CN206834307U - 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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- CN206834307U CN206834307U CN201720700360.1U CN201720700360U CN206834307U CN 206834307 U CN206834307 U CN 206834307U CN 201720700360 U CN201720700360 U CN 201720700360U CN 206834307 U CN206834307 U CN 206834307U
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Abstract
The utility model provides a kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency, the coaxial coaxial circular waveguide shaft line direction of circular waveguide interior edge is provided with is divided into two-part metal plate by coaxial circular waveguide, a portion waveguide is filled with cycle adjustable band centre bore disk-loaded waveguide, and a part is 180 degree sector coaxial waveguide.The TEM mode microwave that frequency is f in coaxial circular waveguide is divided into two parts by the metal plate, 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 distance mp transmission, the microwave of transmission produces 180 degree phase difference in two parts waveguide, and frequency is that f microwave is converted to TE by TEM mode11Pattern.The utility model uses said structure and method, by adjusting the edge disk-loaded waveguide cycle, realize that multifrequency point is converted to TE from the order of low frequency tremendously high frequency by TEM mode11Pattern.
Description
Technical field
The utility model belongs to High-Power Microwave mode converter technical field, and in particular to a kind of band center porose disc lotus ripple
Lead the controllable mode converter of multifrequency.
Background technology
Most high-power microwave sources have rotational symmetry structure, and pattern is mostly axisymmetry pattern caused by them.Often
See high-power microwave source, such as 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.More representational mode converter is hyperbolic type waveguide mode conversion device in flexure type mapping mode.Phase shift type converts
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, can not 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
Acquisition 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 along longitudinal direction be no longer homogeneous texture but a kind of periodic structure.When the space periodic of fold
, can be using the system approximation on fold surface as homogeneous system during much smaller than guide wavelength.
Utility model content
The utility model provides a kind of band controllable mode converter of centre bore disk-loaded waveguide multifrequency, solves for waveguide
Transmit TM under 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 structural parameters, or some turns
Parallel operation (coaxial board plug type mode converter) Structural Transformation is larger, can not realize multifrequency point according to low frequency tremendously high frequency order by
TEM mode is to TE11The transfer problem of pattern, coaxial circular waveguide is divided into by two parts, part filling week by metal plate
Phase can even regulation band centre bore disk-loaded waveguide, another part is 180 fan-shaped coaxial waveguides, and metal plate makes coaxial circular waveguide
The TEM mode microwave that interior frequency is f, which is divided into the waveguide of two parts and each comfortable corresponding part, to be transmitted.Through the biography that distance is mp
Defeated (m is positive integer, and p is the band centre bore disk-loaded waveguide cycle), the microwave phase difference of two parts waveguide transmission reaches 180 degree, then
Realize that the TEM mode microwave that frequency is f is converted to TE11Pattern.
The utility model to achieve the above object, adopts the following technical scheme that realization：A kind of band centre bore disk-loaded waveguide is more
Frequently controllable mode converter, it is characterised in that the coaxial coaxial circular waveguide shaft line direction of circular waveguide interior edge is provided with coaxial circular waveguide
Two-part metal plate is divided into, a portion waveguide is filled with cycle adjustable band centre bore disk-loaded waveguide, separately
A part is 180 degree sector coaxial waveguide, and frequency is that f TEM mode microwave is divided equally by the metal plate in coaxial circular waveguide
For two parts, and transmitted in the waveguide of its each comfortable corresponding part, transmission range be that (m is positive integer to mp, and p is with centre bore
The disk-loaded waveguide cycle), phase difference caused by the microwave of the interior transmission of two parts waveguide is 180 degree, and frequency is f TEM mode Gao Gong
Rate microwave is converted into TE in mode converter output port11Pattern, if frequency f1Microwave TE is converted to by TEM mode11Mould
It is mp that formula, which needs the distance by transmission,1, frequency f2Microwave TE is converted to by TEM mode11Pattern need by transmission away from
From for mp2... ..., frequency fnHigh-Power Microwave TE is converted to by TEM mode11It is mp that pattern, which needs the distance by transmission,n(n
=1,2,3 ... ...), the numerical relation of wherein frequency meets：f1＜ f2＜ ... ＜ fn, its corresponding disk-loaded waveguide period-luminosity relation
For：p1＞ p2＞ ... pn, then can be according to f1、f2、……、fnOrder, pass through and adjust the corresponding band centre bore disk-loaded waveguide cycle
Realize that the TEM mode microwave of multiple frequencies is converted to TE in mode converter output port successively11Pattern.
Further, the cycle with centre bore disk-loaded waveguide by change adjacent two disk-loaded waveguides piece corresponding to it
Between distance be adjusted, and by for the external control device of 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 and the screw rod with the equal difference pitch of thread, screw rod connection external control device.
The utility model compared with prior art, has advantages below and beneficial effect：
Compared with prior art, coaxial circular waveguide is divided into two parts by the utility model using a metal plate, wherein
A part of fill cycle is p band centre bore disk-loaded waveguides, and another part is 180 degree sector coaxial waveguide.Metal plate makes coaxially
The TEM mode microwave that frequency is f in circular waveguide is divided into two parts, and is transmitted in the waveguide of its each comfortable corresponding part, leads to
The band centre bore disk-loaded waveguide cycle corresponding with microwave frequency f is overregulated, (m is positive integer, and p is by distance mp transmission
The band centre bore disk-loaded waveguide cycle), the microwave of transmission produces 180 degree phase difference in two parts waveguide, the microwave that frequency is f by
TEM mode is converted to TE11Pattern.In addition, with the centre bore disk-loaded waveguide cycle can even regulation, by external control device realize band in
The heart hole disk-loaded waveguide cycle is p1、p2、……、pnChange.Disk-loaded waveguide piece is by helicitic texture with having the equal difference pitch of thread
Screw rod is attached, and screw rod diametrically rotates and drives connected disk-loaded waveguide piece to move corresponding distance, is changed with this
The cycle of variable speed centre bore disk-loaded waveguide.
The utility model by adjust the design method with centre bore disk-loaded waveguide periodic structure, realize multifrequency point according to
The order of low frequency tremendously high frequency is realized by TEM mode to TE11The conversion of pattern.Mode conversion method behaviour simple in construction, compact, easy
Control, and be easy to integrate 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 that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
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 interior edge circular waveguide axis direction, and circular waveguide is round metal ripple
Lead, coaxial inner conductor is metal coaxial inner conductor.The coaxial coaxial circular waveguide shaft line direction of circular waveguide interior edge is provided with 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 18 degree coaxial circular waveguides of sector.Metal plate makes frequency in coaxial circular waveguide be f
TEM mode microwave be divided into two parts, a portion is transmitted in band centre bore disk-loaded waveguide, and another part continues to exist
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 distance d passes through external control
Device can realize even variation, so as to realize regulation of the disk-loaded waveguide cycle for p.When distance d transforms to certain value 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 distance mp transmission, (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 mode11It is mp that pattern, which needs the distance by transmission,1, frequency f2It is micro-
Ripple is converted to TE by TEM mode11It is mp that pattern, which needs the distance by transmission,2, frequency fnHigh-Power Microwave by TEM mode turn
It is changed to TE11It is mp that pattern, which needs the distance by transmission,n(n=1,2,3 ... ...), wherein frequency numerical relation meet：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 adjusting to correspond to11
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 adjacent two disk-loaded waveguides piece corresponding to it.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), each band center
Disk-loaded waveguide piece coupled screw rod in hole is corresponding to the same.
According to the needs of 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 ..., the distance between nl (l=θ M), such disk-loaded waveguide piece d ± l is changed into by d, it is 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 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 180 degree sector coaxial waveguide, 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 f2TEM mode microwave pass through transmission distance
From mp2, the TEM mode microwave that is transmitted respectively in centre bore disk-loaded waveguide and 180 degree sector coaxial waveguide produces 180 degree phase
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 fnTEM mode microwave through biography
Defeated distance mpn, the TEM mode microwave that is transmitted respectively in centre bore disk-loaded waveguide and 180 degree sector coaxial waveguide produces 180
Phase difference is spent, then frequency is fnTEM mode High-Power Microwave be converted to TE in mode converter output port11Pattern.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (3)
- A kind of 1. band controllable mode converter of centre bore disk-loaded waveguide multifrequency, it is characterised in that coaxial circular waveguide interior edge coaxial circles ripple 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 are 180 degree sector coaxial waveguide, and frequency is f TEM in coaxial circular waveguide Modes microwave is divided into two parts by the metal plate, and is transmitted in the waveguide of its each comfortable corresponding part, transmission range For mp (m is positive integer, and p is the band centre bore disk-loaded waveguide cycle), phase difference caused by the microwave of the interior transmission of two parts waveguide is 180 degree, frequency are that f TEM mode High-Power Microwave is converted into TE in mode converter output port11Pattern, if frequency f1 Microwave TE is converted to by TEM mode11It is mp that pattern, which needs the distance by transmission,1, frequency f2Microwave changed by TEM mode For TE11It is mp that pattern, which needs the distance by transmission,2... ..., frequency fnHigh-Power Microwave TE is converted to by TEM mode11Mould It is mp that formula, which needs the distance by transmission,n(n=1,2,3 ... ...), wherein frequency numerical relation meet：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 tune Section is corresponding to realize that the TEM mode microwave of multiple frequencies turns in mode converter output port successively with the centre bore disk-loaded waveguide cycle It is changed to TE11Pattern.
- A kind of 2. 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 adjacent two disk-loaded waveguides piece corresponding to it, and By realizing that the band centre bore disk-loaded waveguide cycle is p successively for the external control device of adjustment disk lotus waveguide distance1、p2、……、pn Change.
- A kind of 3. 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.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107123842A (en) * | 2017-06-16 | 2017-09-01 | 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107123842A (en) * | 2017-06-16 | 2017-09-01 | 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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