CN106356600B - Signal transmitting apparatus - Google Patents
Signal transmitting apparatus Download PDFInfo
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- CN106356600B CN106356600B CN201510416167.0A CN201510416167A CN106356600B CN 106356600 B CN106356600 B CN 106356600B CN 201510416167 A CN201510416167 A CN 201510416167A CN 106356600 B CN106356600 B CN 106356600B
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Abstract
The present invention provides a kind of signal transmitting apparatus, comprising: waveguide has the first coupling window being formed thereon, and is configured as transmitting received signal；Coupled resonance cavity filter, it includes the two equal number of resonant cavities of column, wherein first end resonant cavity is configured as connection coaxial transmission line, and second end resonant cavity has the second coupling window being formed thereon, second end resonant cavity is configured as being coupled to waveguide by the first, second coupling window, so that second end resonant cavity and waveguide share a volume.According to the technical solution of the present invention, it realizes by adjusting the connection between coupled resonance cavity filter and external waveguide, and then realizes required energy transmission (coupling), the intrinsic frequency without will affect end resonant cavity.
Description
Technical field
The present invention is about filter field more particularly to a kind of letter with the waveguide for being connected to coupled resonance cavity filter
Number transmitting device.
Background technique
Resonant cavity band-pass filter plays important role in a communications system, and directly influences communication quality.
Wireless communication technique constantly develops, and resonant cavity band-pass filter will be used to realize the transmission of higher power signal.
When waveguide resonant cavity bandpass filter has coaxial (TEM mode) port and a waveguide type port,
If it is used to transmit microwave signal, it will the input/output for generating some constants approximate with frequency load and/or holding couples phase
The problem of pass.When so-called collapsible filter topology is implemented, especially it has two groups of equal numbers (for example every
Group is 3) resonant cavity when, or when the linear topology structure with a coaxial port and waveguide port as shown in Figure 1, on
State the problem of being previously mentioned by particularly with following aspect in relation to: (a) be connected with waveguide port end resonant cavity frequency load, but
This kind loads the cutoff frequency that will reduce resonant cavity；(b) the defeated of approximate constant is kept on the tunable reference filter given
Enter/output coupling, without particularly adjusting device
The current technical solution for being used to solve these problems usually has strict requirements to resonant cavity, or will affect filter
The performance of itself.Therefore, the filter assembly with good coupling effect is needed.
Summary of the invention
In view of the above problems, generating filtering in the case where the present invention is directed to not change the natural resonance frequency of end resonant cavity
The required coupling of the device extremely waveguide of attachment.
The invention proposes a kind of signal transmitting apparatus, comprising: and waveguide has the first coupling window being formed thereon,
And it is configured as transmitting received signal；Coupled resonance cavity filter comprising the two equal number of resonant cavities of column,
Middle first end resonant cavity, which is configured as connection coaxial transmission line and second end resonant cavity, has the second coupling being formed thereon
Window, the second end resonant cavity is configured as being coupled to the waveguide by first, second coupling window, so that described
Second end resonant cavity and the waveguide share a volume.
Preferably, the size of first coupling window and second coupling window determines the frequency being suitble to wherein transmitting
Range.
Preferably, first coupling window is formed at first jiao of the waveguide, and second coupling window is formed
The coupled resonance cavity filter it is second jiao corresponding with described first jiao at.
Preferably, first coupling window and second coupling window are adjustable, to adjust the second end resonant cavity
The magnetic field strength at place.
Preferably, the waveguide further include: cavity；At least two isolated adjusting bolts are located in the cavity, use
In by precession or screwing out at least one and adjust bolt and adjust the electric field strength at the second end resonant cavity.
Preferably, each bolt that adjusts is used to adjust the signal at least partly different frequency ranges.
Preferably, the waveguide further includes on the bottom side of the cavity along three separated adjusting spiral shells of center line distribution
Bolt.
Preferably, the frequency range is determined by the distance between every two adjuster screw.
Preferably, second coupling window is L shape.
Preferably, first of second coupling window is formed on the top of the strong antetheca of second coupling, and
Second of second coupling window is formed on the top of the strong side wall of second coupling.
According to the technical solution of the present invention, it realizes by adjusting the company between coupled resonance cavity filter and external waveguide
It connects, and then realizes required energy transmission (coupling), the intrinsic frequency without will affect end resonant cavity.
Detailed description of the invention
After description by reference to a specific embodiment of the invention given by following drawings, it is better understood with this
Invention, and other objects of the present invention, details, features and advantages will become apparent.In the accompanying drawings:
Fig. 1 shows the schematic diagram of linear waveguide filter；
Fig. 2 shows the signal transmitting apparatus including waveguide resonant cavity filter；
Fig. 3 shows the front view of signal transmitting apparatus in Fig. 2；
Fig. 4 shows the side view of signal transmitting apparatus in Fig. 2；
Fig. 5 shows the distribution of three adjusting bolts.
Specific embodiment
The preferred embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without the embodiment party that should be illustrated here
Formula is limited.On the contrary, these embodiments are provided so that this disclosure will be more thorough and complete, and can be by the disclosure
Range is fully disclosed to those skilled in the art.
In order to solve the problems, such as a, the length of two, filter end resonant cavities is usually reduced, while subsequent resonant cavity is about
For the half-wavelength of resonance frequency.However, when the filter has the topological structure folded and different port type, example
It is waveguide type if a port is another coaxial port, that above-mentioned technical solution will not act on such filter.
In this case, two end resonant cavity length having the same are often required that.Fig. 1 shows the principle of linear waveguide filter
Figure.Here, the length Θ 1 at end filter, Θ n can be adjusted to compensate X0,1,Xn,n+1The effect at place.
In order to solve the problems, such as b, common solution is adjustable device, for example, tunes adjustable coupling loop.For height
Power filter, this scheme usually will affect the power capacity of filter.
Coupling between the resonant cavity and external waveguide of waveguide type usually has inductive, that is to say, that the coupling of energy
Conjunction is realized by the equal magnetic field in filter cavity and waveguide.X in Fig. 10,1At position, magnetic field has maximum
Value, and coupling, generally referred to herein as " bore " are realized by being simply open.However, the opening is for resonant cavity frequency
Eigenfrequency have strong influence.Therefore, in the case where the present invention is directed to not change the natural resonance frequency of end resonant cavity,
Generate the required coupling of the waveguide of filter to attachment.
An embodiment according to the present invention is coupled the resonant cavity of external waveguide and waveguide filter by coupling window
Technical solution, which can be used for excluding undesirable frequency load, to be influenced.
Fig. 2 shows the signal transmitting apparatus including waveguide and coupled resonance cavity filter.
As shown in Fig. 2, the signal transmitting apparatus includes coupled resonance cavity filter 210 and waveguide 212, wherein the coupling is humorous
Vibration cavity filter 210 is the resonant cavity filter of so-called folding and arranges equal number of resonant cavities, such as every group including two
Include 3 resonant cavities.Input port 211 is disposed at first end resonant cavity 213 and is configured as and TEM mode transmission line
(not shown) electrical connection, and output port 212 is disposed at the angle of second end resonant cavity 214 and is coupled at least one
Point external waveguide 212, thus by the external waveguide 212 arrangement caused by influence be minimized, and required energy
Transmission (coupling) will not excessively influence the intrinsic frequency of the resonant cavity.
When second end resonant cavity 214 and external waveguide 212 realize coupling by respective coupling window, so that resonant cavity
214 and external waveguide 212 have common chamber.Particularly, the first coupling window is formed at first jiao of external waveguide 212, and
And second coupling window be formed at coupled resonance cavity filter 212, second jiao corresponding with first jiao.Two coupling windows can
To have the size suitable for unlike signal frequency, and the size of the coupling window is inversely proportional be suitble to signal frequency, this
Mean that coupling window is bigger, the signal frequency being suitble to is lower.
Input port and output port are disposed at identical surface S1, and external waveguide 212 and second end are humorous
Vibration chamber 214 is with enjoying a volume, so that the connection of external waveguide 212 and the second resonant cavity 213 is only energy from filter transfer
To the mode of waveguide, do not have other unwanted side effects.
In addition, there is also openings between resonant cavity 213 and 214, which can in coupled resonance cavity filter 210
The inductance between the two or capacitor coupling is provided to be adapted to required filter transfer function.Therefore, it is arranged in resonant cavity
The external waveguide of 21 corner of filter can adjust magnetic field and/or electric field at resonant cavity 214, to provide close to normal
Several couplings.When input port receive signal when, the signal will followed by resonant cavity 213,215,217,218,216 and 214,
And it is exported at external waveguide 212, therefore, the direction output and input is substantially parallel.
As shown in figure 3, the first adjusting bolt b1 is located in the cavity of external waveguide by changing its height in cavity
Degree is to adjust electric field strength, and the first part of the second coupling window CW is formed in the top of 214 antetheca of resonant cavity.In order to reduce
The influence as caused by the arrangement of the waveguide, the width W1 of the first part of the second coupling window CW are less than λ/4, while external waveguide
Width W2 be greater than λ/2.In addition, resonant cavity 214 has substantially square cross section, and width is greater than λ/2, that is,
It says, the width of the antetheca of resonant cavity 213 is greater than λ/2.Used herein of the maximum of the λ signal for being adapted for transmitting in the resonant cavity
Wavelength.In addition, work can also be carried out in a manner of small " capacitive load " or served as small " capacitive load " by adjusting bolt, consequently facilitating
Realize impedance matching, and minimize reflection effect, thus realize filter to waveguide power transmission maximization, it is on the contrary
?.
As shown in figure 4, there are three adjust bolt b1-b3, and the second coupling window CW for tool in the cavity of external waveguide 212
Second part be formed in resonant cavity 214 side wall top.
Second coupling window CW is L shape, and realizes the coupling on two adjacent surfaces by the first, second part.When micro-
When wave signal self-resonance chamber 214 is transmitted to external waveguide 212, energy can pass through the first, second part of the second coupling window CW
It is transmitted.The length of first part and second part is respectively less than λ/4, therefore reduces influence of the frequency load to coupling.When
When the height of second coupling window CW increases, field coupling amount associated with the size of the second coupling window CW will also be increased with it.
When the second coupling window CW is when being dimensioned, the magnetic field strength at second end resonant cavity 214 is also correspondingly true
It is fixed.Therefore, adjusting coupling between resonant cavity and waveguide can realize by adjusting the electric field strength at external waveguide.This three
The independent bolt that adjusts provides through at least one of three bolts of precession or back-out the side for adjusting electric field strength herein
Method.
Referring to Figure 4 and 5, three adjusting bolt arow arrangements.Based on the distribution of the electric field at external waveguide 212, three
Adjust the bottom side that bolt is preferably arranged in cavity by the center line along cavity bottom side.Three bolts need to have to each other certain
Compartment of terrain distribution, for example, d1, d2, d3, so as to be covered each by different frequency ranges, so that signal transmitting apparatus
Can satisfy transmission has the requirement of signal of different frequency.
, it is understood that three frequency ranges can have the frequency band of at least one overlapping, that is to say, that each tune
Save the corresponding at least partly different frequency range of bolt.In the case, when user wants to adjust for the signal that frequency is F1
When electric field strength, he, which can choose to twist, adjusts bolt b1, or twists and adjust bolt b1 and b2, and even b1, b2 and b3. are in the present invention
Embodiment in, when bolt b1 is threaded into, electric field strength is elevated.
Connection between coupled resonance cavity filter 210 and external waveguide 212 realizes required energy transmission (coupling),
Intrinsic frequency without will affect end resonant cavity.The end resonant cavity and external waveguide share identical volume, this is different from passing through
The conventional method that the waveguide that bore flange is realized is connect with filter end resonant cavity.
It should be understood that the protection scope that the above embodiments are not intended to limit the invention, all without departing substantially from this hair
The modifications and variations of bright thought should all be covered by the invention.For example, coupled resonance cavity filter 212 can have 4,6,8 or
Any even number even odd number resonant cavity, and the first and second coupling windows can also be adjustable, so as to adjust the
Magnetic field strength at two end resonant cavities.The window can not only adjust length of magnetic field in Shangdi to a certain degree, additionally it is possible to determine to realize
Stiffness of coupling needed for filter transfer function.
Those variations are all considered in the range in the present invention and the attached claims.Protection scope of the present invention by
Claim is limited.Verb " comprising " illustrates in addition to element defined in claim, can also include other elements.
Claims (10)
1. a kind of signal transmitting apparatus, comprising:
Waveguide has the first coupling window being formed thereon, and is configured as transmitting received signal；
Coupled resonance cavity filter comprising the two equal number of resonant cavities of column, wherein first end resonant cavity is configured as connecting
Coaxial transmission line and second end resonant cavity have the second coupling window being formed thereon, and the second end resonant cavity is configured
To be coupled to the waveguide by first, second coupling window, so that the second end resonant cavity and the waveguide are total
With a volume.
2. the size of signal transmitting apparatus as described in claim 1, first coupling window and second coupling window determines
It is suitble in the frequency range wherein transmitted.
3. signal transmitting apparatus as described in claim 1, wherein first coupling window is formed in first jiao of the waveguide
Place, and second coupling window be formed in the coupled resonance cavity filter it is second jiao corresponding with described first jiao at.
4. signal transmitting apparatus as described in claim 1, wherein first coupling window and second coupling window are adjustable
, to adjust the magnetic field strength at the second end resonant cavity.
5. signal transmitting apparatus as described in claim 1, wherein the waveguide further include:
Cavity；
At least two isolated adjusting bolts are located in the cavity, adjust spiral shell for passing through precession or screwing out at least one
Bolt adjusts the electric field strength at the second end resonant cavity.
6. signal transmitting apparatus as claimed in claim 5, wherein each adjusting bolt is for adjusting at least partly different frequencies
Signal in rate range.
7. signal transmitting apparatus as claimed in claim 5, wherein the waveguide further include on the bottom side of the cavity in
Three separated adjusting bolts of heart line distribution.
8. signal transmitting apparatus as claimed in claim 6, wherein the frequency range by every two adjust bolt between away from
From being determined.
9. signal transmitting apparatus as described in claim 1, second coupling window is L shape.
10. signal transmitting apparatus as claimed in claim 9, wherein first of second coupling window is formed on described
The top of the antetheca of second end resonant cavity, and second of second coupling window is formed on the second end resonant cavity
The top of side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510416167.0A CN106356600B (en) | 2015-07-15 | 2015-07-15 | Signal transmitting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510416167.0A CN106356600B (en) | 2015-07-15 | 2015-07-15 | Signal transmitting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106356600A CN106356600A (en) | 2017-01-25 |
| CN106356600B true CN106356600B (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510416167.0A Active CN106356600B (en) | 2015-07-15 | 2015-07-15 | Signal transmitting apparatus |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2305762Y (en) * | 1997-07-02 | 1999-01-27 | 中国航天工业总公司第五研究院第五○四研究所 | One cavity three mode double operation device having one or two feedback |
| US6191664B1 (en) * | 1999-05-24 | 2001-02-20 | Space Systems/Loral, Inc. | Microwave multiplexer with tunable manifold and method of adjustment |
| EP0788180B1 (en) * | 1996-01-30 | 2003-08-27 | TELECOM ITALIA S.p.A. | Multi-mode cavity for waveguide filters |
| CN102544649A (en) * | 2012-01-04 | 2012-07-04 | 西安电子科技大学 | One-cavity three-mode filter |
-
2015
- 2015-07-15 CN CN201510416167.0A patent/CN106356600B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0788180B1 (en) * | 1996-01-30 | 2003-08-27 | TELECOM ITALIA S.p.A. | Multi-mode cavity for waveguide filters |
| CN2305762Y (en) * | 1997-07-02 | 1999-01-27 | 中国航天工业总公司第五研究院第五○四研究所 | One cavity three mode double operation device having one or two feedback |
| US6191664B1 (en) * | 1999-05-24 | 2001-02-20 | Space Systems/Loral, Inc. | Microwave multiplexer with tunable manifold and method of adjustment |
| CN102544649A (en) * | 2012-01-04 | 2012-07-04 | 西安电子科技大学 | One-cavity three-mode filter |
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| CN106356600A (en) | 2017-01-25 |
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