CN204375896U - Cavity body filter - Google Patents
Cavity body filter Download PDFInfo
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- CN204375896U CN204375896U CN201420867594.1U CN201420867594U CN204375896U CN 204375896 U CN204375896 U CN 204375896U CN 201420867594 U CN201420867594 U CN 201420867594U CN 204375896 U CN204375896 U CN 204375896U
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- cavity
- resonant column
- body filter
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- capacitive load
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Abstract
The utility model discloses a kind of cavity body filter, comprise cavity, cover plate, connector, resonant column and tap, cover plate capping cavity forms resonant cavity, connector is fixed on the sidewall of cavity, resonant column is fixed on the diapire of cavity, one end that resonant column is relative with the diapire of cavity is provided with the capacitive load dish removably connected with it, and one end of tap is electrically connected with connector, and the other end and the capacitive load dish of tap are one-body molded.The utility model cavity body filter has lower manufacturing cost and effectively can avoid the generation of noise.
Description
Technical field
The utility model relates to wave filter technology field, particularly 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, 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.
Refer to Fig. 1, Fig. 1 is the partial structurtes schematic diagram of cavity body filter in a kind of prior art.Cavity body filter comprises cavity 11, cover plate 12, resonant rod 13, tuning screw 14, tap 15 and connector 16.Cover plate 12 capping cavity 11 forms resonant cavity, and the cylindrical shape that resonant rod 13 is one end open, the other end is closed, its closed end is screwed on the installation base bottom cavity 11.The openend of resonant rod 13 is provided with the capacitance disk of radially stretching out.Tuning screw 14 is arranged on cover plate 12, and stretches out towards resonant rod 13, and tuning screw 14 gos deep into the depth adjustable in resonant rod 13 opening, and to regulate the radio frequency parameter of cavity body filter.Connector 16 is arranged on the sidewall of cavity 11, and tap 15 is substantially L-shaped, and its one end is soldered on resonant rod 13, and the other end is electrically connected with connector 16.
To in the research and practice process of prior art, the present inventor finds, capacitance disk is shaping with resonant rod 13 integrated punching, comparatively big error is there is when larger change or manufacture occur for the demand in market, and tuning screw is when being not enough to the radio frequency parameter of cavity body filter to be adjusted to normal range (NR), the resonant rod that can only more renew, or old resonant rod is disassembled, cut away part capacitance disk after be installed to again in cavity.。In addition, tap 15 is connected with resonant rod 13 by the mode of welding, and the electromagnetic wave in tap is entering through solder flux in resonant rod 13 process and can reflect in solder flux, thus produces the electromagnetic wave different from original input signal frequency, namely produces noise.
Therefore, need to provide a kind of novel solution solved the problem.
Utility model content
The technical problem that the utility model mainly solves is to provide a kind of capacitive load dish and the integrated cavity body filter of tap.
The utility model embodiment discloses a kind of cavity body filter, comprise cavity, cover plate, connector, resonant column and tap, cover plate capping cavity forms resonant cavity, connector is fixed on the sidewall of cavity, resonant column is fixed on the diapire of cavity, one end that resonant column is relative with the diapire of cavity is provided with the capacitive load dish removably connected with it, and one end of tap is electrically connected with connector, and the other end and the capacitive load dish of tap are one-body molded.
The beneficial effects of the utility model are: the situation being different from prior art, in cavity body filter of the present utility model, capacitive load dish and resonant column detachable, like this when the demand in market occur larger change or manufacture occur comparatively big error time, only need to change capacitive load dish just passable, and do not need as prior art, change whole resonant column or process capacitive load dish further.Further, tap and capacitive load dish one-body molded, removably connect between capacitive load dish and resonant column, such electromagnetic signal is being imported into by tap in resonant column process and through the impurity as solder flux, therefore would not can not produced noise in communication process.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the sectional structure chart of cavity body filter in a kind of prior art;
Fig. 2 is the sectional structure chart of embodiment of the present invention cavity body filter;
Fig. 3 is the stereogram that cavity body filter shown in Fig. 2 removes cover plate.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment discloses a kind of cavity body filter, comprise cavity, cover plate, connector, resonant column and tap, cover plate capping cavity forms resonant cavity, connector is fixed on the sidewall of cavity, resonant column is fixed on the diapire of cavity, one end that resonant column is relative with the diapire of cavity is provided with the capacitive load dish removably connected with it, and one end of tap is electrically connected with connector, and the other end and the capacitive load dish of tap are one-body molded.In cavity body filter of the present utility model, capacitive load dish and resonant column detachable, like this when the demand in market occur larger change or manufacture occur comparatively big error time, only need to change capacitive load dish just passable, and do not need as prior art, change whole resonant column or process capacitive load dish further.Further, tap and capacitive load dish one-body molded, removably connect between capacitive load dish and resonant column, such electromagnetic signal is being imported into by tap in resonant column process and through the impurity as solder flux, therefore would not can not produced noise in communication process.
Consult Fig. 2 and Fig. 3, the utility model embodiment cavity body filter comprises cavity 21, cover plate 22, tap 23, connector 24, tuning screw 25, resonant column 26, clamp-screw 27 and capacitive load dish 28.
Cavity 21 comprises diapire 211 and extends with from diapire 211 is vertical and is located in the sidewall 212 at diapire 211 edge.Resonant column 26 is fixed on the diapire of cavity 21.In the present embodiment, resonant column 26 is in solid cylinder shape, shaping with diapire 211 integrally casting of cavity 21.The normally first punch forming of resonant column of the prior art, and then be screwed cavity diapire.Therefore the structure of the present embodiment resonant column 26 and processing mode eliminate processing and assembly process, reduce the manufacturing cost of cavity body filter.And resonant column 26 is arranged in solid cylinder shape, and capacitive load dish 28 can be facilitated to be fixed to resonant column 26.In other examples, resonant column 26 can also be hollow cylinder shape, adopts the integrated structure of diapire 211 with cavity 21; Or resonant column 26 is hollow cylinder shape, with cavity 21 split manufacture and then be fixed on the diapire 211 of cavity 21 by screw; Or resonant column 26 is solid cylinder shape, the two is connected with internal thread with external screw thread cavity 21 being arranged respectively interworking by resonant column 26.
Cover plate 22 for capping cavity 21 to form resonant cavity.Capacitive load dish 28, tap 23, resonant column 26 and clamp-screw 27 are arranged in resonant cavity.
Connector 24 is fixed on the sidewall 212 of cavity 21.Concrete meaning is, sidewall 212 is arranged and is communicated with resonant cavity and outside installing hole (sign), connector 24 is fixed on sidewall 212 by installing hole, connector 24 part is goed deep in resonant cavity to be electrically connected with tap 23, simultaneously, the jack (sign) of connector 24 can be watched, to realize the filter function of cavity body filter after the plug of correspondence inserts jack from the outer surface of the sidewall 212 of cavity 21 and the outside of cavity body filter.
Capacitive load dish 28 is removably connected to resonant column 26.In the present embodiment, capacitive load dish 28 by clamp-screw 27 be fixed on resonant column 26 with on the end face of diapire 211 opposite side of cavity 21.Particularly, capacitive load dish 28 is arranged through hole (sign), the corresponding position of resonant column 26 arranges screwed hole (sign), clamp-screw 27 to be screwed into after inserting the through hole of capacitive load dish 28 in the screwed hole of resonant column 26 thus tap 23 is connected to resonant column 26.Preferably, the outer surface of clamp-screw 27 has silver coating.For controlling cost and ensureing the starting point of working strength, clamp-screw 27 is usually adopted and is made of a steel, but the electric conductivity of steel is poor, silver coating the loss that can reduce electromagnetic signal propagation is set.
In other examples, capacitive load dish 28 and resonant column 26 can realize dismountable connection by interference fit or the mode such as to be threaded.The capacitive load dish 28 being connected to resonant column 26 forms electric capacity with cover plate 22.
In the present invention, one end and capacitive load dish 28 integrated punching of tap 23 are shaping.Due to the two one-body molded design, therefore thickness is only equivalent to the thickness manufacturing an element in prior art.Preferably, the thickness of capacitive load dish 28 and tap 23 is 1 ~ 2mm (millimeter), and the width of tap 23 is 2 ~ 3mm.Further, both capacitive load dish 28 and tap 23 are one-body molded, and the small volume of the two, is more easily mounted in cavity 21.
The other end of tap 23 is electrically connected with connector 24.Tap 23 can be connected by the mode of welding or connected by other dismountable modes with the connection of connector 24.
Tuning screw 25 is located on cover plate 22 and part is goed deep in resonant cavity, in other words, tuning screw 25 through cover plate 22 and part be inserted in resonant cavity.The radio frequency parameter of cavity body filter is regulated by arranging tuning screw 25 length variations stretched in resonant cavity.
In the present embodiment, because resonant column 26 is solid, therefore, if tuning screw 25 is positioned at directly over capacitive load dish 28, then tuning screw 25 distance goed deep in resonant cavity is subject to the restriction of capacitive load dish 28, greatly limits to the parameter adjustable range of cavity body filter; Preferably, tuning screw 25 part goed deep in resonant cavity is positioned at outside capacitive load web edge, to increase the parameter adjustable range of tuning screw 25 pairs of cavity body filters; In other words, on the axis direction perpendicular to tuning screw 25, tuning screw 25 and tap 23 are staggered and are arranged.Preferably, tuning screw 25 and tap 23 on the axis direction perpendicular to tuning screw 25 between spacing be 1.5 ~ 2mm.
Be in the embodiment of hollow cylinder shape at resonant column, the central authorities of capacitive load dish 28 can arrange through hole, the inwall of through hole arranges internal thread, and on the sidewall of resonant column 26, correspondence arranges external screw thread, and the mode that capacitive load dish 28 can be threaded connection is fixed to resonant column 26.Now, preferably, tuning screw 25 stretches in resonant column 26, and tuning screw 25 stretches into adjustable in length in resonant column 26 to regulate the radio frequency parameter of cavity body filter.
Be different from prior art, in the cavity body filter that the present embodiment provides, capacitive load dish and resonant column detachable, like this when occur when the demand in market larger change or manufacture occur comparatively big error time, only need to change capacitive load dish just passable, and do not need as prior art, change whole resonant column or process capacitive load dish further.Further, tap and capacitive load dish one-body molded, removably connect between capacitance disk and resonant column, such electromagnetic signal to be imported into by tap in resonant column process and through the impurity as solder flux, therefore would not can not produced noise in communication process.
The foregoing is only execution mode of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a cavity body filter, comprises cavity, cover plate, connector, resonant column and tap, and cavity described in described cover plate capping forms resonant cavity, and described connector is fixed on the sidewall of described cavity, it is characterized in that,
Described resonant column is fixed on the diapire of described cavity, one end that described resonant column is relative with the diapire of described cavity is provided with the capacitive load dish removably connected with it, one end of described tap is electrically connected with described connector, and the other end and the described capacitive load dish of described tap are one-body molded.
2. cavity body filter according to claim 1, is characterized in that, described resonant column is solid cylinder shape, one-body molded with the diapire of described cavity.
3. cavity body filter according to claim 1 and 2, is characterized in that, described capacitive load dish clamp-screw is fixed on the end face of the diapire opposite side of described resonant column and cavity.
4. cavity body filter according to claim 3, is characterized in that, the outer surface of described clamp-screw has silver coating.
5. cavity body filter according to claim 3, is characterized in that, described cover plate is provided with the tuning screw stretched in described resonant cavity, and described tuning screw stretches into the depth adjustable joint in described resonant cavity.
6. cavity body filter according to claim 5, is characterized in that, the described tuning screw part stretched in described resonant cavity is positioned at outside described capacitive load web edge.
7. cavity body filter according to claim 1, is characterized in that, described resonant column is hollow cylinder shape, one-body molded with the diapire of described cavity.
8. cavity body filter according to claim 1, is characterized in that, described resonant column is hollow cylinder shape, is screwed the diapire at described cavity.
9. the cavity body filter according to claim 7 or 8, it is characterized in that, described capacitive load dish central authorities are provided with through hole, the inwall of described through hole is provided with internal thread, the sidewall of described resonant column is provided with external screw thread, and the mode that described capacitive load dish is threaded connection is fixed on described resonant column.
10. cavity body filter according to claim 9, is characterized in that, described cover plate is provided with the tuning screw stretched in described resonant column, and described tuning screw stretches into the depth adjustable joint in resonant column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867594.1U CN204375896U (en) | 2014-12-30 | 2014-12-30 | Cavity body filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867594.1U CN204375896U (en) | 2014-12-30 | 2014-12-30 | Cavity body filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204375896U true CN204375896U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420867594.1U Active CN204375896U (en) | 2014-12-30 | 2014-12-30 | Cavity body filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204375896U (en) |
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2014
- 2014-12-30 CN CN201420867594.1U patent/CN204375896U/en active Active
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