CN104701592A - TM mode medium cavity filter - Google Patents
TM mode medium cavity filter Download PDFInfo
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- CN104701592A CN104701592A CN201510150584.5A CN201510150584A CN104701592A CN 104701592 A CN104701592 A CN 104701592A CN 201510150584 A CN201510150584 A CN 201510150584A CN 104701592 A CN104701592 A CN 104701592A
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- Prior art keywords
- medium
- metal
- cavity
- metal cover
- becket
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Abstract
The invention discloses a TM mode medium cavity filter. The TM mode medium cavity filter comprises metal cavity walls and a metal cover plate, wherein the metal cavity walls and the metal cover plate form an inner cavity, a medium is arranged in the middle portion of the inner cavity, and the upper end and the lower end of the medium are fixed on the bottom of the metal cover plate and the metal cavity respectively; a metal ring is arranged at the side of the medium, and the metal ring is connected to the metal cover plate on the upper portion of the inner cavity through a medium screw. The TM mode medium cavity filter solves the problems that an existing debugging device is complex and the frequency change is irreversible, the frequency debugging scope of the TM mode medium cavity filter is enabled to be larger, and the debugging process is simple, repeat and reversible.
Description
Technical field:
The invention belongs to passive antenna feeder device, be specifically related to a kind of TM mould dielectric cavity fluid filter.
Background technology:
Cavity body filter is as the significant element in wireless transmitting-receiving equipments, be used in widely in wireless transmitting-receiving equipments, because TM mode resonator has high q-factor, high power ability to bear, volume is little, so the TM mode media cavity body filter be made up of TM dielectric resonator to have volume little, passband internal loss is little, bears the advantages such as power is large and widely applies in the filter of wireless telecommunications system.
Medium due to TM dielectric resonator needs two ends metallic ground simultaneously, and common way is that dielectric posts is welded on metallic cavity and metal cover board, this mounting means relative complex, also brings frequency debugging scope too small, the shortcomings such as debugging is complicated.Existing a kind of adjustment method: the shape (size) changing dielectric resonator carrys out regulating frequency, require high to debugging acid, operating process is complicated, such adjustment method easily causes dielectric rupture, and belong to irreversible process owing to changing dielectric resonator shape, debug process medium frequency can only towards the direction monotone variation raised, bring very big inconvenience to debugging filter, in debug process, just again must change dielectric resonator once debugging error, and debugging scope is relatively little; Another kind of adjustment method adds metal adjustment screw in the middle of the medium of the hollow of resonator, it can realize reversible debug process, but the resonator medium of hollow can bring bulky shortcoming again, and the quality factor of resonator affects greatly by metallic screw, power bearing ability also can correspondingly decline.
Summary of the invention:
The object of the invention is to solve the problem, propose a kind of frequency debugging scope large, debug process repeats reversible TM mould dielectric cavity fluid filter.
The technical solution used in the present invention is: a kind of TM mould dielectric cavity fluid filter, comprise wire chamber body wall and metal cover board, described wire chamber body wall and metal cover board form inner chamber, portion is provided with medium in the lumen, and the two ends up and down of described medium are separately fixed at bottom metal cover board and metallic cavity; Be provided with a becket on medium side, described becket is connected on the metal cover board on inner chamber top by medium screw.
Further, described becket can replace with sheet metal.
Further, the axial rotary of described medium screw is parallel with the axis of dielectric resonator medium.
Further, described becket or sheet metal have high conductivity, or surface is coated with the metal material of high conductivity.
The beneficial effect that the present invention produces is: utilize and be fixed on bottom rotatable medium screw by becket, and medium screw is fixed on the cavity of resonator, drive becket to rotate the magnetic distribution changing TM mould dielectric resonator inside by rotating media screw, reach the object regulating resonant frequency.It is large that this device has frequency debugging scope, and debug process repeats reversible, effectively avoids the defect in existing TM dielectric resonator adjustment method.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of becket 90-degree rotation in the present invention;
Fig. 3 is three-dimensional cutaway view of the present invention.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, a kind of TM mould dielectric cavity fluid filter, comprises a dielectric resonator and the becket 3 being arranged on dielectric resonator inside.Wherein, dielectric resonator is made up of wire chamber body wall 5 and metal cover board 1, and metal cover board 1 welds with wire chamber body wall 5, forms a closed inner chamber, is welded with medium 4 between metal cover board 1 and intracavity bottom.Be provided with becket 3 on the side of medium 4, becket 3 is arranged on metal cover board 1 by medium screw 2.Wherein, becket 3 has high conductivity, or is coated with the metal material of high conductivity on its surface, as silver, copper etc. promote the quality factor of TM mould resonator.
As shown in Figure 2, by by medium screw 2 rotating metallic ring 3, change the relative position between dielectric resonator and becket 3, and then change the magnetic distribution in dielectric resonator, thus change the frequency of resonator.
Be below a kind of embodiment of the present invention:
As shown in Figure 3, a kind of TM mould dielectric cavity fluid filter is made up of the TM dielectric resonator of column type and sheet metal, wherein in TM dielectric resonator, the diameter of resonant cavity is 40mm, be highly 35mm, the media diameters of TM resonator is 7mm, dielectric constant is the ceramic material of 36, and resonance frequency is about 2230MHz.By the position of rotation using electromagnetic-field simulation instrument simulation sheet metal different, show that the pass of the anglec of rotation and TM mould resonator resonance frequency is:
| The anglec of rotation (degree) | Resonance frequency (MHz) |
| 0 | 2240 |
| 10 | 2236 |
| 20 | 2234 |
| 30 | 2231 |
| 40 | 2227 |
| 50 | 2223 |
| 60 | 2221 |
| 70 | 2218 |
| 80 | 2217 |
| 90 | 2216 |
The present invention is by installing in dielectric resonator inside the rotatable metallic ring (sheet) be fixed on medium screw additional, make the TM mould dielectric resonator debugging plan of two sides earth simpler, and the volume of resonator can not be increased, and make debugging frequency procedure reversible, avoid the defect of existing TM mould dielectric resonator adjustment method.
Claims (4)
1. a TM mould dielectric cavity fluid filter, it is characterized in that: comprise wire chamber body wall and metal cover board, described wire chamber body wall and metal cover board form inner chamber, and portion is provided with medium in the lumen, and the two ends up and down of described medium are separately fixed at bottom metal cover board and metallic cavity; Be provided with a becket on medium side, described becket is connected on the metal cover board on inner chamber top by medium screw.
2. a kind of TM mould dielectric cavity fluid filter according to claim 1, is characterized in that: described becket can replace with sheet metal.
3. a kind of TM mould dielectric cavity fluid filter according to claim 1, is characterized in that: the axial rotary of described medium screw is parallel with the axis of dielectric resonator medium.
4. a kind of TM mould dielectric cavity fluid filter according to claim 1, it is characterized in that: described becket or sheet metal have high conductivity, or surface is coated with the metal material of high conductivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510150584.5A CN104701592B (en) | 2015-04-01 | 2015-04-01 | TM mould medium cavity body filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510150584.5A CN104701592B (en) | 2015-04-01 | 2015-04-01 | TM mould medium cavity body filters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104701592A true CN104701592A (en) | 2015-06-10 |
| CN104701592B CN104701592B (en) | 2017-11-21 |
Family
ID=53348488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510150584.5A Expired - Fee Related CN104701592B (en) | 2015-04-01 | 2015-04-01 | TM mould medium cavity body filters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104701592B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244575A (en) * | 2015-10-30 | 2016-01-13 | 成都天奥电子股份有限公司 | Novel dielectric cavity filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4639699A (en) * | 1982-10-01 | 1987-01-27 | Murata Manufacturing Co., Ltd. | Dielectric resonator comprising a resonant dielectric pillar mounted in a conductively coated dielectric case |
| US6377132B1 (en) * | 1997-11-05 | 2002-04-23 | Murata Manufacturing Co., Ltd. | Filter, duplexer, and communication device |
| CN101563809A (en) * | 2006-12-22 | 2009-10-21 | 凯瑟雷恩工厂两合公司 | High frequency filter with closed circuit coupling |
| CN103441317A (en) * | 2013-09-05 | 2013-12-11 | 宁波泰立电子科技有限公司 | Cavity filter with rotation adjustable loop |
| CN203747003U (en) * | 2014-01-02 | 2014-07-30 | 广州海格通信集团股份有限公司 | Adjustable cavity filter |
-
2015
- 2015-04-01 CN CN201510150584.5A patent/CN104701592B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4639699A (en) * | 1982-10-01 | 1987-01-27 | Murata Manufacturing Co., Ltd. | Dielectric resonator comprising a resonant dielectric pillar mounted in a conductively coated dielectric case |
| US6377132B1 (en) * | 1997-11-05 | 2002-04-23 | Murata Manufacturing Co., Ltd. | Filter, duplexer, and communication device |
| CN101563809A (en) * | 2006-12-22 | 2009-10-21 | 凯瑟雷恩工厂两合公司 | High frequency filter with closed circuit coupling |
| CN103441317A (en) * | 2013-09-05 | 2013-12-11 | 宁波泰立电子科技有限公司 | Cavity filter with rotation adjustable loop |
| CN203747003U (en) * | 2014-01-02 | 2014-07-30 | 广州海格通信集团股份有限公司 | Adjustable cavity filter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244575A (en) * | 2015-10-30 | 2016-01-13 | 成都天奥电子股份有限公司 | Novel dielectric cavity filter |
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| Publication number | Publication date |
|---|---|
| CN104701592B (en) | 2017-11-21 |
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| C10 | Entry into substantive examination | ||
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| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Liwei Inventor after: Wang Qin Inventor after: Qiao Wentao Inventor after: Chen Liang Inventor after: Zhao Xiaoxia Inventor after: Hou Xiufang Inventor before: Zhang Liwei Inventor before: Wang Qin Inventor before: Qiao Wentao Inventor before: Chen Liang Inventor before: Zhao Xiaoxia Inventor before: Hou Xiufang |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171121 Termination date: 20200401 |
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| CF01 | Termination of patent right due to non-payment of annual fee |