CN202282434U - Microstrip band-reject filter - Google Patents
Microstrip band-reject filter Download PDFInfo
- Publication number
- CN202282434U CN202282434U CN2011203675509U CN201120367550U CN202282434U CN 202282434 U CN202282434 U CN 202282434U CN 2011203675509 U CN2011203675509 U CN 2011203675509U CN 201120367550 U CN201120367550 U CN 201120367550U CN 202282434 U CN202282434 U CN 202282434U
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- China
- Prior art keywords
- cavity
- band
- strip line
- stop filter
- cover plate
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Abstract
The utility model provides a novel microstrip band-reject filter, comprising a cavity, a strip line filter plate, a cover plate, resonance columns and tuning screws; the cavity is divided into a first cavity and a second cavity; the strip line filter plate is in tight connection with the first cavity of the cavity and the inner part forms a lower cavity; the strip line filter plate is a PCB (Printed Circuit Board); the second cavity of the cavity includes the resonance columns; the cover plate is in tight connection with the cavity and forms an upper cavity with the strip line filter plate; the cover plate is also provided with through holes, through which the tuning screws are inserted into the resonance columns. Compared with prior arts, the microstrip band-reject filter of the utility model has a light structure, needs less components, has low requirements for processing precision of the components and assembling precision, can realize a broader range of frequency band choices and can meet index requirements without artificial debugging after design typification.
Description
Technical field
The utility model belongs to the wireless communication RF technical field, particularly relates to a kind of little band band stop filter.
Background technology
Little band band stop filter is used between wireless communication base station or repeater and the antenna.Referring to Fig. 1, its main effect is that the required emission of the wireless communication base station of different frequency range or repeater is synthesized with the reception signal, and a shared feeder line transmits signals to antenna.Use conversely also and can the Signal Separation that antenna receives be left wireless communication base station or the repeater of supplying with each different frequency range.Little band band stop filter is formed (see figure 2) by at least two wide band filters, and the band limits of filter has multiple combination, need decide according to applied wireless communication base station or repeater frequency range.
Referring to Fig. 3 and Fig. 4, Fig. 3 is the assembling sketch map of little band band stop filter in the prior art, and Fig. 4 is the sketch map of little band band stop filter cavity part of the prior art.
Can know that by Fig. 3 and Fig. 4 little band band stop filter of the prior art adopts the coaxial resonant cavity mode to realize the logical or band stop filter response of required band.Its main parts size has: cavity 31, resonance post 32, cover plate 33, trip bolt 34, port brace 35, connector 36, tuning screw rod 37 and transmission pole 38 and transmission pole support 39.Its implementation is: by cavity 31, and resonance post 32, cover plate 33; Trip bolt 34 is assembled into the coaxial resonant cavity physical structure; Because the characteristic of coaxial resonant cavity produces resonance on certain CF, carry out frequency trim with transmission pole 38 through tuning screw rod 37; Then can realize the debugging of resonance frequency, being linked to each other with connector 36 to fetch by port brace 35 then forms a logical or band stop filter response of the band with other external devices coupling.Because transmission pole 38 is very long, thus in the middle of adopted 39 pairs of transmission poles 38 of two transmission pole supports to support, but axially can't the fixing of transmission pole 38 is therefore to the performance index generation harmful effect of this little band band stop filter.
The inventor finds that prior art has following shortcoming at least in the process of implementing the utility model:
Existing little band band stop filter has determined it to be assembled by a plurality of parts owing to its implementation, and requires very high to the quality of fit of parts and parts.Moreover the parts of existing little band band stop filter are too much, cause the assembly tool anchor clamps too much, are difficult to ensure assembly precision.In addition; In existing little band band stop filter; Because the distance of tuning screw rod and transmission pole is very near; Make variations in temperature to produce very big influence, thereby cause performance index unstable, and can cause little band band stop filter that the problem of air big fire takes place to puncture under the situation of high power load easily the index performance of little band band stop filter.
The utility model content
The utility model provides a kind of novel little band band stop filter in order to solve the problems of the technologies described above, and comprising:
Cavity, strip line filter plate, cover plate; Resonance post and tuning screw rod;
Said cavity is divided into first cavity and second cavity;
Said strip line filter plate closely is connected with first cavity of said cavity, the inner lower chambers that forms; Said strip line filter plate is the PCB printed circuit board;
Be provided with said resonance post in second cavity of said cavity;
Said cover plate is connected with the tight of said cavity, forms upper chamber between itself and the said strip line filter plate;
Also be provided with through hole on the said cover plate, said tuning screw rod inserts in the said resonance post through the through hole on the said cover plate.
Wherein, said little band band stop filter also comprises a plurality of trip bolts;
Said a plurality of trip bolt passes the through hole on the strip line filter plate, and the fixing hole that presents screw thread with the inwall of setting on the said cavity is realized being threaded; Said a plurality of trip bolt passes said cover plate, and the fixing hole that presents screw thread with the inwall of setting on the said cavity is realized being threaded.
Wherein, said cover plate and said cavity one casting forming.
Wherein, the side of said little band band stop filter also is provided with and is used for connector that said little band band stop filter is connected with other external devices.
Wherein, said strip line filter plate is integrally formed.
Little band band stop filter that the utility model provides; It has replaced the mode of original cavity transmission line filtering with little band filtering mode of pcb board, and existing relatively little band band stop filter structure is light and handy, and required parts are few; And to the machining accuracy of parts; Assembly precision requires low, can realize wideer frequency band selection, can realize behind the design typification not needing manual debugging just can satisfy index request.Because it will have three parts such as the transmission pole in the design, tuning screw rod, transmission pole support now and be simplified to a pcb board; Therefore can avoid fully because the variations in temperature that the hypotelorism of tuning screw rod and transmission pole brings punctures the problem of air sparking to its Effect on Performance and generation; Therefore novel little band band stop filter has higher reliability than existing little band band stop filter; Be more suitable for producing lower production cost in enormous quantities.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Accompanying drawing 1 is used for the sketch map between wireless communication base station or repeater and the antenna for little band band stop filter of the prior art;
Accompanying drawing 2 is the sketch map that little band band stop filter is made up of at least two wide band filters in the prior art;
Accompanying drawing 3 is the structural representation of little band band stop filter of the prior art;
Accompanying drawing 4 is the another structural representation of little band band stop filter of the prior art;
The structural representation of little band band stop filter embodiment two that accompanying drawing 5 provides for the utility model;
The front schematic view of little band band stop filter embodiment two that accompanying drawing 6 provides for the utility model;
The side schematic view of little band band stop filter embodiment two that accompanying drawing 7 provides for the utility model;
The structural representation of little band band stop filter embodiment three that accompanying drawing 8 provides for the utility model;
The front schematic view of little band band stop filter embodiment three that accompanying drawing 9 provides for the utility model;
The side schematic view of little band band stop filter embodiment three that accompanying drawing 10 provides for the utility model.
Embodiment
The utility model embodiment technical problem to be solved is: provide a kind of structure light and handy; Required sub-parts are few; And to the machining accuracy of parts; Assembly precision requires low little band band stop filter, and it can realize wideer frequency band selection, can realize behind the design typification not needing manual debugging just can satisfy index request.
Referring to Fig. 5, a kind of novel little band band stop filter that the utility model provides, it comprises:
Said cavity 41 is divided into first cavity 410 and second cavity 411;
Said strip line filter plate 42 closely is connected with first cavity 410 of said cavity 41, the inner lower chambers that forms; Said strip line filter plate 42 is specially PCB (Printed Circuit Board) printed circuit board; Said strip line filter plate 42 is integrally formed.
Be provided with said resonance post 32 in second cavity 411 of said cavity 41;
Said cover plate 43 is connected with the tight of said cavity 41, forms upper chamber between itself and the said strip line filter plate 42;
Also be provided with through hole on the said cover plate 43, said tuning screw rod 37 inserts in the said resonance post 32 through the through hole on the said cover plate 43.
Alternatively, the side of said little band band stop filter also is provided with and is used for connector 45 that said little band band stop filter is connected with other external devices.
Need to prove; In little band band stop filter that the utility model provides; For the first cavity part of assembling more complicated, adopt integrally formed strip line filter plate to replace the tuning screw rod of usefulness of the prior art and adjust the mode of resonance post with the accurate debugging of realization resonance frequency, promptly adopted the strip line mode to realize required band resistance; Band is logical, high-pass filter response.And the simple relatively second cavity part of assembling still can adopt tuning screw rod to adjust the mode of resonance post with the accurate debugging of realization resonance frequency.Certainly in other implementation, second cavity part also can adopt the strip line filter plate to replace adjusting the mode of resonance post with the accurate debugging of realization resonance frequency with tuning screw rod.
Implement the utility model, only the length and the width of strip line cabling mode and strip line can be realized required response curve on the needs change strip line filter plate 42.Novel little band band stop filter is easy to assembly; And it is less demanding to assembly precision; And the debugging of utmost point short time just can realize the response curve of required filter; And because the physical characteristic of strip lines configuration has determined that this kind mode can be than the corresponding more frequency bandwidth of money that has of the filter of coaxial resonant cavity mode, lower insertion loss.
Referring to Fig. 6, be the structural representation of little band band stop filter embodiment two of providing of the utility model.
Parts that little band band stop filter that present embodiment provides is comprised with on an embodiment identical, what need to specify is, cover plate 43 is one casting formings with said cavity 41, Fig. 6 is the front schematic view of the little band band stop filter of assembling after accomplishing; Fig. 7 is for assembling the side schematic view of the little band band stop filter after accomplishing.
Referring to Fig. 8, be the structural representation of little band band stop filter embodiment three of providing of the utility model.
In the present embodiment, the execution mode that the cover plate of setting forth little band band stop filter in detail 43 and strip line filter plate 42 is connected with first cavity 410 in the cavity 41 through trip bolt 44.
The parts of little band band stop filter in comprising a last embodiment in the present embodiment, also comprise many trip bolts 44; Some trip bolts in said a plurality of trip bolt 44 pass the through hole on the strip line filter plate 42, and the fixing hole that presents screw thread with the inwall of setting on first cavity 410 of said cavity 41 is realized being threaded; In addition, other a plurality of trip bolts pass the through hole on said cover plate 43 and the strip line filter plate 42, and the fixing hole that presents screw thread with the inwall of setting on the said cavity 41 is realized being threaded.
Be provided with said resonance post 32 in second cavity 411 of said cavity 41; Said tuning screw rod 37 inserts in the said resonance post 32 through the through hole on the said cover plate 43.
Through screw 44, said strip line filter plate 42 has been realized fitting tightly with cover plate 43, and realizes closely being connected with cavity 41, in said cavity 41, forms chamber.Need to prove that said screw 44 not only is connected with the edge of cavity 41, also with in the middle of the cavity 41 have protruding part to be connected.
Fig. 9 is for assembling the front schematic view of the little band band stop filter after accomplishing; Figure 10 is for assembling the side schematic view of the little band band stop filter after accomplishing.
The existing relatively little band band stop filter structure of little band band stop filter that the utility model provides is light and handy, and required sub-parts are few, and to the machining accuracy of parts; Assembly precision requires low; Can realize wideer frequency band selection, can realize behind the design typification not needing manual debugging just can satisfy index request that therefore novel little band band stop filter has higher reliability than existing little band band stop filter; Be more suitable for producing lower production cost in enormous quantities.
It should be noted that; A kind of product form of the said little band band stop filter of the utility model; Other satisfies the said constructed products of the utility model; Not influence the factor of product performance inequality even material, device name, outward appearance, device are put sequential scheduling, still belongs to the scope of the utility model protection.
Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection range of the utility model.
Claims (5)
1. a little band band stop filter is characterized in that, comprising:
Cavity, strip line filter plate, cover plate; Resonance post and tuning screw rod;
Said cavity is divided into first cavity and second cavity;
Said strip line filter plate closely is connected with first cavity of said cavity, the inner lower chambers that forms; Said strip line filter plate is the PCB printed circuit board;
Be provided with said resonance post in second cavity of said cavity;
Said cover plate is connected with the tight of said cavity, forms upper chamber between itself and the said strip line filter plate;
Also be provided with through hole on the said cover plate, said tuning screw rod inserts in the said resonance post through the through hole on the said cover plate.
2. little band band stop filter as claimed in claim 1 is characterized in that, said little band band stop filter also comprises a plurality of trip bolts;
Said a plurality of trip bolt passes the through hole on the strip line filter plate, and the fixing hole that presents screw thread with the inwall of setting on the said cavity is realized being threaded; Said a plurality of trip bolt passes said cover plate, and the fixing hole that presents screw thread with the inwall of setting on the said cavity is realized being threaded.
3. little band band stop filter as claimed in claim 1 is characterized in that, said cover plate and said cavity one casting forming.
4. little band band stop filter as claimed in claim 1 is characterized in that, the side of said little band band stop filter also is provided with and is used for connector that said little band band stop filter is connected with other external devices.
5. like each described little band band stop filter in the claim 1 to 4, it is characterized in that said strip line filter plate is integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203675509U CN202282434U (en) | 2011-09-29 | 2011-09-29 | Microstrip band-reject filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203675509U CN202282434U (en) | 2011-09-29 | 2011-09-29 | Microstrip band-reject filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282434U true CN202282434U (en) | 2012-06-20 |
Family
ID=46228589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203675509U Expired - Lifetime CN202282434U (en) | 2011-09-29 | 2011-09-29 | Microstrip band-reject filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282434U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2505138A (en) * | 2012-12-12 | 2014-02-19 | Radio Design Ltd | A Filter including resonating means and transmission line located on or associated with a support member located over at least a part of the filter body |
| CN108470970A (en) * | 2018-02-01 | 2018-08-31 | 昆山立讯射频科技有限公司 | Filter cavity and cover board backman's wiring |
| CN111033884A (en) * | 2018-08-09 | 2020-04-17 | 深圳市大富科技股份有限公司 | Filter, duplexer and communication equipment |
-
2011
- 2011-09-29 CN CN2011203675509U patent/CN202282434U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2505138A (en) * | 2012-12-12 | 2014-02-19 | Radio Design Ltd | A Filter including resonating means and transmission line located on or associated with a support member located over at least a part of the filter body |
| GB2505138B (en) * | 2012-12-12 | 2014-08-06 | Radio Design Ltd | Filter assembly and method of manufacture thereof |
| CN108470970A (en) * | 2018-02-01 | 2018-08-31 | 昆山立讯射频科技有限公司 | Filter cavity and cover board backman's wiring |
| CN108470970B (en) * | 2018-02-01 | 2023-11-07 | 苏州立讯技术有限公司 | Filter cavity and cover plate auxiliary assembly line |
| CN111033884A (en) * | 2018-08-09 | 2020-04-17 | 深圳市大富科技股份有限公司 | Filter, duplexer and communication equipment |
| CN111033884B (en) * | 2018-08-09 | 2022-07-26 | 大富科技(安徽)股份有限公司 | Filter, duplexer and communication equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120620 |
|
| CX01 | Expiry of patent term |