CN201392877Y - Cavity filter - Google Patents
Cavity filter Download PDFInfo
- Publication number
- CN201392877Y CN201392877Y CN 200920130771 CN200920130771U CN201392877Y CN 201392877 Y CN201392877 Y CN 201392877Y CN 200920130771 CN200920130771 CN 200920130771 CN 200920130771 U CN200920130771 U CN 200920130771U CN 201392877 Y CN201392877 Y CN 201392877Y
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- China
- Prior art keywords
- inwall
- cavity
- transmission line
- port
- body filter
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- 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.)
- Expired - Fee Related
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- 230000005540 biological transmission Effects 0.000 claims abstract description 58
- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 238000005452 bending Methods 0.000 claims description 27
- 238000005304 joining Methods 0.000 claims description 5
- 241000587161 Gomphocarpus Species 0.000 claims description 3
- 238000010923 batch production Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 230000009931 harmful effect Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model relates to a cavity filter which belongs to the field of filters. The cavity filter comprises a cavity, a resonance bar and a transmission line which are arranged in the cavity, and a port which is arranged outside the cavity, wherein an inner core is embedded in the port, the transmission line is connected with the inner core on an inner end of the cavity, the other end is connected with the inner wall of the cavity, and the transmission line and the inner wall of the cavity forms a closed coupling loop. The cavity filter has the characteristics of excellent performance, simple structure and excellent stability, and is suitable for batch production.
Description
[technical field]
The utility model relates to a kind of filter, especially relates to a kind of cavity body filter.
[background technology]
Continuous development along with the Modern wireless communication technical industry, especially all kinds of 3G system is in the rapid expansion of China, the filter demand that various frequency spectrum and bandwidths require is increased sharply day by day, add the trend of miniaturization, especially in coupling coaxial cavity filter, need in limited cavity space, make the coupling loop that is fit to port bandwidth.
Traditional method is that the port excitation directly is welded on the port resonant rod with silver-coated copper wire, perhaps does port with the dielectric support coupling disc near the method for resonant rod.A kind of method can produce harmful effect to resonance frequency before adopting; And adopt a kind of method in back owing to need dielectric support, so stability and consistency in batches all can have different influences.Will certainly cause some unnecessary loss like this, increase cost.
[utility model content]
In view of this, the cavity body filter that is necessary to provide a kind of functional, simple in structure, good stability, suitable batch to produce.
A kind of cavity body filter, comprise cavity, be located at the resonant rod and the transmission line of inside cavity and the port of being located at the cavity outside, be embedded with inner core in the port, described transmission line is connected with inner core at inside cavity one end, one end and cavity inner wall join, and transmission line and cavity inner wall form closed coupling loop.
Owing to be that transmission line is directly linked to each other with cavity inner wall, rather than contact, therefore can not produce harmful effect to resonance frequency with resonant rod; Also not needing increases extra supporting construction, simple in structure; Transmission line has two strong points in addition, has good stability, and after bandwidth was as required determined the shape of transmission line, suitable batch production had good consistency.
In a preferred embodiment, transmission line joins by link and cavity inner wall.
In a preferred embodiment, link is a jump ring, and described jump ring is a screw-like, and its main body periphery is provided with external screw thread, and nail head is provided with blocked hole.When cavity is a machine when adding cavity, the tapping hole on cavity inner wall that suits is connected and fixed transmission line with described jump ring.
In a preferred embodiment, described link also can be the combiner that comprises screw and be located at the boss on the inwall of cavity, and described boss is provided with screwed hole.When cavity is the die casting cavity, suit on cavity inner wall, to establish boss, use described boss and screw fit fixed transmission lines then.
In a preferred embodiment, the position that cavity inner wall is relative with resonant rod is provided with the coupling screw rod.
Wherein, transmission line end in cavity is connected with inner core and extends to the direction of resonant rod perpendicular to the inwall of port homonymy, then to perpendicular to inwall bottom and along away from or near the direction bending of inwall bottom, to joining perpendicular to bending of the inwall direction of port homonymy and the inwall that extends to last and port homonymy, whole transmission line is bent into U-shaped again;
Or transmission line end in cavity is connected with inner core and extend to the direction of resonant rod perpendicular to the inwall of port homonymy, then to direction bending perpendicular to inwall bottom and edge close inwall bottom, and extending to inwall bottom and inwall bottom connection always, whole transmission line is bent into L shaped;
Or transmission line one end is connected with inner core and perpendicular to the inwall of port homonymy, then to bending away from the inwall bottom direction perpendicular to inwall bottom and edge, again to bending perpendicular to the inwall of port homonymy and along inwall direction away from the port homonymy, then to perpendicular to inwall bottom and along near the bending of inwall bottom direction, at last to perpendicular to the inwall of port homonymy and along joining near the inwall direction bending of port homonymy and extension and inwall;
Or transmission line one end is connected with inner core and perpendicular to the inwall of port homonymy, then to bending away from the inwall bottom direction perpendicular to inwall bottom and edge, to perpendicular to the inwall of port homonymy and along inwall direction bending, extend and the inwall bottom connection to the direction bottom inwall then again away from the port homonymy.Thereby make coupling loop have different areas.Therefore can pass through the area of the Adjusting Shape coupling loop of adjustment transmission line, thereby reach the purpose of adjusting port bandwidth.
[description of drawings]
Fig. 1 is the cavity body filter schematic diagram;
Fig. 2 is a kind of form schematic diagram of jump ring;
Fig. 3 is the schematic diagram that another kind of form of jump ring and transmission line join;
Fig. 4 to Fig. 7 is for having the nemaline cavity body filter schematic diagram of different transmission.
Be further detailed below in conjunction with accompanying drawing.
[embodiment]
The utility model adopts the direct and cavity body filter cavity ways of connecting structure coupling loop with transmission line one end.
As shown in Figure 1, be the cavity body filter schematic diagram.This cavity body filter comprises cavity 1, port 2, resonant rod 3 and transmission line 4.Wherein resonant rod 3 is located at cavity 1 inside, and port 2 is located at cavity 1 outside.Port 2 inside are embedded with inner core 7.Transmission line 4 is connected with inner core 7 at cavity 1 an inner end, and the inwall of the other end and cavity 1 joins.By this kind connected mode, transmission line 4 forms closed coupling loop 5 with the inwall of cavity 1.Cavity inner wall and resonant rod 3 relative positions also are provided with coupling screw rod 13.
As shown in Figure 2, be schematic diagram as the jump ring of link 6.Jump ring is substantially the structure of similar screw, and its main body periphery is provided with external screw thread 8, and nail head is provided with blocked hole 9.External screw thread 8 on the jump ring is fixed on the cavity 1 by cooperating with screwed hole on the cavity 1, inserts an end of transmission lines 4 in the blocked hole 9 and with scolding tin transmission line 4 and jump ring is welded.This fixed form machine of being specially adapted to adds cavity.
Except that the mode described in the embodiment 1, the mode of link 6 fixed transmission lines 4 can also be in cavity 1 bottom one boss and tapping hole to be set as present embodiment is described, with screw transmission line 4 is pressed on mode on the boss then.
As shown in Figure 3, be the schematic diagram of the another kind of form of link 6 fixed transmission lines 4.The bottom of cavity 1 is provided with the boss 10 that screwed hole is arranged on it, and screw 11 is pressed on transmission line 4 on the boss 10 by screwing in screwed hole.This fixed form is specially adapted to the die casting cavity.
The shape difference of coupling loop 5, the area difference can make the port bandwidth difference of cavity body filter.
As shown in Figure 4, be the schematic diagram of the cavity body filter of coupling loop 5 with another shape.Link 6 is located at cavity 1 inwall bottom, transmission line 4 one ends are connected with inner core 7 and extend to the direction of resonant rod 3 perpendicular to the inwall of port 2 homonymies, then to direction bending perpendicular to inwall bottom and edge close inwall bottom, and extending to inwall bottom and inwall bottom connection always, whole transmission line 4 is bent into L shaped.
As shown in Figure 5, be the schematic diagram of the cavity body filter of coupling loop 5 with another shape.Link 6 is located at the inwall sidewall of cavity 1, transmission line 4 is connected with inner core 7 and perpendicular to the inwall of port homonymy at cavity 1 an inner end, then to bending perpendicular to the inwall bottom and along direction away from the inwall bottom, again to perpendicular to the inwall of port homonymy and along direction bending away from the inwall of port homonymy, then to direction bending perpendicular to inwall bottom and edge close inwall bottom, at last to perpendicular to the inwall of port homonymy and along near the direction bending of the inwall of port homonymy and be connected by link 6 on the inwall of port homonymy, form and have larger area coupling loop 5.
As shown in Figure 6, be the schematic diagram of the cavity body filter of coupling loop 5 with another shape.Link 6 is located at the inwall sidewall of cavity 1, transmission line 4 one ends are connected with inner core 7 and extend to the direction of resonant rod 3 perpendicular to the inwall of port 2 homonymies, then to direction bending perpendicular to inwall bottom and edge close inwall bottom, again to joining perpendicular to bending of the inwall direction of port 2 homonymies and the inwall that extends to last and port 2 homonymies, whole transmission line 4 is bent into U-shaped, and link 6 is positioned at the below of port 2.
As shown in Figure 7, be the schematic diagram of the cavity body filter of coupling loop 5 with another shape.Link 6 is located at the inwall bottom of cavity 1, transmission line 4 is connected with inner core 7 and perpendicular to the inwall of port homonymy at cavity 1 an inner end, then to bending perpendicular to the inwall bottom and along direction away from the inwall bottom, again to perpendicular to the inwall of port homonymy and along direction bending away from the inwall of port homonymy, has larger area coupling loop 5 to extending and the inwall bottom connection perpendicular to the direction of inwall bottom, forming then.
Owing to be that transmission line is directly linked to each other with cavity inner wall, rather than contact, therefore can not produce harmful effect to resonance frequency with resonant rod; Also not needing increases extra supporting construction, simple in structure; Transmission line has two strong points in addition, has good stability, and after bandwidth was as required determined the shape of transmission line, suitable batch production had good consistency.Only need the area of the alteration of form coupling loop of adjustment transmission line just can conveniently adjust port bandwidth.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. cavity body filter, comprise cavity, be located at the resonant rod and the transmission line of inside cavity and the port of being located at the cavity outside, be embedded with inner core in the port, it is characterized in that, described transmission line is connected with inner core at inside cavity one end, the inwall of the other end and cavity joins, and the inwall of transmission line and cavity forms closed coupling loop.
2. cavity body filter as claimed in claim 1 is characterized in that transmission line joins by the inwall of link and cavity.
3. cavity body filter as claimed in claim 2 is characterized in that, described link is a jump ring, and described jump ring is a screw-like, and its main body periphery is provided with external screw thread, and nail head is provided with blocked hole, and the other end of described transmission line is fixed in the described blocked hole.
4. cavity body filter as claimed in claim 2 is characterized in that, described link comprises screw and be located at boss on the inwall of cavity, and described boss is provided with screwed hole, and the other end of described transmission line is fixed between described screw and the boss.
5. cavity body filter as claimed in claim 1 is characterized in that the position that cavity inner wall is relative with resonant rod is provided with the coupling screw rod.
6. cavity body filter as claimed in claim 1 is characterized in that, the other end of described transmission line is connected on the inwall of described port homonymy or the inwall of described cavity bottom.
7. cavity body filter as claimed in claim 1, it is characterized in that, described transmission line one end is connected with inner core and extends to the direction of resonant rod perpendicular to the inwall of port homonymy, then to perpendicular to inwall bottom and along away from or near the direction bending of inwall bottom, to joining perpendicular to bending of the inwall direction of port homonymy and the inwall that extends to last and port homonymy, whole transmission line is bent into U-shaped again.
8. cavity body filter as claimed in claim 1, it is characterized in that, described transmission line one end is connected with inner core and extends to the direction of resonant rod perpendicular to the inwall of port homonymy, then to direction bending perpendicular to inwall bottom and edge close inwall bottom, and extending to inwall bottom and inwall bottom connection always, whole transmission line is bent into L shaped.
9. cavity body filter as claimed in claim 1, it is characterized in that, described transmission line one end is connected with inner core and perpendicular to the inwall of port homonymy, then to bending away from the inwall bottom direction perpendicular to inwall bottom and edge, again to bending perpendicular to the inwall of port homonymy and along inwall direction away from the port homonymy, then to perpendicular to inwall bottom and along near the bending of inwall bottom direction, at last to perpendicular to the inwall of port homonymy and along joining near the inwall direction bending of port homonymy and extension and inwall.
10. cavity body filter as claimed in claim 1, it is characterized in that, described transmission line one end is connected with inner core and perpendicular to the inwall of port homonymy, then to bending away from the inwall bottom direction perpendicular to inwall bottom and edge, to perpendicular to the inwall of port homonymy and along inwall direction bending, extend and the inwall bottom connection to the direction bottom inwall then again away from the port homonymy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920130771 CN201392877Y (en) | 2009-04-16 | 2009-04-16 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920130771 CN201392877Y (en) | 2009-04-16 | 2009-04-16 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392877Y true CN201392877Y (en) | 2010-01-27 |
Family
ID=41599698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920130771 Expired - Fee Related CN201392877Y (en) | 2009-04-16 | 2009-04-16 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201392877Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136617A (en) * | 2010-12-31 | 2011-07-27 | 深圳市大富科技股份有限公司 | Cavity filter, signal processing module and communication equipment |
| CN102354887A (en) * | 2011-08-15 | 2012-02-15 | 京信通信系统（中国）有限公司 | Radio frequency adapter |
-
2009
- 2009-04-16 CN CN 200920130771 patent/CN201392877Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136617A (en) * | 2010-12-31 | 2011-07-27 | 深圳市大富科技股份有限公司 | Cavity filter, signal processing module and communication equipment |
| CN102354887A (en) * | 2011-08-15 | 2012-02-15 | 京信通信系统（中国）有限公司 | Radio frequency adapter |
| CN102354887B (en) * | 2011-08-15 | 2013-10-16 | 京信通信系统（中国）有限公司 | Radio frequency adapter |
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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 |
Granted publication date: 20100127 Termination date: 20160416 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |