CN203386875U - A cavity filter - Google Patents
A cavity filter Download PDFInfo
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- CN203386875U CN203386875U CN201320316794.3U CN201320316794U CN203386875U CN 203386875 U CN203386875 U CN 203386875U CN 201320316794 U CN201320316794 U CN 201320316794U CN 203386875 U CN203386875 U CN 203386875U
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- Prior art keywords
- cavity
- bar
- resonant column
- coupling part
- flies
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- 230000008878 coupling Effects 0.000 claims abstract description 52
- 238000010168 coupling process Methods 0.000 claims abstract description 52
- 238000005859 coupling reaction Methods 0.000 claims abstract description 52
- 238000004080 punching Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract 1
- 238000006880 cross-coupling reaction Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical group C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a cavity filter, and aims to solve a problem that the intensity of intersect coupling between existing cavity filter resonant cavities are not high. The cavity filter comprises a cavity and a cover plate. The cover plate caps the cavity in a sealing mode to form resonant cavities. A resonance column is arranged inside each resonant cavity. Each resonance column comprises a first end and a second end. The first ends of the resonance columns are fixedly connected with the cover plate. The second ends of the resonance columns are opposite to the bottom portion of the cavity. Otherwise, the first ends of the resonance columns are fixedly connected with the bottom portion of the cavity, and the second ends of the resonance columns are opposite to the cover plate. A fly post is fixed on a dividing wall between the resonant cavities. The fly post is provided with connecting portions connected with the dividing wall and coupling portions arranged at two sides of the connecting portion. The coupling portions of the fly rod are arranged between second end surfaces of the resonance columns and the cover plate or between second end surfaces of the resonance columns and the bottom portion of the cavity. The coupling portions of the fly post are opposite to the second end surfaces of the resonance columns and at least certain portions are overlapped.
Description
Technical field
The utility model relates to a kind of communications parts, more specifically to a kind of cavity body filter.
Background technology
Cavity body filter is widely used in the communications field as a kind of frequency selection device, and in the base station transmitted and received at the communication system settling signal, filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
In order to improve the performance of filter Out-of-band rejection, cavity body filter often need to add transmission zero in its transmission characteristic, and transmission zero is generally realized by cross-couplings physically, cross-couplings has various ways, and wherein a kind of is to realize with flying bar the capacitive cross coupling needed.As shown in Figure 1, this cavity body filter comprises cavity 110, cover plate 120, and the described cavity 110 of described cover plate 120 capping forms resonant cavity 130.Be provided with resonant column 140 in resonant cavity 130, resonant column 140 1 ends are fixedly connected with cavity 110 bottoms, and the other end is provided with an opening relative with cover plate 120.Be fixed with on dividing wall between resonant cavity 130 and fly bar 150, the described bar 150 that flies is between resonant column 140 open ends and cavity 110 bottoms.The described round plate 152 that flies on bar 150 to be provided with the connecting rod 151 be connected with described dividing wall and be positioned at connecting rod 151 both sides.Fly to form capacitive cross coupling between the sidewall of the round plate 152 of bar 150 and resonant column 140, the length by adjusting connecting rod 151 and the diameter of round plate 152 can be adjusted the cross-couplings amount.Due to fly bar be and the resonant column sidewall between be coupled, therefore the position that flies bar can only be between the open end and cavity bottom surface of resonant column, can not be between resonant column open end and cover plate the strength of electric field in this resonant cavity, therefore the coupling amount that can reach is limited.During special design of filter requires at some, need to realize very strong capacitive cross coupling, be difficult to meet design requirement by the coupled structure of this routine.
Summary of the invention
The purpose of this utility model is to provide a kind of cavity body filter that can increase substantially the cross-couplings amount between resonant cavity.
The technical solution of the utility model is: a kind of cavity body filter, comprise cavity, cover plate, the described cavity of described cover plate capping forms resonant cavity, be provided with resonant column in resonant cavity, described resonant column comprises first end and the second end, and the first end of described resonant column is fixedly connected with cover plate or cavity bottom; Be fixed with and fly bar on dividing wall between resonant cavity, the described bar that flies is provided with the connecting portion be connected with dividing wall and the coupling part that is positioned at the connecting portion both sides; The described coupling part that flies bar in the second end end face of resonant column and cover plate or and cavity bottom between, the described coupling part that flies bar is relative overlapping at least partly with the second end end face of resonant column.
Further, describedly fly bar in the form of sheets, described coupling part and the connecting portion that flies bar is coplanar.
Further, fly bar wherein the resonant column sidewall of a side or both sides be provided with and at least partly overlapping capacitance disk relative with the coupling part that flies bar, the second end end face of described capacitance disk and resonant column is coplanar.
Further, the capacitance disk of described resonant column and the moulding of resonant column integrated punching.
Further, described capacitance disk is circular, semi-annular shape, square ring-type or en ring-type.
Further, the described coupling part that flies bar is the semicircle plate-like.
Further, the second end of described resonant column is provided with opening, and described cover plate or cavity bottom are provided with adjusting screw(rod), and described adjusting screw(rod) stretches in the opening of resonant column; The described diameter serrated end that flies the bar coupling part is connected with the connecting portion that flies bar, and the described expanded in diameter end that flies the bar coupling part is relative with adjusting screw(rod).
Further, the described coupling part that flies bar in the form of a ring.
Further, the second end of described resonant column is provided with opening, and described cover plate or cavity bottom are provided with adjusting screw(rod), and described adjusting screw(rod) stretches in the opening of resonant column; The described coupling part of bar that flies is around described adjusting screw(rod).
Further, the described coupling part that flies bar is discoid.
Adopt the technical solution of the utility model, due to the coupling part that flies bar between the second end end face and cover plate or cavity bottom of resonant column, the described coupling part that flies bar is relative and overlapping at least partly with the second end end face of resonant column, make the zone of the coupling part that flies bar and resonant column coupling place this electric field strength maximum between the open end of resonant column and cover plate or cavity bottom, therefore can increase substantially the cross-couplings amount between resonant cavity.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1; The cavity body filter elevation cross-sectional view of prior art
Fig. 2; Fly bar coupling part cavity body filter elevation cross-sectional view in the form of annular discs
Fig. 3; Cavity body filter in Fig. 2 removes the vertical view after cover plate
Fig. 4; Fly the bar coupling part and be the cavity body filter elevation cross-sectional view of semicircle plate-like
Fig. 5; Cavity body filter in Fig. 4 removes the vertical view after cover plate
Fig. 6; Fly the bar coupling part and be circular cavity body filter elevation cross-sectional view
Fig. 7; Cavity body filter in Fig. 6 removes the vertical view after cover plate
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.
Embodiment mono-,
As shown in Fig. 2 to 7, the cavity body filter that the present embodiment provides comprises cavity 210, cover plate 220, the described cavity 210 of described cover plate 220 capping forms resonant cavity 230, be provided with resonant column 240 in resonant cavity 230, described resonant column 240 comprises first end and the second end, the first end of described resonant column 240 is fixedly connected with cover plate 220, the second end of described resonant column 240 is relative with cavity 210 bottoms, or the first end of described resonant column 240 is fixedly connected with cavity 210 bottoms, the second end of described resonant column 240 is relative with cover plate 220; Be fixed with and fly bar 260 on dividing wall 250 between resonant cavity 230, the described coupling part 262 that flies on bar 260 to be provided with the connecting portion 261 be connected with described dividing wall 250 and be positioned at connecting portion 261 both sides; The described coupling part 262 that flies bar the second end end face of resonant column 240 and cover plate 220 or and cavity 210 bottoms between, the described coupling part 262 that flies bar 260 is relative and overlapping at least partly with the second end end face of resonant column 240.
Preferably, describedly fly bar 260 in the form of sheets, described coupling part 262 and the connecting portion 261 that flies bar 260 is coplanar.
Preferably, fly bar 260 wherein resonant column 240 sidewalls of a side be provided with and at least partly overlapping capacitance disk 270 relative with the coupling part 262 that flies bar 260, described capacitance disk 270 is coplanar with the second end end face of resonant column 240.Owing to having increased capacitance disk 270, fly between bar 260 and resonant column 240 cross-linked area larger, fly also corresponding being increased of cross-couplings amount between bar 260 and resonant column 240.Resonant column 240 sidewalls that fly bar 260 opposite sides also can be provided with relative with the coupling part 262 that flies bar 260 and at least part of overlapping capacitance disk 270, can certainly not be provided with, and this will determine according to the operating mode of cavity body filter and the performance parameter that will reach.
Preferably, capacitance disk 270 can with resonant column 240 integrated punching moulding, certainly capacitance disk 270 can also be welded on the sidewall of resonant column 240, or cover installs on the end face of resonant column 240.
Preferably, the shape of capacitance disk 270 can be circular, semi-annular shape, square ring-type or en ring-type.The mode and the resonant column 240 that are comparatively speaking circular employing punching press preferably are one-body molded.
The coupling part 262 that flies bar 260 can have various shape, such as semicircle plate-like, discoid, and square plate shape, circular or square ring-type.An end relative with cover plate 220 or cavity 210 bottoms for resonant column 240 seals, be not provided with the situation that opening and cover plate 220 or cavity 210 bottoms are not provided with the adjusting screw(rod) 270 that stretches to resonant column 240 openings yet, coupling part 262 shapes that fly bar 260 can not be restricted, being above-mentioned shape can, but in the form of annular discs or the square plate shape is more excellent, as shown in Figures 2 and 3.
For resonant column 240, an end relative with cover plate 220 or cavity 210 bottoms is provided with the situation that opening and cover plate 220 or cavity 210 bottoms also are provided with the adjusting screw(rod) 270 that stretches to resonant column 240 openings, coupling part 262 shapes that fly bar 260 will be subject to certain restrictions, such as being the semicircle plate-like or circularly just more having superiority.
As shown in Figures 4 and 5, the coupling part 262 that flies bar 260 is the semicircle plate-like, and the described diameter serrated end that flies the coupling part 262 of bar 260 is connected with the connecting portion 261 that flies bar 260, and the expanded in diameter end of the described coupling part 262 that flies bar 260 is relative with adjusting screw(rod) 270.Obvious semicircle plate-like in this case easily replaces with the square plate shape.
As shown in Figures 6 and 7, the described coupling part 262 that flies bar 260 is circular, and the described coupling part 262 of bar 260 that flies is around described adjusting screw(rod) 270.The obvious circular easily side of replacing with ring-type in this case.
Adopt the technical scheme of the present embodiment, due to the coupling part 262 that flies bar 260 between the second end end face and cover plate 220 or cavity 210 bottoms of resonant column 240, the described coupling part 262 that flies bar 260 is relative and overlapping at least partly with the second end end face of resonant column 240, make the zone of the coupling part 262 that flies bar 260 and resonant column 240 couplings place this electric field strength maximum between the open end of resonant column 240 and cover plate 220 or cavity 210 bottoms, therefore can increase substantially the cross-couplings amount between resonant cavity 230.
Applied specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model simultaneously.
Claims (10)
1. a cavity body filter, comprise cavity, cover plate, the described cavity of described cover plate capping forms resonant cavity, be provided with resonant column in resonant cavity, described resonant column comprises first end and the second end, the first end of described resonant column is fixedly connected with cover plate, the second end and the cavity bottom of described resonant column are relative, or the first end of described resonant column is fixedly connected with cavity bottom, the second end and the cover plate of described resonant column are relative; Be fixed with and fly bar on dividing wall between resonant cavity, the described bar that flies is provided with the connecting portion be connected with dividing wall and the coupling part that is positioned at the connecting portion both sides; It is characterized in that,
The described coupling part that flies bar in the second end end face of resonant column and cover plate or and cavity bottom between, the described coupling part that flies bar is relative and overlapping at least partly with the second end end face of resonant column.
2. cavity body filter according to claim 1, is characterized in that, describedly flies bar in the form of sheets, and described coupling part and the connecting portion that flies bar is coplanar.
3. cavity body filter according to claim 2, is characterized in that, fly bar wherein the resonant column sidewall of a side or both sides be provided with and at least partly overlapping capacitance disk relative with the coupling part that flies bar, the second end end face of described capacitance disk and resonant column is coplanar.
4. cavity body filter according to claim 3, is characterized in that, described resonant column capacitance disk and the moulding of resonant column integrated punching.
5. cavity body filter according to claim 3, is characterized in that, that described capacitance disk is is circular, semi-annular shape, square ring-type or en ring-type.
6. according to the described cavity body filter of claim 2 to 5 any one, it is characterized in that, the described coupling part that flies bar is the semicircle plate-like.
7. cavity body filter according to claim 6, is characterized in that, the second end of described resonant column is provided with opening, and described cover plate or cavity bottom are provided with adjusting screw(rod), and described adjusting screw(rod) stretches in the opening of resonant column; The described diameter serrated end that flies the bar coupling part is connected with the connecting portion that flies bar, and the described expanded in diameter end that flies the bar coupling part is relative with adjusting screw(rod).
8. according to the described cavity body filter of claim 2 to 5 any one, it is characterized in that, the described coupling part that flies bar in the form of a ring.
9. cavity body filter according to claim 8, is characterized in that, the second end of described resonant column is provided with opening, and described cover plate or cavity bottom are provided with adjusting screw(rod), and described adjusting screw(rod) stretches in the opening of resonant column; The described coupling part of bar that flies is around described adjusting screw(rod).
10. according to the described cavity body filter of claim 2 to 5 any one, it is characterized in that, the described coupling part that flies bar is in the form of annular discs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320316794.3U CN203386875U (en) | 2013-06-04 | 2013-06-04 | A cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320316794.3U CN203386875U (en) | 2013-06-04 | 2013-06-04 | A cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203386875U true CN203386875U (en) | 2014-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320316794.3U Expired - Lifetime CN203386875U (en) | 2013-06-04 | 2013-06-04 | A cavity filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203386875U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017088348A1 (en) * | 2015-11-25 | 2017-06-01 | 江苏贝孚德通讯科技股份有限公司 | Duplexer with quasi-stripline structure |
| CN107615572A (en) * | 2014-12-30 | 2018-01-19 | 深圳市大富科技股份有限公司 | Cavity body filter and radio frequency remote equipment, signal receiving/transmission device and tower amplifier with the cavity body filter |
| CN109687079A (en) * | 2019-01-25 | 2019-04-26 | 江苏贝孚德通讯科技股份有限公司 | Communicate the capacitive coupling interaction structure of headend equipment device |
| WO2019091264A1 (en) * | 2017-11-10 | 2019-05-16 | 罗森伯格技术（昆山）有限公司 | Electromagnetic hybrid coupling structure |
| CN113809493A (en) * | 2020-06-17 | 2021-12-17 | 大富科技(安徽)股份有限公司 | Filter and communication device |
-
2013
- 2013-06-04 CN CN201320316794.3U patent/CN203386875U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107615572A (en) * | 2014-12-30 | 2018-01-19 | 深圳市大富科技股份有限公司 | Cavity body filter and radio frequency remote equipment, signal receiving/transmission device and tower amplifier with the cavity body filter |
| WO2017088348A1 (en) * | 2015-11-25 | 2017-06-01 | 江苏贝孚德通讯科技股份有限公司 | Duplexer with quasi-stripline structure |
| WO2019091264A1 (en) * | 2017-11-10 | 2019-05-16 | 罗森伯格技术（昆山）有限公司 | Electromagnetic hybrid coupling structure |
| CN109687079A (en) * | 2019-01-25 | 2019-04-26 | 江苏贝孚德通讯科技股份有限公司 | Communicate the capacitive coupling interaction structure of headend equipment device |
| CN113809493A (en) * | 2020-06-17 | 2021-12-17 | 大富科技(安徽)股份有限公司 | Filter and communication device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140108 |