CN206864593U - A kind of cavity body filter - Google Patents
A kind of cavity body filter Download PDFInfo
- Publication number
- CN206864593U CN206864593U CN201720622674.4U CN201720622674U CN206864593U CN 206864593 U CN206864593 U CN 206864593U CN 201720622674 U CN201720622674 U CN 201720622674U CN 206864593 U CN206864593 U CN 206864593U
- Authority
- CN
- China
- Prior art keywords
- cavity
- resonant rod
- annular groove
- tuning screw
- shaped resonant
- Prior art date
- 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
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
A kind of cavity body filter, including cavity, cover plate, T-shaped resonant rod, tuning screw, the cover plate lid is located on cavity and is fixedly connected with the cavity, the T-shaped resonant rod is within the cavity, the cavity bottom is provided with boss, the T-shaped resonant rod is fixed by screws on boss, the T-shaped resonant rod is provided with the U-shaped hole of upper end open, the cover plate is provided with annular groove of the bottom protrusion in cavity, the annular groove inner bottom surface is provided with perforation and groove madial wall is provided with internal thread, the tuning screw is provided with the external screw thread being engaged with the internal thread, the tuning screw precession annular groove perforated is inserted in the U-shaped hole of the T-shaped resonant rod, and the upper end of T-shaped resonant rod does not contact with annular groove.The utility model is while cover sheet thickness is reduced, moreover it is possible to be tuned to lower frequency, not only saved cost but also reached the purpose that tuning range is wide, frequency is lower.
Description
Technical field
It the utility model is related to a kind of same axle box filter cavity.
Background technology
Microwave filter is widely used in the communications field as a kind of frequency selection device, in communication base station system,
It is mainly used in selecting signal of communication, filters out the clutter or interference signal outside communication signal frequency.Because cavity body filter is very suitable
Large-scale production is closed, and cost is also very cheap, therefore, cavity body filter is used mostly in base station system.Cavity body filter
Cavity can typically be equivalent to LRC resonance circuits, and when cavity size is smaller, its electric capacity C is reduced by, then band connection frequency is higher, instead
It is then lower.In wave filter design, when required band connection frequency requires very low, it need to just increase the size or increase chamber of cavity
The quantity of body, and this change for all causing cavity body filter size is big；When the size to the cavity has carried out clear and definite limitation
When, the requirement of low frequency and the size limited cannot be met simultaneously, cavity body filter is imitated to reach good filtering in addition
Fruit, the thickness of cover plate can be increased, wave filter weight increase is also unfavorable for cost control, tuning screw is raised in addition
In cover plate, in carrying, it is easy to damage tuning screw if any improper, leads to not knob tuning screw.
Utility model content
The purpose of this utility model is to provide a kind of cavity body filter, in order to solve the above technical problems, the utility model
Adopt the technical scheme that：A kind of cavity body filter, including cavity, cover plate, T-shaped resonant rod, tuning screw, the cover plate lid are set
It is fixedly connected on the cavity and with the cavity, the T-shaped resonant rod is within the cavity, and the cavity bottom is provided with convex
Platform, the T-shaped resonant rod are fixed by screws on boss, and the T-shaped resonant rod is provided with the U-shaped hole of upper end open, the lid
Plate is provided with annular groove of the bottom protrusion in cavity, and the annular groove inner bottom surface is provided with perforation and groove madial wall is set
There is internal thread, the tuning screw is provided with the external screw thread being engaged with the internal thread, the tuning screw precession annular groove
Perforated is inserted in the U-shaped hole of the T-shaped resonant rod, and the upper end of the T-shaped resonant rod does not contact with the annular groove.
Preferably, the tuning screw bottom is the arc-shaped structure of protrusion.
Preferably, the annular groove stretches into diameter of the outer bottom diameter more than the tuning screw of cavity.
Preferably, the distance of the upper end of the T-shaped resonant rod and the annular groove outer bottom 0.2mm-0.6mm it
Between.
Preferably, the annular groove and cover plate are integrated formed structures.
Preferably, the tuning screw is hollow structure.
Compared with prior art, the utility model has advantages below：
1st, tuning screw bottom described in the utility model is inserted in the U-shaped hole of the T-shaped resonant rod, and such a knot can pass through
The depth that tuning screw bottom enters the T-shaped resonant rod U-shaped hole is adjusted, obtains the frequency of needs, tuning range is big, can not
Lower frequency is obtained with increase cavity size.Tuning screw is stretched into cavity by the annular groove on cover plate, can
So that the top of tuning screw and the cover plate are flush or below lid surface, it is so convenient to carry without damaging tuning screw
Tuner section, is provided with screw thread in the side wall of annular groove, and tuning screw is provided with the external screw thread being engaged, such tuning screw rotation
Enter annular groove, the thickness of cover plate is reduced when taking such a mode, save material.The upper end of T-shaped resonant rod is equivalent to one
Capacitance sheet, more low frequency can be obtained, and be increased without T-shaped resonant rod height and diameter, save material, reduce cavity size.
2nd, further, the annular groove stretches into diameter of the outer bottom diameter more than the tuning screw of cavity, so
The part that annular groove gos deep into cavity can regard the second electric capacity as, can obtain lower frequency with the effect of T-shaped resonant rod, enter one
Step reduces cavity size.
3rd, further, tuning screw is hollow structure, alleviates wave filter weight, has saved material, reduces cost.
4th, further, tuning screw bottom is the arc-shaped structure of protrusion, avoids electric discharge phenomena.
5th, further, annular groove and cover plate are integrated formed structures, which simplify installation steps, cavity not rapid wear
It is bad.
Brief description of the drawings
Fig. 1 is internal structure schematic diagram of the present utility model；
Embodiment
Embodiment 1
As shown in figure 1, the present embodiment provides a kind of cavity body filter, including cavity 1, cover plate 2, T-shaped resonant rod 4, tuning
Screw rod 3, the lid of cover plate 2 are located on the cavity 1 and are fixedly connected with the cavity 1, and the bottom of cavity 1 is provided with boss 7,
The T-shaped resonant rod 4 is fixed on boss 7 by screw 8, and the T-shaped resonant rod 4 is provided with the U-shaped hole 6 of upper end open, described
Cover plate 2 is provided with annular groove 5 of the bottom protrusion in cavity, and the inner bottom surface of annular groove 5 is provided with perforation and groove
Side wall is provided with internal thread, and the tuning screw 3 is provided with the external screw thread being engaged with the internal thread, the precession of tuning screw 3
The perforated of annular groove 5 is inserted in the U-shaped hole 6 of the T-shaped resonant rod 4, and the upper end of the T-shaped resonant rod 4 and the annular are recessed
Groove 5 does not contact.
Not produce electric phenomenon, the bottom of tuning screw 3 is the arc-shaped structure of protrusion.
In this embodiment, it is preferred that the outer bottom diameter that annular groove 5 stretches into cavity 1 is more than the tuning screw 3
Diameter, so, equivalent to one electric capacity of annular groove 5, it can be coupled between T-shaped resonant rod 4, further reduce frequency, and
Without increasing a sheet metal on tuning screw 3 again in addition.
In the present embodiment, it is preferable that the upper end of the T-shaped resonant rod and the distance of the annular groove outer bottom exist
Between 0.2mm-0.6mm, so in frequency modulation, lower frequency can be obtained, is particularly suitable for the cavity body filter of low-frequency band.
Preferably, annular groove 5 and cover plate 2 are integrated formed structures, which simplify the installation procedure of cavity body filter,
Make cover plate 2 more durable.
In order to further mitigate wave filter weight, material is saved, the tuning screw 3 described in the present embodiment is hollow structure.
The bottom of tuning screw bottom 3 described in the utility model is inserted in the U-shaped hole 6 of the T-shaped resonant rod, and such a structure can be with
The depth for entering the U-shaped hole 6 of the T-shaped resonant rod 4 by adjusting the bottom of tuning screw 3, obtain the frequency of needs, tuning range
Greatly, the size of cavity 1 can be increased without and be obtained with lower frequency.Tuning screw 3 passes through the annular groove 5 on cover plate 2
Stretch into cavity, can make the top of tuning screw 3 with the cover plate 2 flush or below the surface of cover plate 2, so convenient carrying and
The screw division of tuning screw 3 is not damaged, screw thread is provided with the side wall of annular groove 5, and tuning screw 3 is provided with what is be engaged
External screw thread, such tuning screw 3 screw in annular groove 5, and the thickness of cover plate 2 is reduced when taking such a mode, save material.T
The capacitance sheet of the upper end of shape resonant rod 4 equivalent to one, can obtain more low frequency, and be increased without the height of T-shaped resonant rod 4 and straight
Footpath, material is saved, reduce the size of cavity 1.
The utility model is while cover sheet thickness is reduced, moreover it is possible to be tuned to lower frequency, not only saved cost but also reached
Purpose has been arrived, compared with prior art, there is progress.
Specific case used herein is set forth to principle of the present utility model and embodiment, above example
Explanation be only intended to help and understand core concept of the present utility model, it is preferable that the utility model can be enable to reach more excellent
Effect, rather than to limitation of the present utility model, for those of ordinary skill in the art, according to think of of the present utility model
Think, can also make other changes in specific embodiments and applications, in summary, the present embodiment content should not be construed as
To limitation of the present utility model.
Claims (6)
1. a kind of cavity body filter, including cavity, cover plate, T-shaped resonant rod, tuning screw, the cover plate lid are located at the cavity
Above and with the cavity it is fixedly connected, the T-shaped resonant rod is within the cavity, it is characterised in that：The cavity bottom is provided with convex
Platform, the T-shaped resonant rod are fixed by screws on boss, and the T-shaped resonant rod is provided with the U-shaped hole of upper end open, the lid
Plate is provided with annular groove of the bottom protrusion in cavity, and the annular groove inner bottom surface is provided with perforation and groove madial wall is set
There is internal thread, the tuning screw is provided with the external screw thread being engaged with the internal thread, the tuning screw precession annular groove
Perforated is inserted in the U-shaped hole of the T-shaped resonant rod, and the upper end of the T-shaped resonant rod does not contact with the annular groove.
A kind of 2. cavity body filter according to claim 1, it is characterised in that：The tuning screw bottom is the circle of protrusion
Arcuate structure.
A kind of 3. cavity body filter according to claim 1, it is characterised in that：The annular groove stretches into the outer bottom of cavity
Face diameter is more than the diameter of the tuning screw.
A kind of 4. cavity body filter according to claim 3, it is characterised in that：The upper end of the T-shaped resonant rod with it is described
The distance of annular groove outer bottom is between 0.2mm-0.6mm.
A kind of 5. cavity body filter according to claim 1, it is characterised in that：The annular groove and cover plate be one into
Type structure.
A kind of 6. cavity body filter according to claim 1, it is characterised in that：The tuning screw is hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720622674.4U CN206864593U (en) | 2017-05-31 | 2017-05-31 | A kind of cavity body filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720622674.4U CN206864593U (en) | 2017-05-31 | 2017-05-31 | A kind of cavity body filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206864593U true CN206864593U (en) | 2018-01-09 |
Family
ID=60825785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720622674.4U Expired - Fee Related CN206864593U (en) | 2017-05-31 | 2017-05-31 | A kind of cavity body filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206864593U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061332A (en) * | 2019-05-16 | 2019-07-26 | 深圳市国人射频通信有限公司 | A kind of cavity body filter and its resonant column |
| CN110518317A (en) * | 2019-09-23 | 2019-11-29 | 石家庄滤通微波科技有限公司 | A kind of implementation method of no screw small cavity filter |
-
2017
- 2017-05-31 CN CN201720622674.4U patent/CN206864593U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061332A (en) * | 2019-05-16 | 2019-07-26 | 深圳市国人射频通信有限公司 | A kind of cavity body filter and its resonant column |
| CN110518317A (en) * | 2019-09-23 | 2019-11-29 | 石家庄滤通微波科技有限公司 | A kind of implementation method of no screw small cavity filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104170162B (en) | Resonator, filter, duplexer and multiplexer | |
| CN206864593U (en) | A kind of cavity body filter | |
| CN105048051B (en) | A kind of tunable substrate integration wave-guide circular resonant cavity filter | |
| CN205069821U (en) | Cavity filter | |
| CN103094649B (en) | Cavity body filter | |
| CN104885293A (en) | Resonator, filter, duplexer, multiplexer and communication device | |
| CN104981938A (en) | Dielectric resonator, dielectric filter and communication device | |
| CN102857191A (en) | Inductance-variable resonator | |
| CN204927470U (en) | Miniaturized cavity filter | |
| CN203180029U (en) | Cavity filter and radio frequency communication device | |
| CN104269592B (en) | A kind of small cavity filter, multiplexer and combiner | |
| CN204088531U (en) | Close-coupled bimodulus dual-resonator microwave filter | |
| CN208078146U (en) | Cavity body filter | |
| CN106549202A (en) | A kind of resonator and cavity body filter | |
| CN108336460A (en) | A kind of microminiature 5G filters | |
| CN205921059U (en) | Cavity filter who contains adjustable capacitance coupling structure | |
| CN203351722U (en) | Small-scale cavity filter | |
| CN207994023U (en) | Cavity body filter | |
| CN207409636U (en) | High loading capacitance cavity band-pass filter | |
| CN103280617B (en) | Small cavity filter | |
| CN207303308U (en) | Bandstop filter and radio-frequency devices | |
| CN202839916U (en) | Coaxial cavity filter | |
| CN206864592U (en) | A kind of cavity body filter | |
| CN204156063U (en) | The inductive coupled structure of a kind of dielectric filter | |
| CN208539071U (en) | Low-frequency range cavity body filter broadband ports and filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180109 Termination date: 20180531 |