CN104716410A - Cavity filter - Google Patents
Cavity filter Download PDFInfo
- Publication number
- CN104716410A CN104716410A CN201310719847.0A CN201310719847A CN104716410A CN 104716410 A CN104716410 A CN 104716410A CN 201310719847 A CN201310719847 A CN 201310719847A CN 104716410 A CN104716410 A CN 104716410A
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- CN
- China
- Prior art keywords
- cavity
- cover plate
- filter
- resonant rod
- boss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The embodiment of the invention provides a cavity filter. The cavity filter comprises a cavity and a cover plate arranged on the cavity in a covering mode, a resonance rod and an annular body are arranged in the cavity, a boss is arranged at the bottom of the cavity, the resonance rod is fixed to the boss at the bottom of the cavity through a fixing screw, the annular body is assembled on the lower surface of the cover plate, and a capacitor is formed by the surface of the annular body and the surface of the resonance rod; a threaded hole is formed in the cover plate, and the cover plate further comprises a tuning threaded rod matched with the threaded hole and penetrating in the annular body. The cavity filter can meet the frequency-selecting requirement of a low-frequency filter, the cavity filter of the structure increases capacitance on one hand and is more convenient to assemble on the other hand, it is avoided that due to an electric discharge phenomenon, sparks are generated to cause a short-circuit, and therefore the technical index of the cavity filter is improved.
Description
Technical field
The present invention relates to a kind of filter, be in particular a kind of cavity body filter.
Background technology
Cavity body filter is widely used in the communications field as a kind of frequency-selecting equipment.In prior art, the tuning screw that cavity body filter comprises cavity resonant bar, cover plate and is located in cover plate, in low band filter design, in order to reduce resonance frequency, in the structure of resonant rod end loading capacitance disk to increase electric capacity, can reduce frequency usually.Because the diameter affecting electric capacity disk by cavity size can not be too large, the more low frequency needs of filter can only be met by increasing a side capacitive on the basis of electric capacity disk again, waste material.
Summary of the invention
In order to solve in prior art the problem that there is resonant rod and the one-body molded existing waste of material of capacitance disk, the invention provides the employing of a kind of cavity body filter and ring bodies is on the cover board set to realize the low frequency requirement of cavity body filter.
Embodiments provide a kind of cavity body filter, comprise cavity and be covered on the cover plate on cavity, resonant rod and ring bodies is provided with in described cavity, cavity bottom is provided with boss, described resonant rod is fixed on cavity bottom boss by fixed screw, described boss height is not more than 1mm, and its cross-sectional sizes is identical with resonant rod; Be provided with counterbore bottom described resonant rod, the counterbore degree of depth is not more than 0.8mm; Described ring bodies is assemblied in described cover plate lower surface, and the surface of described ring bodies and the surface of described resonant rod form electric capacity.
Described cover plate is provided with screwed hole, and described cover plate also comprises the tuning screw for regulating filter parameter closed with corresponding threaded holes.Described tuning screw is arranged in described ring bodies, by the object regulating the tuning screw depth stretched in cavity to reach fine setting.
beneficial effect:
The cavity body filter that the embodiment of the present invention provides and communication equipment, adopt the mode that ring bodies or projection are set on the cover plate or cavity of cavity body filter, the cavity body filter of this kind of structure adds the capacitance in cavity on the one hand, reduces frequency, can meet the demand of low frequency filtering, on the other hand, assemble more convenient, avoid electric discharge phenomena occur, produce spark, cause short circuit, thus improve the technical indicator of product.
Accompanying drawing explanation
Fig. 1 is overall 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.
Embodiments provide a kind of cavity body filter, the cover plate 3 comprising cavity 1 and be located on cavity 1, resonant rod 2 is provided with in described cavity 1, boss 8 is provided with bottom cavity 1, described resonant rod 2 is fixed on cavity 1 bottom boss 8 by fixed screw 9, described boss 8 is highly not more than 1mm, and its cross-sectional sizes is identical with resonant rod 2; Be provided with counterbore 7 bottom described resonant rod 2, counterbore 7 degree of depth is not more than 0.8mm; Described cover plate 3 lower surface is provided with ring bodies 4, and the surface of described ring bodies 4 and the surface of described resonant rod 2 form electric capacity.
Described cover plate 3 is provided with screwed hole 5, and described cover plate 3 also comprises the tuning screw 6 for regulating filter parameter matched with screwed hole 5.Described tuning screw 6 to be arranged in described ring bodies 4, by the object regulating tuning screw 6 depth stretched in cavity to reach fine setting.
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 (4)
1. embodiments provide a kind of cavity body filter, comprise cavity and be covered on the cover plate on cavity, resonant rod and ring bodies is provided with in described cavity, cavity bottom is provided with boss, described resonant rod is fixed on cavity bottom boss by fixed screw, described ring bodies is assemblied in described cover plate lower surface, and the surface of described ring bodies and the surface of described resonant rod form electric capacity.
2. a kind of cavity body filter according to claim 1, it is characterized in that: described boss height is not more than 1mm, and its cross-sectional sizes is identical with resonant rod.
3. a kind of cavity body filter according to claim 1, it is characterized in that: be provided with counterbore bottom described resonant rod, the counterbore degree of depth is not more than 0.8mm.
4. a kind of cavity body filter according to claim 1, is characterized in that: described cover plate is provided with screwed hole, described cover plate also comprises the tuning screw closed with corresponding threaded holes; Described tuning screw is arranged in described ring bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310719847.0A CN104716410A (en) | 2013-12-17 | 2013-12-17 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310719847.0A CN104716410A (en) | 2013-12-17 | 2013-12-17 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104716410A true CN104716410A (en) | 2015-06-17 |
Family
ID=53415520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310719847.0A Pending CN104716410A (en) | 2013-12-17 | 2013-12-17 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104716410A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106207340A (en) * | 2016-08-31 | 2016-12-07 | 安徽赛福电子有限公司 | A kind of adjustable cavity body filter |
| CN110534854A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of Novel Filter frequency reducing structure |
-
2013
- 2013-12-17 CN CN201310719847.0A patent/CN104716410A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106207340A (en) * | 2016-08-31 | 2016-12-07 | 安徽赛福电子有限公司 | A kind of adjustable cavity body filter |
| CN110534854A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of Novel Filter frequency reducing structure |
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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 |