CN108682607A - A kind of U-shaped micro-strip slow-wave structure of corrugated casing - Google Patents
A kind of U-shaped micro-strip slow-wave structure of corrugated casing Download PDFInfo
- Publication number
- CN108682607A CN108682607A CN201810414310.6A CN201810414310A CN108682607A CN 108682607 A CN108682607 A CN 108682607A CN 201810414310 A CN201810414310 A CN 201810414310A CN 108682607 A CN108682607 A CN 108682607A
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- Prior art keywords
- wave
- metal
- slow
- medium substrate
- semi arch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/24—Slow-wave structures, e.g. delay systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/12—Vessels; Containers
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a kind of U-shaped micro-strip slow-wave structures of corrugated casing, on the basis of existing U-shaped micro-strip slow-wave structure, corrugated is revised as in two sides parallel with note wave interaction direction on medium substrate, ripple unit is semi arch, its radius is more than the radius of semi arch metal wire in U-shaped metal slow wave line, the center of circle of each ripple unit is overlapped with the center of circle of a semi arch metal wire respectively, metal shell is improved simultaneously, keep projection of the side that medium substrate is clamped in the inner cavity of metal shell on medium substrate direction identical as the ripple of medium substrate side.The present invention can effectively increase the bandwidth of U-shaped micro-strip slow-wave structure.
Description
Technical field
The invention belongs to ribbon beam traveling wave tube slow-wave system technical fields, more specifically, are related to a kind of corrugated casing U
Type micro-strip slow-wave structure.
Background technology
Travelling-wave tubes has very extensive application field as a kind of microwave power device, for different application modes,
Travelling-wave tubes has the characteristics that different, and usually, the advantages of travelling-wave tubes has, bandwidth, power is big, high gain, efficient, gain
Big and long lifespan etc., but in most cases, a travelling-wave tubes cannot have the advantages that all simultaneously, but respectively have
The chief has the advantages that different travelling-wave tubes is applied to different fields.
Slow-wave structure is to realize the interaction for reinforcing moving electron and electromagnetic field in travelling-wave type electronic device, make
The energy of electron stream is more effectively converted into the device of the high-frequency energy of electromagnetic wave.Core of the slow-wave structure as travelling-wave tubes
Point, quality directly decides the quality of travelling-wave tubes technical merit.
Micro-strip slow-wave structure is a kind of two-dimensional planar structure, is by medium substrate and to be placed in having on medium substrate
The microstrip line of some cycles arranges.For existing micro-strip slow-wave structure, poor, narrow bandwidth etc. that there are transmission characteristics lacks
Point needs to carry out further technological improvement.
Invention content
It is right it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of U-shaped micro-strip slow-wave structure of corrugated casing
The shape of medium substrate and metal shell is improved, and effectively increases the bandwidth of U-shaped micro-strip slow-wave structure.
For achieving the above object, the U-shaped micro-strip slow-wave structure of corrugated casing of the present invention, including U-shaped metal slow wave line, Jie
Matter substrate and metal shell, wherein U-shaped metal slow wave line is fixed on medium substrate, metal shell is used for clamping medium substrate,
U-shaped metal slow wave line is set to be suspended in intracavitary in metal shell, the U-shaped metal slow wave line is periodic structure, and each period includes 3
Root perpendicular to note wave interaction direction straightway metal wire and be cross-linked 2 semi arches of above-mentioned 3 straightway metal wires
Metal wire remembers that length of each period on note wave interaction direction is p, then the distance between adjacent two straightway metal wires
Radius for p/2, semi arch metal wire is p/4, and the center of circle of semi arch metal wire and two straightway metal wires being connect are same
The midpoint of side point overlaps；
Two sides parallel with note wave interaction direction are corrugated on medium substrate, and ripple unit is that radius is P
The center of circle of semi arch, wherein P ＞ p/4, each ripple unit is overlapped with the center of circle of a semi arch metal wire respectively；
In the inner cavity of metal shell, the projection and medium of side that medium substrate is clamped on medium substrate direction
The ripple of substrate side is identical.
The U-shaped micro-strip slow-wave structure of corrugated casing of the present invention, on the basis of existing U-shaped micro-strip slow-wave structure, by medium base
Corrugated is revised as in two sides parallel with note wave interaction direction on plate, and ripple unit is semi arch, and radius is more than U-shaped
The radius of semi arch metal wire in metal slow wave line, the center of circle of each ripple unit center of circle with a semi arch metal wire respectively
It overlaps, while metal shell is improved, make the side that medium substrate is clamped in the inner cavity of metal shell in medium
Projection on orientation substrate is identical as the ripple of medium substrate side.The present invention can effectively increase U-shaped micro-strip slow-wave structure
Bandwidth.
Description of the drawings
Fig. 1 is the specific implementation mode structure chart of the U-shaped micro-strip slow-wave structure of corrugated casing of the present invention；
Fig. 2 is the internal structure chart of the U-shaped micro-strip slow-wave structure of corrugated casing shown in Fig. 1；
Fig. 3 is the vertical view of U-shaped metal slow wave line and medium substrate in the present invention；
Fig. 4 is the transmission characteristic simulation result of the present embodiment；
Fig. 5 is the normalization phase velocity simulation result of the present embodiment.
Specific implementation mode
The specific implementation mode of the present invention is described below in conjunction with the accompanying drawings, preferably so as to those skilled in the art
Understand the present invention.Requiring particular attention is that in the following description, when known function and the detailed description of design perhaps
When can desalinate the main contents of the present invention, these descriptions will be ignored herein.
Embodiment
Fig. 1 is the specific implementation mode structure chart of the U-shaped micro-strip slow-wave structure of corrugated casing of the present invention.In order to show outside ripple
The internal structure of the U-shaped micro-strip slow-wave structure of shell, the metal shell in Fig. 1 conceal head cover.Fig. 2 is that corrugated casing shown in Fig. 1 is U-shaped
The internal structure chart of micro-strip slow-wave structure.In order to more clearly demonstrate the internal structure of the U-shaped micro-strip slow-wave structure of corrugated casing, scheme
Metal shell is concealed in 2.As depicted in figs. 1 and 2, similar with conventional U-shaped micro-strip slow-wave structure, corrugated casing U of the present invention
Type micro-strip slow-wave structure includes U-shaped metal slow wave line 1, medium substrate 2 and metal shell 3, wherein U-shaped metal slow wave line 1 is fixed
On medium substrate 2, metal shell 3 is used for clamping medium substrate 2, and U-shaped metal slow wave line 1 is made to be suspended in 3 inner cavity of metal shell
It is interior.In U-shaped micro-strip slow-wave structure, electron impact mouth 5, the signal that can add upper gun 4 in suitable position as needed are defeated
Entrance 6 and signal output 7.
Fig. 3 is the vertical view of U-shaped metal slow wave line and medium substrate in the present invention.As shown in figure 3, U-shaped metal slow wave line 1
For periodic structure, each period includes 3 perpendicular to the straightway metal wire in note wave interaction direction and is cross-linked above-mentioned 3
2 semi arch metal wires of straightway metal wire remember that length of each period on note wave interaction direction is p, then adjacent two
The distance between root straightway metal wire is p/2, and the radius of semi arch metal wire is p/4, the center of circle of semi arch metal wire and institute
The midpoint of two straightway metal wire homonymy endpoints of connection overlaps.In planar metal slow wave line each period included 3
In straightway metal wire, it is assumed that the length of second intermediate straightway metal wire is L, then first straightway metal wire and
The sum of length of second straightway metal wire is L.Similar with general statement, the size described in present specification does not consider respectively
The thickness of component, i.e., the beginning and end of the described size are the midpoint in component thickness direction.
The shape of medium substrate 2 and metal shell 3 is improved in the present invention, as shown in figure 3, medium substrate 2
Upper two sides parallel with note wave interaction direction are corrugated, and ripple unit is the semi arch that radius is P, wherein P ＞ p/
4, i.e. the radius of ripple unit semi arch is more than the radius of semi arch metal wire in U-shaped metal slow wave line, each ripple unit
The center of circle is overlapped with the center of circle of a semi arch metal wire respectively, i.e., medium substrate 2 is slightly wider than U-shaped metal slow wave line, side shape
Shape can be considered as the similar fitgures of U-shaped metal slow wave line outline.The radius P of ripple unit can be set as needed
It sets, P=p/2 is preferably arranged in the present embodiment.
In order to adapt to the improved shape of medium substrate 2, the side that medium substrate is clamped in the inner cavity of metal shell 3
Face, the projection on 2 direction of medium substrate are identical as the ripple of 2 side of medium substrate.The plane with medium substrate can be considered as
Structure is bottom, carries out stretched vertically and is formed by the shape that shape is 3 inner cavity of metal shell.
The present invention can improve the continuity of slow-wave structure by the improvement to medium substrate and metal shell, to change
Field distribution in kind slow-wave structure, reduces the discontinuity in slow-wave structure, while reducing the reactive component in slow-wave structure,
Realize has better transmission characteristic and dispersion characteristics than conventional microstrip type slow-wave structure, substantially increases microstrip type slow wave
The bandwidth of structure.The structure that the present invention improves can make the electromagnetic transmission situation more adjunction in cyclic slow wave structure
The electromagnetic transmission situation being bordering in uniform shielding microstrip line, and the transmission mode of the electromagnetic wave in uniform shielding microstrip line is
QTEM patterns, dispersion is extremely weak, and phase velocity changes with frequency slowly, so that synchronizing electricity corresponding to cyclic slow wave structure
Pressure changes slowly with frequency, i.e., under the same operating voltage, has the electromagnetism wave energy of bigger frequency range to reach with electronics synchronous
Condition.In conjunction with above 2 points it is found that the present invention has broader bandwidth relative to traditional U-shaped micro-strip slow-wave structure.
Technique effect in order to better illustrate the present invention carries out simulating, verifying to the present invention.Fig. 4 is the biography of the present embodiment
Defeated characteristic Simulation result.S11 is input reflection coefficient, that is, input return loss in Fig. 4, and S21 is positive transmission coefficient,
It is exactly gain.As shown in figure 4, within the scope of 0 to 50GHz, the reflectance factor of the present embodiment is less than -20dB, and 24GHz models are arrived 0
- 30dB is even less than in enclosing, it is seen that the present invention has good transmission characteristic in sizable bandwidth.
Fig. 5 is the normalization phase velocity simulation result of the present embodiment.Normalization phase velocity is used to embody the color of slow-wave structure
Dissipate characteristic.As shown in figure 5, within the scope of 0 to 80GHz, the synchronizing voltage variation range very little of the present embodiment, being combined with Fig. 4 can
To illustrate that the present invention has large bandwidth.
Although the illustrative specific implementation mode of the present invention is described above, in order to the technology of the art
Personnel understand the present invention, it should be apparent that the present invention is not limited to the range of specific implementation mode, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the spirit and scope of the present invention in, these
Variation is it will be apparent that all utilize the innovation and creation of present inventive concept in the row of protection.
Claims (2)
1. a kind of U-shaped micro-strip slow-wave structure of corrugated casing, including U-shaped metal slow wave line, medium substrate and metal shell, wherein U
Type metal slow wave line is fixed on medium substrate, and metal shell is used for clamping medium substrate, and U-shaped metal slow wave line is made to be suspended in gold
Belong in shell inner cavity, the U-shaped metal slow wave line is periodic structure, and each period includes 3 perpendicular to note wave interaction direction
Straightway metal wire and be cross-linked 2 semi arch metal wires of above-mentioned 3 straightway metal wires, remember each period in note wave
Length on interaction direction is p, then the distance between adjacent two straightway metal wires are p/2, the half of semi arch metal wire
Diameter is p/4, and the center of circle of semi arch metal wire is overlapped with the midpoint for two straightway metal wire homonymy endpoints being connect；Its feature
It is：
Two sides parallel with note wave interaction direction are corrugated on the medium substrate, and ripple unit is that radius is P
The center of circle of semi arch, wherein P ＞ p/4, each ripple unit is overlapped with the center of circle of a semi arch metal wire respectively；
In the inner cavity of the metal shell, the projection and medium of side that medium substrate is clamped on medium substrate direction
The ripple of substrate side is identical.
2. the U-shaped micro-strip slow-wave structure of ripple according to claim 1, which is characterized in that the medium substrate ripple unit
Radius P=p/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414310.6A CN108682607B (en) | 2018-05-03 | 2018-05-03 | A kind of U-shaped micro-strip slow-wave structure of corrugated casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414310.6A CN108682607B (en) | 2018-05-03 | 2018-05-03 | A kind of U-shaped micro-strip slow-wave structure of corrugated casing |
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| Publication Number | Publication Date |
|---|---|
| CN108682607A true CN108682607A (en) | 2018-10-19 |
| CN108682607B CN108682607B (en) | 2019-11-19 |
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| CN201810414310.6A Expired - Fee Related CN108682607B (en) | 2018-05-03 | 2018-05-03 | A kind of U-shaped micro-strip slow-wave structure of corrugated casing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114530359A (en) * | 2022-02-22 | 2022-05-24 | 电子科技大学 | Coaxial multichannel suspended microstrip line slow-wave structure traveling wave tube |
| CN115942523A (en) * | 2023-01-18 | 2023-04-07 | 中国科学院合肥物质科学研究院 | High-voltage-resistant thin-wall composite insulating heater for current lead of superconducting magnet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807355A (en) * | 1986-04-03 | 1989-02-28 | Raytheon Company | Method of manufacture of coupled-cavity waveguide structure for traveling wave tubes |
| US8330372B2 (en) * | 2010-05-21 | 2012-12-11 | Ut-Battelle, Llc | Slow wave structures using twisted waveguides for charged particle applications |
| CN105428189A (en) * | 2016-01-04 | 2016-03-23 | 电子科技大学 | Slow wave structure of coplanar waveguide |
| CN106098508A (en) * | 2016-06-29 | 2016-11-09 | 北京应用物理与计算数学研究所 | A kind of slow-wave structure of Terahertz micro-electrovacuum folded waveguide travelling-wave tube amplifier |
| WO2017104680A1 (en) * | 2015-12-18 | 2017-06-22 | Ｎｅｃネットワーク・センサ株式会社 | Slow wave circuit and traveling wave tube |
-
2018
- 2018-05-03 CN CN201810414310.6A patent/CN108682607B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807355A (en) * | 1986-04-03 | 1989-02-28 | Raytheon Company | Method of manufacture of coupled-cavity waveguide structure for traveling wave tubes |
| US8330372B2 (en) * | 2010-05-21 | 2012-12-11 | Ut-Battelle, Llc | Slow wave structures using twisted waveguides for charged particle applications |
| WO2017104680A1 (en) * | 2015-12-18 | 2017-06-22 | Ｎｅｃネットワーク・センサ株式会社 | Slow wave circuit and traveling wave tube |
| CN105428189A (en) * | 2016-01-04 | 2016-03-23 | 电子科技大学 | Slow wave structure of coplanar waveguide |
| CN106098508A (en) * | 2016-06-29 | 2016-11-09 | 北京应用物理与计算数学研究所 | A kind of slow-wave structure of Terahertz micro-electrovacuum folded waveguide travelling-wave tube amplifier |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114530359A (en) * | 2022-02-22 | 2022-05-24 | 电子科技大学 | Coaxial multichannel suspended microstrip line slow-wave structure traveling wave tube |
| CN114530359B (en) * | 2022-02-22 | 2023-04-18 | 电子科技大学 | Coaxial multichannel suspended microstrip line slow-wave structure traveling wave tube |
| CN115942523A (en) * | 2023-01-18 | 2023-04-07 | 中国科学院合肥物质科学研究院 | High-voltage-resistant thin-wall composite insulating heater for current lead of superconducting magnet |
| CN115942523B (en) * | 2023-01-18 | 2023-12-19 | 中国科学院合肥物质科学研究院 | High-voltage-resistant thin-wall composite insulating heater for superconducting magnet current lead |
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| CN108682607B (en) | 2019-11-19 |
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Granted publication date: 20191119 |