CN203260699U - Cavity filter - Google Patents
Cavity filter Download PDFInfo
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- CN203260699U CN203260699U CN 201320191682 CN201320191682U CN203260699U CN 203260699 U CN203260699 U CN 203260699U CN 201320191682 CN201320191682 CN 201320191682 CN 201320191682 U CN201320191682 U CN 201320191682U CN 203260699 U CN203260699 U CN 203260699U
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- cavity
- conductive layer
- harmonic oscillator
- oscillator
- transmitter
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Abstract
A cavity filter of the utility model comprises a cavity body, an input/output port, harmonic oscillators and a connecting piece. The input/output port is arranged on the cavity body; the cavity internally comprises at least two resonant cavities; the resonant cavities are internally provided with the harmonic oscillators; the connecting piece used for signal transmitting is arranged between the harmonic oscillators and the input/output port, and each of the harmonic oscillators includes a medium body and a conductive layer arranged on the outer wall or the inner wall of the medium body. According to the cavity filter, group time delay can be adjusted by adjusting the height of a solder joint, and the filtering characteristic is effectively improved.
Description
Technical field
The utility model relates to filter field, particularly relates 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, field of radio frequency communication especially, and in the base station, filter is used for selecting signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
At present, the brace in some cavity body filters often adopts screw to be fixed on the other fixed station of harmonic oscillator, but such annexation and not exclusively reliable is loosening through causing easily after long-time the use, thereby affects filtering characteristic.
The utility model content
The utility model purpose be to solve in the present filter input or output unreliable with being connected of harmonic oscillator, a kind of cavity body filter is provided.
For achieving the above object, the technical solution of the utility model is: a kind of cavity body filter comprises cavity; Described cavity comprises at least two resonant cavitys, is provided with input/output port on the described cavity, is provided with transmitter on this input/output port;
Be provided with harmonic oscillator at least one described resonant cavity, be provided with the brace for signal transmission between described harmonic oscillator and the described transmitter;
Wherein, harmonic oscillator comprises the medium body and is arranged on the inner surface of described medium body and/or the conductive layer of outer surface.
Preferably, conductive layer is to be attached to one or more on the described medium body surface to have geometric conductive structure.
Preferably, the medium body is tubular medium body, and described conductive layer is tubular conduction oscillator, and described tubular medium body is sheathed on outside the described tubular conduction oscillator or is embedded in the described tubular conduction oscillator.
Preferably, tubular conduction oscillator comprises matrix and the surface metal-layer that forms on the surface of described matrix.
Preferably, conductive layer is set directly at inner surface and/or the outer surface of described medium body, and perhaps, described conductive layer is arranged on inner surface and/or the outer surface of described medium body by connecting medium.
Preferably, conductive layer is metal level.
Preferably, conductive layer comprises matrix and the surface metal-layer that forms on the surface of described matrix.
Preferably, brace is yi word pattern, L-type or Z-shaped.
Preferably, the two ends of brace are by being fixedly welded on the outer wall of described transmitter and harmonic oscillator.
Preferably, a transmitter part stretches in the described resonant cavity.
Preferably, harmonic oscillator also comprises part or the whole damp-proof layer that is covered in this harmonic oscillator outer wall or inwall.
The utlity model has following advantage and effect:
1, filter input end of the present utility model adopts the mode of welding, and brace is welded on the harmonic oscillator, connects more reliably, and index is better.
2, filter of the present utility model can just be regulated group delay by solder joint, Effective Raise filtering characteristic.
Description of drawings
Fig. 1 is the end view of the cavity body filter described in the utility model embodiment one;
Fig. 2 is the vertical view of cavity body filter among Fig. 1;
Fig. 3 a and 3b are the structural representations of harmonic oscillator in the cavity body filter described in the utility model embodiment one;
Fig. 4 a and 4b are the structural representations of harmonic oscillator in the cavity body filter described in the utility model embodiment two.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.It will be apparent to those skilled in the art that in the following detailed description above-mentioned purpose of the present utility model, feature and advantage will be apparent.
Embodiment one
A kind of cavity body filter is provided, such as Fig. 1, shown in 2, comprise: cavity 1, resonant cavity 2, harmonic oscillator 3, input/output port 4 and brace 5, wherein, described cavity 1 comprises at least 2 resonant cavitys 2, be provided with described input/output port 4 on the cavity 1, be provided with a transmitter 401 in this input/output port 4, comprise a resonant cavity 2 in the described cavity 1, be provided with harmonic oscillator 3 at least one resonant cavity 2, be provided with the brace 5 for signal transmission between described harmonic oscillator 3 and the described transmitter 401, wherein, described harmonic oscillator comprises: medium body 301 and the conductive layer 302 that is arranged on described medium body outer wall or the inwall, wherein
A free end of described brace 5 is connected on the transmitter 401 that is arranged in the described input/output port 4, and in Fig. 1, its another free end is connected on the outer wall of described harmonic oscillator 3, and preferred connected mode is welding; Certainly, also can adopt structure shown in Figure 2, one of them free end of described brace 5 is connected on the boss 6 of described harmonic oscillator 3 bottoms setting, and adopts screws to screw up fixing by fixing hole 501; At this foregoing is not construed as limiting.Described brace 5 is metal, profile can be yi word pattern, L-type or Z-shaped, the one end is connected on the outer wall of described harmonic oscillator 3, particularly, described brace 5 is welding with the connected mode of harmonic oscillator 3, the height of its solder joint can be regulated according to practical application, thereby can just regulate group delay by solder joint; The other end of described brace 5 is connected with described transmitter 401, is specially, and the partial sidewall of described brace 5 other ends is connected on the described transmitter 401, also adopts the mode of welding to connect.Certainly, described brace 5 connected modes and structure all do not consist of restriction of the present utility model.
Described input/output port 4 is arranged in the cavity body filter on the cavity 1, is provided with transmitter 401 in it, and these transmitter 401 parts stretch in the described resonant cavity 2, and described transmitter 401 can be metallic conductor, as: gold, silver, copper, iron etc.; It can be alloy; Also can be dielectric constant greater than 1 non-metal conductor, as: Teflon, pottery, aluminium oxide etc., described transmitter 401 adopts the purpose of above-mentioned materials to be not affect the filtering characteristic of filter, is not construed as limiting at this; The shape of described transmitter 401 can be square column type or shaft-like, and certainly, the shape of transmitter 401 is not as restriction of the present utility model, and the diameter of described transmitter 401 is adapted to the size of described input/output port 4, is not construed as limiting at this.
Described harmonic oscillator 3 is arranged in the described resonant cavity, and shown in Fig. 3 a and 3b, described harmonic oscillator 3 comprises medium body 301 and is arranged on the conductive layer 302 of described medium body 301 inner surfaces and/or outer surface.Described conductive layer 302 is set directly at inner surface and/or the outer surface of medium body, and perhaps, conductive layer 302 is arranged on inner surface and/or the outer surface of medium body 301 by connecting medium.Medium body 301 and conductive layer 302 can be tubular, and medium body 301 can be tubular medium oscillator, and conductive layer 302 can conduct electricity oscillator for tubular, and it is outer or be embedded in the described tubular conduction oscillator that tubular medium oscillator is sheathed on tubular conduction oscillator; Wherein, tubular conduction oscillator is made of metal, and perhaps makes by matrix with at the surface metal-layer that matrix forms, and this matrix is made by metal or alloy, and perhaps this matrix is made greater than 1 material by dielectric constant; The medium oscillator is made by dielectric material.Conductive layer 302 can also be metal level, is made by single metal or alloy.
Certainly, conductive layer 302 also can be other version, for example for Direct Electroplating or evaporation or be splashed to metal level on the medium body, also can have geometric conductive structure for being attached to one or more on the medium body surface, the random geometries such as the split ring resonator that this conductive structure can consist of for I-shaped metal wire, metal wire, rectangular metal sheet.
Described medium body 301 and conductive layer 302 are tubular, and preferably, described medium body 301 is made greater than 1 dielectric material by dielectric constant.The mode of welding in the present embodiment can be the welding manners such as arc welding, submerged-arc welding, electric resistance welding or Laser Welding.Welding manner does not consist of restriction of the present utility model.
Embodiment two
A kind of cavity body filter is provided, as shown in Figure 1, comprises: cavity 1, resonant cavity 2, harmonic oscillator 3, input/output port 4 and brace 5, wherein, except the structure of harmonic oscillator 3 changed, other structure of filter was all identical with above-mentioned enforcement one.
Be specially, be provided with described input/output port 4 on the described cavity 1, be provided with a transmitter 401 in this input/output port 4, comprise a resonant cavity 2 in the described cavity 1, be provided with harmonic oscillator 3 in the described resonant cavity 2, be provided with the brace 5 for signal transmission between described harmonic oscillator 3 and the described transmitter 401, wherein, described harmonic oscillator comprises: medium body 301 and the conductive layer 302 that is arranged on described medium body outer wall or the inwall.
A free end of described brace 5 is connected on the transmitter 401 that is arranged in the described input/output port 4, and in Fig. 1, its another free end is connected on the outer wall of described harmonic oscillator 3, and preferred connected mode is welding; Certainly, also can adopt structure shown in Figure 2, one of them free end of described brace 5 is connected on the boss 6 of described harmonic oscillator 3 bottoms setting, and adopts screws to screw up fixing by fixing hole 501; At this foregoing is not construed as limiting; Described brace 5 is metal or alloy, profile can be yi word pattern, L-type or Z-shaped, the one end is connected on the outer wall of described harmonic oscillator 3, particularly, described brace 5 is welding with the connected mode of harmonic oscillator 3, the height of its solder joint can be regulated according to practical application, thereby can just regulate group delay by solder joint; The other end of described brace 5 is connected with described transmitter 401, is specially, and the partial sidewall of described brace 5 other ends is connected on the described transmitter 401, also adopts the mode of welding to connect; Certainly, described brace 5 connected modes and structure all do not consist of restriction of the present utility model.
Described input/output port 4 is arranged in the cavity body filter on the cavity 1, be provided with transmitter 401 in it, these transmitter 401 parts stretch in the described resonant cavity 2, described transmitter 401 can be metallic conductor, such as gold, silver, copper, iron etc., also can be dielectric constant greater than 1 non-metal conductor, as: Teflon, pottery, aluminium oxide etc., described transmitter 401 adopts the purpose of above-mentioned material to be not affect the filtering characteristic of filter, is not construed as limiting at this; The shape of described transmitter 401 can be square column type or shaft-like, and certainly, the shape of transmitter 401 is not as restriction of the present utility model, and the diameter of described transmitter 401 is adapted to the size of described input/output port 4, is not construed as limiting at this.
Described harmonic oscillator 3 is arranged in the described resonant cavity 2, as shown in Figs. 4a and 4b, described harmonic oscillator 3 comprises medium body 301, is arranged on the conductive layer 302 of described medium body 301 inner surfaces and/or outer surface, and the damp-proof layer 303 that covers described harmonic oscillator outer wall or inwall, wherein, described medium body 301 and conductive layer 302 are tubular, preferably, described medium body 301 is made greater than 1 dielectric material by dielectric constant, and described conductive layer 302 is made by single metal or alloy.More preferably, conductive layer 302 comprises the oscillator matrix and covers the metal level of described oscillator matrix surface, wherein, described oscillator matrix is that nonmetallic materials are made, as: Teflon, pottery or aluminium oxide etc., perhaps make for the metal material different from described metal level, as: iron, copper, aluminium or steel etc.; At this foregoing is not done detailed restriction.
Described damp-proof layer 303 can be local or be integrally covered outer side wall surface and/or the interior side-wall surface of described harmonic oscillator 3, by reference to the accompanying drawings, damp-proof layer 303 among Fig. 4 a is arranged on the outer side wall surface of harmonic oscillator 3, in Fig. 4 b, damp-proof layer 303 is arranged on the interior side-wall surface of harmonic oscillator 3, further, the upper surface of harmonic oscillator 3 is provided with damp-proof layer too.As preferably, damp-proof layer 303 can be the above moisture-proof coating of one deck, is preferably two layers and three layers.Particularly, the moisture-proof coating described in above-described embodiment is low for having water absorption rate, and little any one moisture-proof coating of the prior art of dielectric loss, such as but not limited to Teflon coating, acrylic acid, organosilicon or polyurethane etc.Those skilled in the art, any mode that can be by prior art covers the surface of harmonic oscillator body with moisture-proof coating, such as the surface that moisture-proof coating is covered the harmonic oscillator body by infiltration, brushing or spraying coating process.
The mode of welding in the present embodiment can be the welding manners such as arc welding, submerged-arc welding, electric resistance welding or Laser Welding.Welding manner does not consist of restriction of the present utility model.
Foregoing description some preferred embodiments of the present utility model, but as previously mentioned, be to be understood that the utility model is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can in utility model contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not break away from spirit and scope of the present utility model, then all should be in the protection range of the utility model claims.
Claims (10)
1. a cavity body filter is characterized in that, comprises cavity; Described cavity comprises at least two resonant cavitys, is provided with input/output port on the described cavity, is provided with transmitter on this input/output port;
Be provided with harmonic oscillator at least one described resonant cavity, be provided with the brace for signal transmission between described harmonic oscillator and the described transmitter;
Described harmonic oscillator comprises the medium body and is arranged on the inner surface of described medium body and/or the conductive layer of outer surface.
2. cavity body filter according to claim 1 is characterized in that, described conductive layer is to be attached to one or more on the described medium body surface to have geometric conductive structure.
3. cavity body filter according to claim 1, it is characterized in that, described medium body is tubular medium body, and described conductive layer is tubular conduction oscillator, and described tubular medium body is sheathed on outside the described tubular conduction oscillator or is embedded in the described tubular conduction oscillator.
4. cavity body filter according to claim 3 is characterized in that, described tubular conduction oscillator comprises matrix and the surface metal-layer that forms on the surface of described matrix.
5. cavity body filter according to claim 3, it is characterized in that, described conductive layer is set directly at inner surface and/or the outer surface of described medium body, and perhaps, described conductive layer is arranged on inner surface and/or the outer surface of described medium body by connecting medium.
6. cavity body filter according to claim 1 is characterized in that, described conductive layer is metal level.
7. cavity body filter as claimed in claim 1 is characterized in that, described brace is yi word pattern, L-type or Z-shaped.
8. cavity body filter as claimed in claim 1 is characterized in that, the two ends of described brace are by being fixedly welded on the outer wall of described transmitter and harmonic oscillator.
9. cavity body filter as claimed in claim 8 is characterized in that, a described transmitter part stretches in the described resonant cavity.
10. such as arbitrary described cavity body filter among the claim 1-9, it is characterized in that described harmonic oscillator also comprises part or the whole damp-proof layer that is covered in this harmonic oscillator outer wall or inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320191682 CN203260699U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320191682 CN203260699U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203260699U true CN203260699U (en) | 2013-10-30 |
Family
ID=49473239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320191682 Expired - Fee Related CN203260699U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203260699U (en) |
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2013
- 2013-04-16 CN CN 201320191682 patent/CN203260699U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |