CN107359394A - Adjustable electromagnetic hybrid coupled wave filter - Google Patents
Adjustable electromagnetic hybrid coupled wave filter Download PDFInfo
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- CN107359394A CN107359394A CN201710699461.6A CN201710699461A CN107359394A CN 107359394 A CN107359394 A CN 107359394A CN 201710699461 A CN201710699461 A CN 201710699461A CN 107359394 A CN107359394 A CN 107359394A
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- capacitive coupling
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- cavity
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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
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Abstract
Present invention is disclosed a kind of adjustable electromagnetic hybrid coupled wave filter, including cavity and resonant column, resonant column is fixed in cavity and resonant-frequency adjustable caused by it；Capacitive coupling structure and inductive coupled structure are provided between two adjacent resonant columns, and the inductive coupled amount size of the capacitive coupling amount of capacitive coupling structure and inductive coupled structure is adjustable；Two kinds of coupled structures exist simultaneously, collectively form electromagnetism hybrid coupled structure, and collocation structure connects two non-conterminous resonant columns, and it produces capacitive and/or inductive coupled between non-conterminous two resonant columns.The present invention can be such that it so as to improve near-end Out-of-band rejection, while improves closer to passband with interior echo and Insertion Loss index in the position of interior regulation passband near-end transmission zero in a big way.
Description
Technical field
The present invention relates to a kind of electromagnetism hybrid coupled wave filter, more particularly, to it is a kind of correct transmission zero location can
Adjust electromagnetism hybrid coupled wave filter.
Background technology
Electromagnetism hybrid coupled technology refers to be electrically coupled and magnetic using simultaneous on coupling path between adjacent resonators
Coupling produces transmission zero so as to improve the method for wave filter Out-of-band rejection.In theory, N ranks wave filter can at most have N-1 groups
Electromagnetism hybrid coupled, N-1 transmission zero is produced, far more than the N using cross-coupling technique or source-load coupling technique design
Rank wave filter.
The resonant frequency that the frequency of its transmission zero of existing electromagnetism mixed structure is adjacent thereto is related, works as wave filter
When passband is wider, it is difficult to transmission zero is concentrated on near pass-band, i.e., higher Out-of-band rejection can not be realized in passband near-end.
It is another to have international application no to disclose a kind of coaxial cavity filtering in PCT/EP2015/065916A1 patent document
Device, by setting inductance cross-couplings between non-adjacent conductor, realizing need not provide directly between non-adjacent conductor for it
In the case of connecing the bypass connector of Ohm connection, there is provided one or more transmission nodes.But above-mentioned patented technology still has
Following defects：1st, volume is big；2nd, capacitive coupling and resonant frequency all with resonant column height correlation, it is difficult to individually tuning；3rd, part
Size is more sensitive, higher to requirement on machining accuracy.
It is another to have number of patent application to disclose a kind of controllable electromagnetic hybrid coupled coaxial cavity filter in CN200810027449.1
Ripple device, elliptic function filter characteristic is realized with the coupling coaxial cavity filter only with main coupling path, but it has following lack
Fall into：1st, resonant column needs capacitive load to reduce frequency, and volume is larger；2nd, the intermodulation index of system is degrading using dielectric substrate；
3rd, coupling assembly is arranged on resonance top end, is not easy to adjust.
Therefore it is involved in above-mentioned background technology to solve, it is necessary to study a kind of new electromagnetism hybrid coupled wave filter
Technological deficiency.
The content of the invention
The defects of it is an object of the invention to overcome prior art, there is provided a kind of adjustable electromagnetic hybrid coupled wave filter, lead to
Increase compensating for coupling structure is crossed, to improve electromagnetism hybrid coupled performance of filter.
To achieve the above object, the present invention proposes following technical scheme：A kind of adjustable electromagnetic hybrid coupled wave filter, including
Cavity, at least three resonant columns, at least a capacitive coupling structure, at least one inductive coupled structure and collocation structure, the resonance
Post is fixed in cavity and resonant-frequency adjustable caused by it；Be provided between two adjacent resonant columns capacitive coupling structure and
Inductive coupled structure, and the inductive coupled amount size of the capacitive coupling amount of capacitive coupling structure and inductive coupled structure is adjustable；Two
Kind coupled structure exists simultaneously, collectively forms electromagnetism hybrid coupled structure, and the collocation structure connection two is non-conterminous described
Resonant column, it produces capacitive and/or inductive coupled between non-conterminous two resonant columns.
Preferably, the cavity is the metallic cavity of a closing, and it includes top chamber body wall and bottom chamber body wall, described humorous
The post that shakes is fixed on the bottom chamber body wall of cavity vertically, and is left between the top of resonant column and the top chamber body wall of cavity
Gap.
Preferably, multiple frequencies are fixed with the top chamber body wall of the cavity and adjust spiral shell, each frequency adjusts spiral shell corresponding
One resonant column, the every resonant column adjust spiral shell to adjust its resonant frequency by corresponding frequency.
Preferably, the capacitive coupling structure includes the first capacitive coupling part and capacitive coupling adjusts spiral shell, first capacitive
Male part connects two adjacent resonant columns, and insulate and connect with resonant column；The capacitive coupling tune spiral shell is fixed on the top of cavity
It is on portion's cavity wall and relative with the first capacitive coupling part.
Preferably, the first insulating part, the first capacitive coupling are provided between the first capacitive coupling part and resonant column
Component is connected by being insulated between first insulating part and resonant column.
Preferably, the first capacitive coupling part is close to the top of resonant column, and two neighboring first capacitive coupling
Part is upper and lower to be dislocatedly distributed, or forward and backward is dislocatedly distributed.
Preferably, the inductive coupled structure includes inductive coupled conductor and inductive coupled tune spiral shell, described inductive coupled to lead
Bottom of the body between adjacent two resonant columns, the inductive coupled tune spiral shell are arranged on the inductive coupled conductor.
Preferably, the collocation structure includes inductive compensation structure and/or capacitive compensation structure, the inductive compensation structure
Both ends be connected with non-conterminous two resonant columns, the insulation of the capacitive compensation structure and non-conterminous two resonant columns is connected.
Preferably, the capacitive compensation structure includes the second capacitive coupling part and the second insulating part, the second capacitive coupling
Component at least one end is connected by the second insulating part and resonant column insulation.
Preferably, the first capacitive coupling part is held between the space of adjacent two resonant column.
Preferably, the quantity of the resonant column of inductive compensation structure and capacitive compensation the structure bridging is more than two, and both
The quantity of the resonant column of bridging is equal or different.
Preferably, the first, second capacitive coupling part can use sheet metal or metallic plate or metal block structure.
Preferably, first, second insulating part can use insulation spacer or insulation film.
Invention increases inductive compensation structure and/or capacitive compensation structure, increased collocation structure can be in larger model
The position of interior regulation passband near-end transmission zero is enclosed, it so as to improve near-end Out-of-band rejection, while is improved band closer to passband
Interior echo and Insertion Loss index.In addition, the present invention also there is transmission zero can be adjusted independently of resonant frequency, design flexibility
Improve, volume declines, and processing cost reduces, regulation surplus increase, the advantages that not influenceing intermodulation.
Brief description of the drawings
Fig. 1 is the cross section structure diagram of wave filter of the present invention；
Fig. 2 is the dimensional structure diagram of wave filter of the present invention；
Fig. 3 is the curve synoptic diagram of frequency response of the present invention.
Reference：
1st, cavity, 11, top chamber body wall, 12, bottom chamber body wall, 2, resonant column, 3, frequency adjust spiral shell, 4, resonator, 51, the
One capacitive coupling part, 52, capacitive coupling adjust spiral shell, 61, inductive coupled conductor, 62, inductive coupled tune spiral shell, 7, inductive compensation structure,
8th, the second capacitive coupling part, the 81, second insulating part.
Embodiment
Below in conjunction with the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme of the embodiment of the present invention.
Disclosed a kind of adjustable electromagnetic hybrid coupled wave filter, by increasing collocation structure, to improve electromagnetism
The outer proximal inhibition of band of hybrid coupled wave filter, with the performance such as interior echo and Insertion Loss index.
As shown in figure 1, a kind of disclosed adjustable electromagnetic hybrid coupled wave filter, including cavity 1, resonant column 2,
Frequency adjusts spiral shell 3, capacitive coupling structure, inductive coupled structure and collocation structure, wherein, the cavity 1 generally one in the present embodiment
The metallic cavity of closing, it includes top chamber body wall 11 and bottom chamber body wall 12, and the overall structure of this programme is placed in the cavity 1
In.
Resonant column 2 is fixed in cavity 1, and in the present embodiment, more 2 equal vertical spacings of resonant column are fixed on the bottom of cavity
On cavity wall 12, certain gap is left between the top of every resonant column 2 and the top chamber body wall 11 of cavity, there is provided frequency is adjusted
The installing space of spiral shell 3 and/or miscellaneous part.One group of electromagnetism hybrid coupled structure 4, this reality are formed between adjacent two resonant columns 2
Apply resonant column 2 in example and at least provided with three, i.e., at least form two groups of electromagnetism hybrid coupled structures 4.Resonant column 2 is in specified frequency
Place produces resonance, and the height of resonant frequency is related to the length of resonant column 2, and 2 longer resonant frequency of resonant column is lower.
Frequency adjusts spiral shell 3 to be used for the resonant frequency for adjusting resonant column 2 within the specific limits.In the present embodiment, frequency adjusts spiral shell 3
One end is fixed on the top chamber body wall 11 of cavity vertically, and the other end is relative with the top of resonant column 2.Frequency adjusts spiral shell 3 more long humorous
Vibration frequency is lower, conversely, frequency adjusts 3 shorter resonant frequency of spiral shell higher.
Capacitive coupling structure and inductive coupled structure are arranged between adjacent two resonant columns 2 simultaneously, and both produce jointly
Electromagnetism hybrid coupled.The upper part electric field of the resonant column 2 is also easy to produce more by force capacitive coupling, the end portion magnetic of resonant column 2
Field is also easy to produce more by force inductive coupled.Wherein, capacitive coupling structure includes the first capacitive coupling part 51 and capacitive coupling adjusts spiral shell 52, the
One capacitive coupling part 51 connects two adjacent resonant columns 2, and in the present embodiment, the first capacitive coupling part 51 is close to resonant column 2
Top is set, and two neighboring first capacitive coupling part 51 is upper and lower is dislocatedly distributed, and forward and backward can be also dislocatedly distributed.Specific implementation
When, the first capacitive coupling part 51 can use sheet metal to realize that the both ends of sheet metal are individually fixed in the side of adjacent two resonant columns 2
On face, insulation spacer is now provided between the first capacitive coupling part 51 and the side of resonant column 2；As interchangeable, the first appearance
Property male part 51 can also use metallic plate or metal block structure to realize, now metallic plate or metal derby be held in adjacent two it is humorous
Shake between post 2, or both ends are embedded into resonant column 2, now metallic plate or metal derby are coated with a layer insulating.First coupling
Part 51 can also be that one end is connected with the conducting of resonant column 2, and the other end is connected with the insulation of resonant column 2.
Preferably, the first insulating part (not shown) is provided between the first capacitive coupling part 51 and resonant column 2, by this
One insulating part is realized to insulate between resonant column 2 and connected, and can prevent both direct-current short circuits.During implementation, the first insulating part can use
Insulation spacer or insulation film.The size of the capacitive coupling amount of capacitive coupling structure and the first capacitive coupling part 51 (such as sheet metal)
Position and shape it is relevant, the first capacitive coupling part 51 is stronger closer to the top coupling of resonant column 2, and the first capacitive coupling part 51 covers
The bigger coupling of area covered on resonant column is stronger.
Capacitive coupling adjusts spiral shell 52 to be used for the capacitive coupling size for adjusting the first capacitive coupling part 51 within the specific limits.This reality
Apply in example, capacitive coupling adjusts spiral shell 52 to be fixed on the top chamber body wall 11 of cavity and relative with the first capacitive coupling part 51, because of the
One capacitive coupling part 51 connects two adjacent resonant columns 2, and frequency adjusts spiral shell 3 relative with resonant column 2, so, in the present embodiment,
Two neighboring frequency sets a capacitive coupling to adjust spiral shell 52 between adjusting spiral shell 3.Adjust the principle of spiral shell 3 identical with frequency, capacitive coupling adjusts spiral shell 52
The longer coupling amount of length is smaller, conversely, capacitive coupling adjusts the shorter coupling amount of the length of spiral shell 52 bigger.
Inductive coupled structure includes inductive coupled conductor 61 and inductive coupled tune spiral shell 62, and inductive coupled conductor 61 is positioned at adjacent
Bottom between two resonant columns 2, the coupling amount of the more high inductive coupled structure of the inductive coupled height of conductor 61 are bigger.It is inductive coupled
Adjust spiral shell 62 to be located on inductive coupled conductor 61, each inductive coupled corresponding inductive coupled conductor 61 of tune spiral shell 62, pass through adjustment
Inductive coupled tune spiral shell 62 above inductive coupled conductor 61 can adjust the size of inductive coupled amount within the specific limits.Perceptual coupling
Close and adjust the longer coupling amount of the length of spiral shell 62 bigger, conversely, the inductive coupled tune shorter coupling amount of the length of spiral shell 62 is smaller.
When perception and capacitive coupling between adjacent resonant column 2 simultaneously be present, one can be produced near its resonant frequency
Transmission zero, the position of transmission zero is related to the size of capacitive and inductive coupled amount, by adjusting two kinds of coupling amounts respectively
Size can controlling transmission zero point within the specific limits position.
But when transmission zero exceeds tuning range, the present invention is carried out by collocation structure to the position of transmission zero
Amendment.Collocation structure connects two non-conterminous resonant columns 2, i.e., at least bridging three is with resonant column 2, such as three resonant columns of bridging
When 2, that is, the end of collocation structure one is connected on first resonant column, another to terminate on the 3rd resonant column.Collocation structure exists
Capacitive and/or inductive coupled is produced between non-conterminous two resonant columns 2, can be at non-conterminous two by the collocation structure
Capacitive or inductive coupled is produced between resonant column 2, realizes compensation of different nature.
Specifically, collocation structure includes inductive compensation structure 7 and/or capacitive compensation structure, i.e., two kinds of collocation structures can be single
Use solely or simultaneously, wherein, both ends and the resonant column 2 of inductive compensation structure 7 are joined directly together, its distance away from the top of resonant column 2
Bigger inductive compensation amount is smaller, you can by changing distance of the inductive compensation structure 7 away from the top of resonant column 2, to change its perception
Compensation rate.Capacitive compensation structure includes the second capacitive coupling part 8 and the second insulating part 81, and the second capacitive coupling part 8 is extremely
Few second insulating part 81 that is provided between one end and resonant column 2 realizes that insulation is connected, also can both ends be respectively provided with the second insulating part 81, institute
It is metallic rod to state the second capacitive coupling part 8.
Preferably, separated between the second capacitive coupling part 8 and resonant column 2 by the second insulating part 81, it is second exhausted by this
Edge part 81 realizes connection of being insulated between resonant column 2, can prevent both direct-current short circuits.During implementation, the second insulating part 81 can use
Insulation spacer or insulation film.The size of the capacitive compensation amount of capacitive compensation structure is covered in resonance with the second capacitive coupling part 8
Area on post 2 is relevant, and the bigger capacitive compensation of area that the second capacitive coupling part 8 is covered on resonant column 2 is stronger.Certainly, originally
Collocation structure in invention is not limited to as described herein, the perception or capacitive compensation mode of other structures, as long as can provide
The structure of capacitive compensation amount and/or inductive compensation amount is equally applicable to the present invention.
In addition, inductive compensation structure 7 and capacitive compensation structure bridging the quantity of resonant column 2 be more than two, and both bridging
The quantity of resonant column 2 can with equal or different, as inductive compensation structure 7 and capacitive compensation structure can all bridge four resonant columns 2,
Can also four resonant columns 2 of bridging of inductive compensation structure 7, capacitive compensation structure five resonant columns 2 of bridging, etc..
By taking structure shown in Fig. 2 as an example, curve A, is adopted during when not using collocation structure, the frequency response of wave filter is Fig. 3
It is B and C with the frequency response curve after collocation structure, the wherein degree of compensation of C curve is more than B curves.As seen from Figure 3, increase
Add the transmission zero frequency rise of passband near-end after collocation structure, closer to passband, and the bigger transmission zero frequency of degree of compensation
Rate amplification is bigger, and at the same time the Insertion Loss near passband edges and indices of radar are also improved therewith.Therefore, present invention increase
Collocation structure can in a big way it is interior regulation passband near-end transmission zero position, so as to improve near-end Out-of-band rejection, together
Shi Gaishan is with interior echo and Insertion Loss index.
The technology contents and technical characteristic of the present invention have revealed that as above, but those skilled in the art still may base
Make a variety of replacements and modification without departing substantially from spirit of the present invention, therefore, the scope of the present invention in teachings of the present invention and announcement
The content disclosed in embodiment should be not limited to, and various replacements and modification without departing substantially from the present invention should be included, and is this patent Shen
Please claim covered.
Claims (10)
1. a kind of adjustable electromagnetic hybrid coupled wave filter, it includes cavity, at least at least three resonant columns, a capacitive coupling knot
Structure, at least one inductive coupled structure, the resonant column is fixed in cavity and resonant-frequency adjustable caused by it；Adjacent two
Capacitive coupling structure and inductive coupled structure, and the capacitive coupling amount of capacitive coupling structure and perceptual coupling are provided between resonant column
The inductive coupled amount size for closing structure is adjustable；Two kinds of coupled structures exist simultaneously, collectively form electromagnetism hybrid coupled structure；It is special
Sign is：The tunable filter also includes collocation structure, and the collocation structure connects two non-conterminous resonant columns, its
Capacitive and/or inductive coupled is produced between non-conterminous two resonant columns.
2. adjustable electromagnetic hybrid coupled wave filter according to claim 1, it is characterised in that the cavity is a closing
Metallic cavity, it includes top chamber body wall and bottom chamber body wall, and the resonant column is fixed on the bottom cavity of cavity vertically
On wall, and gap is left between the top of resonant column and the top chamber body wall of cavity.
3. adjustable electromagnetic hybrid coupled wave filter according to claim 2, it is characterised in that the top cavity of the cavity
Multiple frequencies are fixed with wall and adjust spiral shell, each frequency adjusts the corresponding resonant column of spiral shell, and the every resonant column passes through correspondingly
Frequency adjust spiral shell adjust its resonant frequency.
4. adjustable electromagnetic hybrid coupled wave filter according to claim 2, it is characterised in that the capacitive coupling structure bag
Include the first capacitive coupling part and capacitive coupling and adjust spiral shell, the first capacitive coupling part connects two adjacent resonant columns, and with it is humorous
The post that shakes insulation connection；The capacitive coupling adjusts spiral shell to be fixed on the top chamber body wall of cavity and relative with the first capacitive coupling part.
5. adjustable electromagnetic hybrid coupled wave filter according to claim 4, it is characterised in that the first capacitive coupling part
The first insulating part is provided between resonant column, the first capacitive coupling part passes through between first insulating part and resonant column
Insulation connection.
6. adjustable electromagnetic hybrid coupled wave filter according to claim 4, it is characterised in that the first capacitive coupling part
Close to the top of resonant column, and the two neighboring first capacitive coupling part is upper and lower is dislocatedly distributed, or forward and backward is dislocatedly distributed.
7. adjustable hybrid coupled wave filter according to claim 1, it is characterised in that the inductive coupled structure includes sense
Property coupling conductors and inductive coupled tune spiral shell, bottom of the inductive coupled conductor between adjacent two resonant columns, the sense
Property coupling adjust spiral shell be arranged on the inductive coupled conductor.
8. adjustable electromagnetic hybrid coupled wave filter according to claim 1, it is characterised in that the collocation structure includes sense
Property collocation structure and/or capacitive compensation structure, the both ends of the inductive compensation structure are connected with non-conterminous two resonant columns, institute
Capacitive compensation structure is stated with the insulation of non-conterminous two resonant columns to be connected.
9. adjustable electromagnetic hybrid coupled wave filter according to claim 8, it is characterised in that the capacitive compensation structure bag
The second capacitive coupling part and the second insulating part are included, described second capacitive coupling part at least one end passes through the second insulating part and resonant column
Insulation connection.
10. adjustable electromagnetic hybrid coupled wave filter according to claim 4, it is characterised in that first capacitive coupling
Part is held between the space of adjacent two resonant column.
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| CN201710699461.6A CN107359394B (en) | 2017-08-15 | 2017-08-15 | Adjustable electromagnetic hybrid coupling filter |
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| CN201710699461.6A CN107359394B (en) | 2017-08-15 | 2017-08-15 | Adjustable electromagnetic hybrid coupling filter |
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| CN107359394B CN107359394B (en) | 2020-09-11 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107895832A (en) * | 2017-12-18 | 2018-04-10 | 江苏贝孚德通讯科技股份有限公司 | Capacitive coupling interaction structure and communication headend equipment part |
| WO2019033268A1 (en) * | 2017-08-15 | 2019-02-21 | 罗森伯格技术（昆山）有限公司 | Adjustable electromagnetic hybrid coupling filter |
| CN110854485A (en) * | 2019-10-18 | 2020-02-28 | 广东通宇通讯股份有限公司 | Common resonator filter |
| CN111446524A (en) * | 2019-01-17 | 2020-07-24 | 罗森伯格技术（昆山）有限公司 | Single-layer cross coupling filter |
| CN112567572A (en) * | 2018-06-04 | 2021-03-26 | 上海诺基亚贝尔股份有限公司 | Cavity filter |
| CN112635940A (en) * | 2020-12-22 | 2021-04-09 | 华沣通信科技有限公司 | Cavity-in-line symmetrical capacitor device of cavity filter |
| WO2021208761A1 (en) * | 2020-04-17 | 2021-10-21 | 安徽安努奇科技有限公司 | Filter structure and filter device |
| CN114024112A (en) * | 2021-12-08 | 2022-02-08 | 江苏贝孚德通讯科技股份有限公司 | Direct-discharge cavity capacitive coupling structure and coupling method |
| CN115498383A (en) * | 2022-10-27 | 2022-12-20 | 摩比天线技术（深圳）有限公司 | Broadband coaxial filter |
| WO2023010558A1 (en) * | 2021-08-06 | 2023-02-09 | Nokia Shanghai Bell Co., Ltd. | Cavity filter |
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| WO2019033268A1 (en) * | 2017-08-15 | 2019-02-21 | 罗森伯格技术（昆山）有限公司 | Adjustable electromagnetic hybrid coupling filter |
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| WO2021208761A1 (en) * | 2020-04-17 | 2021-10-21 | 安徽安努奇科技有限公司 | Filter structure and filter device |
| CN112635940A (en) * | 2020-12-22 | 2021-04-09 | 华沣通信科技有限公司 | Cavity-in-line symmetrical capacitor device of cavity filter |
| WO2023010558A1 (en) * | 2021-08-06 | 2023-02-09 | Nokia Shanghai Bell Co., Ltd. | Cavity filter |
| CN114024112A (en) * | 2021-12-08 | 2022-02-08 | 江苏贝孚德通讯科技股份有限公司 | Direct-discharge cavity capacitive coupling structure and coupling method |
| CN115498383A (en) * | 2022-10-27 | 2022-12-20 | 摩比天线技术（深圳）有限公司 | Broadband coaxial filter |
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