CN107134657A - A kind of confocal waveguide medium ceramic ring microwave absorbing device of period profile - Google Patents
A kind of confocal waveguide medium ceramic ring microwave absorbing device of period profile Download PDFInfo
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- CN107134657A CN107134657A CN201710255867.5A CN201710255867A CN107134657A CN 107134657 A CN107134657 A CN 107134657A CN 201710255867 A CN201710255867 A CN 201710255867A CN 107134657 A CN107134657 A CN 107134657A
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- ceramic ring
- confocal waveguide
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- minute surface
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
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Abstract
A kind of disclosure of the invention confocal waveguide medium ceramic ring microwave absorbing device of period profile, is related to microwave, millimeter wave and THz devices technical field.Present media ceramic ring and copper coin are in close contact along longitudinal period profile, copper coin with media ceramic ring, and keep certain gap with confocal waveguide minute surface, it is to avoid its microwave on confocal waveguide transmission produces influence.The microwave cut-off that copper coin of the present invention can go out diffraction, the microwave of diffraction only can be in respective media ceramic ring absorptive unit by multiple reflections and absorption, effectively prevent the energy crosstalk between the ceramic ring element of different medium, avoid simultaneously because the spurious mode not fully absorbed is reflected into high-frequency structure interacting system and high-frequency structure output end, the not pure and mild end reflection of output mode is caused, the job stability of confocal waveguide gyrotron traveling wave tube is improved.
Description
Technical field
The present invention relates to microwave, millimeter wave and THz devices technical field, specifically a kind of period profile is total to
Burnt waveguide medium ceramic ring microwave absorbing device, can apply the confocal waveguide gyro amplifier in millimeter wave, terahertz wave band
Part and confocal waveguide cyclotron oscillation device.
Background technology
Gyrotron with outstanding features such as its therefore high pulse power, high-average power, broadbands, as most development potentiality and
One of the millimeter wave of application prospect-terahertz emission source device, in High power radar, communication, material process, electronic countermeasure and height
The fields such as energy particle acceleration have a wide range of applications.Confocal waveguiding structure is a kind of new interaction knot proposed by america's MIT
Structure, its primary structure includes two panels cylindrical mirror symmetrical above and below, waveguide sideways open, therefore has and spread out on the both sides of confocal waveguide
Loss is penetrated, and it is this because the decay that diffraction loss is caused is different for different patterns, i.e., and confocal waveguide has pattern
Select characteristic, this characteristic of confocal waveguide just can for suppressing competitive mode, efficiently solve traditional Cyclotron by
The difficulty that phenomenon is difficult to be operated in W-waveband and Terahertz frequency range is spent together in size.
Because confocal waveguide is open Wave guide system, microwave can be outside along the gap between two minute surfaces in transmitting procedure
Radiation, in order to which the energy for preventing confocal waveguide diffraction from going out is reflected back into interacting formations, influences the job stability of homogeneous tube, grinds
Study carefully can effectively absorb radiation microwave device be necessary.At present, the only america's MIT reported both at home and abroad and domestic Chinese engineering
Physical study institute has carried out experimental study to confocal waveguide gyrotron traveling wave tube.Wherein China Engineering Physics Research Institute is developing
During the confocal waveguide gyrotron traveling wave tubes of 140GHz, using on outer sleeve lining Coated With Absorbing Material coating it is micro- come absorb that diffraction goes out
Ripple, due to reasons such as the stabilities of pipe, not stable amplified signal output in experiment, and america's MIT is in open text
Used microwave absorbing device is not referred in offering.
The content of the invention
For early stage, when developing confocal waveguide gyrotron traveling wave tube, result of the test is not good both at home and abroad, pipe stability deficiency etc.
Situation.The present invention is from the stability for lifting confocal waveguide, it is proposed that a kind of media ceramic ring and copper coin period profile are total to
Burnt waveguide Eccentric Dielectric ceramic ring microwave absorbing device, wherein media ceramic ring and the longitudinally spaced period profile of copper coin, cycle
Whole media ceramic ring is divided into microwave absorption unit small one by one by the copper coin of distribution, is given off from open confocal waveguide
Microwave be constrained on each absorptive unit, multiple roundtrip is finally completely absorbed, and effectively prevent give off micro-
Ripple is reflected back in interacting system by media ceramic ring, it is ensured that homogeneous tube being capable of steady operation.
The technical scheme is that a kind of confocal waveguide medium ceramic ring microwave absorbing device of period profile, the device
Including：Confocal waveguide, multiple media ceramic rings, multiple copper coins；It is characterized in that the device is symmetrical above and below also symmetrical, institute
Confocal waveguide is stated to be divided between the confocal waveguide minute surface of upper and lower two panels, upper and lower confocal waveguide minute surface provided with gap；Wherein each medium
Ceramic ring is Eccentric Dielectric ceramic ring and side wall offers gap, the width of the media ceramic circumferential weld gap and upper and lower confocal waveguide
Distance of the minute surface extension at gap is identical (such as Fig. 3)；Each copper coin is the circular copper plate with linear incision；The multiple medium pottery
Ceramic ring is arranged in order the left and right sides for being arranged at upper and lower confocal waveguide minute surface, and the gap of media ceramic ring and upper and lower confocal ripple
Lead the gap of minute surface relatively and connect；Copper coin, the linear incision of copper coin and upper and lower confocal ripple are set between adjacent media ceramic ring
Lead the gap of minute surface relatively but do not contact.
Present media ceramic ring and copper coin are along longitudinal period profile, and copper coin is in close contact with media ceramic ring, and together
Burnt waveguide minute surface keeps certain gap, it is to avoid its microwave on confocal waveguide transmission produces influence.Copper of the present invention
Microwave that plate can go out diffraction cut-off, the microwave of diffraction only can in respective media ceramic ring absorptive unit by multiple reflections and
Absorb, the energy crosstalk between the ceramic ring element of different medium is effectively prevented, while avoiding the parasitism due to not fully absorbing
Mode reflection enters high-frequency structure interacting system and high-frequency structure output end, causes the not pure and mild end reflection of output mode,
Improve the job stability of confocal waveguide gyrotron traveling wave tube.
Advantages of the present invention：1. compared with uniform dielectric ceramic ring, period profile media ceramic ring is opened in confocal waveguide
The microwave given off is constrained on each absorptive unit, repeatedly absorbs, effectively prevent prevents energy crosstalk, it also avoid spoke
The microwave of injection is reflected back in interacting system by media ceramic ring, it is ensured that homogeneous tube being capable of steady operation.2. periodic ceramic ring knot
Structure avoids the problems such as consistent ceramic ring is due to the oversized high processing costs caused, processing and difficult assembling, each medium pottery
Ceramic ring and copper coin can be processed respectively, and processing and assembling are quite convenient to, with very high engineering application value.
Brief description of the drawings
Fig. 1 is the confocal waveguide medium ceramic ring microwave absorbing device tomograph of period profile that the present invention is provided.
Fig. 2 is the confocal waveguide medium ceramic ring microwave absorbing device sectional view of period profile that the present invention is provided.
Fig. 3 is the horizontal stroke for the confocal waveguide medium ceramic ring microwave absorbing device media ceramic ring of period profile that the present invention is provided
Cross section structure figure.
Fig. 4 is the cross section knot for the confocal waveguide medium ceramic ring microwave absorbing device copper coin of period profile that the present invention is provided
Composition.
Drawing reference numeral explanation：1 is confocal waveguide minute surface；2 be media ceramic ring；3 be copper coin.
Embodiment：
Below in conjunction with the confocal waveguide gyrotron traveling wave tube high frequency interacting system design example of W-waveband and accompanying drawing to the present invention
It is described in further detail：
When electromagnetic wave is transmitted in confocal waveguide along while laterally outward radiation also can along propagating longitudinally forward,
Thus radiation field and waveguide core axle can shape in an angle, microwave along also having diffraction in the horizontal while longitudinal propagation.
Therefore, design the period profile Eccentric Dielectric ceramic ring absorption plant that is separated by copper coin, by the electromagnetic wave of diffraction every
It is disconnected, prevent the energy crosstalk of diffraction microwave.
Fig. 1 is the confocal waveguide medium ceramic ring microwave absorbing device tomograph of period profile, in high frequency interaction knot
The both sides of structure connect the media ceramic ring (2) of period profile, and the electromagnetic wave multiple reflections that can go out to diffraction absorb, media ceramic
Separated between ring with copper coin (3), on the one hand avoid the Electromagnetic Wave Propagation not fully absorbed to next section media ceramic ring or even enter
Enter high-frequency structure interaction region and high-frequency structure output end, cause energy crosstalk, influence the purity of output mode, it is on the other hand anti-
Only end reflection causes self-oscillation, improves travelling-wave tubes job stability.The design size of media ceramic ring and copper coin be by
What the field distribution of confocal waveguide interacting formations was determined, using absorption maximum diffraction microwave as standard, optimized by CST software emulations
Obtain.
Wherein：
The minute surface radius of confocal waveguide (1) is 7mm, and transverse width is that ultimate range is 7mm between 6mm, minute surface；Media ceramic
Ring element (2) inside radius 6.7mm, inside radius arc angle is 299.92 degree, and ceramic ring thickness is 1.4mm, and longitudinal length is
12mm；Copper coin (3) radius is 8.1mm, and thickness is 2mm, apart from confocal waveguide minute surface 1mm.Fig. 3,4 sets forth media ceramic
The shape of cross section of ring and copper coin.
Fig. 2 is the confocal waveguide medium ceramic ring microwave absorbing device sectional view of period profile.Fig. 3 is the week that the present invention is provided
Phase is distributed the cross-sectional structure figure of confocal waveguide medium ceramic ring microwave absorbing device media ceramic ring, in each media ceramic ring
In absorbing cavity, the microwave of diffraction can be by arc media ceramic ring multiple reflections and absorption, it is to avoid microwave secondary counter is emitted back towards into height
Frequency interacting system, it also avoid the hot-spot of absorption plant, and the radiating of high frequency interacting system is solved to a certain extent.
The schematic diagram of microwave reflection is given in figure, only few energy can be reflected back interaction region, and due to media ceramic ring
Using cambered design, there is bigger absorption area, improve travelling-wave tubes mean power capacity and stability.Fig. 4 is that the present invention is carried
The cross-sectional structure figure of the confocal waveguide medium ceramic ring microwave absorbing device copper coin of period profile of confession, copper coin has one with minute surface
Fixed gap, it is to avoid its microwave on confocal waveguide transmission produces influence.
Above example only this new invention for convenience of description, the confocal waveguide medium pottery of period profile that this new invention is proposed
Ceramic ring microwave absorbing device can be returned using different frequency, the confocal waveguide gyro amplifier for working in arbitrary patterns and confocal waveguide
Revolve oscillating device.By changing material, size and the media ceramic ring of media ceramic ring and longitudinal arrangement mode of copper coin etc.
Belong to the category that the present invention is protected.
Claims (2)
1. a kind of confocal waveguide medium ceramic ring microwave absorbing device of period profile, the device includes：Confocal waveguide, Duo Gejie
Matter ceramic ring, multiple copper coins；It is characterized in that the device is symmetrical above and below also symmetrical, the confocal waveguide is divided into upper and lower
Gap is provided between the confocal waveguide minute surface of two panels, upper and lower confocal waveguide minute surface；Wherein each media ceramic ring is Eccentric Dielectric ceramics
Ring and side wall offers gap, the width of the media ceramic circumferential weld gap and upper and lower confocal waveguide minute surface extension at gap away from
From identical；Each copper coin is the circular copper plate with linear incision；The multiple media ceramic ring be arranged in order be arranged at it is upper and lower confocal
The left and right sides of waveguide minute surface, and the gap of media ceramic ring is relative with the gap of upper and lower confocal waveguide minute surface and connects；It is adjacent
Copper coin is set between media ceramic ring, and the linear incision of copper coin is relative with the gap of upper and lower confocal waveguide minute surface but does not contact.
2. a kind of confocal waveguide medium ceramic ring microwave absorbing device of period profile as claimed in claim 1, its feature exists
It is 7mm in the confocal waveguide minute surface radius, transverse width is that ultimate range is 7mm between 6mm, minute surface；Half in media ceramic ring
Footpath 6.7mm, inside radius arc angle is 299.92 degree, and ceramic ring thickness is 1.4mm, and longitudinal length is 12mm；Copper coin radius is
8.1mm, thickness is 2mm, apart from confocal waveguide minute surface 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710255867.5A CN107134657B (en) | 2017-04-18 | 2017-04-18 | Microwave absorbing device for periodically distributed confocal waveguide dielectric ceramic rings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710255867.5A CN107134657B (en) | 2017-04-18 | 2017-04-18 | Microwave absorbing device for periodically distributed confocal waveguide dielectric ceramic rings |
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| CN107134657B CN107134657B (en) | 2020-01-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044398A (en) * | 2009-10-21 | 2011-05-04 | 中国科学院电子学研究所 | Distributed amplification gyro traveling wave tube amplifier |
| CN204168707U (en) * | 2014-11-07 | 2015-02-18 | 青岛卓英社科技有限公司 | Self-adhesive high-thermal-conductivity absorbing material |
| CN105914117A (en) * | 2016-04-20 | 2016-08-31 | 电子科技大学 | Confocal waveguide broadband input coupling device |
-
2017
- 2017-04-18 CN CN201710255867.5A patent/CN107134657B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044398A (en) * | 2009-10-21 | 2011-05-04 | 中国科学院电子学研究所 | Distributed amplification gyro traveling wave tube amplifier |
| CN204168707U (en) * | 2014-11-07 | 2015-02-18 | 青岛卓英社科技有限公司 | Self-adhesive high-thermal-conductivity absorbing material |
| CN105914117A (en) * | 2016-04-20 | 2016-08-31 | 电子科技大学 | Confocal waveguide broadband input coupling device |
Non-Patent Citations (1)
| Title |
|---|
| 梁田等: "耦合腔行波管用Mg_2SiO_4_SiC型陶瓷介质衰减材料", 《中国电子学会真空电子学分会第十九届学术年会》 * |
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