2 and basal disc 5 are wholely set, and arrange basal disc 5 in the bottom of metal oscillator 2, form the structure being similar to ring flange, utilize basal disc 5 to connect the first chamber wall of resonant cavity 1, are conducive to the steadiness that raising metal oscillator 2 is connected with the first chamber wall.
Preferably, basal disc 5 weld with the first chamber wall, bonding or be connected by screw.
Basal disc 5 comprises the flange that the radial direction along metal oscillator 2 extends away from metal oscillator 2, medium oscillator 3 on the end face of flange, form metal connecting layer, be formed with weld material layer between metal connecting layer and flange.
Medium oscillator 3 is set in the periphery of metal oscillator 2, and the upper surface of medium oscillator 3 is higher than the upper surface of metal oscillator 2, and the lower surface of medium oscillator 3 is connected to the flange place of the upper surface of basal disc 5, and the lower surface of basal disc 5 is connected with the first chamber wall of resonant cavity 1.
Preferably, the material of metal connecting layer is silver.Argent adopts co-firing technology to be formed on the end face of medium oscillator 3.
Preferably, the upper surface of the mode connection metal articulamentum of brazing and the flange of basal disc can be adopted, thus realize the connection of medium oscillator 3 and metal oscillator 2.Solder for weld metal material layer and flange can be silver or tin.
In the present embodiment, the outer peripheral face of metal oscillator 2 is connected with the perisporium of the intermediate cavity of medium oscillator.Articulamentum is formed between the perisporium of the outer peripheral face of metal oscillator 2 and the intermediate cavity of medium oscillator 3.
In the present embodiment, outer peripheral face and the perisporium of the intermediate cavity of medium oscillator 3 of metal oscillator 2 adopt bonding mode to be connected, and the perisporium of the outer peripheral face of metal oscillator 2 and the intermediate cavity of medium oscillator 3 forms layer of adhesive material.
Preferably, the outer peripheral face of mode connection metal oscillator 2 and the intermediate cavity of medium oscillator 3 of soldering can also be adopted.
In this is preferably implemented, the bottom of metal oscillator 2 is connected with the first chamber wall, and medium oscillator 3 is set in outside metal oscillator and the bottom of medium oscillator 3 and is connected with the first chamber wall.Can form metal structure in the bottom of medium oscillator 3, metal structure welds to realize being fixedly connected with of medium oscillator 3 and resonant cavity with the first chamber wall, also can adopt bonding method connecting media oscillator 3 and the first chamber wall.
In another preferred embodiment of the present utility model, the metal oscillator 2 of part is arranged in the intermediate cavity of medium oscillator 3, and the outer peripheral face of the metal oscillator 2 of part is connected with the perisporium of the intermediate cavity of medium oscillator 3.In the preferred embodiment, the connection of the outer peripheral face of the metal oscillator 2 that relying part is divided and the intermediate cavity of medium oscillator 3, is fixed on medium oscillator 3 in resonant cavity.
In the present embodiment, the material of metal oscillator 2 is brass, easily car iron or aluminium.
Also can preferably, metal oscillator 2 comprises the matrix formed by dielectric material and the metal cladding covered on the outer peripheral face of matrix.Metal cladding can be preferably silver layer or layers of copper.Silver layer or layers of copper can adopt electroplating technique to be formed on the outer peripheral face of matrix.
In the present embodiment, the material of medium oscillator 3 is pottery.Medium oscillator 3 material preferential oxidation aluminium pottery, zirconia ceramics, barium titanate ceramic or calcium titanate pottery.
In the present embodiment, cavity body filter also comprises tuning screw 4, and tuning screw 4 is arranged on the second chamber wall relative with the first chamber wall, and tuning screw 4 is arranged movably along the direction perpendicular to the second chamber wall.
Tuning screw 4 has the position that part is positioned at the intermediate cavity of medium oscillator 3.Screwed in the size in the centre bore of medium oscillator 3 by change tuning screw 4, the resonance frequency of filter can be regulated.
Preferably, state on metal oscillator 2 and be provided with the centre bore coaxial with medium oscillator 3.Tuning screw 4 has the position that part is positioned at the centre bore of metal oscillator 2.Screwed in the size of the centre bore of metal oscillator 2 by adjustment tuning screw 4, the resonance frequency of filter can be changed further, be conducive to the frequency range improving filter.
Embodiment two
As shown in Figure 3, in the present embodiment, cavity body filter comprises: resonant cavity 1; Metal oscillator 2, metal oscillator 2 is for resonance TEM ripple, and the bottom of metal oscillator 2 is connected with the first chamber wall of resonant cavity 1; Medium oscillator 3, medium oscillator 3 is for resonance TM ripple, and medium oscillator 3 is in tubular, and at least part of metal oscillator 2 is arranged in the intermediate cavity of medium oscillator 3, and medium oscillator 3 has the part on the top exceeding metal oscillator 2.
Preferably, metal oscillator 2 is arranged in the intermediate cavity of medium oscillator 3, and the bottom of medium oscillator 3 is connected with the first chamber wall.
Metal oscillator 2 can be connected by screw, mode that is bonding or welding is fixed on the first chamber wall, and medium oscillator 3 can adopt mode that is bonding or welding to be fixed on the first chamber wall.
Be provided with in the resonant cavity 1 of the cavity body filter of the present embodiment for the metal oscillator 2 of resonance TEM ripple and the medium oscillator 3 for resonance TM ripple, be conducive to the resonance frequency reducing filter.
Further, the inside of cavity body filter is provided with metal oscillator 2 and medium oscillator 3, effectively reduces the resonance frequency of resonant cavity, therefore, when preparing the resonant cavity of identical resonance frequency, cavity volume can significantly reduce, thus the volume and weight of cavity body filter can be reduced therefore.
In the present embodiment, the material of metal oscillator 2 is brass, easily car iron or aluminium.
In the present embodiment, the material of medium oscillator 3 is pottery.Medium oscillator 3 material preferential oxidation aluminium pottery, zirconia ceramics, barium titanate ceramic or calcium titanate pottery.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (19)
1. a cavity body filter, is characterized in that, described cavity body filter comprises:
Resonant cavity (1);
Metal oscillator (2), the bottom of described metal oscillator (2) is connected with the first chamber wall of described resonant cavity (1);
Medium oscillator (3), described medium oscillator (3) is in tubular and have intermediate cavity, at least part of described metal oscillator (2) is arranged in the intermediate cavity of described medium oscillator (3), and described medium oscillator (3) has the part on the top exceeding described metal oscillator (2).
2. cavity body filter according to claim 1, it is characterized in that, the described metal oscillator (2) of part is arranged in the described intermediate cavity of described medium oscillator (3), and the outer peripheral face of the metal oscillator (2) of described part is connected with the perisporium of the described intermediate cavity of described medium oscillator (3).
3. cavity body filter according to claim 1, is characterized in that, described metal oscillator (2) is arranged in the described intermediate cavity of described medium oscillator (3).
4. cavity body filter according to claim 3, is characterized in that, the bottom of described medium oscillator (3) is connected with described first chamber wall.
5. cavity body filter according to claim 3, it is characterized in that, described cavity body filter also comprises basal disc (5), and described basal disc (5) is arranged on the bottom of described metal oscillator (2), and described basal disc (5) is connected with described first chamber wall.
6. cavity body filter according to claim 5, it is characterized in that, described basal disc (5) comprises the flange that the radial direction along described metal oscillator (2) extends away from described metal oscillator (2), described medium oscillator (3) on the end face of described flange, form metal connecting layer, be formed with weld material layer between described metal connecting layer and described flange.
7. cavity body filter according to claim 6, is characterized in that, the material of described metal connecting layer is silver.
8. cavity body filter according to claim 5, is characterized in that, described basal disc (5) welds with described first chamber wall, bonding or be connected by screw.
9. cavity body filter according to claim 5, is characterized in that, the outer peripheral face of described metal oscillator (2) is connected with the perisporium of the described intermediate cavity of described medium oscillator (3).
10. cavity body filter according to claim 9, is characterized in that, is formed with articulamentum between the perisporium of the described outer peripheral face of described metal oscillator (2) and the described intermediate cavity of described medium oscillator (3).
11. cavity body filters according to claim 10, is characterized in that, described articulamentum is layer of adhesive material.
12. cavity body filters according to claim 1, is characterized in that, the material of described metal oscillator (2) is brass, Yi Chetie or aluminium.
13. cavity body filters according to claim 1, is characterized in that, described metal oscillator (2) comprises the matrix formed by dielectric material and the metal cladding covered on the outer peripheral face of described matrix.
14. cavity body filters according to claim 13, is characterized in that, described metal cladding is silver layer or layers of copper.
15. cavity body filters according to claim 1, is characterized in that, the material of described medium oscillator (3) is pottery.
16. cavity body filters according to claim 1, it is characterized in that, described cavity body filter also comprises tuning screw (4), described tuning screw (4) is arranged on the second chamber wall relative with described first chamber wall, and described tuning screw (4) is arranged movably along the direction perpendicular to described second chamber wall.
17. cavity body filters according to claim 16, is characterized in that, described tuning screw (4) has the position that part is positioned at the described intermediate cavity of described medium oscillator (3).
18. cavity body filters according to claim 17, is characterized in that, described metal oscillator (2) are provided with the centre bore coaxial with described medium oscillator (3).
19. cavity body filters according to claim 18, is characterized in that, tuning screw (4) has the position that part is positioned at the centre bore of described metal oscillator (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420677113.0U CN204205010U (en) | 2014-11-12 | 2014-11-12 | Cavity body filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420677113.0U CN204205010U (en) | 2014-11-12 | 2014-11-12 | Cavity body filter |
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| Publication Number | Publication Date |
|---|---|
| CN204205010U true CN204205010U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420677113.0U Active CN204205010U (en) | 2014-11-12 | 2014-11-12 | Cavity body filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018119825A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳市大富科技股份有限公司 | Tem mode filter and communication device |
| CN108258371A (en) * | 2018-02-05 | 2018-07-06 | 华南理工大学 | A kind of three mode filter of medium based on capacitive load and aperture coupled |
| CN113228411A (en) * | 2018-12-28 | 2021-08-06 | 华为技术有限公司 | TM mode filter and manufacturing method thereof |
-
2014
- 2014-11-12 CN CN201420677113.0U patent/CN204205010U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018119825A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳市大富科技股份有限公司 | Tem mode filter and communication device |
| CN109219904A (en) * | 2016-12-29 | 2019-01-15 | 深圳市大富科技股份有限公司 | A kind of TEM mode filter and communication equipment |
| CN108258371A (en) * | 2018-02-05 | 2018-07-06 | 华南理工大学 | A kind of three mode filter of medium based on capacitive load and aperture coupled |
| CN108258371B (en) * | 2018-02-05 | 2020-02-18 | 华南理工大学 | Dielectric three-mode filter based on capacitive loading and slotting coupling |
| CN113228411A (en) * | 2018-12-28 | 2021-08-06 | 华为技术有限公司 | TM mode filter and manufacturing method thereof |
| CN113228411B (en) * | 2018-12-28 | 2023-04-04 | 华为技术有限公司 | TM mode filter and manufacturing method thereof |
| US11990661B2 (en) | 2018-12-28 | 2024-05-21 | Huawei Technologies Co., Ltd. | TM mode filter and method for manufacturing TM mode filter |
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