CN107039712A - One kind is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube - Google Patents
One kind is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube Download PDFInfo
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- CN107039712A CN107039712A CN201710281794.7A CN201710281794A CN107039712A CN 107039712 A CN107039712 A CN 107039712A CN 201710281794 A CN201710281794 A CN 201710281794A CN 107039712 A CN107039712 A CN 107039712A
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- waveguide
- elbow
- mould
- compact
- traveling wave
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/02—Bends; Corners; Twists
- H01P1/022—Bends; Corners; Twists in waveguides of polygonal cross-section
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/02—Bends; Corners; Twists
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Abstract
It is applied to TE1 the invention discloses one kind, the compact overmoded waveguide elbow of 1 mould gyrotron traveling wave tube belongs to HIGH-POWERED MICROWAVES transmission apparatus field.The elbow includes two sections of rectangular circular waveguide transition structures of 90 ° of bending rectangular waveguides and the connection of its two ends, and three-stage structure internal cavity junction is seamlessly transitted.Circular polarisation TE1,1Mould ripple causes the TE on the cross polarization direction of generation due to the difference of the longer wide-edge of rectangular waveguide after circle rectangular waveguide transition1,0Mould and TE0,1There is difference in mould guided wave speed, so as to there is phase difference；And then after being turned by 90 ° of follow-up bending rectangular waveguides, phase difference further expands.In output end, the phase of beamformer output is required to carry out last adjustment according to output using rectangular circular waveguide changeover portion.Elbow of the present invention can be while lead beam high efficiency be turned, and the wave beam for realizing particular polarization state according to application demand is exported, and whole elbow structure is simple, it is easy to processed.
Description
Technical field
The invention belongs to HIGH-POWERED MICROWAVES transmission apparatus field, and in particular to one kind is applied to TE1,1Mould gyrotron traveling wave tube
Compact overmoded waveguide elbow.
Background technology
HIGH-POWERED MICROWAVES millimeter wave is in remote high-resolution radar, electron cyclotron resonance heating, super jammer, acceleration
The field of scientific studies such as device, fine ceramics sintering, material surface processing, plasma chemistry have extensive use.Convolution traveling wave
Pipe has high power, wide band feature, is the preferable high-power source in microwave and millimeter wave frequency range.TE1,1Mould is circular waveguide base
Mould, from it as mode of operation, advantageously reduces the competition of device internal schema, improves device gain, thus is gyrotron traveling wave tube
Conventional mode of operation.According to the working characteristics of gyrotron traveling wave tube, the TE of output1,1Mould is circular polarization state.In practical application
In, difference according to demand, it is sometimes desirable to be converted into particular polarization wave beam using high-power polarizer.
During microwave transmission, in order to which the densification that system was propagated, realized to effective lead beam is laid out, it is necessary to use
Waveguide bend changes the direction of propagation of wave beam.For the requirement for meeting power source output, the loss of reduction Transmission system, transmission
Device on link was mould device including waveguide bend (i.e. the size of device is much larger than operation wavelength).Cross mould device internal memory
Waveguide mode enrich, disturbance somewhat can easily encourage spurious mode, reduction transmission performance.Beam steering can be destroyed
The uniformity of transmission line, easily produces spurious mode.Therefore, the generation of spurious mode is suppressed, it is ensured that the polarization of beamformer output is special
Property is the key for developing high-power overmoded waveguide elbow.At present, realize that the mode that HIGH-POWERED MICROWAVES is effectively turned has：Based on ellipse
The elbow of waveguiding structure, the elbow based on Circular waveguides and oblique angle elbow.The waveguide bend of oval structure is ensureing single mode biography
In the case of defeated, it is possible to achieve the efficient pattern transmission of broadband.But in order to ensure single mode transport condition, elliptical wave jig
It is very little smaller, limited power capacity, it is difficult to realize high power transmission.In addition, particularity of the elliptical waveguide elbow due to its structure, right
The requirement of process and assemble is very high.Circular waveguide elbow guides TE1,1When mould is turned, easily TM has been encouraged0,1Mould, TE2,1The parasitic modes such as mould
Formula.In order to improve efficiency of transmission, it is necessary to increase radius of turn, so that whole device volume is huge.Oblique angle elbow passes through mirror
The mode of face reflection realizes the steering of wave beam.In order to reduce wave beam in the diffraction of mirror, it is necessary to which Land use models transforming section is produced
The mixed mode of raw proper proportion, beam spot is minimum when it reaches minute surface center.Oblique angle elbow has efficiency of transmission height, mode purity
High the features such as.But, due to the use of patten transformation section so that whole turning structure is bulky, is unsatisfactory for HIGH-POWERED MICROWAVES
The densification requirement of system.
The content of the invention
In order to meet requirement of the application-specific system for the longitudinal height of transmitter system, high-power milli is improved as much as possible
Densification degree, efficiency of transmission and the mode purity of metric wave system, the present invention propose a kind of suitable for TE1,1Mould convolution traveling wave
The compact overmoded waveguide elbow of pipe, the elbow can be realized while lead beam high efficiency is turned according to application demand
The wave beam output of particular polarization state, and whole elbow structure is simple, it is easy to process.
The present invention is achieved through the following technical solutions：
A kind of the high-power of compact crosses mould microwave elbow, including 90 ° bend the two of rectangular waveguides and the connection of its two ends
Section rectangle-circular waveguide transition structure, three-stage structure internal cavity junction is seamlessly transitted.
Three parts of the composition elbow are connected by concave-convex flange, and are furnished with shop bolt in flange connections, with
Ensure assembly precision.
The two sections of rectangles-circular waveguide transition structure is that radius fades to the transition structure of rectangle from circle vertically, can be with
Realized by way of linearly or nonlinearly, wherein being determined as the circular waveguide size of input by prime microwave input structure
It is fixed, as output end circular waveguide size by follow-up microwave transmission device input port structures shape.
The length of the two sections of rectangles-circular waveguide transition structure can be with identical so that waveguide bend structure is symmetric.
The length of the two sections of rectangles-circular waveguide transition structure can be differed so that waveguide bend structure is in asymmetric
Distribution, according to application system demand, adjusts and increases unilateral height, meet the application of particular system.
90 ° of bendings rectangular waveguide uses the broadside bending of the structure that E faces are turned, i.e. rectangular waveguide and long side is remained
One plane, to expand the area of turning inside and outside wall, reduces local field strength.
It is described 90 ° bending rectangular waveguide it is long in a and it is narrow while b meet：
P is maximum transmission power, and λ is working frequency.
Change curve when 90 ° of bendings rectangular waveguide is turned is 1/4 arc section.
The waveguide bend two ends are provided with concave-convex flange, convenient to be connected with transmission line system.
Further, the elbow is provided with cooling device.
The cooling device bends the cooling bath of rectangular waveguide turning structure outer wall and with water inlet including being arranged at 90 °
Constituted with the cover plate of delivery port.Cover plate is fixed on the outside of cooling bath, and current are flowed into from a cover plate wherein hole, another hole outflow.
The present invention is simple in construction, can use common copper material or aluminum profile extrusion.
When waveguide bend works, TE1,1Mould enters inside elbow from circle-rectangular waveguide transition structure, by 90 ° of moments of flexure theory
After shape waveguide turning structure, output is realized from rectangle-circular waveguide transition structure, the steering in beam propagation direction is completed.Specifically,
Compact elbow operation principle is as follows：The circular polarisation TE exported from gyrotron traveling wave tube1,1Mould ripple after circle-rectangular waveguide transition,
Cause the TE on the cross polarization direction of generation due to the difference of the longer wide-edge of rectangular waveguide1,0Mould and TE0,1Mould guided wave speed is deposited
In difference, so as to there is phase difference.And then after being turned by 90 ° of follow-up bending rectangular waveguides, phase difference further expands.
Output end, requires to carry out last adjustment to the phase of beamformer output using rectangle-circular waveguide changeover portion according to output.In design
When, change curve during by adjusting the length and width size of rectangular waveguide, radius of turn, turning can just adjust two quadrature components
Phase shift difference, the phase-shift phase on control cross polarization direction, so as to realize the output of particular polarization mode.Turn compared to circular waveguide
Pattern layout pitch is farther out for curved mode, in rectangular waveguide, it is not easy to encouraged spurious mode, it is ensured that defeated after turning
The purity of exit pattern.
Beneficial effects of the present invention are as follows：
(1) present invention using rectangular waveguide turning structure, by select waveguide sectional dimension, turn curve shape
And length, it becomes possible to the polarization mode of wave beam is controlled, the output of particular polarization mode is advantageously implemented, without extra circle
Polarizer, advantageously reduces the loss of high power transmission system, improves the densification degree of Transmission system.
(2) present invention is using the turning structure of rectangular waveguide, and microwave is with TE during turning1,0Mould and TE0,1The mode of mould is carried out
Transmission, is difficult to be converted to other patterns, is conducive to improving the efficiency of transmission of beamformer output and the purity of output mode.
(3) unsymmetric structure can be used in the present invention, reduced wave beam height on single direction when turning, met special
Determine systematic difference demand.
(4) present invention has the advantages that simple in construction, compactedness is good and is easy to Project Realization.
Brief description of the drawings
Fig. 1 is the external structure schematic diagram of the invention with cooling device.
Fig. 2 is internal water slot structure schematic diagram of the present invention.
Fig. 3 is internal cavity structure (sectional view) of the invention.
Fig. 4 is the TE of case study on implementation one of the present invention1,1The transmission amplitude curve of two polarised directions of pattern.
Fig. 5 is the TE of case study on implementation one of the present invention1,1The difference curve of two polarised directions of pattern.
Fig. 6 is the TE of case study on implementation two of the present invention1,1The transmission amplitude curve of two polarised directions of pattern.
Fig. 7 is the TE of case study on implementation two of the present invention1,1The difference curve of two polarised directions of pattern.
Drawing reference numeral explanation：
In Fig. 1：1. First Transition section, 2 second changeover portions, 3.90 ° of bending rectangular waveguide turning structures, 4. cooling cover plates,
A. cooling device water inlet, b. cooling device delivery ports.
In Fig. 2：6. rectangular waveguide turning structure cooling tank structure.
In Fig. 3：7. concave-convex flange, a. pins.
Specific practical ways
The present invention will be further described with reference to the accompanying drawings and examples, but embodiments of the present invention and requirement
The scope of protection is not limited thereto.
A kind of the high-power of compact crosses mould microwave elbow, and structure by outer wall as shown in figure 1, be provided with 90 ° of cooling bath
Bend the transition structure composition of rectangle waveguide cover, the cover plate with input and output waterpipe jointing and two sections of rectangle-circular waveguides, three
Segment structure internal cavity junction is seamlessly transitted, and two transition structures are fixedly connected on curved waveguide two by concave-convex flange respectively
End.
The cross section of this 90 ° bending rectangular waveguides is rectangle, and waveguide is according to the smooth continuous axis bending in center.In this reality
Apply in example, we illustrate by taking constant curvature axis of bending as an example for the part, the part can equally use a variety of different changes
Curvature axis is realized.
Specifically, the present invention is when by arrangement works as shown in Figure 3, TE1,1Mould energy is from flange feed-in, into circle-square
After shape waveguide transition, the TE of polarization degeneracy is converted into0,1Mould and TE1,0Mould.Due to the difference of the rectangular waveguide length of side so that TE0,1
Mould and TE1,0The propagation constant of mould is unequal, so as to phase difference occur；Into 90 ° of bending rectangular waveguides, further expand phase
Difference；TE0,1Mould and TE1,0Mould enters after rectangle-circular waveguide transition, and the phase difference of generation is suitably adjusted, and realizes specific
The wave beam output of polarized state.Consider that the outer wall field distribution of 90 ° of bending rectangular waveguides when wave beam is being turned is concentrated, therefore in ripple
Lead outer wall and be carved with tank, with constituting cooling system with input and output water pipe cover plate.Outside overall structure such as Fig. 1 institutes of the invention
Show, cooling water enters from water inlet a ports, absorb the heat produced by elbow, then flowed out from delivery port b ports.
It shown below is specific embodiment one, the simulation architecture parameter of embodiment two and simulation result：
In embodiment one, input wave beam is TE1,1Mould circularly polarised wave, input circular waveguide bore is 32mm, and working frequency range is
13GHz~16GHz, beamformer output remains as circularly polarised wave.In the present embodiment, the physical dimension inside elbow is：First Transition
Section A length is 38mm, and the sectional dimension of 90 ° of bending rectangular waveguides is 24.5mm*19.2mm, and radius of curvature during turning is
52mm, the second changeover portion B length is 60mm.
The present embodiment TE1,1The amplitude of elbow output mode is as shown in Figure 4 with frequency variation relation.Working frequency exists
In the range of 13.5GHz~15.5GHz, the amplitude in the cross polarization direction of output is more than 0.99, wherein, for horizontal polarization
Speech, at frequency 15.25GHz, output is up to maximum, and maximum output amplitude can be 0.995；For vertical polarization,
At frequency 13.75GHz, output is up to maximum, and maximum output amplitude can be 0.9975.The present embodiment TE1,1Elbow output mode
Phase it is as shown in Figure 5 with frequency variation relation.Working frequency in the range of 13GHz~16GHz, two patterns of output it
Between maximum amplitude difference be less than 1 degree, both are almost completely the same.According to amplitude is equal, phase difference is zero degree a pair just
The combination of polarized wave is handed over to remain as line polarization wave, therefore the present embodiment result shows that the compact overmoded waveguide elbow scheme proposed is real
Line polarization wave output is showed.
In embodiment two, input wave beam is TE1,1Mould circularly polarised wave, input circular waveguide bore is 32mm, and working frequency range is
13GHz~16GHz, beamformer output is line polarization wave.In the present embodiment, the physical dimension inside elbow is：First Transition section A's
Length is 38mm, and the sectional dimension of 90 ° of bending rectangular waveguides is 30mm*19.2mm, and radius of curvature during turning is 52mm, second
Changeover portion B length is 70mm.
The present embodiment TE1,1The amplitude of elbow output mode is as shown in Figure 6 with frequency variation relation.Working frequency exists
In the range of 13.25GHz~15.5GHz, the amplitude in the cross polarization direction of output is more than 0.98, wherein, for horizontal polarization
Speech, at frequency 15.25GHz, output is up to maximum, and maximum output amplitude can be 0.999；For vertical polarization,
At frequency 14.12GHz, output is up to maximum, and maximum output amplitude can be 0.996.The present embodiment TE1,1Elbow output mode
Phase it is as shown in Figure 7 with frequency variation relation.Working frequency in the range of 13GHz~16GHz, two patterns of output it
Between difference in magnitude be 72 ° -97 °, wherein in 14.4GHz, phase difference is 90 °.According to amplitude is equal, phase difference is 90 ° one
To orthogonally polarized wave be combined as circularly polarised wave, therefore the present embodiment result shows the compact overmoded waveguide elbow scheme proposed
Realize circularly polarised wave output.
In summary, what the present invention was provided is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube：Pass through
Using the turning mode of rectangular waveguide, not only contribute to reduce the generation of spurious mode, improve the pure of turning efficiency and pattern
Degree, is additionally favorable for exporting the wave beam of particular polarization state；By controlling the height of circle-rectangular waveguide changeover portion, waveguide can be reduced
The unilateral height of elbow, meets the demand of application-specific system.Apply the invention to the output system of high-power gyrotron traveling wave tube
In system, in peak power 160kW input condition, system worked well.
Claims (10)
1. one kind is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, including 90 ° bending rectangular waveguides and
Two sections of rectangles-circular waveguide transition structure of its two ends connection, three-stage structure internal cavity junction is seamlessly transitted；
The two sections of rectangles-circular waveguide transition structure is the transition structure that radius fades to rectangle from circle vertically, by linear
Or nonlinear mode is realized, wherein being determined as the circular waveguide size of input by prime microwave input structure, output is used as
The circular waveguide size at end by follow-up microwave transmission device input port structures shape.
2. it is as claimed in claim 1 a kind of suitable for TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its feature
It is：90 ° of bendings rectangular waveguide uses the broadside bending of the structure that E faces are turned, i.e. rectangular waveguide and long side remains one
Individual plane.
3. it is as claimed in claim 2 a kind of suitable for TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its feature
It is：It is described 90 ° bending rectangular waveguide it is long in a and it is narrow while b meet：
P is maximum transmission power, and λ is working frequency.
4. it is as claimed in claim 1 a kind of suitable for TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its feature
It is：The length of the two sections of rectangles-circular waveguide transition structure is identical, and waveguide bend structure is symmetric；Or described two
The length of section rectangle-circular waveguide transition structure is differed, and waveguide bend structure is in asymmetric distribution, according to application system demand,
Adjust and increase unilateral height, meet the application of particular system.
5. one kind as described in claim 1,2 or 3 is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its
It is characterised by：Change curve when 90 ° of bendings rectangular waveguide is turned is 1/4 arc section.
6. one kind as described in claim 1,2 or 3 is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its
It is characterised by：The elbow is provided with cooling device.
7. it is as claimed in claim 6 a kind of suitable for TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its feature
It is：The cooling device include being arranged at the cooling bath of 90 ° of bending rectangular waveguide turning structure outer walls and with water inlet and
The cover plate composition of delivery port.Cover plate is fixed on the outside of cooling bath, and current are flowed into from a cover plate wherein hole, another hole outflow.
8. it is as claimed in claim 1 a kind of suitable for TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its feature
It is：The Elbow material is copper or aluminium.
9. it is as claimed in claim 1 a kind of suitable for TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its feature
It is：Three parts of the composition elbow are connected by concave-convex flange, and are furnished with shop bolt in flange connections, it is ensured that dress
With precision.
10. it is as claimed in claim 1 a kind of suitable for TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube, its feature
It is：The elbow two ends are provided with the concave-convex flange for being used for being connected with transmission line system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710281794.7A CN107039712A (en) | 2017-04-26 | 2017-04-26 | One kind is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710281794.7A CN107039712A (en) | 2017-04-26 | 2017-04-26 | One kind is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube |
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| CN107039712A true CN107039712A (en) | 2017-08-11 |
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|---|---|---|---|
| CN201710281794.7A Pending CN107039712A (en) | 2017-04-26 | 2017-04-26 | One kind is applied to TE1,1The compact overmoded waveguide elbow of mould gyrotron traveling wave tube |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516751A (en) * | 2017-08-30 | 2017-12-26 | 电子科技大学 | A kind of broadband high-power millimeter wave TE0,1 mould overmoded waveguide elbows |
| CN107634296A (en) * | 2017-09-01 | 2018-01-26 | 西北核技术研究所 | High-Power Microwave TE11Mould polarized rotation synthesizer and polarized rotation synthetic method |
| CN110707433A (en) * | 2019-10-24 | 2020-01-17 | 西南交通大学 | High-power-capacity slotted circular waveguide circular polarizer and machining method thereof |
| CN112909449A (en) * | 2019-11-19 | 2021-06-04 | 新奥科技发展有限公司 | Collimating elbow |
| CN113839219A (en) * | 2021-08-31 | 2021-12-24 | 电子科技大学 | Design method of broadband high-power circular polarizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040227597A1 (en) * | 2003-05-12 | 2004-11-18 | Chang Woo Jin | Waveguide interconnection apparatus |
| CN105932373A (en) * | 2016-05-25 | 2016-09-07 | 电子科技大学 | High-power overmode microwave elbow with controllable polarization |
-
2017
- 2017-04-26 CN CN201710281794.7A patent/CN107039712A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040227597A1 (en) * | 2003-05-12 | 2004-11-18 | Chang Woo Jin | Waveguide interconnection apparatus |
| CN105932373A (en) * | 2016-05-25 | 2016-09-07 | 电子科技大学 | High-power overmode microwave elbow with controllable polarization |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516751A (en) * | 2017-08-30 | 2017-12-26 | 电子科技大学 | A kind of broadband high-power millimeter wave TE0,1 mould overmoded waveguide elbows |
| CN107634296A (en) * | 2017-09-01 | 2018-01-26 | 西北核技术研究所 | High-Power Microwave TE11Mould polarized rotation synthesizer and polarized rotation synthetic method |
| CN107634296B (en) * | 2017-09-01 | 2019-12-06 | 西北核技术研究所 | High-power microwave TE11 modular polarization rotation synthesizer and polarization rotation synthesis method |
| CN110707433A (en) * | 2019-10-24 | 2020-01-17 | 西南交通大学 | High-power-capacity slotted circular waveguide circular polarizer and machining method thereof |
| CN110707433B (en) * | 2019-10-24 | 2020-07-17 | 西南交通大学 | High-power-capacity slotted circular waveguide circular polarizer and machining method thereof |
| CN112909449A (en) * | 2019-11-19 | 2021-06-04 | 新奥科技发展有限公司 | Collimating elbow |
| CN112909449B (en) * | 2019-11-19 | 2022-02-11 | 新奥科技发展有限公司 | Collimating elbow |
| CN113839219A (en) * | 2021-08-31 | 2021-12-24 | 电子科技大学 | Design method of broadband high-power circular polarizer |
| CN113839219B (en) * | 2021-08-31 | 2022-10-14 | 电子科技大学 | Design method of broadband high-power circular polarizer |
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Application publication date: 20170811 |
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