CN203134948U - Cavity filter - Google Patents
Cavity filter Download PDFInfo
- Publication number
- CN203134948U CN203134948U CN 201320060086 CN201320060086U CN203134948U CN 203134948 U CN203134948 U CN 203134948U CN 201320060086 CN201320060086 CN 201320060086 CN 201320060086 U CN201320060086 U CN 201320060086U CN 203134948 U CN203134948 U CN 203134948U
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- China
- Prior art keywords
- cavity
- signal transmission
- transmission pole
- fixed block
- body filter
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Abstract
The utility model discloses a cavity filter, comprising a cavity and a cover plate covered on the cavity, wherein the cavity comprises an upper chamber and a lower chamber isolated by an isolation rib, a boss with a height identical to the height of the sidewall of the upper chamber is arranged in the upper chamber, a through hole communicating with the lower chamber is arranged in the boss, a signal transmission rod used for transmitting signals outside the upper chamber and the lower chamber is arranged in the through hole, and a medium fixed block is arranged between the signal transmission rod and the through hole. The cavity filter provided by the utility model can effectively complete inputting or outputting of signals, and the signal transmission rod has the advantages of a simple structure, a short processing period, effective reduction in cost due to usage of low-price materials and easy, firm and reliable installation.
Description
Technical field
The utility model relates to the communication radio frequency field, is specifically related to a kind of cavity body filter.
Background technology
Cavity body filter is widely used in the communications field as a kind of frequency selection device, finishes in the base station that signal transmits and receives in communication system, and filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
At present, adopt coaxial cavity filter in the base station system mostly.In the filter design, the overall dimension of filter, for example length generally has clear and definite restriction.In some cases, the length of filter and widely all be limited, but short transverse is propagation direction.In order to be issued to the filter index at this restricted size condition, need to adopt double-deck row chamber usually, namely filter cavity is divided into two-layer up and down.Signal demand in lower floor's cavity is from the input and output of filter upper surface, and traditional way adopts connector and the common export structure of forming of cable to transfer out outside the filter epicoele with the signal with cavity of resorption.
In research and practice process to prior art, inventor of the present utility model finds, uses the common export structure cost height of forming of connector and cable, and the process-cycle is long, waste resource, assembling complexity etc.
The utility model content
In order to solve the common export structure complexity of forming of connector of the prior art and cable, the problem that cost is high, the utility model provides the cavity body filter of letter of a kind of export structure.
The cavity body filter that the utility model provides, comprise that cavity and lid are located at the cover plate on the cavity, described cavity comprises epicoele and the cavity of resorption of keeping apart with isolation bar, be provided with the boss contour with the epicoele sidewall in the described epicoele, be provided with the through hole that is communicated with cavity of resorption in the described boss, be provided with the signal transmission pole for transmission signal between outside cavity of resorption and epicoele cavity in the described through hole, be provided with the medium fixed block between described signal transmission pole and the described through hole.
Further, the through hole on the described boss is stepped hole, and described medium fixed block is provided with flange, and described medium fixed block flange is positioned on the step of described boss stepped hole.
Further, also be milled with the flat position that prevents that the medium fixed block from moving radially on the flange of described medium fixed block.
Further, be provided with stepped hole in the described medium fixed block, described signal transmission pole is provided with flange, and described signal transmission pole flange is positioned on the step of described medium fixed block stepped hole.
Further, also be milled with the flat position that prevents that the medium fixed block from moving radially on the flange of described signal transmission pole.
Further, also be provided with the anti-axially movable hangnail of stop signal transmission pole on the described signal transmission pole.
Further, be covered with upper cover plate on the described epicoele, be provided with the medium pad between described upper cover plate and the described signal transmission pole.
Further, the mobile jib of described signal transmission pole is the cylindrical, massive metallic conductor.
Further, described signal transmission pole is copper, and the surface is silver coated.
Further, the end that described signal transmission pole is positioned at cavity of resorption is connected with brace or connecting line, and the other end of described brace or connecting line is connected with resonant cavity.
Perhaps, the lower cover of described cavity of resorption is provided with erecting bed, and the end that described signal transmission pole is positioned at cavity of resorption is threaded with described erecting bed.
A kind of cavity body filter that the utility model provides, have epicoele and cavity of resorption, adopt the signal transmission pole that the cavity of resorption signal is derived or imported from epicoele, can effectively finish input or the output of signal, the structure of signal transmission pole is simpler, and the process-cycle is short, and material is cheap, can effectively reduce cost, and signal transmission pole of the present utility model installation is simple and easy, and solid and reliable.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the generalized section of a kind of cavity body filter among the utility model embodiment;
Fig. 2 is the structural representation of a kind of signal transmission pole among the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one,
A kind of cavity body filter, as shown in Figure 1, comprise that cavity and lid are located at the cover plate on the cavity, cavity comprises epicoele 101 and the cavity of resorption 102 of keeping apart with isolation bar, be provided with the boss 110 contour with the epicoele sidewall in the epicoele 101, be provided with the through hole that is communicated with cavity of resorption 102 in the boss 110, be provided with the signal transmission pole 130 for transmission signal between outside cavity of resorption 101 and epicoele 102 cavitys in the through hole, be provided with medium fixed block 120 between signal transmission pole 130 and the through hole.
The part filter can be satisfied for the requirement on the radio-frequency (RF) index in the row chamber in upper and lower chamber, at the filter with epicoele and cavity of resorption cloth cavity configuration, if the radiofrequency signal in two chambeies all requires one side input or output from cavity, be the end face output from epicoele in the present embodiment, the signal of cavity of resorption 102 need pass through epicoele 101 so, and employing signalization transmission pole 130 between epicoele 101 and cavity of resorption 102 outputs to the cavity of resorption signal outside the chamber in the present embodiment.In transmission course, reveal in epicoele for fear of signal, the passage that passes at epicoele signal transmission pole 130 arranges boss 110 with isolation signals, for fear of signal transmission pole conduction, medium fixed block 120 is set outside the signal transmission pole, and can plays the effect of fixed signal transmission pole.
Concrete, the through hole on the boss 110 is stepped hole, and medium fixed block 120 is provided with flange 121, and medium fixed block flange 121 is positioned on the step of boss stepped hole.Further, the flange of medium fixed block is milled with the flat position that prevents that the medium fixed block from moving radially.The through hole cross section is circular, and the cross section of medium fixed block also is circular.
Be provided with stepped hole in the medium fixed block 120, signal transmission pole 130 passes the stepped hole of medium fixed block 120, and signal transmission pole 130 is provided with flange 132, and signal transmission pole flange 132 is positioned on the step of medium fixed block 120 stepped holes.With reference to figure 2, the mobile jib 131 of signal transmission pole is the cylindrical, massive metallic conductor, and material can be copper, and the surface is silver coated, and the processing of this kind signal transmission body is simpler, and material is cheap, can effectively reduce cost.For anti-stop signal transmission pole moves radially, its flange 132 is provided with flat position 134, can be one, also can be a plurality of.For anti-stop signal transmission pole moves axially, at its mobile jib 131 hangnail 133 is set.The signal transmission pole of this kind structure is installed more convenient, and solid and reliable.
In order to conduct electricity between anti-stop signal transmission pole and the cover plate, between the upper cover plate 150 of epicoele and signal transmission pole 130, to fill up and establish medium pad 140.
As shown in Figure 1, the end that the signal transmission pole is positioned at cavity of resorption 102 in the present embodiment is connected with brace 160, can be to be threaded, be that the end that the signal transmission pole is positioned at cavity of resorption arranges screwed hole, be fixed on the signal transmission pole 130 with the end of metallic screw 170 with brace 160, silver layer has been crossed on metallic screw 170 surfaces.Can also directly brace be welded on the end that the signal transmission pole is positioned at cavity of resorption.The other end of brace is connected with the resonant cavity of cavity of resorption, thereby finishes the output function of cavity of resorption signal.
The end that the signal transmission pole is positioned at cavity of resorption also can be connected with connecting line, can take welding manner, and the other end of connecting line links to each other with the cavity of resorption resonant cavity.
Another kind of execution mode as the cavity of resorption signal being directed at the signal transmission pole can also arrange erecting bed on the lower cover in the present embodiment, and erecting bed is provided with screwed hole, and the end that the signal transmission pole is positioned at cavity of resorption is threaded with erecting bed.
The cavity of resorption signal transfers to signal transmission body can multiple connected mode, does not all constitute restriction of the present utility model.
Epicoele in the present embodiment and cavity of resorption are comparatively speaking, and under the prerequisite with one side, the signal transmission pole can all not constitute restriction of the present utility model from cavity of resorption or the output of other cavity faces yet at the input/output port that guarantees double-layer cavity.
More than cavity body filter that the utility model embodiment is provided be described in detail, wherein:
A kind of cavity body filter with upper and lower chamber that the utility model provides, adopt the signal transmission pole that the cavity of resorption signal is derived or imported from epicoele, can effectively finish input or the output of signal, the structure of signal transmission pole is simpler, process-cycle is short, and material is cheap, can effectively reduce cost, and signal transmission pole of the present utility model is installed simple and easy, and solid and reliable.
Used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (11)
1. cavity body filter, comprise that cavity and lid are located at the cover plate on the cavity, it is characterized in that, described cavity comprises epicoele and the cavity of resorption of keeping apart with isolation bar, be provided with the boss contour with the epicoele sidewall in the described epicoele, be provided with the through hole that is communicated with cavity of resorption in the described boss, be provided with the signal transmission pole for transmission signal between outside cavity of resorption and epicoele cavity in the described through hole, be provided with the medium fixed block between described signal transmission pole and the described through hole.
2. cavity body filter according to claim 1 is characterized in that, the through hole on the described boss is stepped hole, and described medium fixed block is provided with flange, and described medium fixed block flange is positioned on the step of described boss stepped hole.
3. cavity body filter according to claim 2 is characterized in that, also is milled with the flat position that prevents that the medium fixed block from moving radially on the flange of described medium fixed block.
4. cavity body filter according to claim 2 is characterized in that, is provided with stepped hole in the described medium fixed block, and described signal transmission pole is provided with flange, and described signal transmission pole flange is positioned on the step of described medium fixed block stepped hole.
5. cavity body filter according to claim 4 is characterized in that, also is milled with the flat position that prevents that the medium fixed block from moving radially on the flange of described signal transmission pole.
6. cavity body filter according to claim 4 is characterized in that, also is provided with the anti-axially movable hangnail of stop signal transmission pole on the described signal transmission pole.
7. according to any described cavity body filter of claim 1 ~ 6, it is characterized in that, be covered with upper cover plate on the described epicoele, be provided with the medium pad between described upper cover plate and the described signal transmission pole.
8. according to any described cavity body filter of claim 1 ~ 6, it is characterized in that the mobile jib of described signal transmission pole is the cylindrical, massive metallic conductor.
9. according to any described cavity body filter of claim 1 ~ 6, it is characterized in that described signal transmission pole is copper, and the surface is silver coated.
10. according to any described cavity body filter of claim 1 ~ 6, it is characterized in that the end that described signal transmission pole is positioned at cavity of resorption is connected with brace or connecting line, the other end of described brace or connecting line is connected with resonant cavity.
11. according to any described cavity body filter of claim 1 ~ 6, it is characterized in that the lower cover of described cavity of resorption is provided with erecting bed, the end that described signal transmission pole is positioned at cavity of resorption is threaded with described erecting bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320060086 CN203134948U (en) | 2013-02-02 | 2013-02-02 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320060086 CN203134948U (en) | 2013-02-02 | 2013-02-02 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203134948U true CN203134948U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320060086 Expired - Fee Related CN203134948U (en) | 2013-02-02 | 2013-02-02 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203134948U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545588A (en) * | 2013-10-24 | 2014-01-29 | 江苏贝孚德通讯科技股份有限公司 | Half-wavelength shared-cavity metal resonator |
-
2013
- 2013-02-02 CN CN 201320060086 patent/CN203134948U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545588A (en) * | 2013-10-24 | 2014-01-29 | 江苏贝孚德通讯科技股份有限公司 | Half-wavelength shared-cavity metal resonator |
| CN103545588B (en) * | 2013-10-24 | 2015-04-29 | 江苏贝孚德通讯科技股份有限公司 | Half-wavelength shared-cavity metal resonator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20180202 |