CN103700912B - Cavity body filter and cover plate thereof - Google Patents
Cavity body filter and cover plate thereof Download PDFInfo
- Publication number
- CN103700912B CN103700912B CN201310754225.1A CN201310754225A CN103700912B CN 103700912 B CN103700912 B CN 103700912B CN 201310754225 A CN201310754225 A CN 201310754225A CN 103700912 B CN103700912 B CN 103700912B
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- tuning screw
- cover plate
- cavity
- screw hole
- hole
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/58—Structural electrical arrangements for semiconductor devices not otherwise provided for, e.g. in combination with batteries
- H01L23/64—Impedance arrangements
- H01L23/66—High-frequency adaptations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2223/00—Details relating to semiconductor or other solid state devices covered by the group H01L23/00
- H01L2223/58—Structural electrical arrangements for semiconductor devices not otherwise provided for
- H01L2223/64—Impedance arrangements
- H01L2223/66—High-frequency adaptations
- H01L2223/6661—High-frequency adaptations for passive devices
- H01L2223/6677—High-frequency adaptations for passive devices for antenna, e.g. antenna included within housing of semiconductor device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a kind of cavity body filter and cover plate thereof. This cavity body filter includes cover plate, cavity, tuning screw, cover plate capping cavity, cover plate is provided with tuning screw hole, tuning screw stretches into cavity through cover plate, tuning screw hole is provided with screwed hole section and via segments along its axis direction, being provided with screw thread on the inwall of screwed hole section to threaded with tuning screw, the inwall of via segments connects near the aperture of cavity side with tuning screw hole, forms electric capacity between inwall and the tuning screw of via segments. By the way, cavity body filter provided by the invention is introduced the effect of capacity plate antenna on its cover plate, reduce the electric current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw produces with cover plate loose contact, improve the intermodulation first-pass yield of cavity body filter.
Description
Technical field
The present invention relates to signal intermodulation technical field, particularly relate to a kind of cavity body filter and cover plate thereof.
Background technology
The concept of intermodulation refers to two different frequency signals, superposition in a certain system and the signal of new frequency that produces. When this signal drops in frequency acceptance band, normally receiving of telecommunication apparatus will be affected. When this system is passive system, it is called Passive Nonlinear intermodulation. Passive intermodulation is mainly produced (such as cable, adapter, wave filter etc.) by passive non-linear device, and the generation of Passive Nonlinear intermodulation generally has two kinds of reasons: a class be metal contact cause non-linear, another kind of is the inherent nonlinearity of material itself. Wherein the first kind is the main cause producing intermodulation, and compares and be difficult to resolve certainly, now substantially with intermodulation as weighing the nonlinear index of device.
In prior art designs, cover plate and tuning screw by the screw thread in the tuning screw hole on cover plate effectively in conjunction with time, the thread segment thickness in tuning screw hole is no better than tuning screw hole gross thickness. Therefore, tuning screw is very big with the electric current density of cover plate binding site, and again because of screw thread always helical form, last half-turn screw thread on the cover board always has end, and this last half-turn screw thread can not well be combined closely with cover plate. Cause that tuning screw and cover plate binding site are very big to intermodulation effects so that the intermodulation first-pass yield of cavity body filter is very poor.
Accordingly, it is desirable to provide a kind of cavity body filter and cover plate thereof, to solve the problems referred to above.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of cavity body filter and cover plate thereof, it is possible to solve the problem that cavity body filter causes the intermodulation first-pass yield of cavity body filter very poor because of the combination of cover plate Yu tuning screw.
For solving above-mentioned technical problem, the technical scheme that the present invention adopts is: provide a kind of cavity body filter, including cover plate, cavity, tuning screw, cover plate capping cavity, cover plate is provided with tuning screw hole, tuning screw stretches into cavity through cover plate, tuning screw hole is provided with screwed hole section and via segments along its axis direction, the inwall of screwed hole section is provided with screw thread threaded with tuning screw, the inwall of via segments connects near the aperture of cavity side with tuning screw hole, forms electric capacity between inwall and the tuning screw of via segments;Wherein, the ratio between axial length and the axial length in described tuning screw hole of the described screwed hole in described tuning screw hole is N:M, wherein M > N, M > 2mm, N > 1mm.
Wherein, via is straight hole.
Wherein, via is taper hole.
Wherein, the diameter of via 0.2mm to 3mm bigger than the diameter of screwed hole.
Wherein, cover plate is provided externally with boss, and screwed hole prolongs it and axially extends through boss to containment portion.
Wherein, the ratio between axial length and the axial length in tuning screw hole of tuning screw hole screwed hole is 3:5.
Wherein, cavity filter cover board is additionally provided with coupling screw hole and cover screw hole.
For solving above-mentioned technical problem, the technical scheme that the present invention adopts is: provide a kind of cavity filter cover board, this cover plate is used for covering filter cavity, cover plate is provided with tuning screw hole, tuning screw hole is used for plugging tuning screw and making tuning screw stretch into cavity, it is characterized in that, tuning screw hole is provided with screwed hole section and via segments along its axis direction, the inwall of screwed hole section is provided with screw thread threaded with tuning screw, the inwall of via segments connects near the aperture of cavity side with tuning screw hole, electric capacity is formed between inwall and the tuning screw of via segments, wherein, the ratio between axial length and the axial length in described tuning screw hole of the described screwed hole in described tuning screw hole is N:M, wherein M > N, M > 2mm, N > 1mm.
The invention has the beneficial effects as follows: be different from the situation of prior art, tuning screw hole on cavity body filter provided by the invention and cover plate thereof is provided with screwed hole section and via segments along its axis direction, the inwall of screwed hole section is provided with screw thread threaded with tuning screw, the inwall of via segments connects near the aperture of cavity side with tuning screw hole, electric capacity is formed between inwall and the tuning screw of via segments, make cover plate is introduced the effect of capacity plate antenna, reduce the electric current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw produces with cover plate loose contact, improve the intermodulation first-pass yield of cavity body filter.
Accompanying drawing explanation
Fig. 1 is the part isometric view of the cover plate of the cavity body filter of first embodiment of the invention;
Fig. 2 is the front view of the cover plate of the cavity body filter in Fig. 1;
Fig. 3 is the cross sectional view along B-B of the cover plate of the cavity body filter in Fig. 2.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be described in detail.
The present invention provides a kind of cavity body filter, including cover plate, cavity, tuning screw, cover plate capping cavity, cover plate is provided with tuning screw hole, tuning screw stretches into cavity through cover plate, and tuning screw hole is provided with screwed hole section and via segments along its axis direction, the inwall of screwed hole section is provided with screw thread and threadeds with tuning screw, the inwall of via segments connects near the aperture of cavity side with tuning screw hole, forms electric capacity between inwall and the tuning screw of via segments.
By the way, cavity body filter provided by the invention is introduced the effect of capacity plate antenna on its cover plate, reduce the electric current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw produces with cover plate loose contact, improve the intermodulation first-pass yield of cavity body filter.
Consulting the part isometric view of cover plate that Fig. 1 and Fig. 2, Fig. 1 are the cavity body filters of first embodiment of the invention, Fig. 2 is the front view of the cover plate of the cavity body filter in Fig. 1.In the present embodiment, the cover plate 10 of cavity body filter includes cover plate main body 11, boss 12, tuning screw hole 13, coupling screw hole 15 and cover screw hole 14.
Boss 12 is arranged at the outside of cover plate 10, and specifically, boss 12 protrudes from cover plate main body 11 and arranges away from the side surface of the cavity of cavity body filter. In the present embodiment, boss 12 and cover plate main body 11 are formed in one structure. Boss 12 can be independent arranging around tuning screw hole 13, it is also possible to setting of being joined together by the boss 12 that multiple tuning screw holes 13 are other. The height of boss 12 can be heightened as required or turn down, and is mainly determined by frequency height and the size that inter-modulated signal is affected. Arranging boss 12 can when ensureing that the sealed fastness of original tuning screw is constant, it is also possible to the thickness of thinning cover plate main body 11, the thickness of indirect thinning cover plate 10, strengthens the being tightly combined property of cover plate 10 and cavity. When adopting mould molding, it is possible to directly reduce material cost and product weight, thus reducing the cost of cavity body filter.
Further regard to the cross sectional view along B-B that Fig. 3, Fig. 3 are the cover plates of cavity body filter in Fig. 2. Tuning screw hole 13 is arranged on cover plate 10, is specially and runs through cover plate main body 11 and arrange with boss 12. Tuning screw hole 13 is provided with screwed hole section 132 and via segments 131 along its axis direction. In the present embodiment, screwed hole section 132 and via segments 131 are coaxially disposed. Being provided with screw thread on the inwall of screwed hole section 132, for threadeding with tuning screw, and the inwall of via segments 131 connects near the aperture of cavity side with tuning screw hole 13. Wherein, the diameter of via segments 131 is more than the diameter of screwed hole section 132, so that forming electric capacity between the inwall of via segments 131 and tuning screw. In general, for realizing the present invention, bigger than the diameter of screwed hole section 132 0.2 millimeter to 3 millimeters of the diameter of via segments 131, can size according to actual needs be adjusted, it is preferred to bigger than the diameter of screwed hole section 132 0.5 millimeter to 1 millimeter of the diameter of via segments 131.
It addition, the ratio between the axial length in the axial length of screwed hole section 132 and tuning screw hole 13 is N:M, wherein M > N, M > 2mm, and N > 1mm. That is, the axial length of screwed hole section 132 is more than 1 millimeter, and the axial length in tuning screw hole 13 is more than 2 millimeters. By the many experiments of the present inventor, draw best results when the ratio between the axial length of screwed hole section 132 and the axial length in tuning screw hole 13 is 3:5.
When cavity body filter works, it is locked between the tuning screw in its cover plate and via and forms electric capacity. Therefore, the via in tuning screw hole is gradually reduced to the electric current on the direction at screwed hole place by aperture, tuning screw hole is only small with the electric current of tuning screw junction, thus reducing the electric current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw produces with cover plate loose contact, improve the intermodulation first-pass yield of cavity body filter.
As an embodiment in tuning screw hole of the present invention, the embodiment of the present embodiment is: tuning screw hole includes a screwed hole and a via, and namely screwed hole section 132 in the above-described embodiments is a screwed hole, and via segments 131 is a via. Further, screwed hole is arranged at the side away from cavity, the tuning screw hole, and via is arranged at the side towards cavity, the tuning screw hole, and screwed hole prolongs it and axially extends through boss to containment portion.
An embodiment as via of the present invention, the embodiment of the present embodiment is: described via is straight hole, straight hole simple in construction, it is easy to processing, the inwall of straight hole is set to light wall, and does not contact with tuning screw, straight hole inwall can and resonant rod between formed capacity plate antenna, reduce the electric current density of tuning screw and binding site place, cover plate bottom surface, thus tuning screw impact on intermodulation is greatly reduced. The present embodiment is only described with the present embodiment via relevant portion, concrete parts or structure, it is possible to reference to the increase and decrease that existing conventional implementation is suitable, be not construed as limiting the invention.
As another embodiment of via of the present invention, the embodiment of the present embodiment is: described via is taper hole. Cone hole machine is simple, it is simple to realizing, the inwall of taper hole is set to light wall, and do not contact with tuning screw, taper hole inwall can and resonant rod between form capacity plate antenna, reduce the electric current density at tuning screw and binding site place, cover plate bottom surface, thus tuning screw impact on intermodulation is greatly reduced. The present embodiment is only described with the present embodiment via relevant portion, concrete parts or structure, it is possible to reference to the increase and decrease that existing conventional implementation is suitable, be not construed as limiting the invention.
The present invention further provides the cover plate of a kind of cavity body filter, the cover plate described in this cover plate such as above-described embodiment.
By the way, tuning screw hole on cavity body filter provided by the invention and cover plate thereof is provided with screwed hole section and via segments along its axis direction, the inwall of screwed hole section is provided with screw thread threaded with tuning screw, the inwall of via segments connects near the aperture of cavity side with tuning screw hole, electric capacity is formed between inwall and the tuning screw of via segments, make cover plate is introduced the effect of capacity plate antenna, reduce the electric current density of tuning screw and cover plate binding site, reduce the inter-modulated signal level because tuning screw produces with cover plate loose contact, improve the intermodulation first-pass yield of cavity body filter.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention 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 the scope of patent protection of the present invention.
Claims (8)
1. a cavity body filter, including cover plate, cavity, tuning screw, described cover plate covers described cavity, described cover plate is provided with tuning screw hole, described tuning screw stretches into described cavity through described cover plate, it is characterized in that, described tuning screw hole is provided with screwed hole section and via segments along its axis direction, the inwall of described screwed hole section is provided with screw thread threaded with described tuning screw, the inwall of described via segments connects near the aperture of described cavity side with described tuning screw hole, electric capacity is formed between inwall and the described tuning screw of described via segments, wherein, the ratio between axial length and the axial length in described tuning screw hole of the described screwed hole in described tuning screw hole is N:M, wherein M > N, M > 2mm, N > 1mm.
2. cavity filter cover board according to claim 1, it is characterised in that described via is straight hole.
3. cavity filter cover board according to claim 1, it is characterised in that described via is taper hole.
4. cavity filter cover board according to claim 1, it is characterised in that the diameter 0.2mm to 3mm bigger than the diameter of described screwed hole of described via.
5. cavity filter cover board according to claim 1, it is characterised in that described cover plate is provided externally with boss, described screwed hole prolongs it and axially extends through boss to containment portion.
6. cavity filter cover board according to claim 1, it is characterised in that the ratio between axial length and the described tuning screw hole axial length of the described screwed hole in described tuning screw hole is 3:5.
7. cavity filter cover board according to claim 1, it is characterised in that be additionally provided with coupling screw hole and cover screw hole on described cavity filter cover board.
8. a cavity filter cover board, it is characterized in that, described cover plate is used for covering filter cavity, described cover plate is provided with tuning screw hole, described tuning screw hole is used for plugging tuning screw and making described tuning screw stretch into described filter cavity, it is characterized in that, described tuning screw hole is provided with screwed hole section and via segments along its axis direction, the inwall of described screwed hole section is provided with screw thread threaded with described tuning screw, the inwall of described via segments connects near the aperture of described filter cavity side with described tuning screw hole, electric capacity is formed between inwall and the tuning screw of described via segments, wherein, the ratio between axial length and the axial length in described tuning screw hole of the described screwed hole in described tuning screw hole is N:M, wherein M > N, M > 2mm, N > 1mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310754225.1A CN103700912B (en) | 2013-12-31 | 2013-12-31 | Cavity body filter and cover plate thereof |
| PCT/CN2014/095051 WO2015101216A1 (en) | 2013-12-31 | 2014-12-26 | Cavity filter and cover plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310754225.1A CN103700912B (en) | 2013-12-31 | 2013-12-31 | Cavity body filter and cover plate thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103700912A CN103700912A (en) | 2014-04-02 |
| CN103700912B true CN103700912B (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310754225.1A Active CN103700912B (en) | 2013-12-31 | 2013-12-31 | Cavity body filter and cover plate thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103700912B (en) |
| WO (1) | WO2015101216A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700912B (en) * | 2013-12-31 | 2016-06-08 | 深圳市大富科技股份有限公司 | Cavity body filter and cover plate thereof |
| CN107851871B (en) * | 2015-06-30 | 2020-08-07 | 华为技术有限公司 | Resonator and filter |
| CN113708031B (en) * | 2020-05-21 | 2023-01-31 | 大富科技(安徽)股份有限公司 | Cavity filter, cavity and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201655936U (en) * | 2010-04-12 | 2010-11-24 | 深圳市大富科技股份有限公司 | Cover plate of cavity filter and cavity filter |
| TWM415429U (en) * | 2011-03-17 | 2011-11-01 | Hon Hai Prec Ind Co Ltd | Cavity filter |
| CN102361116A (en) * | 2011-10-11 | 2012-02-22 | 深圳市大富科技股份有限公司 | Cavity filter and cavity filter cover plate |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2046046B (en) * | 1979-03-19 | 1983-04-20 | Philips Electronic Associated | Microwave oscillator |
| KR101569730B1 (en) * | 2009-03-18 | 2015-11-18 | 주식회사 에이스테크놀로지 | Tuning Bolt Ground Connection Structure and RF Caivity Filter Having the Same |
| CN101964436B (en) * | 2009-07-23 | 2013-07-03 | 深圳市大富科技股份有限公司 | Cavity filter |
| CN202025836U (en) * | 2009-11-13 | 2011-11-02 | 鸿富锦精密工业（深圳）有限公司 | Cavity filter |
| CN201749917U (en) * | 2010-04-12 | 2011-02-16 | 深圳市大富科技股份有限公司 | Cavity filter, cavity filter cover plate and tuning screw self-locking device |
| CN202308238U (en) * | 2011-10-11 | 2012-07-04 | 深圳市大富科技股份有限公司 | Cavity filter and cavity filter cover plate |
| CN102683773B (en) * | 2012-04-28 | 2014-07-09 | 华为技术有限公司 | Adjustable filter and duplexer comprising same |
| CN203013892U (en) * | 2012-11-23 | 2013-06-19 | 京信通信***（中国）有限公司 | Cavity filter and tuner thereof |
| CN203351721U (en) * | 2013-04-16 | 2013-12-18 | 深圳光启创新技术有限公司 | Cavity filter |
| CN103280617B (en) * | 2013-05-15 | 2015-04-01 | 成都联帮微波通信工程有限公司 | Small cavity filter |
| CN103700912B (en) * | 2013-12-31 | 2016-06-08 | 深圳市大富科技股份有限公司 | Cavity body filter and cover plate thereof |
-
2013
- 2013-12-31 CN CN201310754225.1A patent/CN103700912B/en active Active
-
2014
- 2014-12-26 WO PCT/CN2014/095051 patent/WO2015101216A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201655936U (en) * | 2010-04-12 | 2010-11-24 | 深圳市大富科技股份有限公司 | Cover plate of cavity filter and cavity filter |
| TWM415429U (en) * | 2011-03-17 | 2011-11-01 | Hon Hai Prec Ind Co Ltd | Cavity filter |
| CN102361116A (en) * | 2011-10-11 | 2012-02-22 | 深圳市大富科技股份有限公司 | Cavity filter and cavity filter cover plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103700912A (en) | 2014-04-02 |
| WO2015101216A1 (en) | 2015-07-09 |
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Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518108, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |
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