CN205069823U - High -efficient cavity filter of low frequency - Google Patents
High -efficient cavity filter of low frequency Download PDFInfo
- Publication number
- CN205069823U CN205069823U CN201520775635.9U CN201520775635U CN205069823U CN 205069823 U CN205069823 U CN 205069823U CN 201520775635 U CN201520775635 U CN 201520775635U CN 205069823 U CN205069823 U CN 205069823U
- Authority
- CN
- China
- Prior art keywords
- cavity
- cover plate
- facing
- tuning screw
- low frequency
- 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
The utility model relates to a wave filter field, concretely relates to high -efficient cavity filter of low frequency, including upper end open -ended cavity, detachable lid locate the cavity upper end the apron, install in the tuning screw rod on apron upper portion, install in cavity bottom and the relative syntonizer that sets up with tuning screw rod, threaded hole is seted up to the apron, just laps the lower surface and is equipped with a ring bodies with the corresponding department of syntonizer, and tuning screw rod passes screw hole and ring bodies and syntonizer and sets up relatively, tuning screw rod include the main part, can the screw in the threaded hole of apron and the facing of looks adaptation meshing with it with set up the external screw thread that deviates from cavity one end in the main part, the facing presets in threaded hole, the syntonizer including install in the body of rod of cavity bottom with set up in the capacitor sheet on body of rod top, the body of rod is the cavity form, tuning screw rod wears to establish in the body of rod that the apron stretched into the cavity form. The utility model discloses low in manufacturing cost, harmonious effectual, can be applicable to the low frequency harmonious, be favorable to realizing that the product is miniaturized.
Description
Technical field
The utility model relates to filter field, particularly relates to a kind of low frequency high efficiency cavity body filter.
Background technology
Along with the development of mobile communication, the telephone traffic that user uses mobile phone to produce in building increases day by day, require that indoor also cover good Mobile Communication Service, but because body of wall is thicker, area is comparatively large, the more high reason of floor in building, often there is network blind area of coverage, meanwhile, between each operator, the keen competition of user is also made indoor communications overlay network increase, disturbs aggravation, people is the deterioration causing communication quality, produces Intermodulation Interference.Intermodulation Interference refers to two different frequency signals, superposes and the signal of the new frequency of generation, when this signal drops in frequency acceptance band, will affect the normal reception of telecommunication apparatus in a certain system.
Cavity body filter, as a kind of frequency selection device, for selecting communication signal frequency and clutter outside filtering communication signal frequency or interference signal, is widely used in mobile base station, to reduce inter-modulated signal interference.
Intermodulation is the important indicator of filter product, but cavity body filter of the prior art generally comprises cavity, cover plate, resonant rod and tuning screw, cover plate is provided with screwed hole, tuning screw stretches in resonant cavity by the through hole on cover plate, form structure capacitive with resonant rod, regulated the frequency of filter by the depth regulating tuning screw to screw in cover plate.Under this regulative mode, when low-frequency range is tuning, often occur false bar or short circuit phenomenon, cause the structure capacitive between resonant rod and tuning screw little, resonance frequency is high, intermodulation weak effect.In the low band filter design of prior art, for reducing resonance frequency, usually can in the structure of resonant rod end loading capacitance disk to increase electric capacity.
But on the one hand, waste material, manufacturing cost are high, on the other hand, because cavity body structure is less, the diameter of electric capacity disk can not be too large, it is undesirable that electric capacity increases effect, tuning effect is bad, significantly can not reduce resonance frequency, if increase cavity size, small product size can be caused again large, be unfavorable for realizing product miniaturization.
Utility model content
Based on this, be necessary to provide a kind of low cost of manufacture, tuning effective, the low frequency high efficiency cavity body filter that low frequency is tuning, be conducive to realizing product miniaturization can be applicable to.
The purpose of this utility model realizes by following technical proposal: a kind of low frequency high efficiency cavity body filter, comprise the cavity of upper end open, dismountable be covered on cavity upper end cover plate, the tuning screw being installed on cover plate top, be installed on cavity bottom and the resonator be oppositely arranged with tuning screw; Described cover plate offers screwed hole, and cover plate lower surface and resonator corresponding section are provided with a ring bodies, and described tuning screw passes screwed hole and ring bodies and resonator and is oppositely arranged; Described tuning screw comprises main body, the screwed hole of described cover plate can be screwed in and can with it suitable engagement facing and be arranged at the external screw thread that main body deviates from cavity one end, described facing is preset in screwed hole, described in screw in facing and make tuning screw be fastened in the screwed hole of cover plate to extrude facing; Described resonator comprises the body of rod being installed on cavity bottom and the capacitance sheet being arranged at body of rod top, and the described body of rod is hollow form, and described tuning screw wears cover plate and stretches in the body of rod of hollow form.
Being improved to further technique scheme, described cavity is bonding by conductive silver glue with described cover plate.
Being improved to further technique scheme, described facing is nylon elastic part, described in screw into and make facing produce deformation engaging with it.
Being improved to further technique scheme, described facing is overall cylindrical helicoid.
Being improved to further technique scheme, described resonator and cavity bottom is one-body molded or die cast.
Being improved to further technique scheme, the position of the corresponding resonator of described cavity bottom is provided with fin; Several radiating fins that described fin comprises pedestal and extends from pedestal side, one end that described radiating fin deviates from pedestal wears stretches out well floor, and the outer surface of described pedestal and radiating fin is coated with solidification graphene layer.
Being improved to further technique scheme, described pedestal is circular, and described radiating fin is bar shaped and is evenly laid in pedestal circumferentially.
Being improved to further technique scheme, described radiating fin offers several louvres.
The beneficial effects of the utility model are:
1, on the one hand, resonator is not set up the capacitance disk of round metal plate-like to increase electric capacity, replace is by arranging a ring bodies at cover plate lower surface and resonator corresponding section, the right opposite added between capacitor board amasss, according to capacitance equation: C=(ε * S)/(4 π * k*d), when the long-pending increase of right opposite, electric capacity increases, make when carrying out low frequency and being tuning, be conducive to reducing resonance frequency, improving tuning effect, simultaneously relative to the resonator cutting forming with capacitance disk, save material, be conducive to reducing costs, second aspect, when C mono-timing, because S increases, then the distance d between capacitor board reduces, and can reduce the distance between tuning screw and resonator, is conducive to the miniaturization realizing product, the third aspect, by the facing of tuning screw is preset in screwed hole, the male end of main body being screwed in is provided with in the screwed hole of facing again, and extrude facing, tuning screw is made to be fastened in the screwed hole of cover plate by the frictional force of both sides inside and outside facing thus to realize self-locking, do not need by nut, tuning screw to be installed on the cover board, be conducive to further saving material, reduce costs, and pass through facing, closely cooperating between external screw thread and screwed hole, make to combine closely between cover plate and tuning screw, tuning screw and cover plate binding site little to intermodulation effects, resonance frequency is little, be conducive to improving tuning effect, fourth aspect, resonator comprises the body of rod being installed on cavity bottom and the capacitance sheet being arranged at body of rod top, the body of rod is hollow form, stretch in the body of rod of hollow form because tuning screw wears cover plate, further reduce the distance d between capacitor board, increase right opposite and amass S, be conducive to increasing structure capacitive, improve tuning effect.
2, cavity is bonding by conductive silver glue with cover plate, and the joint face of seal chamber and cover plate, prevents electromagnetic leakage, improves tuning effect further.
3, facing is the elastic component be made up of nylon, nylon not only has certain elasticity, also has certain rigidity, facing and the frictional force between screwed hole and external screw thread can be ensured, ensure the reliability connected, screw into and make facing produce deformation and engage with it, certain deformation will be produced when facing is assembled in the screwed hole of cover plate or when assembling mutually with the main body of tuning screw, as stretched, thus the main body of tuning screw is not easily skidded, firm connection, and can prevent it from loosening, further reduction tuning screw and cover plate binding site little to intermodulation effects, be conducive to further improving tuning effect.
4, facing is overall cylindrical helicoid, end face is rounded, is easy to facing to screw in screwed hole, simultaneously can with the screwed hole of circle in conjunction with fastening, further reduction tuning screw and cover plate binding site little to intermodulation effects, be conducive to further improving tuning effect.
5, resonator and cavity bottom is one-body molded or die cast, does not need to be fixed by screws on cavity, is conducive to further saving material, reducing costs.
6, the position of the corresponding resonator of cavity bottom is provided with fin, the heat produced due to filter is mainly derived from resonant rod, therefore fin is set at the bottom correspondence position of resonator, the heat of resonator generation is conducted with this, reduce the temperature of inside cavity, extend the useful life of filter, ensure the performance of filter, be conducive to further improving tuning effect.
7, the outer surface of pedestal and radiating fin is coated with solidification graphene layer, utilize the thermal conductivity that Graphene is high, the heat that resonant rod produces can carry out face transmission along graphene layer rapidly, be delivered to rapidly fin inside, and be delivered in outside air by fin, shorten resonator to the time needed for fin heat transfer, good heat dissipation effect, is conducive to improving tuning effect further.
8, radiating fin offers several louvres, heat is passed to the external world fast by louvre, increases the area of dissipation of fin, good heat dissipation effect, is conducive to further improving tuning effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of tuning screw of the present utility model;
Fig. 3 is the structural representation of tuning screw of the present utility model removing facing;
Fig. 4 is the structural representation of the facing of tuning screw of the present utility model;
Fig. 5 is the stereogram of fin of the present utility model;
Fig. 6 is the profile of fin of the present utility model.
Embodiment
As shown in Figure 1, be structural representation of the present utility model.
A kind of low frequency high efficiency cavity body filter 100, comprise the cavity 110 of upper end open, dismountable be covered on cavity 110 upper end cover plate 120, the tuning screw 130 being installed on cover plate 120 top, to be installed on bottom cavity 110 and the resonator 140 be oppositely arranged with tuning screw 130, cavity 110 and cover plate 120 bonding by conductive silver glue 150.Bottom cavity 110, the position of corresponding resonator 140 is provided with fin 160.Cover plate 120 offers screwed hole 121, and cover plate 120 lower surface and resonator 140 corresponding section are provided with a ring bodies 170, and tuning screw 130 is oppositely arranged with resonator 140 through ring bodies 170 and screwed hole 121.
As in Figure 2-4, the structural representation of tuning screw of the present utility model, the removing structural representation of facing and the structural representation of facing is respectively.
Tuning screw 130 comprises main body 131, can screw in the screwed hole 121 of cover plate 120 and can with it suitable engagement facing 132 and be arranged at the external screw thread 133 that main body 131 deviates from cavity 110 one end, facing 132 is preset in screwed hole 121, and external screw thread 133 screws in facing 132 and to extrude facing 132, tuning screw 130 is fastened in the screwed hole 121 of cover plate 120.
Resonator 140 comprises the body of rod 141 be installed on bottom cavity 110 and the capacitance sheet 142 being arranged at the body of rod 141 top, and the body of rod 141 is in hollow form, and tuning screw 130 wears cover plate 120 and stretches in the body of rod 141 of hollow form.
On the one hand, resonator 140 is not set up the capacitance disk of round metal plate-like to increase electric capacity, replace is by arranging a ring bodies 170 at cover plate 120 lower surface and resonator 140 corresponding section, the right opposite added between capacitor board amasss, according to capacitance equation: C=(ε * S)/(4 π * k*d), when the long-pending increase of right opposite, electric capacity increases, make when carrying out low frequency and being tuning, be conducive to reducing resonance frequency, improving tuning effect, simultaneously relative to resonator 140 cutting forming with capacitance disk, save material, be conducive to reducing costs, second aspect, when C mono-timing, because S increases, then the distance d between capacitor board reduces, and can reduce the distance between tuning screw 130 and resonator 140, is conducive to the miniaturization realizing product, the third aspect, by the facing 132 of tuning screw 130 is preset in screwed hole 121, being screwed in by external screw thread 133 end of main body 131 is provided with in the screwed hole 121 of facing 132 again, and extrude facing 132, tuning screw 130 is made to be fastened in the screwed hole 121 of cover plate 120 by the frictional force of both sides inside and outside facing 132 thus to realize self-locking, do not need by nut, tuning screw 130 to be arranged on cover plate 120, be conducive to further saving material, reduce costs, and by facing 132, closely cooperating between external screw thread 133 and screwed hole 121, make to combine between cover plate 120 and tuning screw 130 closely, tuning screw 130 is little to intermodulation effects with cover plate 120 binding site, resonance frequency is little, be conducive to improving tuning effect, fourth aspect, resonator 140 comprises the body of rod 141 be installed on bottom cavity 110 and the capacitance sheet 142 being arranged at the body of rod 141 top, the body of rod 141 is in hollow form, stretch in the body of rod 141 of hollow form because tuning screw 130 wears cover plate 120, further reduce the distance d between capacitor board, increase right opposite and amass S, be conducive to increasing structure capacitive, improve tuning effect.
Cavity 110 is bonding by conductive silver glue 150 with cover plate 120, and seal chamber 110 and the joint face of cover plate 120, prevent electromagnetic leakage, improve tuning effect further.
Facing 132 is the elastic component be made up of nylon, nylon not only has certain elasticity, also has certain rigidity, facing 132 and the frictional force between screwed hole 121 and external screw thread 133 can be ensured, ensure the reliability connected, external screw thread 133 screws in and makes facing 132 produce deformation and engage with it, certain deformation will be produced when facing 132 is assembled in the screwed hole 121 of cover plate 120 or when assembling with main body 131 phase of tuning screw, as stretched, thus the main body 131 of tuning screw 130 is not easily skidded, firm connection, and can prevent it from loosening, further reduction tuning screw 130 is little to intermodulation effects with cover plate 120 binding site, be conducive to further improving tuning effect.
Facing 132 is overall cylindrical helicoid, end face is rounded, is easy to facing 132 to screw in screwed hole 121, simultaneously can with the screwed hole 121 of circle in conjunction with fastening, further reduction tuning screw 130 is little to intermodulation effects with cover plate 120 binding site, is conducive to further improving tuning effect.
One-body molded or die cast bottom resonator 140 and cavity 110, does not need to be fixed by screws on cavity 110, is conducive to further saving material, reducing costs.
As shown in Figure 5 and Figure 6, stereogram and the profile of fin of the present utility model is respectively.
Several radiating fins 162 that fin 160 comprises pedestal 161 and extends from pedestal 161 side, one end that radiating fin 162 deviates from pedestal 161 wears stretches out cavity 110 base plate, and the outer surface of pedestal 161 and radiating fin 162 is coated with solidification graphene layer.Pedestal 161 is circular, and radiating fin 162 is bar shaped and is evenly laid in pedestal 161 circumferentially.Radiating fin 162 offers several louvres 163.
Bottom cavity 110, the position of corresponding resonator 140 is provided with fin 160, the heat produced due to filter 100 is mainly derived from resonant rod, therefore fin 160 is set at the bottom correspondence position of resonator 140, the heat of resonator 140 generation is conducted with this, reduce the temperature of cavity 110 inside, extend the useful life of filter 100, ensure the performance of filter 100, be conducive to further improving tuning effect.
The outer surface of pedestal 161 and radiating fin 162 is coated with solidification graphene layer, utilize the thermal conductivity that Graphene is high, the heat that resonant rod produces can carry out face transmission along graphene layer rapidly, be delivered to rapidly fin 160 inner, and be delivered in outside air by fin 160, shorten resonator 140 to conduct heat the required time to fin 160, good heat dissipation effect, be conducive to further improving tuning effect.
Radiating fin 162 offers several louvres 163, heat is passed to the external world fast by louvre 163, increases the area of dissipation of fin 160, good heat dissipation effect, is conducive to further improving tuning effect.
Operation principle of the present utility model is:
First, resonator 140 and cavity 110 is produced by mode that is one-body molded or die cast, bottom cavity 110, one fin 160 is set with resonator 140 correspondence position, cover plate 120 is offered a screwed hole 121, and a ring bodies 170 is installed in cover plate 120 bottom surface and resonator 140 corresponding section, and cover plate 120 is bonded in cavity 110 top by conductive silver glue 150; Then, the facing 132 of tuning screw 130 is placed in screwed hole 121, tuning screw 130 is penetrated screwed hole 121 above cover plate 120 and to stretch into the body of rod 141 of resonator 140 inner; Then carry out tuning, by the screw-in gradually of tuning screw 130, thus change the distance of tuning screw 130 and resonator 140, the parameter realizing filter 100 is tuning; Finally, after tuning, extruding facing 132, makes tuning screw 130 to be fastened in the screwed hole 121 of cover plate 120 by the frictional force of both sides inside and outside facing 132 thus to realize self-locking.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, 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 (8)
1. a low frequency high efficiency cavity body filter, is characterized in that: comprise the cavity of upper end open, dismountable be covered on cavity upper end cover plate, the tuning screw being installed on cover plate top, be installed on cavity bottom and the resonator be oppositely arranged with tuning screw; Described cover plate offers screwed hole, and cover plate lower surface and resonator corresponding section are provided with a ring bodies, and described tuning screw passes screwed hole and ring bodies and resonator and is oppositely arranged; Described tuning screw comprises main body, the screwed hole of described cover plate can be screwed in and can with it suitable engagement facing and be arranged at the external screw thread that main body deviates from cavity one end, described facing is preset in screwed hole, described in screw in facing and make tuning screw be fastened in the screwed hole of cover plate to extrude facing; Described resonator comprises the body of rod being installed on cavity bottom and the capacitance sheet being arranged at body of rod top, and the described body of rod is hollow form, and described tuning screw wears cover plate and stretches in the body of rod of hollow form.
2. a kind of low frequency high efficiency cavity body filter according to claim 1, is characterized in that: described cavity is bonding by conductive silver glue with described cover plate.
3. a kind of low frequency high efficiency cavity body filter according to claim 2, is characterized in that: described facing is nylon elastic part, described in screw into and make facing produce deformation engaging with it.
4. a kind of low frequency high efficiency cavity body filter according to claim 3, is characterized in that: described facing is overall cylindrical helicoid.
5. a kind of low frequency high efficiency cavity body filter according to claim 4, is characterized in that: described resonator and cavity bottom is one-body molded or die cast.
6. a kind of low frequency high efficiency cavity body filter according to claim 5, is characterized in that: the position of the corresponding resonator of described cavity bottom is provided with fin; Several radiating fins that described fin comprises pedestal and extends from pedestal side, one end that described radiating fin deviates from pedestal wears stretches out well floor, and the outer surface of described pedestal and radiating fin is coated with solidification graphene layer.
7. a kind of low frequency high efficiency cavity body filter according to claim 6, is characterized in that: described pedestal is for circular, and described radiating fin is bar shaped and is evenly laid in pedestal circumferentially.
8. a kind of low frequency high efficiency cavity body filter according to claim 7, is characterized in that: described radiating fin offers several louvres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775635.9U CN205069823U (en) | 2015-09-30 | 2015-09-30 | High -efficient cavity filter of low frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775635.9U CN205069823U (en) | 2015-09-30 | 2015-09-30 | High -efficient cavity filter of low frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205069823U true CN205069823U (en) | 2016-03-02 |
Family
ID=55396335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520775635.9U Expired - Fee Related CN205069823U (en) | 2015-09-30 | 2015-09-30 | High -efficient cavity filter of low frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205069823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534854A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of Novel Filter frequency reducing structure |
-
2015
- 2015-09-30 CN CN201520775635.9U patent/CN205069823U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534854A (en) * | 2019-07-26 | 2019-12-03 | 苏州诺泰信通讯有限公司 | A kind of Novel Filter frequency reducing structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205069821U (en) | Cavity filter | |
| WO2015070450A1 (en) | Resonator, filter, duplexer and multiplexer | |
| CN204927470U (en) | Miniaturized cavity filter | |
| CN204927469U (en) | Novel cavity filter | |
| CN203119067U (en) | Cavity filter | |
| CN104885293A (en) | Resonator, filter, duplexer, multiplexer and communication device | |
| CN104900952A (en) | Coupling structure of dual-mode medium resonator and metal resonator | |
| CN204927465U (en) | Cavity filter that reliability is high | |
| CN206461092U (en) | A kind of radiator antenna | |
| CN205069823U (en) | High -efficient cavity filter of low frequency | |
| CN101807736A (en) | Cavity filter, cavity filter cover plate and tuning screw self-locking device | |
| CN201038287Y (en) | Coaxial cavity filter | |
| CN201966312U (en) | TM (Transverse Magnetic) mode dielectric filter | |
| CN202564517U (en) | Novel low frequency cavity filter | |
| CN202217778U (en) | A TM mode dielectric resonator with two ends connected with a ground | |
| CN105552495A (en) | Bottom-debugging cavity filter | |
| CN204230392U (en) | A kind of filter | |
| CN103268970A (en) | Adjustable slow-wave device based on microstrip line | |
| CN203406399U (en) | Cavity filter with rotatable and adjustable loop | |
| CN205452496U (en) | Bottom debugging type cavity filter | |
| CN201412426Y (en) | Screw device and chamber wave filter applying same | |
| CN205609715U (en) | Cavity filter cover plate | |
| CN203707299U (en) | Cavity filter | |
| CN204067526U (en) | There is the coaxial cavity filter of transmission zero structure | |
| CN207852877U (en) | A kind of microminiature 5G filters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180313 Address after: 518000 Shenzhen Baoan District Songgang street Baoan District Songgang street Luotian community Third Industrial Zone No. 8 Jaguar electronic G Building 2 layer 201 Patentee after: Shenzhen city high goochi Technology Co. Ltd. Address before: 523000 Guangdong province Dongguan city of Songshan high and New Technology Industrial Development Zone new and high tech park, No. 1 Building 5 building 512-514 Patentee before: Li Dengfeng |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20200930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |