CN205355219U - Cavity filter and communication radio frequency device - Google Patents
Cavity filter and communication radio frequency device Download PDFInfo
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- CN205355219U CN205355219U CN201521136844.5U CN201521136844U CN205355219U CN 205355219 U CN205355219 U CN 205355219U CN 201521136844 U CN201521136844 U CN 201521136844U CN 205355219 U CN205355219 U CN 205355219U
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- cavity
- low pass
- pass filters
- cover plate
- body filter
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Abstract
The utility model discloses a cavity filter and communication radio frequency device, cavity filter includes cavity, apron, connector and flaky low pass filter piece, the apron closing cap the cavity forms the resonant cavity, the low pass filter piece is fixed through insulating fixing part in the cavity, and with the connector is connected. The utility model discloses an another technical scheme be: the utility model provides a communication radio frequency device, communication radio frequency device is including above -mentioned arbitrary cavity filter, cavity filter locates the signal transceiver circuits part of communication radio frequency device for select the signal, communication radio frequency device is simplex ware or duplexer or branching unit or combiner or top of the tower amplifier, through above -mentioned mode, the utility model discloses the volume of wave filter can be reduced, the technological requirement is reduced.
Description
Technical field
This utility model relates to electronic technology field, particularly relates to a kind of cavity body filter and communication radio frequency device.
Background technology
Low pass filter is to allow to pass through lower than the signal of cut-off frequency, and a kind of components and parts intransitable higher than the signal of cut-off frequency or electronic circuit combination, it is widely used in each class of electronic devices, is one of requisite device in major part circuit.
Consult Fig. 1 and Fig. 2, in existing low pass filter, generally include cavity 11, low-pass filtering element 12, heat-shrinkable T bush 13, cover plate 14 and adapter 15.Low-pass filtering element 12 is generally the low pass of sugarcoated haws on a stick formula, and externally used heat-shrinkable T bush 13 surrounds, and is then placed within cavity 11, compresses again through cover plate 14, to be fixed in cavity 11 by low-pass filtering element 12.The two ends of low-pass filtering element 12 are connected with adapter 15 respectively, thus signal inputs to low-pass filtering element 12 from one of them adapter 15, after the filter action of low-pass filtering element 12, export through another adapter 15.
But, in above-mentioned low pass filter, as shown in Figure 2, what low-pass filtering element 12 adopted is sugarcoated haws on a stick formula wave filter, stepped for what just rise and fall, volume is relatively big, and structure is complex, it is unfavorable for the miniaturization of low pass filter, and manufacturing process is complex, be unfavorable for that cost reduces.
Utility model content
This utility model, mainly solving the technical problems that provide a kind of cavity body filter and communication radio frequency device, is conducive to reducing the volume of wave filter, and can reduce the manufacturing process requirement of wave filter.
For solving above-mentioned technical problem, the technical scheme that this utility model adopts is: provide a kind of cavity body filter, including the low pass filters of cavity, cover plate, adapter and lamellar；Described cover plate covers described cavity and forms resonator cavity；Described low pass filters is fixed in described cavity by insulating fixing piece, and is connected with described adapter.
Wherein, cavity body filter also includes tuned cell, described cover plate is provided with through hole, described tuned cell is inserted in the through hole of described cover plate, between described low pass filters and described cover plate, there is preset distance, so that described tuned cell can be inserted between described cover plate and described low pass filters, and insert the adjustable length of tuned cell between described cover plate and described low pass filters.
Wherein, described low pass filters includes bottom and the sidepiece of lamellar, described bottom and sidepiece and forms groove structure, and described tuned cell end is inserted in described groove structure.
Wherein, described tuned cell is tuning screw, and the through hole on described cover plate is the screw suitable with described tuning screw.
Wherein, the quantity of described tuning screw is four, and the quantity of the through hole on described cover plate is also four.
Wherein, described insulating fixing piece is plastic cement screw, and described low pass filters and described cavity are equipped with the screw matched with described plastic cement screw, to realize being fixed in described cavity described low pass filters.
Wherein, it is provided with insulation spacer between the bottom of described low pass filters and described cavity.
Wherein, described insulation spacer is polytetrafluoroethylplastic plastic pad.
Wherein, it is unsettled between the bottom of described low pass filters and described cavity.
For solving above-mentioned technical problem, another technical scheme that this utility model adopts is: provide a kind of communication radio frequency device, described communication radio frequency device includes the cavity body filter described in any of the above-described item, described cavity body filter is located at the transceiver circuit part of described communication radio frequency device, for signal is selected, described communication radio frequency device is either simplex device or duplexer or shunt or combiner or tower amplifier.
The beneficial effects of the utility model are: be different from the situation of prior art, in cavity body filter of the present utility model, by low pass filters being set to the filter plate of lamellar, compared with existing sugarcoated haws on a stick shape filter element, the filter plate volume of laminated structure is less, and structure is more simple, be conducive to reducing the volume of wave filter, simultaneously can Simplified flowsheet, and the filter plate of lamellar is more easily by mould batch machining, advantageously reduces cost.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of a kind of low pass filter in prior art；
Fig. 2 is the perspective view of the low-pass filtering element of the sugarcoated haws on a stick formula shown in Fig. 1；
Fig. 3 is the perspective view of cavity body filter one embodiment of the present utility model；
Fig. 4 is the schematic cross-section along AB line of the cavity body filter shown in Fig. 3；
Fig. 5 is in the cavity body filter shown in Fig. 3, the perspective view of low pass filters；
Fig. 6 is the perspective view of this utility model another embodiment of cavity body filter；
Fig. 7 is the schematic cross-section along CD line of the cavity body filter shown in Fig. 6；
Fig. 8 is the structural representation of this utility model communication radio frequency device one embodiment.
Detailed description of the invention
Below in conjunction with drawings and embodiments, this utility model is described in detail.
Consulting Fig. 3 to Fig. 5, in an embodiment of this utility model cavity body filter, cavity body filter includes the low pass filters 34 of cavity 31, cover plate 32, adapter 33 and lamellar.
For example, the quantity of adapter 33 is two in the present embodiment, is separately positioned on the two ends of cavity 31, and the quantity of certain adapter 33 is not limited to this.Cover plate 32 covers cavity 31 to form resonator cavity 311.Wherein, low pass filters 34 is positioned at resonator cavity 311, and low pass filters 34 is fixed in cavity 31 by insulating fixing piece 35, and is connected with two adapters 33.Thus, a signal adapter 33 from which inputs, and after the filter action of low pass filters 34, exports from another adapter 33, thus realizing the filter action of cavity body filter.
In one embodiment, the structure of low pass filters 34 can be structure as shown in Figure 5, and including bottom 341 and the sidepiece 342 of lamellar, bottom 341 and sidepiece 342 form groove structure, when being installed in resonator cavity 311 by low pass filters 34, slot opening is towards cover plate 32.Certainly, in other embodiments, low pass filters 34 can also be other structures, for instance is not provided with sidepiece 342, and is only the bottom 341 with structure in the form of sheets.
In present embodiment, by low pass filters 34 is designed as laminated structure so that low pass filters 34 can be made to thinner, compared with existing sugarcoated haws on a stick formula filter element, thickness is less, has less volume, thus can so that the volume of wave filter is less, be conducive to the miniaturization of device, and relative sugarcoated haws on a stick formula filter element, structure is relatively simple, advantageously reduces technological requirement, produce easily by mould batch machining, it is possible to reduce cost.
Additionally, in the prior art, owing to the low-pass filtering component size of sugarcoated haws on a stick shape is bigger, and need cover plate to compress, cause wave filter general tuned cell can not be installed, make low pass filter index non-adjustable, and the cavity body filter that this utility model provides is due to the low pass filters small volume of lamellar, tuned cell then can be on the cover board installed, the index realizing low pass filter is adjustable, specifically refer to Fig. 6 and Fig. 7, Fig. 6 is the perspective view of this utility model another embodiment of cavity body filter, Fig. 7 is the schematic cross-section along CD line of the cavity body filter shown in Fig. 6, wherein in figure, the element effect of identical label is identical.In the present embodiment, cavity body filter includes the low pass filters 34 of cavity 31, cover plate 32, adapter 33 and lamellar, and cover plate 32 covers cavity 31 to form resonator cavity 311.Low pass filters 34 is positioned at resonator cavity 311, and is fixed in cavity 31 by insulating fixing piece 35, and is connected with two adapters 33.Further, cavity body filter also includes tap sheet 36, tuned cell 37 and insulation spacer 38.
Wherein, the two ends of low pass filters 34 are connected with adapter 33 respectively through tap sheet 36.Low pass filters 34 and tap sheet 36 can pass through to weld, be spirally connected or the mode such as riveted joint is attached.Certainly, in other embodiments, low pass filters 34 can also be the mode such as directly pass through to weld to link together with adapter 33.
Wherein, low pass filters 34 is the laminated structure of surfacing, naturally it is also possible to making low pass filters 34 according to actual needs is the non-smooth laminated structure in surface.
With continued reference to Fig. 7, in present embodiment, cover plate 32 being provided with through hole 321, tuned cell 37 is inserted in the through hole of cover plate 32 in 321.Wherein, between low pass filters 34 and cover plate 32, there is preset distance, namely there is certain space between low pass filters 34 and cover plate 32, so that tuned cell 37 can be inserted between cover plate 32 and low pass filters 34, and insert the adjustable length of tuned cell 37 between cover plate 32 and low pass filters 34.Thus, the length between cover plate 32 and low pass filters 34 is inserted by control tuned cell 37, it may be achieved the performance indications of cavity body filter are adjustable so that the range of application of cavity body filter is wider.
Preferably, if low pass filters 34 is the structure shown in Fig. 5, then the end of tuned cell 37 may be inserted in the groove structure of bottom 341 and sidepiece 342 formation, further enhances tuning effect.
Wherein, tuned cell 37 is tuning screw, through hole 321 on cover plate 32 is the screw suitable with tuning screw, thus tuning screw can be fixed on cover plate 32, and can as required by the length of interior for tuning screw precession cavity 31 tuning screw to increase between cover plate 32 and low pass filters 34, or tuning screw is screwed out cavity 31 to reduce the length of the tuning screw between cover plate 32 and low pass filters 34, thus can realize the adjustment to cavity body filter RF index.Wherein, the quantity of tuning screw is four, naturally it is also possible to be one, two or more, the quantity of the through hole 321 on cover plate 32 is identical with the quantity of tuning screw.
In the present embodiment, tuning screw can be made for metal.
In other embodiments, tuned cell can also be that other have the conductor of electric conductivity, for instance can be to form tuned cell at one layer of conductive layer of outer surface of insulating base.In addition, tuned cell can also be fixed on the cover board by other means, such as at the upper surface of cover plate, two fixture blocks can be set to clamp tuned cell, when tuned cell is inserted or pull out cavity by needs, make two fixture blocks unclamp i.e. removable tuned cell, make when tuned cell need not be moved two fixture blocks clamp tuned cell with fixing tuned cell.
With continued reference to Fig. 7, in present embodiment, cavity 31 is metallic cavity, insulating fixing piece 35 is the plastic cement screw of insulation, the bottom of low pass filters 34 and cavity 31 is equipped with the screw matched with plastic cement screw, thereby through plastic cement screw, low pass filters 34 and cavity 31 are spirally connected, thus low pass filters 34 and cavity 31 are fixed.By using insulating fixing piece 35 low pass filters 34 and cavity 31 to be interfixed, to avoid low pass filters 34 to be electrically connected with the cavity 31 of metal by insulating fixing piece 35, and then cavity 31 is avoided to affect the performance of low pass filters 34.
Wherein, insulation spacer 38 it is provided with between the bottom of low pass filters 34 and cavity 31.Insulation spacer 38 can be politef (PTFE) plastic spacer, or the pad that other insulant are formed, and the thickness of insulation spacer 38 can be set according to the parameter of low pass filters 34.By insulation spacer 38, it is possible to the calibrated distance guaranteed between bottom card low pass filters 34 and cavity 31, improve precision.Certainly, can also be unsettled between the bottom of low pass filters 34 and cavity 31, namely not need pad between the two, as long as guaranteeing low pass filters 34 and cavity 31 bottom insulation.
In present embodiment, by using plastic cement screw to be fixed low pass filters 34, compared with the existing mode being compressed filter element by cover plate, enable to low pass filters 34 and skew is less likely to occur, improve stability and the reliability of low pass filters 34, also make intermodulation parameter more stable.And, by making low pass filters 34 use plastic cement screw to be fixed, need not rely on the fixing of cover plate, therefore filter plate 34 need not strictly mate as in the prior art with the cavity in cavity 31, thus can reduce the tolerance of low pass filters 34, cavity 31 size, therefore more easily reach tolerance.
Certainly, in other embodiments, low pass filters 34 can also adopt other fixed forms to fix filter plate, the fixing low pass filters of insulated fastener structure is such as set bottom cavity 31, or low pass filters is fixed on insulation spacer by the mode bonding by insulating cement, and make insulation spacer be fixed on cavity bottom, thus realize the fixing of low pass filters.
Consulting Fig. 8, in an embodiment of communication radio frequency device of the present invention, communication radio frequency device 80 includes transceiver circuit part 81, is wherein provided with the cavity body filter described in aforementioned any embodiment in transceiver circuit part 81.
Wherein communication radio frequency device 80 can be either simplex device, or can also be duplexer or shunt or combiner or tower amplifier.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure utilizing this utility model description and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in scope of patent protection of the present utility model.
Claims (10)
1. a cavity body filter, it is characterised in that include the low pass filters of cavity, cover plate, adapter and lamellar；
Described cover plate covers described cavity and forms resonator cavity；
Described low pass filters is fixed in described cavity by insulating fixing piece, and is connected with described adapter.
2. cavity body filter according to claim 1, it is characterized in that, also include tuned cell, described cover plate is provided with through hole, described tuned cell is inserted in the through hole of described cover plate, between described low pass filters and described cover plate, there is preset distance, so that described tuned cell can be inserted between described cover plate and described low pass filters, and insert the adjustable length of tuned cell between described cover plate and described low pass filters.
3. cavity body filter according to claim 2, it is characterised in that described low pass filters includes bottom and the sidepiece of lamellar, described bottom and sidepiece and forms groove structure, and described tuned cell end is inserted in described groove structure.
4. cavity body filter according to claim 2, it is characterised in that described tuned cell is tuning screw, the through hole on described cover plate is the screw suitable with described tuning screw.
5. cavity body filter according to claim 4, it is characterised in that the quantity of described tuning screw is four, the quantity of the through hole on described cover plate is also four.
6. cavity body filter according to claim 1, it is characterized in that, described insulating fixing piece is plastic cement screw, and described low pass filters and described cavity are equipped with the screw matched with described plastic cement screw, to realize being fixed in described cavity described low pass filters.
7. cavity body filter according to claim 1, it is characterised in that be provided with insulation spacer between the bottom of described low pass filters and described cavity.
8. cavity body filter according to claim 7, it is characterised in that described insulation spacer is polytetrafluoroethylplastic plastic pad.
9. cavity body filter according to claim 1, it is characterised in that be unsettled between the bottom of described low pass filters and described cavity.
10. a communication radio frequency device, it is characterized in that, described communication radio frequency device includes the cavity body filter described in any one of claim 1～9, described cavity body filter is located at the transceiver circuit part of described communication radio frequency device, for signal is selected, described communication radio frequency device is either simplex device or duplexer or shunt or combiner or tower amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136844.5U CN205355219U (en) | 2015-12-30 | 2015-12-30 | Cavity filter and communication radio frequency device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136844.5U CN205355219U (en) | 2015-12-30 | 2015-12-30 | Cavity filter and communication radio frequency device |
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| CN205355219U true CN205355219U (en) | 2016-06-29 |
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| CN201521136844.5U Active CN205355219U (en) | 2015-12-30 | 2015-12-30 | Cavity filter and communication radio frequency device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374950A (en) * | 2016-08-25 | 2017-02-01 | 合肥博雷电气有限公司 | Broadband radio-frequency amplification transceiving component |
| WO2017113328A1 (en) * | 2015-12-31 | 2017-07-06 | 深圳市大富科技股份有限公司 | Cavity filter, low-pass member thereof, and manufacturing method therefor |
| CN107615574A (en) * | 2015-12-30 | 2018-01-19 | 深圳市大富科技股份有限公司 | A kind of cavity body filter and communication radio frequency device |
-
2015
- 2015-12-30 CN CN201521136844.5U patent/CN205355219U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107615574A (en) * | 2015-12-30 | 2018-01-19 | 深圳市大富科技股份有限公司 | A kind of cavity body filter and communication radio frequency device |
| WO2017113328A1 (en) * | 2015-12-31 | 2017-07-06 | 深圳市大富科技股份有限公司 | Cavity filter, low-pass member thereof, and manufacturing method therefor |
| CN107615575A (en) * | 2015-12-31 | 2018-01-19 | 深圳市大富科技股份有限公司 | Cavity body filter and its low pass piece and preparation method |
| CN106374950A (en) * | 2016-08-25 | 2017-02-01 | 合肥博雷电气有限公司 | Broadband radio-frequency amplification transceiving component |
| CN106374950B (en) * | 2016-08-25 | 2018-08-31 | 合肥博雷电气有限公司 | A kind of broadband radio frequency amplification transmitting-receiving subassembly |
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