CN203260700U - Cavity filter - Google Patents
Cavity filter Download PDFInfo
- Publication number
- CN203260700U CN203260700U CN 201320191330 CN201320191330U CN203260700U CN 203260700 U CN203260700 U CN 203260700U CN 201320191330 CN201320191330 CN 201320191330 CN 201320191330 U CN201320191330 U CN 201320191330U CN 203260700 U CN203260700 U CN 203260700U
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- Prior art keywords
- cavity
- bar
- cavity body
- body filter
- coupling
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Abstract
The utility model discloses a cavity filter which comprises a cavity body, resonant cavities, an isolation wall, harmonic oscillators and a flying rod, wherein the cavity body comprises at least two resonant cavities, at least one of the resonant cavities is internally provided with a harmonic oscillator, the isolation wall is arranged between the two adjacent resonant cavities, a coupling window is arranged on the isolation wall, two ends of the flying rod respectively extend in the resonant cavities at two sides of the isolation wall through the coupling window, the flying rod can move up and down in the cavity body, and each harmonic oscillator includes a medium body and a conductive layer arranged on the inner surface and/or outer surface of the medium body. A negative coupling coefficient between the harmonic oscillators of the filter is achieved, a transmission zero is generated after cross coupling, and the cross coupling strength can be adjusted.
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.
The effect of cavity body filter is with useful signal undamped passing through as far as possible, and unwanted signal is decayed as far as possible, and it is radio-frequency devices indispensable in the communication system; Generally be located at signal transmitting and receiving device or the circuit part of communication equipment, to realize the selection effect of communication equipment signal.The kind of filter is very many, but the Mathematical Modeling on its equivalent electric circuit and basis thereof is consistent.Its design needs to consider a lot of factors, following factor is arranged usually: volume and weight; Quality factor; Bandwidth; Tuning range; Coupled structure and power capacity; Costco Wholesale is made difficulty etc.Wherein, cross coupling structure has directly determined the filtering characteristic of filter.
But, the fixed cross coupling structure of many employings in the present cavity body filter, thereby cause the power capacity of filter and filtering characteristic not to be adjusted accordingly according to practical application, and, there is not negative coupling coefficient between the harmonic oscillator in the cavity body filter, after cross-couplings, without transmission zero.
The utility model content
It is adjustable that the utility model purpose is to realize to fly in the filter bar position, and cross-couplings intensity is had adjustability, and between its harmonic oscillator negative coupling coefficient is arranged, and after the cross-couplings, produces transmission zero, and 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, comprise cavity, resonant cavity, dividing wall, harmonic oscillator and fly bar, described cavity comprises at least two resonant cavitys, be provided with harmonic oscillator at least one described resonant cavity, be provided with the isolation part between the adjacent described resonant cavity, be provided with coupling window on the described isolation part, the described two ends that fly bar are stretched into respectively by described coupling window in the resonant cavity of both sides, described isolation part, and the described bar that flies can move up and down in described cavity;
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, described 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, the isolation part is plane or curved face type.
Preferably, fly bar and comprise a coupling bar, perhaps the described bar that flies comprises a coupling bar and the coupling disc that is arranged on described coupling bar body of rod two ends.
Preferably, coupling disc is made by metal material.
Preferably, coupling disc is that the metal wire coiling forms.
Preferably, cavity body filter also comprises cover plate, and this cover plate is provided with adjusting device, and the described bar that flies is moving up and down in described cavity under the control of adjusting device; Be provided with the I shape sliding part in the described coupling window, described sliding part can slide along the edge of described coupling window; The described bar that flies is fixed on the described sliding part.
Preferably, adjusting device is adjustment screw, and it passes the screwed hole and the described sliding part that arrange on the described cover plate and is flexibly connected, and described adjusting device can be rotated arbitrarily in the fixing hole of described sliding part.
Preferably, flying the bar mid point is symmetricly set in the described coupling window.
Compared with prior art, the utlity model has following advantage and effect:
1, the utility model adopts the adjustable bar that flies, can regulate cross-couplings intensity according to the position that the practical application adjustment flies bar, produce different filtering characteristics, effectively increased the practicality of cavity body filter, and negative coupling coefficient arranged between its harmonic oscillator, after the cross-couplings, produce transmission zero, thereby effectively promoted the filtering characteristic of cavity body filter.
2, structure of the present utility model realizes easily, and it is low effectively to save cost, enhances productivity.
Description of drawings
Fig. 1 is the described cavity body filter structural representation of the utility model embodiment;
The structural representation that Fig. 2 is Figure 1A-A in the cavity;
Fig. 3 a and 3b are the structural representations of harmonic oscillator in the described cavity body filter of the utility model embodiment.
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.
As shown in Figure 1, 2, the utility model provides a kind of cavity body filter, comprising: cavity 1, resonant cavity 2, isolation part 3, harmonic oscillator 4, fly bar 5, sliding part 6 and cover plate.Wherein, comprise at least 2 resonant cavitys 2 in the cavity 1, in this enforcement, consult Fig. 1, comprise two resonant cavitys 2 in the described cavity 1, be not construed as limiting at this, at least one resonant cavity 2 is provided with harmonic oscillator 4, is provided with isolation part 3 between the adjacent resonators 2, is provided with coupling window on the isolation part 3, be provided with I shape sliding part 6 on this coupling window, the body of this sliding part 6 is provided with through hole, describedly flies the through hole that bar 5 passes described sliding part 6, and two ends are stretched into respectively in the resonant cavity 2 of 3 both sides, described isolation part, described cover plate is provided with adjusting device (cover plate and adjusting device are not shown in the figures), and described sliding part 6 moves up and down with described adjusting device.Those skilled in the art can adopt any adjusting device in the prior art, and its purpose can drive exactly sliding part and do upper-lower position move in cavity.
Described isolation part 3 is plane or curved face type, is arranged between the adjacent described resonant cavity 2, and preferably, described isolation part 3 is structure as a whole with described cavity 1; The upper surface of the wall body of described isolation part 3 offers coupling window, described coupling window is specially the groove on the isolation part 3, the position that this groove is offered, size and the degree of depth can arrange according to the filtering characteristic of described filter, preferably, as shown in Figure 1, described coupling window is arranged at the centre position of 3 upper surfaces, described isolation part, and described isolation part 3 is divided into two parts, at this foregoing is not construed as limiting.
Described harmonic oscillator 4 is symmetricly set in the resonant cavity 2 of 3 both sides, described isolation part, and shown in Fig. 3 a and 3b, described harmonic oscillator 4 comprises medium body 401 and is arranged on the conductive layer 402 of described medium body 401 inner surfaces and/or outer surface.Described conductive layer 402 is set directly at inner surface and/or the outer surface of medium body, and perhaps, conductive layer 402 is arranged on inner surface and/or the outer surface of medium body 401 by connecting medium.Medium body 401 and conductive layer 402 can be tubular, and medium body 401 can be tubular medium oscillator, and conductive layer 402 is tubular conduction oscillator, and tubular medium oscillator is sheathed on outside the tubular conduction oscillator or is embedded in the described tubular conduction oscillator.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; Preferably, the medium oscillator is made by dielectric material; Conductive layer 402 can also be metal level, is made by single metal or alloy.
Certainly, conductive layer 402 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 bar 5 that flies, as shown in Figure 2, the coupling disc 502 that comprises a coupling bar 501 and body of rod two ends, described coupling bar 501 is symmetrical arranged with the mid point of described coupling window, the coupling disc 502 at two ends stretches into respectively in the resonant cavity 2 of 3 both sides, described isolation part, to realize the signal transmission in two resonant cavitys 2, the area of described coupling disc 502 can be more than or equal to 501 liang of end cross-sectional areas of described coupling bar, preferably, the coupling disc that described coupling disc 502 processes for metal specifically can be the coil coupling dish that is formed by the metal wire coiling; Certainly, the described bar 5 that flies can also be the cross coupling structure spare of other forms and structure, does not all consist of restriction of the present utility model.Certainly, as possibility, flying bar 5 can be the coupling bar that two ends do not have coupling disc.
The size of the through-hole wall diameter of described sliding part 6 is adapted to the described body of rod diameter that flies bar 5, is sheathed on the described body of rod midpoint that flies bar 5, and is stuck in the coupling window of described isolation part 3; At this foregoing is not limited.
As what it will be appreciated by those skilled in the art that, above-mentioned adjusting device can following scheme: the position of corresponding described sliding part 6 is provided with the screwed hole (not shown) on the described cover plate, in this screwed hole adjusting device is installed, it is the adjustment screw (not shown), preferably, this adjustment screw adopts metal material to make, as: steel, iron or copper, certainly, also can adopt the higher metal material of other property led, unaffected for the filtering characteristic that ensures described filter, described adjustment screw also can adopt any dielectric constant to make greater than 1 material; During connection, described adjustment screw end in described resonant cavity 2 is installed on described sliding part 6 bodies, and be movably connected in the fixing hole of sliding part, so that adjustment screw is when rotating, described sliding part 6 can not drive described sliding part 6 and fly bar 5 and rotate, thereby, when moving in the screwed hole of described adjustment screw at cover plate, can drive described sliding part 6 and fly bar 5 and in described coupling window, move up and down, so that it is in diverse location, at this above-mentioned syndeton not limited.The benefit of bringing of this scheme is: need not with described cover plate open change different length fly bar 5, only need to drive the described adjustment that bar 5 is done diverse location that flies by screwing adjustment screw, to reach the stiffness of coupling of regulating filter and the purpose of coupling coefficient, it is simple to operate, easy to use, applicability is good.
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 (13)
1. cavity body filter, it is characterized in that, comprise cavity, resonant cavity, dividing wall, harmonic oscillator and fly bar, described cavity comprises at least two resonant cavitys, be provided with harmonic oscillator at least one described resonant cavity, be provided with the isolation part between the adjacent described resonant cavity, be provided with coupling window on the described isolation part, the described two ends that fly bar are stretched into respectively by described coupling window in the resonant cavity of both sides, described isolation part, and the described bar that flies can move up and down in described cavity;
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 oscillator, and described conductive layer is tubular conduction oscillator, and described tubular medium oscillator 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 is characterized in that, described conductive layer is set directly at inner surface and/or the outer surface of described medium body; 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 according to claim 1 is characterized in that, described isolation part is plane or curved face type.
8. cavity body filter as claimed in claim 1 is characterized in that, the described bar that flies comprises a coupling bar, and perhaps the described bar that flies comprises a coupling bar and the coupling disc that is arranged on described coupling bar body of rod two ends.
9. cavity body filter as claimed in claim 8 is characterized in that, described coupling disc is made by metal material.
10. cavity body filter as claimed in claim 9 is characterized in that, described coupling disc is that the metal wire coiling forms.
11. such as the arbitrary described cavity body filter of claim 1-10, it is characterized in that described cavity body filter also comprises cover plate, described cover plate is provided with adjusting device, the described bar that flies is moving up and down in described cavity under the control of adjusting device;
Be provided with the I shape sliding part in the described coupling window, described sliding part can slide along the edge of described coupling window; The described bar that flies is fixed on the described sliding part.
12. cavity body filter as claimed in claim 11, it is characterized in that, described adjusting device is adjustment screw, and it passes the screwed hole and the described sliding part that arrange on the described cover plate and is flexibly connected, and described adjusting device can be rotated arbitrarily in the fixing hole of described sliding part.
13. cavity body filter as claimed in claim 12 is characterized in that, the described bar mid point that flies is symmetricly set in the described coupling window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320191330 CN203260700U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320191330 CN203260700U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203260700U true CN203260700U (en) | 2013-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320191330 Expired - Fee Related CN203260700U (en) | 2013-04-16 | 2013-04-16 | Cavity filter |
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| CN (1) | CN203260700U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218281A (en) * | 2014-08-27 | 2014-12-17 | 西安空间无线电技术研究所 | TE01 mode dielectric filter |
| CN106207338A (en) * | 2016-08-31 | 2016-12-07 | 安徽赛福电子有限公司 | A kind of adjustable cavity body filter |
| CN106207339A (en) * | 2016-08-31 | 2016-12-07 | 安徽赛福电子有限公司 | A kind of coupling filter |
| CN107112618A (en) * | 2014-12-31 | 2017-08-29 | 深圳市大富科技股份有限公司 | Coupled structure, cavity body filter and the duplexer of cavity body filter |
| CN111033886A (en) * | 2018-07-20 | 2020-04-17 | 深圳市大富科技股份有限公司 | Cross coupling structure and cavity filter |
| CN111384499A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Filter, duplexer and communication equipment |
| CN113594651A (en) * | 2021-07-06 | 2021-11-02 | 大富科技(安徽)股份有限公司 | Capacitive coupling structure of cavity filter and communication equipment |
| CN113675560A (en) * | 2020-05-14 | 2021-11-19 | 大富科技(安徽)股份有限公司 | Filter and communication equipment |
-
2013
- 2013-04-16 CN CN 201320191330 patent/CN203260700U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218281A (en) * | 2014-08-27 | 2014-12-17 | 西安空间无线电技术研究所 | TE01 mode dielectric filter |
| CN107112618A (en) * | 2014-12-31 | 2017-08-29 | 深圳市大富科技股份有限公司 | Coupled structure, cavity body filter and the duplexer of cavity body filter |
| CN106207338A (en) * | 2016-08-31 | 2016-12-07 | 安徽赛福电子有限公司 | A kind of adjustable cavity body filter |
| CN106207339A (en) * | 2016-08-31 | 2016-12-07 | 安徽赛福电子有限公司 | A kind of coupling filter |
| CN111033886A (en) * | 2018-07-20 | 2020-04-17 | 深圳市大富科技股份有限公司 | Cross coupling structure and cavity filter |
| CN111384499A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Filter, duplexer and communication equipment |
| CN113675560A (en) * | 2020-05-14 | 2021-11-19 | 大富科技(安徽)股份有限公司 | Filter and communication equipment |
| CN113594651A (en) * | 2021-07-06 | 2021-11-02 | 大富科技(安徽)股份有限公司 | Capacitive coupling structure of cavity filter and communication equipment |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 |