CN203260701U - Cavity filter - Google Patents
Cavity filter Download PDFInfo
- Publication number
- CN203260701U CN203260701U CN 201320191352 CN201320191352U CN203260701U CN 203260701 U CN203260701 U CN 203260701U CN 201320191352 CN201320191352 CN 201320191352 CN 201320191352 U CN201320191352 U CN 201320191352U CN 203260701 U CN203260701 U CN 203260701U
- Authority
- CN
- China
- Prior art keywords
- cavity
- resonant
- coupling
- medium
- resonant rod
- 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
Images
Abstract
The utility model discloses a cavity filter comprising a cavity body in which a plurality of resonant cavities and resonant bars are arranged, wherein the resonant bars are positioned in the resonant cavities, a coupling window communicated to the inner bottom surface of the cavity body is arranged between the two adjacent resonant cavities, a coupling boss is arranged in a position, corresponding to the coupling window, on the inner bottom surface of the cavity body, the two resonant cavities at the two sides of the coupling window are internally provided with the resonant bars respectively, and each of the resonant bars includes a medium body and a conductive layer arranged on the surface of the medium body. According to the cavity filter, the coupling strength between the two adjacent resonant cavities is changed by changing the height of the coupling boss between the adjacent resonant bars of the cavity, thereby achieving the demand of coupling strength controlling and effectively improving the electrical performance of the filter. The cavity filter has the advantages of stable electrical performance and the like.
Description
Technical field
The utility model relates to the electronic devices and components structure in the communications field, specifically, relates to a kind of cavity body filter.
Background technology
At present, in the filter industry, the Coupling Design of filtering window normally adopts between the chamber of filter and the chamber by the window direct-coupling, without coupling block or coupling piece etc., during the debugging filter, control the power of coupling by the size that changes window, and after filter deeply develops or after facing the upgrading of system, need to satisfy miniaturization, with the demand of wide or ultra broadband, but existing coupling window Energy Coupling degree wretched insufficiency, can't realize the indices of filter electric property, thereby affect the development of filter.
The utility model content
The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of cavity body filter to be provided, to solve the problem of Energy Coupling degree deficiency between the resonant cavity.
For achieving the above object, a kind of cavity body filter that the utility model is designed, comprise cavity, be provided with a plurality of resonant cavitys and resonant rod in the described cavity, described resonant rod is positioned at described resonant cavity, be provided with the coupling window that passes to described cavity inner bottom surface between two adjacent described resonant cavitys, be provided with the coupling boss in the position of described coupling window on the inner bottom surface of described cavity; Be respectively equipped with described resonant rod in two resonant cavitys of described coupling window both sides, one of them described resonant rod comprises the medium body and is arranged on this lip-deep conductive layer of described medium.
Preferably, described conductive layer is to be attached to one or more on the described medium body surface to have geometric conductive structure.
Preferably, described medium body is the medium cylinder, and described conductive layer is the metal cylinder that is set in outside the described medium cylinder or is positioned at described medium cylinder, and described metal cylinder is electrically connected with cavity.
Preferably, described coupling boss is strip, and two ends extend to respectively in two adjacent described resonant cavitys.
Preferably, described coupling boss is arranged on the middle position between described two adjacent resonant rods, and it highly is lower than described resonant rod, and its width is less than the diameter of described resonant rod.
Preferably, be respectively equipped with spacing between the inwall of described coupling boss, described cavity and the resonant rod.
Preferably, described coupling window, described coupling boss and described cavity are one-body molded.
Preferably, described medium body is made greater than 1 dielectric material by dielectric constant.
Preferably, described medium cylinder is made greater than 1 dielectric material by dielectric constant.
Preferably, the metal cylinder of described metal cylinder for being made by single metal or alloy.
Preferably, described metal cylinder comprises matrix and the metal level that covers described matrix surface.
The utility model is by arranging the coupling boss between the adjacent resonant rod of cavity, the height that changes described coupling boss realizes changing the stiffness of coupling between resonant cavity and the resonant cavity, thereby reaches the strong and weak needs of control coupling; Simultaneously, resonant rod structure of the present utility model is so that resonant cavity has low-down resonance frequency, thereby much smaller with traditional resonant cavity phase specific volume of identical resonance frequency.
The whole Effective Raise of the utility model the electric property of filter, have the advantages such as electric property is stable.
Description of drawings
Fig. 1 is the vertical view of cavity body filter described in the utility model;
Fig. 2 is that the A-A of cavity body filter described in the utility model is to cutaway view;
Among the figure, Reference numeral is: 1-cavity, 2-cover plate, 3-resonant cavity, 4-resonant rod, 5-coupling window, 6-coupling boss, 7-metal cylinder, 8-medium cylinder.
Embodiment
Censure specific components as in the middle of specification and claim, having used some vocabulary.Those skilled in the art should understand, and hardware manufacturer may be called same assembly with different nouns.This specification and claims are not used as distinguishing the mode of assembly with the difference of title, but the criterion that is used as distinguishing with the difference of assembly on function.Be an open language such as " comprising " mentioned in the middle of specification and the claim in the whole text, so should be construed to " including but not limited to ".The specification subsequent descriptions is for implementing preferred embodiments of the present utility model, and right described description is to illustrate that rule of the present utility model is purpose, is not to limit scope of the present utility model.Protection range of the present utility model is as the criterion when looking the claims person of defining.
As depicted in figs. 1 and 2, a kind of cavity body filter described in the utility model comprises cavity 1 and the cover plate 2 that is sealed on the cavity 1, and described cavity 1 and cover plate 2 can be enclosed the space of a sealing.Be provided with a plurality of resonant cavitys 3 and resonant rod 4 in the described cavity 1, described resonant rod 4 is positioned at described resonant cavity 3, wherein,
Be provided with coupling window 5 between two adjacent described resonant cavitys 3, described coupling window 5 is to be separated and formed by the convex tendon that two adjacent described resonant cavitys 3 arrange in opposite directions by described cavity 2 inwalls, and also namely this coupling window 5 leads to cavity 2 inner bottom surfaces from cavity 2 inner top surfaces.
The bottom of described cavity 1 also is provided with coupling boss 6 in the position at coupling window 5 places, preferably, described coupling boss 6 and described cavity 1 are one-body molded.Certainly, described coupling boss 6 also can be fixed with one by welding or hot pressing or other known interconnection techniques and described cavity 1.
In the present embodiment, described coupling boss 6 is arranged on middle position between the described coupling window 5, and it highly is higher than described resonant rod 4, and its width is less than the diameter of described resonant rod 4.Certainly, described coupling boss 6 can not arrange at same straight line with described two adjacent described resonant rods 4, can not arrange between two parties yet, described coupling boss 6 can be concordant or not with described resonant rod 4 yet, its height can equal, be below or above the height of described resonant rod 4, and its width also can be equal to, or greater than the diameter of described resonant rod 4.In addition, shape for coupling boss 6, scrutablely as those skilled in the art be, the shape of boss can but be not limited to cuboid, prismatoid and cylinder, its surface can but be not limited to adopt smooth and curved design, the edge of boss can be right angle or round-corner transition.At this foregoing is not made restriction.
Described resonant rod 4 is positioned at two resonant cavitys of coupling window 5 both sides, and resonant rod 4 can be the metal resonant rod, also can be the ceramic resonance bar.Resonant rod 4 of the present utility model comprises medium body and the conductive layer that is arranged on the described medium body surface, for example for being plated in the silver layer of medium body inner surface or outer surface.In the present embodiment, the medium body is medium cylinder 8, and described conductive layer is to be set in the outer metal cylinder 7 of described medium cylinder, and described metal cylinder is electrically connected with cavity.Certainly, also can be metal cylinder 7 interior, medium cylinder 8 is outside.Resonant rod 4 is arranged in the described resonant cavity 3 between two parties.Such as, described resonant rod 4 can be fixed by welding, bottom bonding or other modes and resonant cavity 3.
In the present embodiment, described resonant cavity 3 is rectangle side's shape, and four ribs are rounding, certainly, this resonant cavity 3 also can be the shape that existing arbitrary resonant cavity has, and such as cylindrical, square column type, trapezoidal shape or other rule or irregular shape, does not make concrete restriction at this.
Described metal cylinder 7 is arranged on the outside of described medium cylinder 8, and the inwall of described metal cylinder 7 can directly link to each other with the outer wall of described medium cylinder 8, also can link to each other by connection media such as other electric conducting materials.Described metal cylinder 7, metal cylinder can be made by single metal or alloy, such as copper, aluminium, invar etc.Wherein, the structure of metal cylinder can also preferably include matrix and cover the metal level of described matrix surface, thus the performance of Optimal Filter more; Particularly, described matrix is that nonmetallic materials are made, as: Teflon, pottery, aluminium oxide etc., perhaps make for the metal material different from described metal level, as: iron, copper, aluminium, steel etc., at this foregoing is not made detailed restriction.
Certainly, conductive layer 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.
The described medium cylinder 8 general dielectric constants of selecting are made greater than 1 dielectric material.The material that dielectric constant is higher, loss angle tangent is less more is conducive to electromagnetic resonance and reduces resonance frequency, preferably ceramic material in the prior art, such as aluminium oxide, zirconia etc. also can be selected microwave-medium ceramics, as: one or more in barium titanate, calcium titanate and the Teflon.
In addition, select at the material of described cavity 1 and described cover plate 2, we also often select in copper, iron, the aluminium one or more, certainly, in order to increase the conductivity of cavity 1, can adhere to conductive layer in the inner wall surface of cavity 1, described conductive layer is by being comprised of the material of conduction, preferable alloy, for example: silver, copper or gold, perhaps for containing one or more the alloy in silver, copper or the gold, certainly, also can be other metal materials or other metal alloy electric conducting materials, also can be non-metallic conduction material, do not make restriction at this.On described cover plate 2, also can electroplate some such as metallics or other alloying substances of silver, copper, can increase the wear-resisting and corrosion resistance of cover plate 2.
The utility model is by changing the stiffness of coupling between the two adjacent resonant cavitys 3 at the height that coupling boss 6 and change coupling boss 6 are set between the two adjacent resonant cavitys 3, thereby reach the strong and weak needs of control coupling, certainly, shape that also can be by changing described coupling boss 6, size, length and width degree etc. and then reach the stiffness of coupling that changes between the two adjacent resonant cavitys 3.
In addition, the utility model also relates to the resonant rod 4 of coupling boss 6 both sides and resonant cavity 3, filtering device and the electromagnetic wave device with this resonant rod 4, this resonant rod 4 is so that resonant cavity 3 has low-down resonance frequency, thereby much smaller with traditional resonant cavity phase specific volume of identical resonance frequency, the volume and weight that can effectively reduce the filtering device that is consisted of by resonant cavity and have the electromagnetic wave device of this filtering device, and make the electric property of filter stable, also be easy to make.
Above-mentioned explanation illustrates and has described 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 (8)
1. cavity body filter, comprise cavity, be provided with a plurality of resonant cavitys and resonant rod in the described cavity, described resonant rod is positioned at described resonant cavity, it is characterized in that, be provided with the coupling window that passes to described cavity inner bottom surface between two adjacent described resonant cavitys, be provided with the coupling boss in the position of described coupling window on the inner bottom surface of described cavity; Be respectively equipped with described resonant rod in two resonant cavitys of described coupling window both sides, one of them described resonant rod comprises the medium body and is arranged on this lip-deep conductive layer of described medium.
2. cavity body filter as claimed in 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 as claimed in claim 1 is characterized in that, described medium body is the medium cylinder, and described conductive layer is the metal cylinder that is set in outside the described medium cylinder or is positioned at described medium cylinder, and described metal cylinder is electrically connected with cavity.
4. cavity body filter as claimed in claim 1 is characterized in that, described coupling boss is strip, and two ends extend to respectively in two adjacent described resonant cavitys.
5. cavity body filter as claimed in claim 3 is characterized in that, described coupling boss is arranged on the middle position between described two adjacent resonant rods, and it highly is lower than described resonant rod, and its width is less than the diameter of described resonant rod.
6. cavity body filter as claimed in claim 4 is characterized in that, is respectively equipped with spacing between the inwall of described coupling boss, described cavity and the resonant rod.
7. cavity body filter as claimed in claim 5 is characterized in that, described coupling window, described coupling boss and described cavity are one-body molded.
8. cavity body filter according to claim 3 is characterized in that, described metal cylinder comprises matrix and covers the metal level of described matrix surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320191352 CN203260701U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320191352 CN203260701U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203260701U true CN203260701U (en) | 2013-10-30 |
Family
ID=49473241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320191352 Expired - Fee Related CN203260701U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203260701U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836000A (en) * | 2014-02-08 | 2015-08-12 | 南京福客通信设备有限公司 | Dual mode medium filter |
-
2013
- 2013-04-16 CN CN 201320191352 patent/CN203260701U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836000A (en) * | 2014-02-08 | 2015-08-12 | 南京福客通信设备有限公司 | Dual mode medium filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107046157B (en) | Suspended stripline bandstop filter and its communication cavity device | |
| US9991577B2 (en) | Cavity filter using cross-coupling | |
| CN104064840B (en) | Miniaturization band resistance type frequency-selective surfaces | |
| CN203218423U (en) | Cavity filter | |
| CN104885293A (en) | Resonator, filter, duplexer, multiplexer and communication device | |
| CN205944361U (en) | TM mould bi -polar short circuit wave filter | |
| CN203260702U (en) | Cavity filter | |
| CN201063357Y (en) | Input/output regulation type coupling device for filter | |
| CN203260701U (en) | Cavity filter | |
| CN106159395A (en) | Cavity body filter, duplexer and radio frequency remote equipment | |
| CN104733828B (en) | TM mould dielectric resonators | |
| CN203260698U (en) | Cavity filter | |
| CN203260704U (en) | Cavity filter | |
| CN203260703U (en) | Cavity filter | |
| CN202434684U (en) | Resonant cavity | |
| CN203218432U (en) | Resonant cavity, filter device and electromagnetic wave device | |
| CN103151595A (en) | Resonator with liner resonance rod | |
| CN202217777U (en) | Resonant cavity | |
| CN103165969B (en) | Harmonic oscillator, resonant cavity, wave filter component and electromagnetic wave equipment | |
| CN203503762U (en) | Cavity filter | |
| CN107681245B (en) | Single-negative metamaterial heterojunction loaded with comb-shaped inductor and open resonant ring | |
| CN103840238A (en) | Resonant cavity, filter and electromagnetic wave equipment | |
| CN202094256U (en) | Small-size high power microwave filter | |
| CN203119076U (en) | Resonant cavity, filtering device and electromagnetic wave equipment | |
| CN103107406B (en) | Harmonic oscillator, resonant cavity, wave filter and electromagnetic wave device |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 |