CN104716411A - Cavity filter with small size - Google Patents
Cavity filter with small size Download PDFInfo
- Publication number
- CN104716411A CN104716411A CN201310719849.XA CN201310719849A CN104716411A CN 104716411 A CN104716411 A CN 104716411A CN 201310719849 A CN201310719849 A CN 201310719849A CN 104716411 A CN104716411 A CN 104716411A
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- China
- Prior art keywords
- cover plate
- cavity
- resonant
- elastic cover
- filter
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
A cavity filter comprises a cavity body, a resonant bar and a fixed cover plate. The resonance bar is assembled in the cavity body, and the fixed cover plate and the cavity body are sealed to form a resonant cavity; an elastic cover plate is arranged under the fixed cover plate, the elastic cover plate is provided with a tuning device which can enable the elastic cover plate to deform to change the distance between the elastic cover plate and the resonant bar and tune the filter parameters, and the tuning device is assembled outside the resonant cavity; the resonant bar comprises a metal barrel and a media barrel, the outer wall of the media barrel is connected with the metal barrel, the metal barrel is electrically connected with the cavity body, and particularly, the elastic cover plate and the fixed cover plate are fixed on the top of the resonant cavity through screws. According to the cavity filter, the resonant cavity has a quite low resonant frequency, and therefore the size is much smaller than the size of a traditional resonant cavity with the same resonant frequency.
Description
Technical field
The present invention relates to filter field, be in particular the cavity body filter that a kind of volume is little.
Background technology
Cavity body filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.In a base station, filter for selecting signal of communication, the clutter outside filtering communication signal frequency or interference signal.
Cavity body filter needs the requirement being met various radio-frequency (RF) index by debugging.In prior art, be by locking a large amount of adjustment screw on radio-frequency devices cover plate, the quantity of adjustment screw at least tens, hundreds of is thousands of at most, by the difference regulating these adjustment screw to go deep into cavity length, thus reaches the object of debugging radio frequency signal index.Traditional filter construction, comprises resonant rod, cavity, cover plate, tuning screw, cover plate is provided with screwed hole, tuning screw stretches in resonant cavity by the screwed hole on cover plate, forms structure capacitive with resonant rod, regulates filter by the depth regulating tuning screw to screw in cover plate.
But filter ubiquity volume on market is large, and not easily tuning deficiency.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present invention provides a kind of cavity body filter, comprises cavity, resonant rod and securing cover plate, and described resonant rod is assemblied in cavity, and described securing cover plate and cavity are closed and formed resonant cavity; Described securing cover plate has elastic cover plate, elastic cover plate is provided with and makes it that deformation occur, to change the distance between described elastic cover plate and described resonant rod, carry out tuning tuner to the parameter of filter, described tuner is assemblied in outside described resonant cavity.
Concrete, described resonant rod comprises metal cylinder and medium cylinder, and described medium drum outer wall connects with metal cylinder, and described metal cylinder is electrically connected with cavity.
Concrete, described elastic cover plate and securing cover plate are screwed in resonant cavity top.
beneficial effect:
Resonant rod structure of the present invention makes resonant cavity have low-down resonance frequency, thus much smaller with the conventional resonance chamber phase specific volume of identical resonance frequency; Tuning sensitivity of the present invention increases, and the tuning time is shortened greatly, improves production efficiency.
Accompanying drawing explanation
Fig. 1 is corrugated structure schematic diagram of the present invention.
Embodiment
In order to make actualizing technology means of the present invention, creation characteristic, reach object and effect is easy to understand, below in conjunction with concrete diagram, set forth the present invention further.
For solving the problems of the technologies described above, the embodiment of the present invention provides a kind of cavity body filter, and comprise cavity, 1 resonant rod 2 and securing cover plate 3, described resonant rod 2 is assemblied in cavity 1, and described securing cover plate 3 is closed with cavity 1 and formed resonant cavity; Described securing cover plate 3 has elastic cover plate 4, elastic cover plate 4 is provided with and makes it that deformation occur, to change the distance between described elastic cover plate 4 and described resonant rod 2, carry out tuning tuner 5 to the parameter of filter, described tuner 5 is assemblied in outside described resonant cavity.
Concrete, described resonant rod 2 comprises metal cylinder 21 and medium cylinder 22, and described medium cylinder 22 outer wall connects with metal cylinder 21, and described metal cylinder 21 is electrically connected with cavity.
Concrete, described elastic cover plate 4 is screwed in resonant cavity top with securing cover plate 3.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. a cavity body filter, comprises cavity, resonant rod and securing cover plate, it is characterized in that: described resonant rod is assemblied in cavity, and described securing cover plate and cavity are closed and formed resonant cavity; Described securing cover plate has elastic cover plate, elastic cover plate is provided with and makes it that deformation occur, to change the distance between described elastic cover plate and described resonant rod, carry out tuning tuner to the parameter of filter, described tuner is assemblied in outside described resonant cavity.
2. a kind of cavity body filter according to claim 1, is characterized in that: described resonant rod comprises metal cylinder and medium cylinder, and described medium drum outer wall connects with metal cylinder, and described metal cylinder is electrically connected with cavity.
3. a kind of cavity body filter according to claim 1, is characterized in that: described elastic cover plate and securing cover plate are screwed in resonant cavity top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310719849.XA CN104716411A (en) | 2013-12-17 | 2013-12-17 | Cavity filter with small size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310719849.XA CN104716411A (en) | 2013-12-17 | 2013-12-17 | Cavity filter with small size |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104716411A true CN104716411A (en) | 2015-06-17 |
Family
ID=53415521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310719849.XA Pending CN104716411A (en) | 2013-12-17 | 2013-12-17 | Cavity filter with small size |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104716411A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017054474A1 (en) * | 2015-09-28 | 2017-04-06 | 中兴通讯股份有限公司 | Resonance cavity and filter |
| CN107275729A (en) * | 2016-04-08 | 2017-10-20 | 中兴通讯股份有限公司 | The assembly method of resonator, wave filter and resonator |
| WO2018129719A1 (en) * | 2017-01-13 | 2018-07-19 | 华为技术有限公司 | Cavity resonator, filter and communication device |
| WO2019178870A1 (en) * | 2018-03-23 | 2019-09-26 | 深圳市大富科技股份有限公司 | Filter and communication device |
-
2013
- 2013-12-17 CN CN201310719849.XA patent/CN104716411A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017054474A1 (en) * | 2015-09-28 | 2017-04-06 | 中兴通讯股份有限公司 | Resonance cavity and filter |
| CN107275729A (en) * | 2016-04-08 | 2017-10-20 | 中兴通讯股份有限公司 | The assembly method of resonator, wave filter and resonator |
| WO2018129719A1 (en) * | 2017-01-13 | 2018-07-19 | 华为技术有限公司 | Cavity resonator, filter and communication device |
| US10978775B2 (en) | 2017-01-13 | 2021-04-13 | Huawei Technologies Co., Ltd. | Cavity resonator, filter, and communications device |
| WO2019178870A1 (en) * | 2018-03-23 | 2019-09-26 | 深圳市大富科技股份有限公司 | Filter and communication device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150617 |
|
| WD01 | Invention patent application deemed withdrawn after publication |