CN109559959A - It is a kind of to successively decrease the folded waveguide slow-wave structure of electron beam channel with internal diameter - Google Patents
It is a kind of to successively decrease the folded waveguide slow-wave structure of electron beam channel with internal diameter Download PDFInfo
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- CN109559959A CN109559959A CN201710884536.8A CN201710884536A CN109559959A CN 109559959 A CN109559959 A CN 109559959A CN 201710884536 A CN201710884536 A CN 201710884536A CN 109559959 A CN109559959 A CN 109559959A
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- electron beam
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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
- H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
- H01J23/38—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the discharge
Abstract
It is a kind of to successively decrease the folded waveguide slow-wave structure of electron beam channel with internal diameter, belong to microwave vacuum field of electronic devices, becomes from traditional uniform cylindrical the cone of internal diameter gradual change along the electron beam channel of slow-wave structure axis；Electron beam channel cross sectional dimensions gradually successively decreases along longitudinal direction, forms electromagnetic field intensity in interaction region and gradually increases along longitudinal direction；The orientation optimization for electron beam channel of successively decreasing is realized by analog selection, adjustment radial dimension, to realize, electronics note more fully gives energy to electromagnetic field in channel, it improves interaction impedance and electronics note moves closer to the high electric area at electron beam channel edge, device output power performance is improved.
Description
Technical field
The invention belongs to microwave vacuum field of electronic devices, and in particular to a kind of folding with decreasing dimensions electron beam channel
Waveguide slow-wave structure.
Background technique
In short millimeter band (40GHz-300GHz) and Terahertz frequency domain (300GHz-3000GHz), linear note vacuum electronic is utilized
Device can produce high-power and miniaturization Terahertz vacuum radiation source, such as backward wave oscillator, extension interaction device and row
Wave device etc..With the raising of working frequency, the characteristic size of used slow-wave structure is gradually reduced.Thus, in order to obtain height
Power output, generate and maintain in high current density electric current, high-precision processing technology and it is high to it is middle require etc. in technical problems by
To limitation.In the state of the art, electronics note is intercepted and captured by more serious intercepting and capturing phenomenon can occur when slow-wave structure
Caused by low flow rate can reduce the Key Performance Indicators such as power and the efficiency of device.It is allowed although can be taken in actually developing
Electronics note concentrates on the method for electron beam channel central area to improve flow rate, but due to far from electron beam channel boundary part
Can significantly reduce coupled impedance, this design method will limit device output power.
In untapped new type slow wave structure, the reduction electromagnetic wave phase speed in addition to completing traditional slow-wave structure is allowed to
Outside the effect synchronous with electronics holding, firstly, researched and developed decreasing dimensions electron beam channel is utilized constantly to enhance interaction along longitudinal direction
With longitudinal electromagnetic field in area, secondly, channel edge high electric area is passed through in the path that electronics note is advanced, enhancing electronics note and electromagnetic wave it
Between energy exchange complete the even whole transducings of collection part finally, the feature strong using All metal slow wave structure heat-sinking capability
The function of electronics afterwards, since electronics has given the energy to electromagnetic wave, power is no longer directly related with flow rate at this time.For
The demand that short millimeter wave and terahertz emission source increase power and improve efficiency, passes through novel decreasing dimensions electron beam channel knot
Structure, making electronics note, each layer of electronics note is all constantly close to high electric area locating for electron beam channel boundary when advancing, to obtain
Lasting, more effective Beam and wave interaction is obtained, the method for changing electron beam channel decreasing dimensions degree can be passed through, improve electricity
The energy that son is surrendered, the application have developed this folded waveguide slow-wave structure with innovative electronic note structure.
Summary of the invention
The technical problem to be solved by the present invention is to when device operating frequencies are gradually increased, the size of used slow-wave structure will
It is gradually reduced, this will reduce electronics beam passband and output power in electron tube.In order to overcome these difficulties, it is necessary to
A kind of novel folded waveguide slow-wave structure with decreasing dimensions electron beam channel is researched and developed in innovation, to substitute traditional slow wave knot
The cylindricality electron beam channel of structure.
The object of the present invention is to provide a kind of folded waveguide slow-wave structures with decreasing dimensions electron beam channel, for reality
Existing the object of the invention, used technical solution is:
It is a kind of to successively decrease the folded waveguide slow-wave structure of electron beam channel with internal diameter, which is characterized in that along slow-wave structure axis
The electron beam channel of line is become the cone of internal diameter gradual change from traditional uniform cylindrical；Electron beam channel cross sectional dimensions
Gradually successively decrease along longitudinal direction, forms electromagnetic field intensity in interaction region and gradually increase along longitudinal direction；Pass through analog selection, adjustment radial ruler
The very little orientation optimization for realizing electron beam channel of successively decreasing, to realize, electronics note more fully gives energy to electromagnetic field in channel.
Optimization function makes each layer of electronics infuse the high electric area for being all in channel edge for a long time as far as possible in traveling, can be real
Existing electronics note more fully gives energy to electromagnetic field, and the intercepting and capturing of electronics do not influence output power after transducing, are rolled over using all-metal
Folded waveguide slow-wave structure realizes heat management.The electronic efficiency and output power performance in terahertz emission source can be improved in the present invention.
The invention has the advantages that improve interaction impedance and electronics note move closer to electron beam channel edge
High electric area, device output power performance are improved.Output power is not influenced using the intercepting and capturing of electronics after transducing, is based on simultaneously
The good heat radiating ability of all-metal folded waveguide slow-wave structure avoids the low electron stream that traditional devices occur in Terahertz frequency domain
The problem of power-performance caused by passband declines.
Detailed description of the invention
Fig. 1 is the sectional view of folded waveguide slow-wave structure；
Fig. 2 is that a kind of radial dimension of the present invention successively decreases the folded waveguide slow-wave structure sectional view of electron beam channel；
Fig. 3 is that radial dimension of the present invention successively decreases influence of the electron beam channel to folded waveguide slow-wave structure coupled impedance；
Fig. 4 is influence of the electron beam channel different location of the present invention to folded waveguide slow-wave structure coupled impedance；
Fig. 5 is that each layer electronics progresses into the high electric area schematic diagram at electron beam channel edge to electronics note from outside to inside in traveling；
Fig. 6 is the hunting power using the device of slow-wave structure of the present invention；
Fig. 7 is to compare with size tradition folded waveguide slow-wave structure hunting power performance；
Specific embodiment
Have the effect of that radial dimension successively decreases the folded waveguide slow-wave structure of electron beam channel in order to which clear explanation is this, spy enumerates
Following instance, setting structure size a=1.9mm, b=0.3mm, p=0.7mm, h=0.7mm, d=0.44mm.Utilize three-dimensional electricity
Magnetic software simulates a kind of the successively decrease All metal slow wave structure of electron beam channel of radial dimension of the invention, and electricity is calculated
The coupled impedance of different location, simulates slow using the all-metal of convergence type electron beam channel in son note channel size and channel
The performance of wave structure device, at this point, electron beam channel inlet diameter is 0.44mm, the cone that exit is 0.16mm.It will
Analog result is compared with the note wave interaction result of traditional slow-wave structure of identical geometric dimension, the coupling resistance of slow-wave structure
Anti- simulation and device simulation result indicate in the accompanying drawings respectively.It can be seen that under the conditions of same interaction length, power
Increase to 1.5 times of former numerical value.It illustrates with reference to the accompanying drawing:
Referring to Fig.1, the sectional view of traditional folded waveguide slow-wave structure is indicated, the broadside of waveguide a length of a, b are that the narrow side of waveguide is long,
The geometry period is 2p, and straight wave guide height is h, and cylindrical electron beam channel diameter is d.
Referring to Fig. 2, successively decrease the folded waveguide slow-wave structure sectional view of electron beam channel for a kind of radial dimension of the present invention, wave
The broadside led a length of a, b are that the narrow side of waveguide is long, and the geometry period is 2p, and straight wave guide height is h, conical electron beam channel entrance
Place's diameter is d1, exit diameter is d2, angle θ, wherein d1>d2, d2≥0。
Referring to Fig. 3, successively decrease electron beam channel to the shadow of folded waveguide slow-wave structure coupled impedance for radial dimension of the present invention
It rings, slow-wave structure axis coupled impedance KCIncrease with the reduction of electron beam channel diameter d, variation tendency is approximately linear change
Change, therefore conical electron beam channel can make the coupled impedance of slow-wave structure be continuously increased along the direction that electronics note is advanced,
That is longitudinal electromagnetic field bigger required for note wave interaction can be set up in interaction region.
It is influence of the electron beam channel different location of the present invention to folded waveguide slow-wave structure coupled impedance referring to Fig. 4, by
In electromagnetic wave in variation of withering and falling in electron beam channel, in center, that is, axial location coupled impedance KCFor minimum value, when position is along X
When axis and mobile Y-axis channel edge, coupled impedance value constantly increases, and reaches channel edge coupled impedance and reaches maximum value.
Referring to Fig. 5, for electronics note, each layer electronics progresses into the high field at electron beam channel edge from outside to inside in traveling
Area's schematic diagram can allow more electronics to enter high electric area, be infused by electronics by the selection of electron beam channel end diameter
The optimization of channel distance can allow the electronics for entering high electric area to be advanced the sufficiently long time, adequately give its energy to electricity
Magnetic field obtains bigger output power.
Referring to Fig. 6, for using a kind of oscillator performance of slow-wave structure of the present invention, a kind of decreasing dimensions electron beam channel
The size of folded waveguide slow-wave structure is as follows: a=1.9mm, b=0.3mm, p=h=0.7mm, d1=0.44mm, d2=
0.16mm.Using 3 D electromagnetic software to the folded waveguide slow wave knot for having used a kind of decreasing dimensions electron beam channel of the invention
The oscillator of structure is simulated, and hunting power Pout is calculated.
Referring to Fig. 7, the oscillator output power and frequency of oscillation of identical geometric dimension tradition slow-wave structure are given, is used
After slow-wave structure of the present invention, the output power of oscillator is increased to 209W from 135W, and power increase rate reaches 55%, oscillation frequency
Rate has only changed 0.8%, and the time that oscillation reaches stable state reduces 50%, therefore only needs to carry out simple geometric dimension or electricity
Pressure adjustment can realize being substantially improved for output power under the conditions of identical frequency of oscillation using the device of the utility model structure；Mould
Quasi- result illustrates that new type slow wave structure of the present invention is that the microwave electron tube of core can be realized bigger power, together
When avoid the technical problem for needing to improve electronics flow rate, due to use All metal slow wave structure, electronics intercept and capture produced by
The available effective management of thermal energy, will not damage.
Claims (1)
1. a kind of successively decrease the folded waveguide slow-wave structure of electron beam channel with internal diameter, which is characterized in that along slow-wave structure
The electron beam channel of axis is become the cone of internal diameter gradual change from traditional uniform cylindrical；Electron beam channel cross section ruler
It is very little gradually to successively decrease along longitudinal direction, it forms electromagnetic field intensity in interaction region and gradually increases along longitudinal direction；It is radial by analog selection, adjustment
Size realizes the orientation optimization for electron beam channel of successively decreasing, and to realize, electronics note more fully gives energy to electromagnetic field in channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710884536.8A CN109559959A (en) | 2017-09-26 | 2017-09-26 | It is a kind of to successively decrease the folded waveguide slow-wave structure of electron beam channel with internal diameter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710884536.8A CN109559959A (en) | 2017-09-26 | 2017-09-26 | It is a kind of to successively decrease the folded waveguide slow-wave structure of electron beam channel with internal diameter |
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| Publication Number | Publication Date |
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| CN109559959A true CN109559959A (en) | 2019-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710884536.8A Pending CN109559959A (en) | 2017-09-26 | 2017-09-26 | It is a kind of to successively decrease the folded waveguide slow-wave structure of electron beam channel with internal diameter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111081509A (en) * | 2019-12-16 | 2020-04-28 | 中国电子科技集团公司第十二研究所 | Rectangular folded waveguide slow wave structure |
-
2017
- 2017-09-26 CN CN201710884536.8A patent/CN109559959A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111081509A (en) * | 2019-12-16 | 2020-04-28 | 中国电子科技集团公司第十二研究所 | Rectangular folded waveguide slow wave structure |
| CN111081509B (en) * | 2019-12-16 | 2021-08-06 | 中国电子科技集团公司第十二研究所 | Rectangular folded waveguide slow wave structure |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190402 |
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| WD01 | Invention patent application deemed withdrawn after publication |