CN102544656A - Cavity filter - Google Patents
Cavity filter Download PDFInfo
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- CN102544656A CN102544656A CN2012100268177A CN201210026817A CN102544656A CN 102544656 A CN102544656 A CN 102544656A CN 2012100268177 A CN2012100268177 A CN 2012100268177A CN 201210026817 A CN201210026817 A CN 201210026817A CN 102544656 A CN102544656 A CN 102544656A
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- cavity
- radiating plate
- metal heat
- heat radiating
- filter
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Abstract
The invention belongs to the technical field of electrical elements for the communication industry and particularly relates to a cavity filter. The cavity filter comprises a cavity, a cavity cover plate and a resonant pole, wherein the cavity is made of plastics; a metal heat-radiating plate is arranged on the outer surface of the bottom part of the cavity; and the bottom end of the resonant pole is connected with the metal heat-radiating plate. The cavity filter has the beneficial effects that the heat accumulated inside the plastic cavity is effectively reduced, and as the plastic cavity is adopted in a high-power filter, the good electrical performance can be kept; through field test experiment, the heat inside the plastic cavity in a frequency band filter with an average power of above 120 W can be immediately radiated to a space outside the cavity to reduce the temperature inside the plastic cavity and keep good electrical performance; and meanwhile, through a structure and a connection manner of the metal heat-conducting piece with the metal heat-radiating plate and the resonant pole, the production cost of the filter can be greatly reduced, and the assembly and the manufacture are easy.
Description
Technical field
The invention belongs to the communications industry with electric Element Technology field, be specifically related to a kind of cavity body filter.
Background technology
Usually adopt the interference signal or the noise signal filtering of cavity body filter in the communication system with particular frequency range; Existing cavity body filter generally adopts precious metals such as aluminium, copper to make, not only weight big, be unfavorable for installing, dismounting and transportation, and because the price of precious metal is higher; Cause the cost of cavity body filter higher; Therefore, each tame filter manufacturer all constantly opens up new technology and new technology dropping into great effort, to alleviate the enterprise production cost.Fall in this programme various; The scheme that adopts plastic material to make filter cavity is a kind of relatively reasonable plan; The relative metal filter cavity of this scheme; Because plastic chamber has lighter weight, stronger rigid nature, be not vulnerable to the influence that ambient temperature changes, and more and more receive the attention of each tame filter manufacturer.
But the heat-conductive characteristic of plastics is than metal difference, and in the cavity body filter use, accumulating in the inner heat of plastic chamber can not in time distribute, and can cause local temperature increasingly high and the cavity body filter allomeric function was lost efficacy; Especially for high power filter; More heat transfer can be gathered at short notice in plastic chamber inside, can not in time distribute, and causes the electricity function index of cavity body filter to descend; Can not satisfy the demand of work; In the existing cavity body filter, can only in the filter of small frequency very, use plastic chamber, powerful slightly filter; The scheme that at all can't adopt plastic chamber is to reduce the pressure of enterprise production cost, and the heat dissipation problem of plastic chamber is seriously restricting the development process of cavity body filter all the time.
Summary of the invention
The purpose of this invention is to provide a kind of production cost that can not only reduce filter, and heat dissipation problem that can fine solution plastic filter, and the cavity body filter with good electric property.
For realizing above-mentioned purpose, a kind of cavity body filter of the present invention's design comprises cavity, cavity cover plate resonant bar, and said cavity is a plastic material, and the bottom outer surface of said cavity is provided with metallic heat radiating plate, and the bottom of said resonant rod is connected with metallic heat radiating plate.
Further, the end of said resonant rod is connected with metallic heat radiating plate through metal heat-conducting spare.
Further, said resonant rod and metal heat-conducting spare are one-body molded, and said metal heat-conducting spare is embedded on the bottom surface of cavity, and said metallic heat radiating plate is connected with metal heat-conducting spare through screw.
Further, said resonant rod, metal heat-conducting spare and metallic heat radiating plate are one-body molded.
Again further; The junction of said resonant rod and metal heat-conducting spare is provided with boss; The lower surface of said boss and the bottom interior surface of cavity are fitted; The cross-sectional area of said metallic heat radiating plate is greater than the cross-sectional area of metal heat-conducting spare, and the upper surface of metallic heat radiating plate and the bottom outer surface of cavity are fitted.
Further, be connected with the metal resonance plate on the said resonant rod.
Again further, said metal heat-conducting spare and metallic heat radiating plate are one-body molded, and metal heat-conducting spare passes the bottom surface of cavity, and said resonant rod is connected through fixture with metal heat-conducting spare.
Further, said resonant rod lower end is provided with the inner convex platform that is used for positioning mounting.
The present inventor finds following rule through experiment constantly, and in the filter course of work, the main origin of heat of inside cavity is in resonant rod; Based on this rule, the present invention is connected the bottom of resonant rod with metal heat-conducting spare, and metal heat-conducting spare is connected with the metallic heat radiating plate that is positioned at chamber outer surface; Utilize the high characteristic of metal heat-conducting rate; Most of heat that plastic chamber is inner conducts and is dispersed into the space of plastic chamber exterior circumferential, effectively reduces the heat of plastic chamber accumulated inside, and in high power filter, adopts plastic chamber; Can keep electric property well; Through the on-the-spot test experiment, be in the frequency band filter more than the 120W in average power, the inner heat of plastic chamber can in time be radiated the outside space of cavity and reduce the plastic chamber temperature inside; The electric property of getting ready; Structure, the connected mode of metal heat-conducting spare of the present invention and metallic heat radiating plate and resonant rod can reduce the production cost of filter greatly simultaneously, and are easy to assembling, manufacturing.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is the structural representation of the embodiment of the invention 2;
Fig. 3 is the structural representation of the embodiment of the invention 3;
Among the figure: 1-cavity, 2-cavity cover plate, 3-resonant rod, 4-metallic heat radiating plate, 5-metal heat-conducting spare, 6-boss, 7-inner convex platform, 8-resonance plate, the tuning screw rod of 9-, 10-resonant cavity, 11-annular boss, 12-screw, 13-bolt.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is made further detailed description:
Overall plan of the present invention is; Bottom outer surface at cavity is provided with metallic heat radiating plate, the bottom of resonant rod is connected with metallic heat radiating plate, through the bigger metallic heat radiating plate of area; The heat that plastic chamber is inner is dispersed into the cavity outside, reduces the temperature inside of plastic chamber.
Cavity body filter as shown in Figure 1, cavity body filter comprise cavity 1, cavity cover plate 2 resonant bars 3, and cavity cover plate 2 covers on cavity 1; And, a plurality of resonant cavitys 10 are arranged in the cavity 1 through being bolted on the cavity 1, be provided with a resonant rod 3 in each resonant cavity 10; Resonant rod 3 centers are empty; Tuning screw rod 9 is installed on the cavity cover plate 2, and the lower end of tuning screw rod 9 is hollow over against resonant rod 3, so that regulate the operating frequency of filter; Cavity 1 is a plastic material; Cavity cover plate 2, resonant rod 3, tuning screw rod 9 all adopt metal material to make, and are provided with a metallic heat radiating plate 4 at the bottom outer surface of cavity 1, and the upper surface of metallic heat radiating plate 4 is close on the bottom surface of cavity 1; The size of metallic heat radiating plate 4 and shape equate with the bottom surface of cavity 1; The end of every resonant rod 3 is connected with the metallic heat radiating plate 4 of cavity 1 bottom through a metal heat-conducting spare 5, can an one-body molded cross section be less than the metal heat-conducting spare 5 of resonant rod 3 in the lower end of every resonant rod 3, and the bottom surface of cavity 1 is provided with through hole with every resonant rod 3 corresponding positions; Metal heat-conducting spare 5 passes through hole and contacts with metallic heat radiating plate 4, metallic heat radiating plate 4 is connected with metal heat-conducting spare 5, resonant rod 3 and is fixed together through screw 12.
On cavity 1 bottom surface of present embodiment cavity body filter a block of metal heating panel 4 is set, the bottom surface of cavity 1 and metallic heat radiating plate 4 integrated injection moldings.
Every resonant rod 3 is connected with metallic heat radiating plate 4 through metal heat-conducting spare 5, and the area of metallic heat radiating plate 4 is bigger, and rapid heat dissipation can reduce the temperature inside of plastic chamber well.
One loop boss 11 is set in the bottom of every resonant rod 3; The lower end of resonant rod 3 contacts with annulus with the upper surface of the bottom surface of cavity 1; Under the rough situation of upper surface of cavity 1 bottom surface, resonant rod 3 is contacted with the upper surface of cavity 1 bottom surface, reduced the manufacturing technique requirent of cavity 1; Reduced production cost, the cavity body filter of present embodiment is suitable for indoor use.
Cavity body filter as shown in Figure 2 is single cavity filter, comprises cavity 1, cavity cover plate 2 resonant bars 3; Cavity cover plate 2 covers on cavity 1, and through being bolted on the cavity 1, a resonant cavity 10 is arranged in the cavity 1; Resonant rod 3 is positioned at resonant cavity 10, and resonant rod 3 centers are empty, and tuning screw rod 9 is installed on the cavity cover plate 2; The lower end of tuning screw rod 9 is hollow over against resonant rod 3; So that regulate the operating frequency of filter, cavity 1 is a plastic material, and cavity cover plate 2, resonant rod 3, tuning screw rod 9 all adopt metal material to make.The end of resonant rod 3 is connected with metallic heat radiating plate 4 through metal heat-conducting spare 5, and metallic heat radiating plate 4 is positioned at the bottom outer surface of cavity 1, and the upper surface of metallic heat radiating plate 4 is close on the bottom surface of cavity 1.
The bottom of resonant rod 3 connects metal heat-conducting spare 5 and metallic heat radiating plate 4; Metallic heat radiating plate 4 is a circular metal plate; Resonant rod 3, metal heat-conducting spare 5 and metallic heat radiating plate 4 are one-body molded, and metal heat-conducting spare 5, metallic heat radiating plate 4 are injected into cavity 1 bottom surface, and resonant rod 3 is provided with boss 6 with the junction of metal heat-conducting spare 5; The bottom interior surface of the lower surface of boss 6 and cavity 1 is fitted; The cross-sectional area of metallic heat radiating plate 4 is greater than the cross-sectional area of metal heat-conducting spare 5, and the bottom outer surface that makes metallic heat radiating plate 4 be positioned at cavity 1 can be located well, and the bottom outer surface of the upper surface of metallic heat radiating plate 4 and cavity 1 is fitted.
The lower end of resonant rod 3 contacts with annulus with the upper surface of the bottom surface of cavity 1; Under the rough situation of upper surface of cavity 1 bottom surface; Resonant rod 3 is contacted with the upper surface of cavity 1 bottom surface, reduced the manufacturing technique requirent of cavity 1, reduce production cost; The cavity body filter of present embodiment is suitable for outdoor application, and is applicable to that service band is the cavity body filter of 900M-3.5G.
Cavity body filter as shown in Figure 3 is single cavity filter, comprises cavity 1, cavity cover plate 2 resonant bars 3; Cavity cover plate 2 covers on cavity 1, and through being bolted on the cavity 1, a resonant cavity 10 is arranged in the cavity 1; Resonant rod 3 is positioned at resonant cavity 10, and resonant rod 3 centers are empty, and tuning screw rod 9 is installed on the cavity cover plate 2; The lower end of tuning screw rod 9 is hollow over against resonant rod 3; So that regulate the operating frequency of filter, cavity 1 is a plastic material, and cavity cover plate 2, resonant rod 3, tuning screw rod 9 all adopt metal material to make.The end of resonant rod 3 is connected with metallic heat radiating plate 4 through metal heat-conducting spare 5, and metallic heat radiating plate 4 is positioned at the bottom outer surface of cavity 1, and the upper surface of metallic heat radiating plate 4 is close on the outer surface of bottom surface of cavity 1.
Connect metal resonance plate 8 in resonant rod 3 upper ends; The bottom of resonant rod 3 connects metal heat-conducting spare 5 and metallic heat radiating plate 4; Metallic heat radiating plate 4 is a circular metal plate; The cross-sectional area of metallic heat radiating plate 4 is greater than the cross-sectional area of metal heat-conducting spare 5, and metal heat-conducting spare 5 is one-body molded with metallic heat radiating plate 4, the bottom surface of cavity 1 and metallic heat radiating plate 4 integrated injection moldings.During making; Metal heat-conducting spare 5, metallic heat radiating plate 4 are injected into cavity 1 bottom surface; Be provided with the inner convex platform 7 that is used for positioning mounting in resonant rod 3 lower ends, bolt 13 from the upper end hollow position of resonant rod 3 toward held, and is tighted a bolt 13; Correct on the bolt 13 and be stuck in location on the inner convex platform 7, resonant rod 3 is fixing with metal heat-conducting spare 5.
The lower end of resonant rod 3 contacts with annulus with the upper surface of the bottom surface of cavity 1; Reduced the manufacturing technique requirent of cavity 1; Reduced production cost, the cavity body filter of present embodiment is suitable for outdoor application, owing to connect metal resonance plate 8 in resonant rod 3 upper ends; Can be applicable to that service band is the cavity body filter of 300M-900M through the size of regulating metal resonance plate 8, the depth adjustment filter frequency of utilization of cavity.
Metallic heat radiating plate 4 of the present invention can use heat conductivility aluminium material preferably with metal heat-conducting spare 5.
The content of not doing in this specification to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (8)
1. cavity body filter; Comprise cavity (1), cavity cover plate (2) resonant bar (3); Said cavity (1) is a plastic material, it is characterized in that: the bottom outer surface of said cavity (1) is provided with metallic heat radiating plate (4), and the bottom of said resonant rod (3) is connected with metallic heat radiating plate (4).
2. cavity body filter according to claim 1 is characterized in that: the end of said resonant rod (3) is connected with metallic heat radiating plate (4) through metal heat-conducting spare (5).
3. cavity body filter according to claim 2; It is characterized in that: said resonant rod (3) is one-body molded with metal heat-conducting spare (5); Said metal heat-conducting spare (5) is embedded on the bottom surface of cavity (1), and said metallic heat radiating plate (4) is connected with metal heat-conducting spare (5) through screw.
4. cavity body filter according to claim 2 is characterized in that: said resonant rod (3), metal heat-conducting spare (5) and metallic heat radiating plate (4) are one-body molded.
5. cavity body filter according to claim 4; It is characterized in that: said resonant rod (3) is provided with boss (6) with the junction of metal heat-conducting spare (5); The bottom interior surface of the lower surface of said boss (6) and cavity (1) is fitted; The cross-sectional area of said metallic heat radiating plate (4) is greater than the cross-sectional area of metal heat-conducting spare (5), and the bottom outer surface of the upper surface of metallic heat radiating plate (4) and cavity (1) is fitted.
6. cavity body filter according to claim 2 is characterized in that: said resonant rod (3) upper end is connected with metal resonance plate (8).
7. the cavity body filter of stating according to claim 6 is characterized in that: said metal heat-conducting spare (5) and metallic heat radiating plate (4) are one-body molded, and metal heat-conducting spare (5) passes the bottom surface of cavity (1), and said resonant rod (3) is connected through fixture with metal heat-conducting spare (5).
8. according to claim 6 or 7 described cavity body filters, it is characterized in that: said resonant rod (3) lower end is provided with the inner convex platform (7) that is used for positioning mounting.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100268177A CN102544656A (en) | 2012-02-08 | 2012-02-08 | Cavity filter |
| PCT/CN2012/078501 WO2013117074A1 (en) | 2012-02-08 | 2012-07-11 | High-frequency band high-power plastic cavity filter |
| PCT/CN2012/078492 WO2013117073A1 (en) | 2012-02-08 | 2012-07-11 | Cavity filter |
| PCT/CN2012/078474 WO2013117072A1 (en) | 2012-02-08 | 2012-07-11 | Mid-frequency band high-power cavity filter |
| PCT/CN2012/078527 WO2013117075A1 (en) | 2012-02-08 | 2012-07-12 | Indoor-use multi-cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100268177A CN102544656A (en) | 2012-02-08 | 2012-02-08 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102544656A true CN102544656A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100268177A Pending CN102544656A (en) | 2012-02-08 | 2012-02-08 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102544656A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013117074A1 (en) * | 2012-02-08 | 2013-08-15 | 武汉凡谷电子技术股份有限公司 | High-frequency band high-power plastic cavity filter |
| CN104485496A (en) * | 2014-12-19 | 2015-04-01 | 云南云天化股份有限公司 | Material for filter chamber and filter chamber |
| EP3561948A4 (en) * | 2017-01-13 | 2019-12-25 | Huawei Technologies Co., Ltd. | Cavity resonator, filter and communication device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007009532A1 (en) * | 2005-07-20 | 2007-01-25 | Matsushita Electric Industrial Co., Ltd. | Plastic combine filter with metal post to increase heat dissipation |
| CN101069321B (en) * | 2004-12-03 | 2010-05-05 | 摩托罗拉公司 | Radio frequency cavity resonatory with heat transport apparatus |
| CN102044730A (en) * | 2010-12-06 | 2011-05-04 | 武汉凡谷电子技术股份有限公司 | Transverse magnetic (TM) mode dielectric filter |
| EP2323214A1 (en) * | 2009-11-16 | 2011-05-18 | Alcatel Lucent | Device for filtering radio frequency signals, coaxial air cavity filter, and manufacturing method thereof |
| CN202058842U (en) * | 2011-04-22 | 2011-11-30 | 武汉凡谷电子技术股份有限公司 | Cold-heading resonance rod |
| CN202454699U (en) * | 2012-02-08 | 2012-09-26 | 武汉凡谷电子技术股份有限公司 | Cavity filter |
-
2012
- 2012-02-08 CN CN2012100268177A patent/CN102544656A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069321B (en) * | 2004-12-03 | 2010-05-05 | 摩托罗拉公司 | Radio frequency cavity resonatory with heat transport apparatus |
| WO2007009532A1 (en) * | 2005-07-20 | 2007-01-25 | Matsushita Electric Industrial Co., Ltd. | Plastic combine filter with metal post to increase heat dissipation |
| EP2323214A1 (en) * | 2009-11-16 | 2011-05-18 | Alcatel Lucent | Device for filtering radio frequency signals, coaxial air cavity filter, and manufacturing method thereof |
| CN102044730A (en) * | 2010-12-06 | 2011-05-04 | 武汉凡谷电子技术股份有限公司 | Transverse magnetic (TM) mode dielectric filter |
| CN202058842U (en) * | 2011-04-22 | 2011-11-30 | 武汉凡谷电子技术股份有限公司 | Cold-heading resonance rod |
| CN202454699U (en) * | 2012-02-08 | 2012-09-26 | 武汉凡谷电子技术股份有限公司 | Cavity filter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013117074A1 (en) * | 2012-02-08 | 2013-08-15 | 武汉凡谷电子技术股份有限公司 | High-frequency band high-power plastic cavity filter |
| WO2013117072A1 (en) * | 2012-02-08 | 2013-08-15 | 武汉凡谷电子技术股份有限公司 | Mid-frequency band high-power cavity filter |
| WO2013117075A1 (en) * | 2012-02-08 | 2013-08-15 | 武汉凡谷电子技术股份有限公司 | Indoor-use multi-cavity filter |
| WO2013117073A1 (en) * | 2012-02-08 | 2013-08-15 | 武汉凡谷电子技术股份有限公司 | Cavity filter |
| CN104485496A (en) * | 2014-12-19 | 2015-04-01 | 云南云天化股份有限公司 | Material for filter chamber and filter chamber |
| EP3561948A4 (en) * | 2017-01-13 | 2019-12-25 | Huawei Technologies Co., Ltd. | Cavity resonator, filter and communication device |
| US10978775B2 (en) | 2017-01-13 | 2021-04-13 | Huawei Technologies Co., Ltd. | Cavity resonator, filter, and communications device |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |