CN107123842A - A kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency - Google Patents
A kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency Download PDFInfo
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- CN107123842A CN107123842A CN201710455197.1A CN201710455197A CN107123842A CN 107123842 A CN107123842 A CN 107123842A CN 201710455197 A CN201710455197 A CN 201710455197A CN 107123842 A CN107123842 A CN 107123842A
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- waveguide
- disk
- centre bore
- microwave
- loaded
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
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Abstract
The invention provides a kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency, it is provided with coaxial circular waveguide along coaxial circular waveguide shaft line direction and coaxial circular waveguide is divided into two-part metal plate, a portion waveguide is filled with cycle adjustable band centre bore disk-loaded waveguide, and a part is the fan-shaped coaxial waveguide of 180 degree.Frequency is divided into two parts for f TEM mode microwave by the metal plate in coaxial circular waveguide, and transmitted in the waveguide of each its corresponding part of leisure, by adjusting the band centre bore disk-loaded waveguide cycle corresponding with microwave frequency f, by the transmission apart from mp, the microwave of transmission produces 180 degree phase difference in two parts waveguide, and frequency is converted to TE for f microwave by TEM mode11Pattern.The present invention uses said structure and method, by adjusting the edge disk-loaded waveguide cycle, realizes that multifrequency point is converted to TE from the order of low frequency tremendously high frequency by TEM mode11Pattern.
Description
Technical field
The invention belongs to High-Power Microwave mode converter technical field, and in particular to a kind of band centre bore disk-loaded waveguide is more
Frequently controllable mode converter.
Background technology
Most high-power microwave sources have rotational symmetry structure, and the pattern that they are produced is mostly axisymmetry pattern.Often
See high-power microwave source, for example MILO, transit-time oscillator, relativistic backward wave oscillator, relativistic klystron
Output is all axial symmetry TEM mode or TM01Pattern.The transverse electric field of these patterns is axisymmetricly distributed, so as to cause its far field
Axial radiation is zero, i.e., so-called hollow wave beam, such microwave mode is unfavorable for directional transmissions and the transmitting of High-Power Microwave.In order to
Directed radiation is realized, generally by circular waveguide TM01Mould or TEM coaxial moding are changed to circular waveguide TE11Mould is to obtain on-axis gain.
Current adopted High-Power Microwave mode converter has following two substantially：Flexure type mapping mode and phase shift type conversion side
Formula.It is hyperbolic type waveguide mode conversion device to compare representational mode converter in flexure type mapping mode.Phase shift type is converted
Mode mainly includes coaxial board plug type mode converter, radial direction linear mode converter and dielectric media phase shifter.
For TM under waveguide transmission multifrequency state01Or the High-Power Microwave of TEM mode, because most mode converters have
Selecting frequency characteristic (narrow frequency), and design feature determines that some converters (hyperbolic type, radial direction linear mode converter) can not change knot
Structure parameter, or some converters (coaxial board plug type mode converter) Structural Transformation are larger, it is impossible to realize that across frequency range multifrequency point is high
Power microwave patten transformation.
From TEM mode and TE11The field structure of pattern is understood, the electric field of the half part of TEM mode cross section one is reverse
Obtain and TE11Approximate field distribution.Accordingly, it is considered to which TEM mould transmission waveguides are divided into angle is two parts of 180 degree, then divide
It is other that two parts are imposed with different phase shifts, make its produce 180 degree phase shift can implementation pattern conversion, that is, meet condition (β1-β2)·L
=π (β1, β2For fan-shaped interface waveguide phase velocity, L is mode converter length).
In the device or device that the electromagnetic field in using Transmission system interacts with electronics or other charged particles, example
Such as travelling-wave amplifier, particle accelerator, and in electromagnetic wave and the ripple such as sound wave compared with low velocity or magnetostatic wave interaction
In device, in order that interaction is persistently carried out, it is necessary to make the electromagnetic wave in Transmission system in relatively long distance and in the long period
Phase velocity is less than the space light velocity.This Transmission system is exactly slow wave system or slow-wave structure.It is made up of completely smooth conducting wall
Fast wave or TEM ripples can only be propagated in cylindrical system.Because can only be laterally standing wave in the system of complete homogeneous boundary condition,
The slow wave system wall of all-metal construction is unlikely to be smooth, uniformly.Conventional fold surface or the metal wave of corrugated surface
Lead as slow-wave structure.At this moment they are no longer homogeneous textures but a kind of periodic structure along longitudinal direction.When the space periodic of fold
During much smaller than guide wavelength, the system approximation on fold surface can be assign as homogeneous system.
The content of the invention
The invention provides a kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency, solve for waveguide transmission
TM under multifrequency state01Or the High-Power Microwave of TEM mode, because most mode converters have selecting frequency characteristic (narrow frequency), and knot
Structure feature determines that some converters (hyperbolic type, radial direction linear mode converter) can not change structural parameters, or some converters
(coaxial board plug type mode converter) Structural Transformation is larger, it is impossible to realize order of the multifrequency point according to low frequency tremendously high frequency by TEM moulds
Formula is to TE11The transfer problem of pattern, is divided into two parts, a part of fill cycle can be equal by metal plate by coaxial circular waveguide
The band centre bore disk-loaded waveguide of even section, another part is 180 fan-shaped coaxial waveguides, and metal plate makes frequency in coaxial circular waveguide
Transmission in the waveguide of two parts and each comfortable corresponding part is divided into for f TEM mode microwave.(m is for the transmission for being mp through distance
Positive integer, p is the band centre bore disk-loaded waveguide cycle), the microwave phase difference of two parts waveguide transmission reaches 180 degree, then realizes frequency
Rate is converted to TE for f TEM mode microwave11Pattern.
The present invention to achieve the above object, adopts the following technical scheme that realization：A kind of band centre bore disk-loaded waveguide multifrequency can
Control mode converter, be provided with along coaxial circular waveguide shaft line direction in coaxial circular waveguide coaxial circular waveguide is divided into it is two-part
Metal plate, a portion waveguide is filled with cycle adjustable band centre bore disk-loaded waveguide, and another part is fanned for 180 degree
Frequency is divided into two parts for f TEM mode microwave by the metal plate in shape coaxial waveguide, coaxial circular waveguide, and respectively
Transmitted in the waveguide of its comfortable corresponding part, by adjusting the band centre bore disk-loaded waveguide cycle corresponding with microwave frequency f, warp
The microwave for crossing transmission in the transmission (m is positive integer, and p is the band centre bore disk-loaded waveguide cycle) apart from mp, two parts waveguide is produced
180 degree phase difference, frequency is converted into TE for f TEM mode High-Power Microwave in mode converter output port11Pattern, if
Frequency f1Microwave TE is converted to by TEM mode11Pattern needs the distance by transmission to be mp1, frequency f2Microwave by TEM moulds
Formula is converted to TE11Pattern needs the distance by transmission to be mp2, frequency fnHigh-Power Microwave TE is converted to by TEM mode11Mould
Formula needs the distance by transmission to be mpn(n=1,2,3 ... ...), wherein frequency numerical relation are met：f1＜ f2＜ ... ＜
fn, its corresponding disk-loaded waveguide period-luminosity relation is：p1＞ p2＞ ... ＞ pn, then can be according to f1、f2、……、fnOrder, pass through
Regulation cycle of the correspondence with centre bore disk-loaded waveguide realizes that the microwave of multiple frequencies is converted to TE by TEM mode successively11Pattern.
Further, the cycle with centre bore disk-loaded waveguide by change its corresponding adjacent two disk-loaded waveguides piece it
Between distance be adjusted, and by the external control device for adjustment disk lotus waveguide distance realize successively band centre bore disk-loaded waveguide
Cycle is p1、p2、……、pnChange.
Further, the disk-loaded waveguide piece sets and is connected with the connection end with helicitic texture, the disk-loaded waveguide piece
It is attached by helicitic texture with the screw rod with the equal difference pitch of thread, screw rod connection external control device.
The present invention compared with prior art, with advantages below and beneficial effect：
Compared with prior art, coaxial circular waveguide is divided into two parts by the present invention using a metal plate, wherein one
It is p band centre bore disk-loaded waveguides to divide fill cycle, and another part is the fan-shaped coaxial waveguide of 180 degree.Metal plate makes coaxial circles ripple
Lead the TEM mode microwave that interior frequency is f and be divided into transmission in two parts, and the waveguide of its each comfortable corresponding part, pass through and adjust
In the section band centre bore disk-loaded waveguide cycle corresponding with microwave frequency f, by the transmission apart from mp, (m is positive integer, and p is with
The heart hole disk-loaded waveguide cycle), the microwave of the interior transmission of two parts waveguide produces 180 degree phase difference, and frequency is f microwave by TEM moulds
Formula is converted to TE11Pattern.In addition, with the centre bore disk-loaded waveguide cycle can even regulation, pass through external control device realize band centre bore
The disk-loaded waveguide cycle is p1、p2、……、pnChange.Disk-loaded waveguide piece passes through helicitic texture and the screw rod with the equal difference pitch of thread
It is attached, screw rod is diametrically rotated and drives connected disk-loaded waveguide piece to move corresponding distance, and band is changed with this
The cycle of centre bore disk-loaded waveguide.
The present invention realizes multifrequency point according to low frequency by adjusting the design method with centre bore disk-loaded waveguide periodic structure
The order of tremendously high frequency is realized by TEM mode to TE11The conversion of pattern.The mode conversion method is simple in construction, compact, easy manipulation,
And it is easy to integrated with conical-horn antenna, obtain High-Power Microwave on-axis gain.
Brief description of the drawings
Fig. 1 is the side, sectional structural representation with the controllable mode converter of centre bore disk-loaded waveguide multifrequency.
Fig. 2 is the front cross-sectional structural representation with the controllable mode converter of centre bore disk-loaded waveguide multifrequency.
Wherein：1st, circular waveguide, 2, disk-loaded waveguide piece, 3, coaxial inner conductor, 4, metal plate.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
A kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency as shown in Figure 1, including coaxial circular waveguide, coaxially
Circular waveguide includes circular waveguide, the coaxial inner conductor set in circular waveguide along circular waveguide axis direction, and circular waveguide is round metal ripple
Lead, coaxial inner conductor is metal coaxial inner conductor.It is provided with coaxial circular waveguide along coaxial circular waveguide shaft line direction by coaxial circles
Waveguide is divided into two-part metal plate, and metal plate is metal thin flat plate, and a portion waveguide is adjustable filled with the cycle
Band centre bore disk-loaded waveguide, another part is the fan-shaped coaxial circular waveguide of 180 degree.Metal plate makes the frequency in coaxial circular waveguide be
F TEM mode microwave is divided into two parts, and a portion is transmitted in band centre bore disk-loaded waveguide, and another part continues
Transmitted in the fan-shaped coaxial circular waveguide of 180 degree, and company is fixed on the positioning in coaxial circular waveguide and coaxial inner conductor by metal plate
Connect.
As shown in Fig. 2 the cycle of disk-loaded waveguide piece is p, the distance between two disk-loaded waveguide pieces are d, and external control is passed through apart from d
Device can realize even variation, so as to realize the regulation that the disk-loaded waveguide cycle is p.When transforming to certain value apart from d so that disk lotus
Waveguide period p can realize the microwave that the frequency transmitted in disk-loaded waveguide is f and the microwave phase transmitted in circular waveguide just
When potential difference reaches 180 degree, and then realize that the microwave that the frequency is f is converted to TE by TEM mode11Pattern, you can to pass through regulation
In the band centre bore disk-loaded waveguide cycle corresponding with microwave frequency f, by the transmission apart from mp, (m is positive integer, and p is band center
The hole disk-loaded waveguide cycle), the microwave of the interior transmission of two parts waveguide produces 180 degree phase difference, and frequency is f microwave by TEM mode
Be converted to TE11Pattern.
If frequency f1Microwave TE is converted to by TEM mode11Pattern needs the distance by transmission to be mp1, frequency f2It is micro-
Ripple is converted to TE by TEM mode11Pattern needs the distance by transmission to be mp2, frequency fnHigh-Power Microwave by TEM mode turn
It is changed to TE11Pattern needs the distance by transmission to be mpn(n=1,2,3 ... ...), wherein frequency numerical relation are met：f1＜
f2＜ ... ＜ fn, its corresponding disk-loaded waveguide period-luminosity relation is：p1＞ p2＞ ... ＞ pn, then can be according to f1, f2... ..., fn's
Sequentially, realize that the microwave of multiple frequencies is converted to TE by TEM mode successively with the centre bore disk-loaded waveguide cycle by regulation correspondence11
Pattern.Cycle with centre bore disk-loaded waveguide can even regulation, and pass through external control device realize band the centre bore disk-loaded waveguide cycle
For p1、p2、……、pnChange.
Disk-loaded waveguide piece sets and is connected with the connection end with helicitic texture, and disk-loaded waveguide piece by helicitic texture with
Screw rod with the equal difference pitch of thread is attached, and screw rod is through helicitic texture and is enclosed in helicitic texture, band center porose disc lotus ripple
Lead the cycle is adjusted by changing the distance between its corresponding adjacent two disk-loaded waveguides piece.Screw rod can with radial rotating, but
It is to be axially moved, screw rod radial rotating makes connected each band centre bore disk-loaded waveguide piece move up phase in respective axle
The distance answered.Its pitch of thread of screw rod be respectively M, 2M, 3M ..., nM the distance between (M be two neighboring screw thread), Ge Dai centers
Disk-loaded waveguide piece coupled screw rod in hole is corresponding to the same.
The need for according to patten transformation frequency, screw rod is rotated to an angle θ (units：Radian), each disk-loaded waveguide piece
Respective axial movement distance be respectively θ M, 2 θ M, 3 θ M ..., n θ M, that is, cause disk-loaded waveguide piece each axially
Displacement be l, 2l, 3l ..., nl (l=θ M), the distance between such disk-loaded waveguide piece is changed into d ± l by d, corresponding
Band centre bore disk-loaded waveguide Cycle Length is changed into p ± l from p, and this belt transect centre bore disk-loaded waveguide cycle realizes even regulation.
It is assumed that frequency is f1TEM mode microwave propagated in the coaxial circular waveguide of vacuum, then through one divide equally waveguide gold
Belong to flat board, frequency is f1TEM mode microwave half band centre bore disk-loaded waveguide in transmit, in addition half continue in 180 degree
Transmitted in fan-shaped coaxial circular waveguide, because the phase velocity that microwave is propagated in two parts is different, by transmission range mp1, exist respectively
180 degree phase difference is produced with the TEM mode microwave transmitted in centre bore disk-loaded waveguide and the fan-shaped coaxial waveguide of 180 degree, then frequency
For f1TEM mode High-Power Microwave be converted to TE in mode converter output port11Pattern.
Change the band centre bore disk-loaded waveguide cycle, it is p to make its cycle2, frequency is f2TEM mode microwave pass through transmission distance
From mp2, the TEM mode microwave generation 180 degree phase transmitted respectively in centre bore disk-loaded waveguide and the fan-shaped coaxial waveguide of 180 degree
Potential difference, then frequency is f2TEM mode High-Power Microwave be converted to TE in mode converter output port11Pattern.
Continue to change the band centre bore disk-loaded waveguide cycle, it is p to make its cyclen, frequency is fnTEM mode microwave through biography
It is defeated apart from mpn, the TEM mode microwave generation 180 transmitted respectively in centre bore disk-loaded waveguide and the fan-shaped coaxial waveguide of 180 degree
Phase difference is spent, then frequency is fnTEM mode High-Power Microwave be converted to TE in mode converter output port11Pattern.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (3)
1. a kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency, it is characterised in that along coaxial circles ripple in coaxial circular waveguide
Lead axis direction and be provided with and coaxial circular waveguide is divided into two-part metal plate, a portion waveguide is filled with week
Phase adjustable band centre bore disk-loaded waveguide, another part is the TEM that frequency is f in the fan-shaped coaxial waveguide of 180 degree, coaxial circular waveguide
Modes microwave is divided into two parts, and the waveguide of its each comfortable corresponding part by the metal plate and transmitted, and passes through regulation
In the band centre bore disk-loaded waveguide cycle corresponding with microwave frequency f, by the transmission apart from mp, (m is positive integer, and p is band center
The hole disk-loaded waveguide cycle), the microwave of the interior transmission of two parts waveguide produces 180 degree phase difference, and frequency is f TEM mode high power
Microwave is converted into TE in mode converter output port11Pattern, if frequency f1Microwave TE is converted to by TEM mode11Pattern
It is mp to need the distance by transmission1, frequency f2Microwave TE is converted to by TEM mode11Pattern needs the distance by transmission
For mp2, frequency fnHigh-Power Microwave TE is converted to by TEM mode11Pattern needs the distance by transmission to be mpn(n=1,2,
3 ... ...), the numerical relation of wherein frequency is met：f1＜ f2＜ ... ＜ fn, its corresponding disk-loaded waveguide period-luminosity relation is：p1
＞ p2＞ ... ＞ pn, then can be according to f1、f2、……、fnOrder, pass through that to adjust cycle of the correspondence with centre bore disk-loaded waveguide real
The microwave of existing multiple frequencies is converted to TE by TEM mode successively11Pattern.
2. a kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency according to claim 1, it is characterised in that institute
State the cycle with centre bore disk-loaded waveguide is adjusted by changing the distance between its corresponding adjacent two disk-loaded waveguides piece, and
Realize that the band centre bore disk-loaded waveguide cycle is p successively by the external control device for adjustment disk lotus waveguide distance1、p2、……、pn
Change.
3. a kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency according to claim 1, it is characterised in that institute
State disk-loaded waveguide piece and set and be connected with the connection end with helicitic texture, the disk-loaded waveguide piece by helicitic texture with etc.
The screw rod of the poor pitch of thread is attached, screw rod connection external control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710455197.1A CN107123842A (en) | 2017-06-16 | 2017-06-16 | A kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency |
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| CN201710455197.1A CN107123842A (en) | 2017-06-16 | 2017-06-16 | A kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749507A (en) * | 2017-10-27 | 2018-03-02 | 中国人民解放军国防科技大学 | High-power microwave TE21‑TM01Mode converter |
| CN110534907A (en) * | 2019-09-24 | 2019-12-03 | 中国人民解放军国防科技大学 | Dual-band cross mode conversion antenna |
| CN115377638A (en) * | 2022-06-23 | 2022-11-22 | 湖南大学 | High-power microwave coaxial TEM-circular waveguide TE 11 Mode converter |
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| CN205122739U (en) * | 2015-11-04 | 2016-03-30 | 中国工程物理研究院应用电子学研究所 | Even adjustable device of centre bore disk loaded waveguide cycle |
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| CN206834307U (en) * | 2017-06-16 | 2018-01-02 | 中国工程物理研究院应用电子学研究所 | A kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency |
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| CN103219567A (en) * | 2013-04-09 | 2013-07-24 | 中国工程物理研究院应用电子学研究所 | Metamaterial mode converter |
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| CN107749507A (en) * | 2017-10-27 | 2018-03-02 | 中国人民解放军国防科技大学 | High-power microwave TE21‑TM01Mode converter |
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| CN110534907A (en) * | 2019-09-24 | 2019-12-03 | 中国人民解放军国防科技大学 | Dual-band cross mode conversion antenna |
| CN115377638A (en) * | 2022-06-23 | 2022-11-22 | 湖南大学 | High-power microwave coaxial TEM-circular waveguide TE 11 Mode converter |
| CN115377638B (en) * | 2022-06-23 | 2023-03-14 | 湖南大学 | High-power microwave coaxial TEM-circular waveguide TE 11 Mode converter |
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