CN207217727U - A kind of minor matters load coaxial cavity harmonic supression filter - Google Patents
A kind of minor matters load coaxial cavity harmonic supression filter Download PDFInfo
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- CN207217727U CN207217727U CN201721044855.XU CN201721044855U CN207217727U CN 207217727 U CN207217727 U CN 207217727U CN 201721044855 U CN201721044855 U CN 201721044855U CN 207217727 U CN207217727 U CN 207217727U
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- coaxial
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- cavity
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Abstract
The utility model discloses a kind of minor matters to load coaxial cavity harmonic supression filter,Including metallic cavity,Formed with linearly arranging the first coaxial resonant cavity for being sequentially communicated in metallic cavity,Second coaxial resonant cavity,3rd coaxial resonant cavity,The both sides of metallic cavity are installed by the first input/output port and the second input/output port,Coupled resonance groove is provided between coaxial resonant cavity two-by-two,The first resonance metal post and the first Metal loading minor matters are provided with first coaxial resonant cavity,The second resonance metal post is provided with second coaxial resonant cavity,The 3rd resonance metal post and the second Metal loading minor matters are provided with 3rd coaxial resonant cavity,First input/output port and the second input/output port are coaxial feeder,The inner wire of first input/output port is extended horizontally on the first resonance metal post,The inner wire of second input/output port is extended horizontally on the 3rd resonance metal post.The utility model can realize good filtering characteristic and out-of-band harmonics rejection characteristic.
Description
Technical field
The technical field of coaxial cavity filter is the utility model is related to, it is humorous to refer in particular to a kind of minor matters loading coaxial cavity
Ripple rejects trap.
Background technology
Today, microwave technology have been obtained for swift and violent development.Wherein, the wave filter frequency-selecting conventional and practical as one
Device is got growing concern for.Microwave filter is the transmitting terminal and the essential device of receiving terminal of Modern Communication System
Part, it plays frequency-selecting to signal, selects useful signal by filtering off useless signal.Resonance circuit is actual design
A kind of relatively conventional circuit, resonance circuit can be generally divided into lumped-parameter circuit and distributed constant circuit in circuitry processes.
Microwave resonator circuits are a kind of circuits that can be used in microwave band.Resonance point in lumped-parameter circuit can only be fixed on certain
On individual specific Frequency point, different from lumped-parameter circuit, microwave resonator circuits have periodic feature, except there is one
Outside base resonant frequency, resonance can be also produced on the integer multiple frequency point of fundamental frequency.This can cause to produce some whole microwaves of influence
The higher modes of system, the design to microwave system make troubles.
In early days, the research in terms of suppressing parasitic passband is constantly in slow development.But nearest 15 years by
In the fast development of microstrip filter, the technology on the suppression parasitic passband of microstrip filter is also closed by many microwave operational persons
Note.Suppress the development innovation of the technology of parasitic passband, the research and development of cavity harmonic supression filter relative to microstrip filter
Just relatively seem slow.1964, H.J.RIBLBT applied for a patent the width proposed by changing cascade rectangular cavity
Spend to suppress parasitic passband, although H.J.RIBLBT does not provide good inhibition figure, his idea gives follow-up
The very big inspiration of researcher.
Coaxial cavity filter has the advantages that insertion consume is low, and power capacity is big, stable performance, flexible design, and it should
Field is also more and more extensive.Especially in the receiving front-end of microwave system, have become integral microwave passive device
Part.Coaxial cavity filter higher hamonic wave can occur near fundamental frequency f0 treble frequency, be produced at unwanted frequency humorous
Shake, directly affect the frequency-selecting of wave filter and go dry performance.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, it is proposed that a kind of simple in construction, flexible design, body
Accumulate small, Wide stop bands, easy processing, load coaxial cavity harmonic supression filter with the good minor matters of interior performance, can reach good
First pass-band performance, there is preferable harmonic suppression effect at frequency tripling.
To achieve the above object, technical scheme provided by the utility model is：A kind of minor matters load coaxial cavity harmonic wave
Rejects trap, includes metallic cavity, in the metallic cavity formed with linearly arrange be sequentially communicated it is first coaxially humorous
Shake chamber, the second coaxial resonant cavity, the 3rd coaxial resonant cavity, and the both sides of the metallic cavity are respectively provided with an input/output terminal
Mouthful, respectively the first input/output port and the second input/output port；First coaxial resonant cavity, the second coaxial resonant cavity
Between be provided with the first coupled resonance groove, be provided with the second coupling between second coaxial resonant cavity, the 3rd coaxial resonant cavity
Resonant slots, the first coupled resonance groove, the second coupled resonance groove are located at the bottom of metallic cavity, the first coupled resonance groove,
The notch of second coupled resonance groove is short-circuit end, and bottom land is open end, the coupling between the effect of depth coaxial resonant cavity of bottom land
Coefficient；The first resonance metal post and the first Metal loading minor matters, first resonance are provided with first coaxial resonant cavity
Metal column is vertically installed at the bottom of the first coaxial resonant cavity, and the lower end of the first resonance metal post is short-circuit end, and upper end is to open
Terminal, and the first resonance metal post and the first coaxial resonant cavity are coaxial, are formed as the inner wire and outer conductor of coaxial line, it is described
First Metal loading minor matters are horizontally arranged on the first resonance metal post, and parallel to the bottom of the first coaxial resonant cavity；It is described
The second resonance metal post is provided with second coaxial resonant cavity, the second resonance metal post is vertically installed at the second coaxial resonance
The bottom of chamber, the lower end of the second resonance metal post is short-circuit end, and upper end is open end, and the second resonance metal post and second
Coaxial resonant cavity is coaxial, is formed as the inner wire and outer conductor of coaxial line；It is humorous that the 3rd is provided with 3rd coaxial resonant cavity
Shake metal column and the second Metal loading minor matters, the 3rd resonance metal post be vertically installed at the bottom of the 3rd coaxial resonant cavity,
The lower end of 3rd resonance metal post is short-circuit end, and upper end is open end, and the 3rd resonance metal post and the 3rd coaxial resonance
Chamber is coaxial, is formed as the inner wire and outer conductor of coaxial line, and the second Metal loading minor matters are horizontally arranged at the 3rd resonance gold
Belong on post, and parallel to the bottom of the 3rd coaxial resonant cavity；First input/output port and the second input/output port are equal
For coaxial feeder, the inner wire of first input/output port is extended horizontally on the first resonance metal post, second input
The inner wire of output port is extended horizontally on the 3rd resonance metal post.
The first Metal loading minor matters and the second Metal loading minor matters are radius and length identical metal cylinder, and this
One Metal loading minor matters are different with the setting height(from bottom) of the second Metal loading minor matters.
First coaxial resonant cavity, the second coaxial resonant cavity, the fundamental resonance frequencies of the 3rd coaxial resonant cavity are identical, high
Secondary mould resonant frequency staggers.
The first resonance metal post, the second resonance metal post, the 3rd resonance metal post, the first Metal loading minor matters,
Two Metal loading minor matters are hollow structure.
The metallic cavity is square metal cavity.
The utility model compared with prior art, has the following advantages that and beneficial effect：
1st, fundamental resonance frequencies phase can ensured by the metal-loaded minor matters on resonance metal post, metal-loaded minor matters
With in the case of, change the resonant frequency of higher hamonic wave.Different loading height will produce different higher order resonant frequencies, so as to
Cause that three coaxial resonance fundamental resonance frequencies are identical, and high-order mode resonance frequency staggers, preferably suppress special so as to have to harmonic wave
Property.
2nd, the utility model has a filtering characteristic in preferable passband, and out-of-band harmonics rejection characteristic is good.
3rd, the utility model has simple in construction, and design is easy, the advantages of easy processing.
Brief description of the drawings
Fig. 1 is the overall structure diagram that minor matters of the present utility model load coaxial cavity harmonic supression filter.
Fig. 2 is the front view that minor matters of the present utility model load coaxial cavity harmonic supression filter.
Fig. 3 is the top view that minor matters of the present utility model load coaxial cavity harmonic supression filter.
Fig. 4 is the simulation result figure of the coaxial cavity filter before minor matters load.
Fig. 5 is the simulation result figure of the coaxial cavity filter after minor matters loading.
Embodiment
The utility model is described further with reference to specific embodiment.
Coaxial cavity harmonic supression filter is loaded referring to the minor matters that shown in Fig. 1 to Fig. 3, the present embodiment is provided, including
Have a metallic cavity 4 being square, in the metallic cavity 4 formed with linearly arrange be sequentially communicated the first coaxial resonant cavity,
Second coaxial resonant cavity, the 3rd coaxial resonant cavity, the both sides of the metallic cavity 4 are respectively provided with an input/output port, point
Wei not the first input/output port 3 and the second input/output port 7；First coaxial resonant cavity, the second coaxial resonant cavity it
Between be provided with the first coupled resonance groove 10, be provided with the second coupling between second coaxial resonant cavity, the 3rd coaxial resonant cavity
Resonant slots 8, the first coupled resonance groove 10, the second coupled resonance groove 8 are located at the bottom of metallic cavity 4, and first coupling is humorous
Shake groove 10, the notch of the second coupled resonance groove 8 is short-circuit end, and bottom land is open end, the effect of depth coaxial resonant cavity of bottom land it
Between the coefficient of coup；The first resonance metal post 1 and the first Metal loading minor matters 2, institute are provided with first coaxial resonant cavity
The bottom that the first resonance metal post 1 is vertically installed at the first coaxial resonant cavity is stated, the lower end of the first resonance metal post 1 is short circuit
End, upper end is open end, and the first resonance metal post 1 is coaxial with the first coaxial resonant cavity, is formed as the inner wire of coaxial line
And outer conductor, the first Metal loading minor matters 2 are horizontally arranged on the first resonance metal post 1, and it is coaxial humorous parallel to first
Shake the bottom of chamber；The second resonance metal post 9 is provided with second coaxial resonant cavity, the second resonance metal post 9 is vertical
Installed in the bottom of the second coaxial resonant cavity, the lower end of the second resonance metal post 9 is short-circuit end, and upper end is open end, and should
Second resonance metal post 9 and the second coaxial resonant cavity are coaxial, are formed as the inner wire and outer conductor of coaxial line；Described 3rd is coaxial
The 3rd resonance metal post 6 and the second Metal loading minor matters 5 are provided with resonator, the 3rd resonance metal post 6 is vertically-mounted
In the bottom of the 3rd coaxial resonant cavity, the lower end of the 3rd resonance metal post 6 is short-circuit end, and upper end is open end, and the 3rd
Resonance metal post 6 and the 3rd coaxial resonant cavity are coaxial, are formed as the inner wire and outer conductor of coaxial line, second Metal loading
Minor matters 5 are horizontally arranged on the 3rd resonance metal post 6, and parallel to the bottom of the 3rd coaxial resonant cavity；First input is defeated
The input/output port 7 of exit port 3 and second is coaxial feeder, and characteristic impedance is 50 Ω, first input/output port 3
Inner wire is extended horizontally on the first resonance metal post 1, and it is humorous that the inner wire of second input/output port 7 extends horizontally in the 3rd
Shake on metal column 6.The first resonance metal post 1, the second resonance metal post 9, the 3rd resonance metal post 6, the first Metal loading
Minor matters 2, the inside of the second Metal loading minor matters 5 are emptied to mitigate weight.The first loading minor matters 2 and second load minor matters 5
For radius and length identical metal cylinder, the setting height(from bottom) of the first Metal loading minor matters 2 and the second Metal loading minor matters 5 is not
Together, the first coaxial resonant cavity, the second coaxial resonant cavity, the fundamental resonance frequencies of the 3rd coaxial resonant cavity are identical, high-order mode resonance
Frequency staggers.
It is shown in Figure 4, it is shown that the simulation result of the wave filter before minor matters are not loaded, it can be seen that
In fundamental frequency f0Treble frequency f1There is higher hamonic wave.f0=0.9GHz, f1Approximately equal to 2.65GHz.
It is shown in Figure 5, it is shown that the simulation result of the wave filter after minor matters loading, it can be seen that in passband
Interior (f0=0.9GHz) there is a good selectivity, return loss shows preferable suppression in more than 20dB at treble frequency
Characteristic, inhibition is in more than 20dB.
Embodiment described above is only the preferred embodiment of the utility model, not limits implementation of the present utility model with this
Scope, therefore the change that all shape, principles according to the utility model are made, all should cover in the scope of protection of the utility model.
Claims (5)
1. a kind of minor matters load coaxial cavity harmonic supression filter, include metallic cavity, it is characterised in that：The wire chamber
In vivo formed with linearly arranging the first coaxial resonant cavity being sequentially communicated, the second coaxial resonant cavity, the 3rd coaxial resonant cavity, institute
The both sides for stating metallic cavity are respectively provided with an input/output port, respectively the first input/output port and the second input and output
Port；The first coupled resonance groove is provided between first coaxial resonant cavity, the second coaxial resonant cavity, described second is coaxial humorous
Shake and the second coupled resonance groove is provided between chamber, the 3rd coaxial resonant cavity, the first coupled resonance groove, the second coupled resonance groove
Positioned at the bottom of metallic cavity, the first coupled resonance groove, the notch of the second coupled resonance groove are short-circuit end, and bottom land is open circuit
Hold, the coefficient of coup between the effect of depth coaxial resonant cavity of bottom land；The first resonance is provided with first coaxial resonant cavity
Metal column and the first Metal loading minor matters, the first resonance metal post are vertically installed at the bottom of the first coaxial resonant cavity, should
The lower end of first resonance metal post is short-circuit end, and upper end is open end, and the first resonance metal post and the first coaxial resonant cavity
Coaxially, the inner wire and outer conductor of coaxial line are formed as, the first Metal loading minor matters are horizontally arranged at the first resonance metal
On post, and parallel to the bottom of the first coaxial resonant cavity；The second resonance metal post, institute are provided with second coaxial resonant cavity
The bottom that the second resonance metal post is vertically installed at the second coaxial resonant cavity is stated, the lower end of the second resonance metal post is short circuit
End, upper end is open end, and the second resonance metal post and the second coaxial resonant cavity are coaxial, be formed as the inner wire of coaxial line with
Outer conductor；The 3rd resonance metal post and the second Metal loading minor matters are provided with 3rd coaxial resonant cavity, the described 3rd is humorous
The metal column that shakes is vertically installed at the bottom of the 3rd coaxial resonant cavity, and the lower end of the 3rd resonance metal post is short-circuit end, and upper end is
Open end, and the 3rd resonance metal post and the 3rd coaxial resonant cavity are coaxial, are formed as the inner wire and outer conductor of coaxial line, institute
The second Metal loading minor matters are stated to be horizontally arranged on the 3rd resonance metal post, and parallel to the bottom of the 3rd coaxial resonant cavity；Institute
It is coaxial feeder to state the first input/output port and the second input/output port, the inner wire of first input/output port
Extend horizontally on the first resonance metal post, the inner wire of second input/output port extends horizontally to the 3rd resonance metal post
On.
A kind of 2. minor matters loading coaxial cavity harmonic supression filter according to claim 1, it is characterised in that：Described
One Metal loading minor matters and the second Metal loading minor matters are radius and length identical metal cylinder, the first Metal loading minor matters
It is different with the setting height(from bottom) of the second Metal loading minor matters.
A kind of 3. minor matters loading coaxial cavity harmonic supression filter according to claim 1, it is characterised in that：Described
One coaxial resonant cavity, the second coaxial resonant cavity, the fundamental resonance frequencies of the 3rd coaxial resonant cavity are identical, and high-order mode resonance frequency is wrong
Open.
A kind of 4. minor matters loading coaxial cavity harmonic supression filter according to claim 1, it is characterised in that：Described
One resonance metal post, the second resonance metal post, the 3rd resonance metal post, the first Metal loading minor matters, the second Metal loading minor matters
It is hollow structure.
A kind of 5. minor matters loading coaxial cavity harmonic supression filter according to claim 1, it is characterised in that：The gold
Category cavity is square metal cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721044855.XU CN207217727U (en) | 2017-08-21 | 2017-08-21 | A kind of minor matters load coaxial cavity harmonic supression filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721044855.XU CN207217727U (en) | 2017-08-21 | 2017-08-21 | A kind of minor matters load coaxial cavity harmonic supression filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207217727U true CN207217727U (en) | 2018-04-10 |
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ID=61815694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721044855.XU Withdrawn - After Issue CN207217727U (en) | 2017-08-21 | 2017-08-21 | A kind of minor matters load coaxial cavity harmonic supression filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207217727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579321A (en) * | 2017-08-21 | 2018-01-12 | 华南理工大学 | A kind of minor matters load coaxial cavity harmonic supression filter |
-
2017
- 2017-08-21 CN CN201721044855.XU patent/CN207217727U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579321A (en) * | 2017-08-21 | 2018-01-12 | 华南理工大学 | A kind of minor matters load coaxial cavity harmonic supression filter |
| CN107579321B (en) * | 2017-08-21 | 2019-12-10 | 华南理工大学 | Branch knot loading coaxial cavity harmonic suppression filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180410 Effective date of abandoning: 20191210 |